SQuIGG E Survey: Massive z ∼ 0.6 Post-starburst Galaxies Exhibit Flat Age Gradients
We present Gemini Multi-Object Spectrograph (GMOS) integral field unit (IFU) observations of six massive ( M ⋆ ≥ 10 11 M ⊙ ) A-star dominated post-starburst galaxies at z ∼ 0.6. These galaxies are a subsample of the Survey, which selects intermediate-redshift post-starbursts from the Sloan Digita...
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| Veröffentlicht in: | The Astrophysical journal 2020-12, Vol.905 (1), p.79 |
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| creator | Setton, David J. Bezanson, Rachel Suess, Katherine A. Hunt, Qiana Greene, Jenny E. Kriek, Mariska Spilker, Justin S. Feldmann, Robert Narayanan, Desika |
| description | We present Gemini Multi-Object Spectrograph (GMOS) integral field unit (IFU) observations of six massive (
M
⋆
≥ 10
11
M
⊙
) A-star dominated post-starburst galaxies at
z
∼ 0.6. These galaxies are a subsample of the
Survey, which selects intermediate-redshift post-starbursts from the Sloan Digital Sky Survey spectroscopic sample (DR14) with spectral shapes that indicate they have recently shut off their primary epoch of star formation. Using
Hδ
A
absorption as a proxy for stellar age, we constrain five of the galaxies to have young (∼600 Myr) light-weighted ages at all radii and find that the sample on average has flat age gradients. We examine the spatial distribution of mass-weighted properties by fitting our profiles with a toy model including a young, centrally concentrated burst superimposed on an older, extended population. We find that galaxies with flat
Hδ
A
profiles are inconsistent with formation via a central secondary starburst. This implies that the mechanism responsible for shutting off this dominant episode of star formation must have done so uniformly throughout the galaxy. |
| doi_str_mv | 10.3847/1538-4357/abc265 |
| format | Article |
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M
⋆
≥ 10
11
M
⊙
) A-star dominated post-starburst galaxies at
z
∼ 0.6. These galaxies are a subsample of the
Survey, which selects intermediate-redshift post-starbursts from the Sloan Digital Sky Survey spectroscopic sample (DR14) with spectral shapes that indicate they have recently shut off their primary epoch of star formation. Using
Hδ
A
absorption as a proxy for stellar age, we constrain five of the galaxies to have young (∼600 Myr) light-weighted ages at all radii and find that the sample on average has flat age gradients. We examine the spatial distribution of mass-weighted properties by fitting our profiles with a toy model including a young, centrally concentrated burst superimposed on an older, extended population. We find that galaxies with flat
Hδ
A
profiles are inconsistent with formation via a central secondary starburst. This implies that the mechanism responsible for shutting off this dominant episode of star formation must have done so uniformly throughout the galaxy.</description><identifier>ISSN: 0004-637X</identifier><identifier>EISSN: 1538-4357</identifier><identifier>DOI: 10.3847/1538-4357/abc265</identifier><language>eng</language><publisher>Philadelphia: The American Astronomical Society</publisher><subject>Astrophysics ; Galaxies ; Galaxy evolution ; Galaxy formation ; Galaxy quenching ; Red shift ; Sky surveys (astronomy) ; Spatial distribution ; Star & galaxy formation ; Star formation ; Starburst galaxies ; Starbursts ; Stars & galaxies ; Stellar age</subject><ispartof>The Astrophysical journal, 2020-12, Vol.905 (1), p.79</ispartof><rights>2020. The American Astronomical Society. All rights reserved.</rights><rights>Copyright IOP Publishing Dec 01, 2020</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c1955-b558e5c962fd5da363882ed869bd7b576ed15fc6eb2e5ba16e6890f2797b0c4b3</citedby><cites>FETCH-LOGICAL-c1955-b558e5c962fd5da363882ed869bd7b576ed15fc6eb2e5ba16e6890f2797b0c4b3</cites><orcidid>0000-0003-4075-7393 ; 0000-0003-3256-5615 ; 0000-0002-7064-4309 ; 0000-0001-5063-8254 ; 0000-0002-7613-9872 ; 0000-0002-1109-1919 ; 0000-0002-1714-1905 ; 0000-0002-4669-0209</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/abc265/pdf$$EPDF$$P50$$Giop$$H</linktopdf><link.rule.ids>314,776,780,27901,27902,38867,53842</link.rule.ids><linktorsrc>$$Uhttps://iopscience.iop.org/article/10.3847/1538-4357/abc265$$EView_record_in_IOP_Publishing$$FView_record_in_$$GIOP_Publishing</linktorsrc></links><search><creatorcontrib>Setton, David J.