A Herschel/PACS Far-infrared Line Emission Survey of Local Luminous Infrared Galaxies
We present an analysis of , [O iii]88, [N ii]122, and far-infrared (FIR) fine-structure line observations obtained with Herschel/PACS, for ∼240 local luminous infrared galaxies (LIRGs) in the Great Observatories All-sky LIRG Survey. We find pronounced declines ("deficits") of line-to-FIR c...
Gespeichert in:
| Veröffentlicht in: | The Astrophysical journal 2017-09, Vol.846 (1), p.32 |
|---|---|
| Hauptverfasser: | , , , , , , , , , , , , , , , , , , , , , , |
| Format: | Artikel |
| Sprache: | eng |
| Schlagworte: | |
| Online-Zugang: | Volltext bestellen |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
| container_end_page | |
|---|---|
| container_issue | 1 |
| container_start_page | 32 |
| container_title | The Astrophysical journal |
| container_volume | 846 |
| creator | Díaz-Santos, T. Armus, L. Charmandaris, V. Lu, N. Stierwalt, S. Stacey, G. Malhotra, S. Werf, P. P. van der Howell, J. H. Privon, G. C. Mazzarella, J. M. Goldsmith, P. F. Murphy, E. J. Barcos-Muñoz, L. Linden, S. T. Inami, H. Larson, K. L. Evans, A. S. Appleton, P. Iwasawa, K. Lord, S. Sanders, D. B. Surace, J. A. |
| description | We present an analysis of , [O iii]88, [N ii]122, and far-infrared (FIR) fine-structure line observations obtained with Herschel/PACS, for ∼240 local luminous infrared galaxies (LIRGs) in the Great Observatories All-sky LIRG Survey. We find pronounced declines ("deficits") of line-to-FIR continuum emission for [N ii]122, , and as a function of FIR color and infrared luminosity surface density, . The median electron density of the ionized gas in LIRGs, based on the [N ii]122/[N ii]205 ratio, is = 41 cm−3. We find that the dispersion in the deficit of LIRGs is attributed to a varying fractional contribution of photodissociation regions (PDRs) to the observed emission, f( ) = / , which increases from ∼60% to ∼95% in the warmest LIRGs. The / ratio is tightly correlated with the PDR gas kinetic temperature in sources where is not optically thick or self-absorbed. For each galaxy, we derive the average PDR hydrogen density, , and intensity of the interstellar radiation field, G, in units of and find G/ ratios of ∼0.1-50 cm3, with ULIRGs populating the upper end of the distribution. There is a relation between G/ and , showing a critical break at 5 × 1010 L kpc−2. Below , G/ remains constant, 0.32 cm3, and variations in are driven by the number density of star-forming regions within a galaxy, with no change in their PDR properties. Above , G/ increases rapidly with , signaling a departure from the typical PDR conditions found in normal star-forming galaxies toward more intense/harder radiation fields and compact geometries typical of starbursting sources. |
| doi_str_mv | 10.3847/1538-4357/aa81d7 |
| format | Article |
| fullrecord | <record><control><sourceid>proquest_O3W</sourceid><recordid>TN_cdi_iop_journals_10_3847_1538_4357_aa81d7</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sourcerecordid>2365732520</sourcerecordid><originalsourceid>FETCH-LOGICAL-c521t-3129e0322823302462dd0ce29ed791b15e8b8b7f47badd40bbfd6d1b512f70063</originalsourceid><addsrcrecordid>eNp1kc1LxDAQxYMouH7cPQa8iXUnSdN0j8uirlBQWBe8hTRJ2Ui3WZNW9L-3tbqePAzDDL95vOEhdEHghuWpmBLO8iRlXEyVyokRB2iyXx2iCQCkScbEyzE6ifF1GOlsNkHrOV7aEPXG1tOn-WKF71RIXFMFFazBhWssvt26GJ1v8KoL7_YT-woXXqsaF93WNb6L-OGXv1e1-nA2nqGjStXRnv_0U7S-u31eLJPi8f5hMS8SzSlpE0bozAKjNKeMAU0zagxo2y-NmJGScJuXeSmqVJTKmBTKsjKZISUntBIAGTtFl6Ouj62TUbvW6o32TWN1K3tZwXMieupqpDaqlrvgtip8Sq-cXM4L6ZrYSWCCQEbYO-lhMsI6dloGq23Qqv3G98NQFASVjAMj8GdjF_xbZ2MrX30Xmv5zSVnGBaOcDhT8KAcfY7DV3gsBOWQoh8DkEJgcM-xPrscT53d_mv_iXxaDma0</addsrcrecordid><sourcetype>Open