ON THE DETECTION OF IONIZING RADIATION ARISING FROM STAR-FORMING GALAXIES AT REDSHIFT z ~ 3-4: LOOKING FOR ANALOGS OF "STELLAR RE-IONIZERS"
We use the spatially resolved, multi-band photometry in the GOODS South field acquired by the CANDELS project to constrain the nature of candidate Lyman continuum (LyC) emitters at redshift z ~ 3.7 identified using ultradeep imaging below the Lyman limit (1[sigma] limit of approximately 30 AB in a 2...
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| Veröffentlicht in: | The Astrophysical journal 2012-05, Vol.751 (1), p.1-14 |
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| container_title | The Astrophysical journal |
| container_volume | 751 |
| creator | VANZELLA, EROS Guo, Yicheng Giavalisco, Mauro Grazian, Andrea Castellano, Marco Cristiani, Stefano Dickinson, Mark Fontana, Adriano Nonino, Mario Giallongo, Emanuele |
| description | We use the spatially resolved, multi-band photometry in the GOODS South field acquired by the CANDELS project to constrain the nature of candidate Lyman continuum (LyC) emitters at redshift z ~ 3.7 identified using ultradeep imaging below the Lyman limit (1[sigma] limit of approximately 30 AB in a 2" diameter aperture). We fit the spectral energy distribution of the LyC candidates to spectral population synthesis models to measure photometric redshifts and the stellar population parameters. We also discuss the differences in the UV colors between the LBG and the LyC candidates, and how to estimate the escape fraction of ionizing radiation (f sub(esc)) in cases, like in most of our galaxies, where the LyC emission is spatially offset from the host galaxy. In all but one case we conclude that the candidate LyC emission is most likely due to lower redshift interlopers. We estimate its f sub(esc) to be in the range 25%-100%, depending on the dust and intergalactic attenuation. |
| doi_str_mv | 10.1088/0004-637X/751/1/70 |
| format | Article |
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We fit the spectral energy distribution of the LyC candidates to spectral population synthesis models to measure photometric redshifts and the stellar population parameters. We also discuss the differences in the UV colors between the LBG and the LyC candidates, and how to estimate the escape fraction of ionizing radiation (f sub(esc)) in cases, like in most of our galaxies, where the LyC emission is spatially offset from the host galaxy. In all but one case we conclude that the candidate LyC emission is most likely due to lower redshift interlopers. We estimate its f sub(esc) to be in the range 25%-100%, depending on the dust and intergalactic attenuation.</description><identifier>ISSN: 0004-637X</identifier><identifier>EISSN: 1538-4357</identifier><identifier>DOI: 10.1088/0004-637X/751/1/70</identifier><language>eng</language><publisher>United States</publisher><subject>ABSORPTION SPECTROSCOPY ; Astronomical models ; ASTROPHYSICS, COSMOLOGY AND ASTRONOMY ; ATTENUATION ; COLOR ; COSMIC DUST ; DETECTION ; DISTANCE ; Emission ; ENERGY SPECTRA ; Estimates ; GALAXIES ; Ionizing radiation ; IONIZING RADIATIONS ; LYMAN LINES ; MASS ; PHOTOMETRY ; PHOTON EMISSION ; RED SHIFT ; Spectral energy distribution ; STARS ; ULTRAVIOLET RADIATION ; ULTRAVIOLET SPECTRA ; VISIBLE RADIATION</subject><ispartof>The Astrophysical journal, 2012-05, Vol.751 (1), p.1-14</ispartof><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>230,314,777,781,882,27905,27906</link.rule.ids><backlink>$$Uhttps://www.osti.gov/biblio/22037215$$D View this record in Osti.gov$$Hfree_for_read</backlink></links><search><creatorcontrib>VANZELLA, EROS</creatorcontrib><creatorcontrib>Guo, Yicheng</creatorcontrib><creatorcontrib>Giavalisco, Mauro</creatorcontrib><creatorcontrib>Grazian, Andrea</creatorcontrib><creatorcontrib>Castellano, Marco</creatorcontrib><creatorcontrib>Cristiani, Stefano</creatorcontrib><creatorcontrib>Dickinson, Mark</creatorcontrib><creatorcontrib>Fontana, Adriano</creatorcontrib><creatorcontrib>Nonino, Mario</creatorcontrib><creatorcontrib>Giallongo, Emanuele</creatorcontrib><title>ON