</creatorcontrib><creatorcontrib>Bezanson, Rachel</creatorcontrib><creatorcontrib>Suess, Katherine A.</creatorcontrib><creatorcontrib>Hunt, Qiana</creatorcontrib><creatorcontrib>Greene, Jenny E.</creatorcontrib><creatorcontrib>Kriek, Mariska</creatorcontrib><creatorcontrib>Spilker, Justin S.</creatorcontrib><creatorcontrib>Feldmann, Robert</creatorcontrib><creatorcontrib>Narayanan, Desika</creatorcontrib><title>SQuIGG E Survey: Massive z ∼ 0.6 Post-starburst Galaxies Exhibit Flat Age Gradients</title><title>The Astrophysical journal</title><addtitle>APJ</addtitle><addtitle>Astrophys. J</addtitle><description>We present Gemini Multi-Object Spectrograph (GMOS) integral field unit (IFU) observations of six massive (
M
⋆
≥ 10
11
M
⊙
) A-star dominated post-starburst galaxies at
z
∼ 0.6. These galaxies are a subsample of the
Survey, which selects intermediate-redshift post-starbursts from the Sloan Digital Sky Survey spectroscopic sample (DR14) with spectral shapes that indicate they have recently shut off their primary epoch of star formation. Using
Hδ
A
absorption as a proxy for stellar age, we constrain five of the galaxies to have young (∼600 Myr) light-weighted ages at all radii and find that the sample on average has flat age gradients. We examine the spatial distribution of mass-weighted properties by fitting our profiles with a toy model including a young, centrally concentrated burst superimposed on an older, extended population. We find that galaxies with flat
Hδ
A
profiles are inconsistent with formation via a central secondary starburst. This implies that the mechanism responsible for shutting off this dominant episode of star formation must have done so uniformly throughout the galaxy.</description><subject>Astrophysics</subject><subject>Galaxies</subject><subject>Galaxy evolution</subject><subject>Galaxy formation</subject><subject>Galaxy quenching</subject><subject>Red shift</subject><subject>Sky surveys (astronomy)</subject><subject>Spatial distribution</subject><subject>Star & galaxy formation</subject><subject>Star formation</subject><subject>Starburst galaxies</subject><subject>Starbursts</subject><subject>Stars & galaxies</subject><subject>Stellar age</subject><issn>0004-637X</issn><issn>1538-4357</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2020</creationdate><recordtype>article</recordtype><recordid>eNp1kE1OwzAQhS0EEqWwZ2mJLWkdO_5jV6E2VCoCVBDsLDtxIFVpip1ULSfgGD0Iqx6Fk5AoCFasRjN6743eB8BpiHpERLwfUiKCiFDe1ybBjO6Bzu9pH3QQQlHACH86BEfez5oVS9kBj9O7ahzHcAinlVvZzQW81t7nKwvfd9uvj8_dFvUYvC18GfhSO1M5X8JYz_U6tx4O1y-5yUs4musSDp4tjJ1Oc7so_TE4yPTc25Of2QUPo-H95VUwuYnHl4NJkISS0sBQKixNJMNZSlNNGBEC21QwaVJuKGc2DWmWMGuwpUaHzDIhUYa55AYlkSFdcNbmLl3xVllfqllRuUX9UuGI1y0lFaxWoVaVuMJ7ZzO1dPmrdhsVItXgUw0r1bBSLb7act5a8mL5l_mv_BuU-XHm</recordid><startdate>20201201</startdate><enddate>20201201</enddate><creator>Setton, David J.</creator><creator>Bezanson, Rachel</creator><creator>Suess, Katherine A.</creator><creator>Hunt, Qiana</creator><creator>Greene, Jenny E.</creator><creator>Kriek, Mariska</creator><creator>Spilker, Justin S.</creator><creator>Feldmann, Robert</creator><creator>Narayanan, Desika</creator><general>The American Astronomical Society</general><general>IOP Publishing</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7TG</scope><scope>8FD</scope><scope>H8D</scope><scope>KL.