Access Repository</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype><pqid>2365732520</pqid></control><display><type>article</type><title>A Herschel/PACS Far-infrared Line Emission Survey of Local Luminous Infrared Galaxies</title><source>IOP Publishing Free Content</source><creator>Díaz-Santos, T. ; Armus, L. ; Charmandaris, V. ; Lu, N. ; Stierwalt, S. ; Stacey, G. ; Malhotra, S. ; Werf, P. P. van der ; Howell, J. H. ; Privon, G. C. ; Mazzarella, J. M. ; Goldsmith, P. F. ; Murphy, E. J. ; Barcos-Muñoz, L. ; Linden, S. T. ; Inami, H. ; Larson, K. L. ; Evans, A. S. ; Appleton, P. ; Iwasawa, K. ; Lord, S. ; Sanders, D. B. ; Surace, J. A.</creator><creatorcontrib>Díaz-Santos, T. ; Armus, L. ; Charmandaris, V. ; Lu, N. ; Stierwalt, S. ; Stacey, G. ; Malhotra, S. ; Werf, P. P. van der ; Howell, J. H. ; Privon, G. C. ; Mazzarella, J. M. ; Goldsmith, P. F. ; Murphy, E. J. ; Barcos-Muñoz, L. ; Linden, S. T. ; Inami, H. ; Larson, K. L. ; Evans, A. S. ; Appleton, P. ; Iwasawa, K. ; Lord, S. ; Sanders, D. B. ; Surace, J. A.</creatorcontrib><description>We present an analysis of , [O iii]88, [N ii]122, and far-infrared (FIR) fine-structure line observations obtained with Herschel/PACS, for ∼240 local luminous infrared galaxies (LIRGs) in the Great Observatories All-sky LIRG Survey. We find pronounced declines ("deficits") of line-to-FIR continuum emission for [N ii]122, , and as a function of FIR color and infrared luminosity surface density, . The median electron density of the ionized gas in LIRGs, based on the [N ii]122/[N ii]205 ratio, is = 41 cm−3. We find that the dispersion in the deficit of LIRGs is attributed to a varying fractional contribution of photodissociation regions (PDRs) to the observed emission, f( ) = / , which increases from ∼60% to ∼95% in the warmest LIRGs. The / ratio is tightly correlated with the PDR gas kinetic temperature in sources where is not optically thick or self-absorbed. For each galaxy, we derive the average PDR hydrogen density, , and intensity of the interstellar radiation field, G, in units of and find G/ ratios of ∼0.1-50 cm3, with ULIRGs populating the upper end of the distribution. There is a relation between G/ and , showing a critical break at 5 × 1010 L kpc−2. Below , G/ remains constant, 0.32 cm3, and variations in are driven by the number density of star-forming regions within a galaxy, with no change in their PDR properties. Above , G/ increases rapidly with , signaling a departure from the typical PDR conditions found in normal star-forming galaxies toward more intense/harder radiation fields and compact geometries typical of starbursting sources.</description><identifier>ISSN: 0004-637X</identifier><identifier>EISSN: 1538-4357</identifier><identifier>DOI: 10.3847/1538-4357/aa81d7</identifier><language>eng</language><publisher>Philadelphia: The American Astronomical Society</publisher><subject>Astronomia infraroja ; Astrophysics ; ASTROPHYSICS, COSMOLOGY AND ASTRONOMY ; Continuum radiation ; DENSITY ; DISPERSIONS ; DISSOCIATION ; DISTRIBUTION ; ELECTRON DENSITY ; EMISSION ; Emission analysis ; Evolució de les galàxies ; Far infrared radiation ; FINE STRUCTURE ; GALACTIC EVOLUTION ; GALAXIES ; Galaxies evolution ; galaxies: ISM ; galaxies: nuclei ; galaxies: starburst ; GALAXY NUCLEI ; HYDROGEN ; Infrared analysis ; Infrared astronomy ; Infrared emissions ; infrared: galaxies ; Interstellar radiation ; LUMINOSITY ; Observatories ; Photodissociation ; PHOTOLYSIS ; Radiation ; Sciences of the Universe ; Sky surveys (astronomy) ; Space telescopes ; Star formation ; STARS ; Stars & galaxies</subject><ispartof>The Astrophysical journal, 2017-09, Vol.846 (1), p.32</ispartof><rights>2017. The American Astronomical Society. All rights reserved.