The Intrinsic Shapes of Low Surface Brightness Galaxies (LSBGs): A Discriminant of LSBG Galaxy Formation Mechanisms
We use the low surface brightness galaxy (LSBG) samples created from the Hyper Suprime-Cam Subaru Strategic Program (781 galaxies), the Dark Energy Survey (20977 galaxies), and the Legacy Survey (selected via H i detection in the Arecibo Legacy Fast ALFA Survey, 188 galaxies) to infer the intrinsic...
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| Veröffentlicht in: | The Astrophysical journal 2021-10, Vol.920 (2), p.72 |
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| creator | Kado-Fong, Erin Petrescu, Mihai Mohammad, Majid Greco, Johnny Greene, Jenny E. Adams, Elizabeth A. K. Huang, Song Leisman, Lukas Munshi, Ferah Tanoglidis, Dimitrios Van Nest, Jordan |
| description | We use the low surface brightness galaxy (LSBG) samples created from the Hyper Suprime-Cam Subaru Strategic Program (781 galaxies), the Dark Energy Survey (20977 galaxies), and the Legacy Survey (selected via H
i
detection in the Arecibo Legacy Fast ALFA Survey, 188 galaxies) to infer the intrinsic shape distribution of the LSBG population. To take into account the effect of the surface brightness cuts employed when constructing LSBG samples, we simultaneously model both the projected ellipticity and the apparent surface brightness in our shape inference. We find that the LSBG samples are well characterized by oblate spheroids, with no significant difference between red and blue LSBGs. This inferred shape distribution is in good agreement with similar inferences made for ultra-diffuse cluster galaxy samples, indicating that environment does not play a key role in determining the intrinsic shape of LSBGs. We also find some evidence that LSBGs are more thickened than similarly massive high surface brightness dwarfs. We compare our results to intrinsic shape measures from contemporary cosmological simulations, and find that the observed LSBG intrinsic shapes place considerable constraints on the formation path of such galaxies. In particular, LSBG production via the migration of star formation to large radii produces intrinsic shapes in good agreement with our observational findings. |
| doi_str_mv | 10.3847/1538-4357/ac15f0 |
| format | Article |
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i
detection in the Arecibo Legacy Fast ALFA Survey, 188 galaxies) to infer the intrinsic shape distribution of the LSBG population. To take into account the effect of the surface brightness cuts employed when constructing LSBG samples, we simultaneously model both the projected ellipticity and the apparent surface brightness in our shape inference. We find that the LSBG samples are well characterized by oblate spheroids, with no significant difference between red and blue LSBGs. This inferred shape distribution is in good agreement with similar inferences made for ultra-diffuse cluster galaxy samples, indicating that environment does not play a key role in determining the intrinsic shape of LSBGs. We also find some evidence that LSBGs are more thickened than similarly massive high surface brightness dwarfs. We compare our results to intrinsic shape measures from contemporary cosmological simulations, and find that the observed LSBG intrinsic shapes place considerable constraints on the formation path of such galaxies. In particular, LSBG production via the migration of star formation to large radii produces intrinsic shapes in good agreement with our observational findings.</description><identifier>ISSN: 0004-637X</identifier><identifier>EISSN: 1538-4357</identifier><identifier>DOI: 10.3847/1538-4357/ac15f0</identifier><language>eng</language><publisher>Philadelphia: The American Astronomical Society</publisher><subject>Accuracy ; Astronomical methods ; ASTRONOMY AND ASTROPHYSICS ; Astrophysics ; Dark energy ; Dwarf galaxies ; Ellipticity ; Galactic evolution ; Galaxies ; Galaxy distribution ; Galaxy structure ; Low surface brightness galaxies ; Oblate spheroids ; Observational astronomy ; Sky surveys (astronomy) ; Star & galaxy formation ; Star formation ; Stars & galaxies ; Surface brightness</subject><ispartof>The Astrophysical journal, 2021-10, Vol.920 (2), p.72</ispartof><rights>2021. The American Astronomical Society. All rights reserved.