</scope><scope>L7M</scope><orcidid>https://orcid.org/0000-0003-4075-7393</orcidid><orcidid>https://orcid.org/0000-0003-3256-5615</orcidid><orcidid>https://orcid.org/0000-0002-7064-4309</orcidid><orcidid>https://orcid.org/0000-0001-5063-8254</orcidid><orcidid>https://orcid.org/0000-0002-7613-9872</orcidid><orcidid>https://orcid.org/0000-0002-1109-1919</orcidid><orcidid>https://orcid.org/0000-0002-1714-1905</orcidid><orcidid>https://orcid.org/0000-0002-4669-0209</orcidid></search><sort><creationdate>20201201</creationdate><title>SQuIGG E Survey: Massive z ∼ 0.6 Post-starburst Galaxies Exhibit Flat Age Gradients</title><author>Setton, David J. ; Bezanson, Rachel ; Suess, Katherine A. ; Hunt, Qiana ; Greene, Jenny E. ; Kriek, Mariska ; Spilker, Justin S. ; Feldmann, Robert ; Narayanan, Desika</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c1955-b558e5c962fd5da363882ed869bd7b576ed15fc6eb2e5ba16e6890f2797b0c4b3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2020</creationdate><topic>Astrophysics</topic><topic>Galaxies</topic><topic>Galaxy evolution</topic><topic>Galaxy formation</topic><topic>Galaxy quenching</topic><topic>Red shift</topic><topic>Sky surveys (astronomy)</topic><topic>Spatial distribution</topic><topic>Star & galaxy formation</topic><topic>Star formation</topic><topic>Starburst galaxies</topic><topic>Starbursts</topic><topic>Stars & galaxies</topic><topic>Stellar age</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Setton, David J.</creatorcontrib><creatorcontrib>Bezanson, Rachel</creatorcontrib><creatorcontrib>Suess, Katherine A.</creatorcontrib><creatorcontrib>Hunt, Qiana</creatorcontrib><creatorcontrib>Greene, Jenny E.</creatorcontrib><creatorcontrib>Kriek, Mariska</creatorcontrib><creatorcontrib>Spilker, Justin S.</creatorcontrib><creatorcontrib>Feldmann, Robert</creatorcontrib><creatorcontrib>Narayanan, Desika</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><jtitle>The Astrophysical journal</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>Setton, David J.</au><au>Bezanson, Rachel</au><au>Suess, Katherine A.</au><au>Hunt, Qiana</au><au>Greene, Jenny E.</au><au>Kriek, Mariska</au><au>Spilker, Justin S.</au><au>Feldmann, Robert</au><au>Narayanan, Desika</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>SQuIGG E Survey: Massive z ∼ 0.6 Post-starburst Galaxies Exhibit Flat Age Gradients</atitle><jtitle>The Astrophysical journal</jtitle><stitle>APJ</stitle><addtitle>Astrophys. 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M
⋆
≥ 10
11
M
⊙
) A-star dominated post-starburst galaxies at
z
∼ 0.6. These galaxies are a subsample of the
Survey, which selects intermediate-redshift post-starbursts from the Sloan Digital Sky Survey spectroscopic sample (DR14) with spectral shapes that indicate they have recently shut off their primary epoch of star formation. Using
Hδ
A
absorption as a proxy for stellar age, we constrain five of the galaxies to have young (∼600 Myr) light-weighted ages at all radii and find that the sample on average has flat age gradients. We examine the spatial distribution of mass-weighted properties by fitting our profiles with a toy model including a young, centrally concentrated burst superimposed on an older, extended population. We find that galaxies with flat
Hδ
A
profiles are inconsistent with formation via a central secondary starburst. This implies that the mechanism responsible for shutting off this dominant episode of star formation must have done so uniformly throughout the galaxy.</abstract><cop>Philadelphia</cop><pub>The American Astronomical Society</pub><doi>10.3847/1538-4357/abc265</doi><tpages>15</tpages><orcidid>https://orcid.org/0000-0003-4075-7393</orcidid><orcidid>https://orcid.org/0000-0003-3256-5615</orcidid><orcidid>https://orcid.org/0000-0002-7064-4309</orcidid><orcidid>https://orcid.org/0000-0001-5063-8254</orcidid><orcidid>https://orcid.org/0000-0002-7613-9872</orcidid><orcidid>https://orcid.org/0000-0002-1109-1919</orcidid><orcidid>https://orcid.org/0000-0002-1714-1905</orcidid><orcidid>https://orcid.org/0000-0002-4669-0209</orcidid><oa>free_for_read</oa></addata></record> |
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| issn | 0004-637X 1538-4357 |
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| source | IOP Publishing Free Content |
| subjects | Astrophysics Galaxies Galaxy evolution Galaxy formation Galaxy quenching Red shift Sky surveys (astronomy) Spatial distribution Star & galaxy formation Star formation Starburst galaxies Starbursts Stars & galaxies Stellar age |
| title | SQuIGG E Survey: Massive z ∼ 0.6 Post-starburst Galaxies Exhibit Flat Age Gradients |
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