</rights><rights>Copyright IOP Publishing Sep 01, 2017</rights><rights>(c) American Astronomical Society, 2017 info:eu-repo/semantics/openAccess</rights><rights>Distributed under a Creative Commons Attribution 4.0 International License</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c521t-3129e0322823302462dd0ce29ed791b15e8b8b7f47badd40bbfd6d1b512f70063</citedby><cites>FETCH-LOGICAL-c521t-3129e0322823302462dd0ce29ed791b15e8b8b7f47badd40bbfd6d1b512f70063</cites><orcidid>0000-0003-0057-8892 ; 0000-0002-1000-6081 ; 0000-0002-7607-8766 ; 0000-0003-0699-6083 ; 0000-0001-5434-5942 ; 0000-0002-2596-8531 ; 0000-0002-4923-3281 ; 0000-0002-6622-8396 ; 0000-0002-9226-5350 ; 0000-0001-7089-7325 ; 0000-0002-1233-9998 ; 0000-0001-7291-0087 ; 0000-0002-2688-1956 ; 0000-0002-8948-1044 ; 0000-0003-3474-1125</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://iopscience.iop.org/article/10.3847/1538-4357/aa81d7/pdf$$EPDF$$P50$$Giop$$H</linktopdf><link.rule.ids>230,314,776,780,881,26951,27901,27902,38867,53842</link.rule.ids><linktorsrc>$$Uhttps://iopscience.iop.org/article/10.3847/1538-4357/aa81d7$$EView_record_in_IOP_Publishing$$FView_record_in_$$GIOP_Publishing</linktorsrc><backlink>$$Uhttps://insu.hal.science/insu-03710613$$DView record in HAL$$Hfree_for_read</backlink><backlink>$$Uhttps://www.osti.gov/biblio/22875817$$D View this record in Osti.gov$$Hfree_for_read</backlink></links><search><creatorcontrib>Díaz-Santos, T.</creatorcontrib><creatorcontrib>Armus, L.</creatorcontrib><creatorcontrib>Charmandaris, V.</creatorcontrib><creatorcontrib>Lu, N.</creatorcontrib><creatorcontrib>Stierwalt, S.</creatorcontrib><creatorcontrib>Stacey, G.</creatorcontrib><creatorcontrib>Malhotra, S.</creatorcontrib><creatorcontrib>Werf, P. P. van der</creatorcontrib><creatorcontrib>Howell, J. H.</creatorcontrib><creatorcontrib>Privon, G. C.</creatorcontrib><creatorcontrib>Mazzarella, J. M.</creatorcontrib><creatorcontrib>Goldsmith, P. F.</creatorcontrib><creatorcontrib>Murphy, E. J.</creatorcontrib><creatorcontrib>Barcos-Muñoz, L.</creatorcontrib><creatorcontrib>Linden, S. T.</creatorcontrib><creatorcontrib>Inami, H.</creatorcontrib><creatorcontrib>Larson, K. L.</creatorcontrib><creatorcontrib>Evans, A. S.</creatorcontrib><creatorcontrib>Appleton, P.</creatorcontrib><creatorcontrib>Iwasawa, K.</creatorcontrib><creatorcontrib>Lord, S.</creatorcontrib><creatorcontrib>Sanders, D. B.</creatorcontrib><creatorcontrib>Surace, J. A.</creatorcontrib><title>A Herschel/PACS Far-infrared Line Emission Survey of Local Luminous Infrared Galaxies</title><title>The Astrophysical journal</title><addtitle>APJ</addtitle><addtitle>Astrophys. J</addtitle><description>We present an analysis of , [O iii]88, [N ii]122, and far-infrared (FIR) fine-structure line observations obtained with Herschel/PACS, for ∼240 local luminous infrared galaxies (LIRGs) in the Great Observatories All-sky LIRG Survey. We find pronounced declines ("deficits") of line-to-FIR continuum emission for [N ii]122, , and