THE DETECTION OF IONIZING RADIATION ARISING FROM STAR-FORMING GALAXIES AT REDSHIFT z ~ 3-4: LOOKING FOR ANALOGS OF "STELLAR RE-IONIZERS"</title><title>The Astrophysical journal</title><description>We use the spatially resolved, multi-band photometry in the GOODS South field acquired by the CANDELS project to constrain the nature of candidate Lyman continuum (LyC) emitters at redshift z ~ 3.7 identified using ultradeep imaging below the Lyman limit (1[sigma] limit of approximately 30 AB in a 2" diameter aperture). We fit the spectral energy distribution of the LyC candidates to spectral population synthesis models to measure photometric redshifts and the stellar population parameters. We also discuss the differences in the UV colors between the LBG and the LyC candidates, and how to estimate the escape fraction of ionizing radiation (f sub(esc)) in cases, like in most of our galaxies, where the LyC emission is spatially offset from the host galaxy. In all but one case we conclude that the candidate LyC emission is most likely due to lower redshift interlopers. We estimate its f sub(esc) to be in the range 25%-100%, depending on the dust and intergalactic attenuation.</description><subject>ABSORPTION SPECTROSCOPY</subject><subject>Astronomical models</subject><subject>ASTROPHYSICS, COSMOLOGY AND ASTRONOMY</subject><subject>ATTENUATION</subject><subject>COLOR</subject><subject>COSMIC DUST</subject><subject>DETECTION</subject><subject>DISTANCE</subject><subject>Emission</subject><subject>ENERGY SPECTRA</subject><subject>Estimates</subject><subject>GALAXIES</subject><subject>Ionizing radiation</subject><subject>IONIZING RADIATIONS</subject><subject>LYMAN LINES</subject><subject>MASS</subject><subject>PHOTOMETRY</subject><subject>PHOTON EMISSION</subject><subject>RED SHIFT</subject><subject>Spectral energy distribution</subject><subject>STARS</subject><subject>ULTRAVIOLET RADIATION</subject><subject>ULTRAVIOLET SPECTRA</subject><subject>VISIBLE RADIATION</subject><issn>0004-637X</issn><issn>1538-4357</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2012</creationdate><recordtype>article</recordtype><recordid>eNqNUL1OwzAYtBBIlMILMFllYTHxX5yEzWqT1iJtJMdIFUuUuK4oKg2QdGHgBXhpkhYxM913p7vvpAPgmuA7gsPQwxhzJFiw9AKfeMQL8AkYEJ-FiDM_OAWDP8M5uGial57SKBqA72wBzSyGk9jEY6M6liWwA_WkFlOo5UTJgyq1ynsl0dkc5kZqlGR63itTmcqlinMoDdTxJJ-pxMBP-AUZ4vcwzbKHQy7TUC5kmk3zvmGUmzhNpe4S6NAW63x0Cc7W5bZxV784BI9JbMYz1KXUWKaoJoK3SLiKRS4KneVW2MoSEa6FWFHCaFX5DluLWSn87gxJB1VFSkfWjFu2ikhVCjYEN8e_ddNuisZuWmefbb3bOdsWlGIW0G66Ibg9ut4-6ve9a9riddNYt92WO1fvm4IEJIwY5zz4hxUTHnEaUvYD87N1hw</recordid><startdate>20120520</startdate><enddate>20120520</enddate><creator>VANZELLA, EROS</creator><creator>Guo, Yicheng</creator><creator>Giavalisco, Mauro</creator><creator>Grazian, Andrea</creator><creator>Castellano, Marco</creator><creator>Cristiani, Stefano</creator><creator>Dickinson, Mark</creator><creator>Fontana, Adriano</creator><creator>Nonino, Mario</creator><creator>Giallongo, Emanuele</creator><scope>7TG</scope><scope>KL.</scope><scope>8FD</scope><scope>H8D</scope><scope>L7M</scope><scope>OTOTI</scope></search><sort><creationdate>20120520</creationdate><title>ON THE DETECTION OF IONIZING RADIATION ARISING FROM STAR-FORMING GALAXIES AT REDSHIFT z ~ 3-4: LOOKING FOR ANALOGS OF "STELLAR RE-IONIZERS"</title><author>VANZELLA, EROS ; Guo, Yicheng ; Giavalisco, Mauro ; Grazian, Andrea ; Castellano, Marco ; Cristiani, Stefano ; Dickinson, Mark ; Fontana, Adriano ; Nonino, Mario ; Giallongo, Emanuele</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-o164t-6eb39e98ec4c6cbc168f66d2132bb5e0cc03a65b5e8165bbb1ae1f34c3d91ba63</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2012</creationdate><topic>ABSORPTION