E-INSPIRE -- I. Bridging the gap with the local Universe: Stellar population of a statistical sample of ultra-compact massive galaxies at $z<0.3
This paper presents the first effort to Extend the Investigation of Stellar Populations In RElics (E-INSPIRE). We present a catalogue of 430 spectroscopically-confirmed ultra-compact massive galaxies (UCMGs) from the Sloan Digital Sky Survey at redshifts $0.01
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| creator | Mills, John Spiniello, Chiara Sergeyev, Alexey Tortora, Crescenzo Khramtsov, Vladyslav D'Ago, Giuseppe Maksymowicz-Maciata, Michalina Benedetti, João P. V Ferré-Mateu, Anna Cappellari, Michele Davies, Roger Hartke, Johanna Rosen, Charles |
| description | This paper presents the first effort to Extend the Investigation of Stellar
Populations In RElics (E-INSPIRE). We present a catalogue of 430
spectroscopically-confirmed ultra-compact massive galaxies (UCMGs) from the
Sloan Digital Sky Survey at redshifts $0.01 |
| doi_str_mv | 10.48550/arxiv.2501.16126 |
| format | Article |
| fullrecord | <record><control><sourceid>arxiv_GOX</sourceid><recordid>TN_cdi_arxiv_primary_2501_16126</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sourcerecordid>2501_16126</sourcerecordid><originalsourceid>FETCH-arxiv_primary_2501_161263</originalsourceid><addsrcrecordid>eNqFT7tuwkAQvIYiAj4gVbagvcOGGCFEBXIUN1EUktpamcOstPad7hZC8hX55NhW-lSjGY3modR9mpjHdZYlcww3uppFlqQmXaWL1Z36yXXxcngt3nLQGgoDu0DHmtoa5GyhRg-fJOeBsKuQ4aOlqw3RbuAglhkDeOcvjEKuBXcChCgdiUK9O2Lj2fb6hSWgrlzjsRJoMMYupytgvJGNgAKz721ilhM1OiFHO_3DsXp4yt_3z3rYXvpADYavsv9QDh-W_zt-Ab7xUVE</addsrcrecordid><sourcetype>Open Access Repository</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype></control><display><type>article</type><title>E-INSPIRE -- I. Bridging the gap with the local Universe: Stellar population of a statistical sample of ultra-compact massive galaxies at $z<0.3</title><source>arXiv.org</source><creator>Mills, John ; Spiniello, Chiara ; Sergeyev, Alexey ; Tortora, Crescenzo ; Khramtsov, Vladyslav ; D'Ago, Giuseppe ; Maksymowicz-Maciata, Michalina ; Benedetti, João P. V ; Ferré-Mateu, Anna ; Cappellari, Michele ; Davies, Roger ; Hartke, Johanna ; Rosen, Charles</creator><creatorcontrib>Mills, John ; Spiniello, Chiara ; Sergeyev, Alexey ; Tortora, Crescenzo ; Khramtsov, Vladyslav ; D'Ago, Giuseppe ; Maksymowicz-Maciata, Michalina ; Benedetti, João P. V ; Ferré-Mateu, Anna ; Cappellari, Michele ; Davies, Roger ; Hartke, Johanna ; Rosen, Charles</creatorcontrib><description>This paper presents the first effort to Extend the Investigation of Stellar
Populations In RElics (E-INSPIRE). We present a catalogue of 430
spectroscopically-confirmed ultra-compact massive galaxies (UCMGs) from the
Sloan Digital Sky Survey at redshifts $0.01<z<0.3$. This increases the original
INSPIRE sample eightfold, bridging the gap with the local Universe. For each
object, we compute integrated stellar velocity dispersion, age, metallicity,
and [Mg/Fe] through spectroscopic stellar population analysis. We infer star
formation histories (SFHs), metallicity evolution histories (MEHs) and compute
the Degree of Relicness (DoR) of each object. The UCMGs, covering a wide range
of DoR from 0.05 to 0.88, can be divided into three groups, according to how
extreme their SFH was. The first group consists of 81 extreme relics
($\text{DoR}\gtrsim0.6$) that have formed the totality of their stellar mass by
$z\sim2$ and have super-solar metallicities at all cosmic epochs. The second
group ($0.3\lesssim\text{DoR}\lesssim0.6$) contains 293 objects also
characterised by peaked SFHs but with a small percentage of later-formed stars
and with a variety of MEHs. The third group ($\text{DoR}\lesssim0.3$), has 56
objects that cannot be considered relics since they have extended SFHs and
formed a non-negligible fraction ($>25\%$) of their stellar mass at $z<2$. We
confirm that an efficient method of finding relics is to select UCMGs with
large velocity dispersion values but we believe that the most efficient way is