as a function of FIR color and infrared luminosity surface density, . The median electron density of the ionized gas in LIRGs, based on the [N ii]122/[N ii]205 ratio, is = 41 cm−3. We find that the dispersion in the deficit of LIRGs is attributed to a varying fractional contribution of photodissociation regions (PDRs) to the observed emission, f( ) = / , which increases from ∼60% to ∼95% in the warmest LIRGs. The / ratio is tightly correlated with the PDR gas kinetic temperature in sources where is not optically thick or self-absorbed. For each galaxy, we derive the average PDR hydrogen density, , and intensity of the interstellar radiation field, G, in units of and find G/ ratios of ∼0.1-50 cm3, with ULIRGs populating the upper end of the distribution. There is a relation between G/ and , showing a critical break at 5 × 1010 L kpc−2. Below , G/ remains constant, 0.32 cm3, and variations in are driven by the number density of star-forming regions within a galaxy, with no change in their PDR properties. Above , G/ increases rapidly with , signaling a departure from the typical PDR conditions found in normal star-forming galaxies toward more intense/harder radiation fields and compact geometries typical of starbursting sources.</description><subject>Astronomia infraroja</subject><subject>Astrophysics</subject><subject>ASTROPHYSICS, COSMOLOGY AND ASTRONOMY</subject><subject>Continuum radiation</subject><subject>DENSITY</subject><subject>DISPERSIONS</subject><subject>DISSOCIATION</subject><subject>DISTRIBUTION</subject><subject>ELECTRON DENSITY</subject><subject>EMISSION</subject><subject>Emission analysis</subject><subject>Evolució de les galàxies</subject><subject>Far infrared radiation</subject><subject>FINE STRUCTURE</subject><subject>GALACTIC EVOLUTION</subject><subject>GALAXIES</subject><subject>Galaxies evolution</subject><subject>galaxies: ISM</subject><subject>galaxies: nuclei</subject><subject>galaxies: starburst</subject><subject>GALAXY NUCLEI</subject><subject>HYDROGEN</subject><subject>Infrared analysis</subject><subject>Infrared astronomy</subject><subject>Infrared emissions</subject><subject>infrared: galaxies</subject><subject>Interstellar radiation</subject><subject>LUMINOSITY</subject><subject>Observatories</subject><subject>Photodissociation</subject><subject>PHOTOLYSIS</subject><subject>Radiation</subject><subject>Sciences of the Universe</subject><subject>Sky surveys (astronomy)</subject><subject>Space telescopes</subject><subject>Star formation</subject><subject>STARS</subject><subject>Stars & galaxies</subject><issn>0004-637X</issn><issn>1538-4357</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2017</creationdate><recordtype>article</recordtype><sourceid>XX2</sourceid><recordid>eNp1kc1LxDAQxYMouH7cPQa8iXUnSdN0j8uirlBQWBe8hTRJ2Ui3WZNW9L-3tbqePAzDDL95vOEhdEHghuWpmBLO8iRlXEyVyokRB2iyXx2iCQCkScbEyzE6ifF1GOlsNkHrOV7aEPXG1tOn-WKF71RIXFMFFazBhWssvt26GJ1v8KoL7_YT-woXXqsaF93WNb6L-OGXv1e1-nA2nqGjStXRnv_0U7S-u31eLJPi8f5hMS8SzSlpE0bozAKjNKeMAU0zagxo2y-NmJGScJuXeSmqVJTKmBTKsjKZISUntBIAGTtFl6Ouj62TUbvW6o32TWN1K3tZwXMieupqpDaqlrvgtip8Sq-cXM4L6ZrYSWCCQEbYO-lhMsI6dloGq23Qqv3G98NQFASVjAMj8GdjF_xbZ2MrX30Xmv5zSVnGBaOcDhT8KAcfY7DV3gsBOWQoh8DkEJgcM-xPrscT53d_mv_iXxaDma0</recordid><startdate>20170901</startdate><enddate>20170901</enddate><creator>Díaz-Santos, T.</creator><creator>Armus, L.</creator><creator>Charmandaris, V.</creator><creator>Lu, N.</creator><creator>Stierwalt, S.</creator><creator>Stacey, G.