SPECTROSCOPY</topic><topic>Astronomical models</topic><topic>ASTROPHYSICS, COSMOLOGY AND ASTRONOMY</topic><topic>ATTENUATION</topic><topic>COLOR</topic><topic>COSMIC DUST</topic><topic>DETECTION</topic><topic>DISTANCE</topic><topic>Emission</topic><topic>ENERGY SPECTRA</topic><topic>Estimates</topic><topic>GALAXIES</topic><topic>Ionizing radiation</topic><topic>IONIZING RADIATIONS</topic><topic>LYMAN LINES</topic><topic>MASS</topic><topic>PHOTOMETRY</topic><topic>PHOTON EMISSION</topic><topic>RED SHIFT</topic><topic>Spectral energy distribution</topic><topic>STARS</topic><topic>ULTRAVIOLET RADIATION</topic><topic>ULTRAVIOLET SPECTRA</topic><topic>VISIBLE RADIATION</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>VANZELLA, EROS</creatorcontrib><creatorcontrib>Guo, Yicheng</creatorcontrib><creatorcontrib>Giavalisco, Mauro</creatorcontrib><creatorcontrib>Grazian, Andrea</creatorcontrib><creatorcontrib>Castellano, Marco</creatorcontrib><creatorcontrib>Cristiani, Stefano</creatorcontrib><creatorcontrib>Dickinson, Mark</creatorcontrib><creatorcontrib>Fontana, Adriano</creatorcontrib><creatorcontrib>Nonino, Mario</creatorcontrib><creatorcontrib>Giallongo, Emanuele</creatorcontrib><collection>Meteorological & Geoastrophysical Abstracts</collection><collection>Meteorological & Geoastrophysical Abstracts - Academic</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>OSTI.GOV</collection><jtitle>The Astrophysical journal</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>VANZELLA, EROS</au><au>Guo, Yicheng</au><au>Giavalisco, Mauro</au><au>Grazian, Andrea</au><au>Castellano, Marco</au><au>Cristiani, Stefano</au><au>Dickinson, Mark</au><au>Fontana, Adriano</au><au>Nonino, Mario</au><au>Giallongo, Emanuele</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>ON THE DETECTION OF IONIZING RADIATION ARISING FROM STAR-FORMING GALAXIES AT REDSHIFT z ~ 3-4: LOOKING FOR ANALOGS OF "STELLAR RE-IONIZERS"</atitle><jtitle>The Astrophysical journal</jtitle><date>2012-05-20</date><risdate>2012</risdate><volume>751</volume><issue>1</issue><spage>1</spage><epage>14</epage><pages>1-14</pages><issn>0004-637X</issn><eissn>1538-4357</eissn><abstract>We use the spatially resolved, multi-band photometry in the GOODS South field acquired by the CANDELS project to constrain the nature of candidate Lyman continuum (LyC) emitters at redshift z ~ 3.7 identified using ultradeep imaging below the Lyman limit (1[sigma] limit of approximately 30 AB in a 2" diameter aperture). We fit the spectral energy distribution of the LyC candidates to spectral population synthesis models to measure photometric redshifts and the stellar population parameters. We also discuss the differences in the UV colors between the LBG and the LyC candidates, and how to estimate the escape fraction of ionizing radiation (f sub(esc)) in cases, like in most of our galaxies, where the LyC emission is spatially offset from the host galaxy. In all but one case we conclude that the candidate LyC emission is most likely due to lower redshift interlopers. We estimate its f sub(esc) to be in the range 25%-100%, depending on the dust and intergalactic attenuation.</abstract><cop>United States</cop><doi>10.1088/0004-637X/751/1/70</doi><tpages>14</tpages></addata></record> |
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| subjects | ABSORPTION SPECTROSCOPY Astronomical models ASTROPHYSICS, COSMOLOGY AND ASTRONOMY ATTENUATION COLOR COSMIC DUST DETECTION DISTANCE Emission ENERGY SPECTRA Estimates GALAXIES Ionizing radiation IONIZING RADIATIONS LYMAN LINES MASS PHOTOMETRY PHOTON EMISSION RED SHIFT Spectral energy distribution STARS ULTRAVIOLET RADIATION ULTRAVIOLET SPECTRA VISIBLE RADIATION |
| title | ON THE DETECTION OF IONIZING RADIATION ARISING FROM STAR-FORMING GALAXIES AT REDSHIFT z ~ 3-4: LOOKING FOR ANALOGS OF "STELLAR RE-IONIZERS" |
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