</rights><rights>Copyright IOP Publishing Oct 01, 2021</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c443t-70a766c583fdd14330d0c7e59aad9256fd0e7c1e5ad8b57cd9caa7112d0de7a63</citedby><cites>FETCH-LOGICAL-c443t-70a766c583fdd14330d0c7e59aad9256fd0e7c1e5ad8b57cd9caa7112d0de7a63</cites><orcidid>0000-0002-0332-177X ; 0000-0002-5612-3427 ; 0000-0001-8849-7987 ; 0000-0003-4970-2874 ; 0000-0003-1385-7591 ; 0000-0002-9798-5111 ; 0000-0002-9581-0297 ; 0000-0001-9125-3297 ; 0000000188497987 ; 0000000191253297 ; 0000000256123427 ; 0000000297985111 ; 0000000349702874 ; 0000000313857591 ; 000000020332177X ; 0000000295810297</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/ac15f0/pdf$$EPDF$$P50$$Giop$$H</linktopdf><link.rule.ids>230,314,776,780,881,27901,27902,38867,53842</link.rule.ids><linktorsrc>$$Uhttps://iopscience.iop.org/article/10.3847/1538-4357/ac15f0$$EView_record_in_IOP_Publishing$$FView_record_in_$$GIOP_Publishing</linktorsrc><backlink>$$Uhttps://www.osti.gov/servlets/purl/1983180$$D View this record in Osti.gov$$Hfree_for_read</backlink></links><search><creatorcontrib>Kado-Fong, Erin</creatorcontrib><creatorcontrib>Petrescu, Mihai</creatorcontrib><creatorcontrib>Mohammad, Majid</creatorcontrib><creatorcontrib>Greco, Johnny</creatorcontrib><creatorcontrib>Greene, Jenny E.</creatorcontrib><creatorcontrib>Adams, Elizabeth A. K.</creatorcontrib><creatorcontrib>Huang, Song</creatorcontrib><creatorcontrib>Leisman, Lukas</creatorcontrib><creatorcontrib>Munshi, Ferah</creatorcontrib><creatorcontrib>Tanoglidis, Dimitrios</creatorcontrib><creatorcontrib>Van Nest, Jordan</creatorcontrib><creatorcontrib>SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)</creatorcontrib><creatorcontrib>Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)</creatorcontrib><creatorcontrib>Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC)</creatorcontrib><title>The Intrinsic Shapes of Low Surface Brightness Galaxies (LSBGs): A Discriminant of LSBG Galaxy Formation Mechanisms</title><title>The Astrophysical journal</title><addtitle>APJ</addtitle><addtitle>Astrophys. J</addtitle><description>We use the low surface brightness galaxy (LSBG) samples created from the Hyper Suprime-Cam Subaru Strategic Program (781 galaxies), the Dark Energy Survey (20977 galaxies), and the Legacy Survey (selected via H
i
detection in the Arecibo Legacy Fast ALFA Survey, 188 galaxies) to infer the intrinsic shape distribution of the LSBG population. To take into account the effect of the surface brightness cuts employed when constructing LSBG samples, we simultaneously model both the projected ellipticity and the apparent surface brightness in our shape inference. We find that the LSBG samples are well characterized by oblate spheroids, with no significant difference between red and blue LSBGs. This inferred shape distribution is in good agreement with similar inferences made for ultra-diffuse cluster galaxy samples, indicating that environment does not play a key role in determining the intrinsic shape of LSBGs. We also find some evidence that LSBGs are more thickened than similarly massive high surface brightness dwarfs. We compare our results to intrinsic shape measures from contemporary cosmological simulations, and find that the observed LSBG intrinsic shapes place considerable constraints on the formation path of such galaxies. In particular, LSBG production via the migration of star formation to large radii produces intrinsic shapes in good agreement with our observational findings.</description><subject>Accuracy</subject><subject>Astronomical methods</subject><subject>ASTRONOMY AND ASTROPHYSICS</subject><subject>Astrophysics</subject><subject>Dark energy</subject><subject>Dwarf galaxies</subject><subject>Ellipticity</subject><subject>Galactic evolution</subject><subject>Galaxies</subject><subject>Galaxy distribution</subject><subject>Galaxy structure</subject><subject>Low surface brightness galaxies</subject><subject>Oblate spheroids</subject><subject>Observational astronomy</subject><subject>Sky surveys (astronomy)</subject><subject>Star & galaxy formation</subject><subject>Star formation</subject><subject>Stars & galaxies</subject><subject>Surface brightness</subject><issn>0004-637X</issn><issn>1538-4357</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2021</creationdate><recordtype>article</recordtype><recordid>eNp1kMtLAzEQxoMoWB93j0EvCq4mze5m15vPKlQ8VMFbGJOsjdikZlLU_97UFT15Gmbm983jI2SHsyPRlPKYV6IpSlHJY9C86tgKGfyWVsmAMVYWtZCP62QD8WWZDtt2QPB-aumNT9F5dJpOpjC3SENHx-GdThaxA23pWXTP0-QtIh3BK3y4jOyPJ2cjPDihp_TCoY5u5jz49C3NnR78pFchziC54Omt1VPwDme4RdY6eEW7_RM3ycPV5f35dTG-G92cn44LXZYiFZKBrGtdNaIzhpdCMMO0tFULYNphVXeGWam5rcA0T5XUptUAkvOhYcZKqMUm2e3nBkxOoXYpn6CD91YnxdtG8IZlaK-H5jG8LSwm9RIW0ee71DCv5qxupMwU6ykdA2K0nZrnjyF-Ks7U0n-1NFstzVa9_1ly2EtcmP_N_Bf_AsvUhbg</recordid><startdate>20211001</startdate><enddate>20211001</enddate><creator>Kado-Fong, Erin</creator><creator>Petrescu, Mihai</creator><creator>Mohammad, Majid</creator><creator>Greco, Johnny</creator><creator>Greene, Jenny E.