</creator><creator>Malhotra, S.</creator><creator>Werf, P. P. van der</creator><creator>Howell, J. H.</creator><creator>Privon, G. C.</creator><creator>Mazzarella, J. M.</creator><creator>Goldsmith, P. F.</creator><creator>Murphy, E. J.</creator><creator>Barcos-Muñoz, L.</creator><creator>Linden, S. T.</creator><creator>Inami, H.</creator><creator>Larson, K. L.</creator><creator>Evans, A. S.</creator><creator>Appleton, P.</creator><creator>Iwasawa, K.</creator><creator>Lord, S.</creator><creator>Sanders, D. B.</creator><creator>Surace, J. A.</creator><general>The American Astronomical Society</general><general>IOP Publishing</general><general>Institute of Physics (IOP)</general><general>American Astronomical Society</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7TG</scope><scope>8FD</scope><scope>H8D</scope><scope>KL.</scope><scope>L7M</scope><scope>XX2</scope><scope>1XC</scope><scope>OTOTI</scope><orcidid>https://orcid.org/0000-0003-0057-8892</orcidid><orcidid>https://orcid.org/0000-0002-1000-6081</orcidid><orcidid>https://orcid.org/0000-0002-7607-8766</orcidid><orcidid>https://orcid.org/0000-0003-0699-6083</orcidid><orcidid>https://orcid.org/0000-0001-5434-5942</orcidid><orcidid>https://orcid.org/0000-0002-2596-8531</orcidid><orcidid>https://orcid.org/0000-0002-4923-3281</orcidid><orcidid>https://orcid.org/0000-0002-6622-8396</orcidid><orcidid>https://orcid.org/0000-0002-9226-5350</orcidid><orcidid>https://orcid.org/0000-0001-7089-7325</orcidid><orcidid>https://orcid.org/0000-0002-1233-9998</orcidid><orcidid>https://orcid.org/0000-0001-7291-0087</orcidid><orcidid>https://orcid.org/0000-0002-2688-1956</orcidid><orcidid>https://orcid.org/0000-0002-8948-1044</orcidid><orcidid>https://orcid.org/0000-0003-3474-1125</orcidid></search><sort><creationdate>20170901</creationdate><title>A Herschel/PACS Far-infrared Line Emission Survey of Local Luminous Infrared Galaxies</title><author>Díaz-Santos, T. ; Armus, L. ; Charmandaris, V. ; Lu, N. ; Stierwalt, S. ; Stacey, G. ; Malhotra, S. ; Werf, P. P. van der ; Howell, J. H. ; Privon, G. C. ; Mazzarella, J. M. ; Goldsmith, P. F. ; Murphy, E. J. ; Barcos-Muñoz, L. ; Linden, S. T. ; Inami, H. ; Larson, K. L. ; Evans, A. S. ; Appleton, P. ; Iwasawa, K. ; Lord, S. ; Sanders, D. B. ; Surace, J. A.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c521t-3129e0322823302462dd0ce29ed791b15e8b8b7f47badd40bbfd6d1b512f70063</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2017</creationdate><topic>Astronomia infraroja</topic><topic>Astrophysics</topic><topic>ASTROPHYSICS, COSMOLOGY AND ASTRONOMY</topic><topic>Continuum radiation</topic><topic>DENSITY</topic><topic>DISPERSIONS</topic><topic>DISSOCIATION</topic><topic>DISTRIBUTION</topic><topic>ELECTRON DENSITY</topic><topic>EMISSION</topic><topic>Emission analysis</topic><topic>Evolució de les galàxies</topic><topic>Far infrared radiation</topic><topic>FINE STRUCTURE</topic><topic>GALACTIC EVOLUTION</topic><topic>GALAXIES</topic><topic>Galaxies evolution</topic><topic>galaxies: ISM</topic><topic>galaxies: nuclei</topic><topic>galaxies: starburst</topic><topic>GALAXY NUCLEI</topic><topic>HYDROGEN</topic><topic>Infrared analysis</topic><topic>Infrared astronomy</topic><topic>Infrared emissions</topic><topic>infrared: galaxies</topic><topic>Interstellar radiation</topic><topic>LUMINOSITY</topic><topic>Observatories</topic><topic>Photodissociation</topic><topic>PHOTOLYSIS</topic><topic>Radiation</topic><topic>Sciences of the Universe</topic><topic>Sky surveys (astronomy)</topic><topic>Space telescopes</topic><topic>Star formation</topic><topic>STARS</topic><topic>Stars & galaxies</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Díaz-Santos, T.