to select high velocity dispersion objects that also have super-solar
metallicities and high [Mg/Fe].</description><identifier>DOI: 10.48550/arxiv.2501.16126</identifier><language>eng</language><subject>Physics - Astrophysics of Galaxies</subject><creationdate>2025-01</creationdate><rights>http://creativecommons.org/licenses/by/4.0</rights><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>228,230,776,881</link.rule.ids><linktorsrc>$$Uhttps://arxiv.org/abs/2501.16126$$EView_record_in_Cornell_University$$FView_record_in_$$GCornell_University$$Hfree_for_read</linktorsrc><backlink>$$Uhttps://doi.org/10.48550/arXiv.2501.16126$$DView paper in arXiv$$Hfree_for_read</backlink></links><search><creatorcontrib>Mills, John</creatorcontrib><creatorcontrib>Spiniello, Chiara</creatorcontrib><creatorcontrib>Sergeyev, Alexey</creatorcontrib><creatorcontrib>Tortora, Crescenzo</creatorcontrib><creatorcontrib>Khramtsov, Vladyslav</creatorcontrib><creatorcontrib>D'Ago, Giuseppe</creatorcontrib><creatorcontrib>Maksymowicz-Maciata, Michalina</creatorcontrib><creatorcontrib>Benedetti, João P. V</creatorcontrib><creatorcontrib>Ferré-Mateu, Anna</creatorcontrib><creatorcontrib>Cappellari, Michele</creatorcontrib><creatorcontrib>Davies, Roger</creatorcontrib><creatorcontrib>Hartke, Johanna</creatorcontrib><creatorcontrib>Rosen, Charles</creatorcontrib><title>E-INSPIRE -- I. Bridging the gap with the local Universe: Stellar population of a statistical sample of ultra-compact massive galaxies at $z<0.3</title><description>This paper presents the first effort to Extend the Investigation of Stellar
Populations In RElics (E-INSPIRE). We present a catalogue of 430
spectroscopically-confirmed ultra-compact massive galaxies (UCMGs) from the
Sloan Digital Sky Survey at redshifts $0.01<z<0.3$. This increases the original
INSPIRE sample eightfold, bridging the gap with the local Universe. For each
object, we compute integrated stellar velocity dispersion, age, metallicity,
and [Mg/Fe] through spectroscopic stellar population analysis. We infer star
formation histories (SFHs), metallicity evolution histories (MEHs) and compute
the Degree of Relicness (DoR) of each object. The UCMGs, covering a wide range
of DoR from 0.05 to 0.88, can be divided into three groups, according to how
extreme their SFH was. The first group consists of 81 extreme relics
($\text{DoR}\gtrsim0.6$) that have formed the totality of their stellar mass by
$z\sim2$ and have super-solar metallicities at all cosmic epochs. The second
group ($0.3\lesssim\text{DoR}\lesssim0.6$) contains 293 objects also
characterised by peaked SFHs but with a small percentage of later-formed stars
and with a variety of MEHs. The third group ($\text{DoR}\lesssim0.3$), has 56
objects that cannot be considered relics since they have extended SFHs and
formed a non-negligible fraction ($>25\%$) of their stellar mass at $z<2$. We
confirm that an efficient method of finding relics is to select UCMGs with
large velocity dispersion values but we believe that the most efficient way is
to select high velocity dispersion objects that also have super-solar
metallicities and high [Mg/Fe].</description><subject>Physics - Astrophysics of Galaxies</subject><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2025</creationdate><recordtype>article</recordtype><sourceid>GOX</sourceid><recordid>eNqFT7tuwkAQvIYiAj4gVbagvcOGGCFEBXIUN1EUktpamcOstPad7hZC8hX55NhW-lSjGY3modR9mpjHdZYlcww3uppFlqQmXaWL1Z36yXXxcngt3nLQGgoDu0DHmtoa5GyhRg-fJOeBsKuQ4aOlqw3RbuAglhkDeOcvjEKuBXcChCgdiUK9O2Lj2fb6hSWgrlzjsRJoMMYupytgvJGNgAKz721ilhM1OiFHO_3DsXp4yt_3z3rYXvpADYavsv9QDh-W_zt-Ab7xUVE</recordid><startdate>20250127</startdate><enddate>20250127</enddate><creator>Mills, John</creator><creator>Spiniello, Chiara</creator><creator>Sergeyev, Alexey</creator><creator>Tortora, Crescenzo</creator><creator>Khramtsov, Vladyslav</creator><creator>D'Ago, Giuseppe</creator><creator>Maksymowicz-Maciata, Michalina</creator><creator>Benedetti, João P. V</creator><creator>Ferré-Mateu, Anna</creator><creator>Cappellari, Michele</creator><creator>Davies, Roger</creator><creator>Hartke, Johanna</creator><creator>Rosen, Charles</creator><scope>GOX</scope></search><sort><creationdate>20250127</creationdate><title>E-INSPIRE -- I. Bridging the gap with the local Universe: Stellar population of a statistical sample of ultra-compact massive galaxies at $z<0.3</title><author>Mills, John ; Spiniello, Chiara ; Sergeyev, Alexey ; Tortora, Crescenzo ; Khramtsov, Vladyslav ; D'Ago, Giuseppe ; Maksymowicz-Maciata, Michalina ; Benedetti, João P. V ; Ferré-Mateu, Anna ; Cappellari, Michele ; Davies, Roger ; Hartke, Johanna ; Rosen, Charles</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-arxiv_primary_2501_161263</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2025</creationdate><topic>Physics - Astrophysics of Galaxies</topic><toplevel>online_resources</toplevel><creatorcontrib>Mills, John</creatorcontrib><creatorcontrib>Spiniello, Chiara</creatorcontrib><creatorcontrib>Sergeyev, Alexey</creatorcontrib><creatorcontrib>Tortora, Crescenzo</creatorcontrib><creatorcontrib>Khramtsov, Vladyslav</creatorcontrib><creatorcontrib>D'Ago, Giuseppe</creatorcontrib><creatorcontrib>Maksymowicz-Maciata, Michalina</creatorcontrib><creatorcontrib>Benedetti, João P. V</creatorcontrib><creatorcontrib>Ferré-Mateu, Anna</creatorcontrib><creatorcontrib>Cappellari, Michele</creatorcontrib><creatorcontrib>Davies, Roger</creatorcontrib><creatorcontrib>Hartke, Johanna</creatorcontrib><creatorcontrib>Rosen, Charles</creatorcontrib><collection>arXiv.org</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>Mills, John</au><au>Spiniello, Chiara</au><au>Sergeyev, Alexey</au><au>Tortora, Crescenzo</au><au>Khramtsov, Vladyslav</au><au>D'Ago, Giuseppe</au><au>Maksymowicz-Maciata, Michalina</au><au>Benedetti, João P. V</au><au>Ferré-Mateu, Anna</au><au>Cappellari, Michele</au><au>Davies, Roger</au><au>Hartke, Johanna</au><au>Rosen, Charles</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>E-INSPIRE -- I. Bridging the gap with the local Universe: Stellar population of a statistical sample of ultra-compact massive galaxies at $z<0.3</atitle><date>2025-01-27</date><risdate>2025</risdate><abstract>This paper presents the first effort to Extend the Investigation of Stellar
Populations In RElics (E-INSPIRE). We present a catalogue of 430
spectroscopically-confirmed ultra-compact massive galaxies (UCMGs) from the
Sloan Digital Sky Survey at redshifts $0.01<z<0.3$. This increases the original
INSPIRE sample eightfold, bridging the gap with the local Universe. For each
object, we compute integrated stellar velocity dispersion, age, metallicity,
and [Mg/Fe] through spectroscopic stellar population analysis. We infer star
formation histories (SFHs), metallicity evolution histories (MEHs) and compute
the Degree of Relicness (DoR) of each object. The UCMGs, covering a wide range
of DoR from 0.05 to 0.88, can be divided into three groups, according to how
extreme their SFH was. The first group consists of 81 extreme relics
($\text{DoR}\gtrsim0.6$) that have formed the totality of their stellar mass by
$z\sim2$ and have super-solar metallicities at all cosmic epochs. The second
group ($0.3\lesssim\text{DoR}\lesssim0.6$) contains 293 objects also
characterised by peaked SFHs but with a small percentage of later-formed stars
and with a variety of MEHs. The third group ($\text{DoR}\lesssim0.3$), has 56
objects that cannot be considered relics since they have extended SFHs and
formed a non-negligible fraction ($>25\%$) of their stellar mass at $z<2$. We
confirm that an efficient method of finding relics is to select UCMGs with
large velocity dispersion values but we believe that the most efficient way is
to select high velocity dispersion objects that also have super-solar
metallicities and high [Mg/Fe].</abstract><doi>10.48550/arxiv.2501.16126</doi><oa>free_for_read</oa></addata></record> |
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| title | E-INSPIRE -- I. Bridging the gap with the local Universe: Stellar population of a statistical sample of ultra-compact massive galaxies at $z<0.3 |
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