</creator><creator>Adams, Elizabeth A. 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K.</au><au>Huang, Song</au><au>Leisman, Lukas</au><au>Munshi, Ferah</au><au>Tanoglidis, Dimitrios</au><au>Van Nest, Jordan</au><aucorp>SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)</aucorp><aucorp>Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)</aucorp><aucorp>Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC)</aucorp><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>The Intrinsic Shapes of Low Surface Brightness Galaxies (LSBGs): A Discriminant of LSBG Galaxy Formation Mechanisms</atitle><jtitle>The Astrophysical journal</jtitle><stitle>APJ</stitle><addtitle>Astrophys. J</addtitle><date>2021-10-01</date><risdate>2021</risdate><volume>920</volume><issue>2</issue><spage>72</spage><pages>72-</pages><issn>0004-637X</issn><eissn>1538-4357</eissn><abstract>We use the low surface brightness galaxy (LSBG) samples created from the Hyper Suprime-Cam Subaru Strategic Program (781 galaxies), the Dark Energy Survey (20977 galaxies), and the Legacy Survey (selected via H
i
detection in the Arecibo Legacy Fast ALFA Survey, 188 galaxies) to infer the intrinsic shape distribution of the LSBG population. To take into account the effect of the surface brightness cuts employed when constructing LSBG samples, we simultaneously model both the projected ellipticity and the apparent surface brightness in our shape inference. We find that the LSBG samples are well characterized by oblate spheroids, with no significant difference between red and blue LSBGs. This inferred shape distribution is in good agreement with similar inferences made for ultra-diffuse cluster galaxy samples, indicating that environment does not play a key role in determining the intrinsic shape of LSBGs. We also find some evidence that LSBGs are more thickened than similarly massive high surface brightness dwarfs. We compare our results to intrinsic shape measures from contemporary cosmological simulations, and find that the observed LSBG intrinsic shapes place considerable constraints on the formation path of such galaxies. In particular, LSBG production via the migration of star formation to large radii produces intrinsic shapes in good agreement with our observational findings.</abstract><cop>Philadelphia</cop><pub>The American Astronomical Society</pub><doi>10.3847/1538-4357/ac15f0</doi><tpages>15</tpages><orcidid>https://orcid.org/0000-0002-0332-177X</orcidid><orcidid>https://orcid.org/0000-0002-5612-3427</orcidid><orcidid>https://orcid.org/0000-0001-8849-7987</orcidid><orcidid>https://orcid.org/0000-0003-4970-2874</orcidid><orcidid>https://orcid.org/0000-0003-1385-7591</orcidid><orcidid>https://orcid.org/0000-0002-9798-5111</orcidid><orcidid>https://orcid.org/0000-0002-9581-0297</orcidid><orcidid>https://orcid.org/0000-0001-9125-3297</orcidid><orcidid>https://orcid.org/0000000188497987</orcidid><orcidid>https://orcid.org/0000000191253297</orcidid><orcidid>https://orcid.org/0000000256123427</orcidid><orcidid>https://orcid.org/0000000297985111</orcidid><orcidid>https://orcid.org/0000000349702874</orcidid><orcidid>https://orcid.org/0000000313857591</orcidid><orcidid>https://orcid.org/000000020332177X</orcidid><orcidid>https://orcid.org/0000000295810297</orcidid><oa>free_for_read</oa></addata></record> |
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| ispartof | The Astrophysical journal, 2021-10, Vol.920 (2), p.72 |
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| subjects | Accuracy Astronomical methods ASTRONOMY AND ASTROPHYSICS Astrophysics Dark energy Dwarf galaxies Ellipticity Galactic evolution Galaxies Galaxy distribution Galaxy structure Low surface brightness galaxies Oblate spheroids Observational astronomy Sky surveys (astronomy) Star & galaxy formation Star formation Stars & galaxies Surface brightness |
| title | The Intrinsic Shapes of Low Surface Brightness Galaxies (LSBGs): A Discriminant of LSBG Galaxy Formation Mechanisms |
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