</creatorcontrib><creatorcontrib>Armus, L.</creatorcontrib><creatorcontrib>Charmandaris, V.</creatorcontrib><creatorcontrib>Lu, N.</creatorcontrib><creatorcontrib>Stierwalt, S.</creatorcontrib><creatorcontrib>Stacey, G.</creatorcontrib><creatorcontrib>Malhotra, S.</creatorcontrib><creatorcontrib>Werf, P. P. van der</creatorcontrib><creatorcontrib>Howell, J. H.</creatorcontrib><creatorcontrib>Privon, G. C.</creatorcontrib><creatorcontrib>Mazzarella, J. M.</creatorcontrib><creatorcontrib>Goldsmith, P. F.</creatorcontrib><creatorcontrib>Murphy, E. J.</creatorcontrib><creatorcontrib>Barcos-Muñoz, L.</creatorcontrib><creatorcontrib>Linden, S. T.</creatorcontrib><creatorcontrib>Inami, H.</creatorcontrib><creatorcontrib>Larson, K. L.</creatorcontrib><creatorcontrib>Evans, A. S.</creatorcontrib><creatorcontrib>Appleton, P.</creatorcontrib><creatorcontrib>Iwasawa, K.</creatorcontrib><creatorcontrib>Lord, S.</creatorcontrib><creatorcontrib>Sanders, D. B.</creatorcontrib><creatorcontrib>Surace, J. A.</creatorcontrib><collection>CrossRef</collection><collection>Meteorological & Geoastrophysical Abstracts</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Meteorological & Geoastrophysical Abstracts - Academic</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>Recercat</collection><collection>Hyper Article en Ligne (HAL)</collection><collection>OSTI.GOV</collection><jtitle>The Astrophysical journal</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>Díaz-Santos, T.</au><au>Armus, L.</au><au>Charmandaris, V.</au><au>Lu, N.</au><au>Stierwalt, S.</au><au>Stacey, G.</au><au>Malhotra, S.</au><au>Werf, P. P. van der</au><au>Howell, J. H.</au><au>Privon, G. C.</au><au>Mazzarella, J. M.</au><au>Goldsmith, P. F.</au><au>Murphy, E. J.</au><au>Barcos-Muñoz, L.</au><au>Linden, S. T.</au><au>Inami, H.</au><au>Larson, K. L.</au><au>Evans, A. S.</au><au>Appleton, P.</au><au>Iwasawa, K.</au><au>Lord, S.</au><au>Sanders, D. B.</au><au>Surace, J. A.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>A Herschel/PACS Far-infrared Line Emission Survey of Local Luminous Infrared Galaxies</atitle><jtitle>The Astrophysical journal</jtitle><stitle>APJ</stitle><addtitle>Astrophys. J</addtitle><date>2017-09-01</date><risdate>2017</risdate><volume>846</volume><issue>1</issue><spage>32</spage><pages>32-</pages><issn>0004-637X</issn><eissn>1538-4357</eissn><abstract>We present an analysis of , [O iii]88, [N ii]122, and far-infrared (FIR) fine-structure line observations obtained with Herschel/PACS, for ∼240 local luminous infrared galaxies (LIRGs) in the Great Observatories All-sky LIRG Survey. We find pronounced declines ("deficits") of line-to-FIR continuum emission for [N ii]122, , and as a function of FIR color and infrared luminosity surface density, . The median electron density of the ionized gas in LIRGs, based on the [N ii]122/[N ii]205 ratio, is = 41 cm−3. We find that the dispersion in the deficit of LIRGs is attributed to a varying fractional contribution of photodissociation regions (PDRs) to the observed emission, f( ) = / , which increases from ∼60% to ∼95% in the warmest LIRGs. The / ratio is tightly correlated with the PDR gas kinetic temperature in sources where is not optically thick or self-absorbed. For each galaxy, we derive the average PDR hydrogen density, , and intensity of the interstellar radiation field, G, in units of and find G/ ratios of ∼0.1-50 cm3, with ULIRGs populating the upper end of the distribution. There is a relation between G/ and , showing a critical break at 5 × 1010 L kpc−2. Below , G/ remains constant, 0.32 cm3, and variations in are driven by the number density of star-forming regions within a galaxy, with no change in their PDR properties. Above , G/ increases rapidly with , signaling a departure from the typical PDR conditions found in normal star-forming galaxies toward more intense/harder radiation fields and compact geometries typical of starbursting sources.</abstract><cop>Philadelphia</cop><pub>The American Astronomical Society</pub><doi>10.3847/1538-4357/aa81d7</doi><tpages>22</tpages><orcidid>https://orcid.org/0000-0003-0057-8892</orcidid><orcidid>https://orcid.org/0000-0002-1000-6081</orcidid><orcidid>https://orcid.org/0000-0002-7607-8766</orcidid><orcidid>https://orcid.org/0000-0003-0699-6083</orcidid><orcidid>https://orcid.org/0000-0001-5434-5942</orcidid><orcidid>https://orcid.org/0000-0002-2596-8531</orcidid><orcidid>https://orcid.org/0000-0002-4923-3281</orcidid><orcidid>https://orcid.org/0000-0002-6622-8396</orcidid><orcidid>https://orcid.org/0000-0002-9226-5350</orcidid><orcidid>https://orcid.org/0000-0001-7089-7325</orcidid><orcidid>https://orcid.org/0000-0002-1233-9998</orcidid><orcidid>https://orcid.org/0000-0001-7291-0087</orcidid><orcidid>https://orcid.org/0000-0002-2688-1956</orcidid><orcidid>https://orcid.org/0000-0002-8948-1044</orcidid><orcidid>https://orcid.org/0000-0003-3474-1125</orcidid><oa>free_for_read</oa></addata></record> |
| fulltext | fulltext_linktorsrc |
| identifier | ISSN: 0004-637X |
| ispartof | The Astrophysical journal, 2017-09, Vol.846 (1), p.32 |
| issn | 0004-637X 1538-4357 |
| language | eng |
| recordid | cdi_iop_journals_10_3847_1538_4357_aa81d7 |
| source | IOP Publishing Free Content |
| subjects | Astronomia infraroja Astrophysics ASTROPHYSICS, COSMOLOGY AND ASTRONOMY Continuum radiation DENSITY DISPERSIONS DISSOCIATION DISTRIBUTION ELECTRON DENSITY EMISSION Emission analysis Evolució de les galàxies Far infrared radiation FINE STRUCTURE GALACTIC EVOLUTION GALAXIES Galaxies evolution galaxies: ISM galaxies: nuclei galaxies: starburst GALAXY NUCLEI HYDROGEN Infrared analysis Infrared astronomy Infrared emissions infrared: galaxies Interstellar radiation LUMINOSITY Observatories Photodissociation PHOTOLYSIS Radiation Sciences of the Universe Sky surveys (astronomy) Space telescopes Star formation STARS Stars & galaxies |
| title | A Herschel/PACS Far-infrared Line Emission Survey of Local Luminous Infrared Galaxies |
| url | https://sfx.bib-bvb.de/sfx_tum?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2025-01-29T22%3A48%3A58IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-proquest_O3W&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.atitle=A%20Herschel/PACS%20Far-infrared%20Line%20Emission%20Survey%20of%20Local%20Luminous%20Infrared%20Galaxies&rft.jtitle=The%20Astrophysical%20journal&rft.au=D%C3%ADaz-Santos,%20T.&rft.date=2017-09-01&rft.volume=846&rft.issue=1&rft.spage=32&rft.pages=32-&rft.issn=0004-637X&rft.eissn=1538-4357&rft_id=info:doi/10.3847/1538-4357/aa81d7&rft_dat=%3Cproquest_O3W%3E2365732520%3C/proquest_O3W%3E%3Curl%3E%3C/url%3E&disable_directlink=true&sfx.directlink=off&sfx.report_link=0&rft_id=info:oai/&rft_pqid=2365732520&rft_id=info:pmid/&rfr_iscdi=true |