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<ri:Resource created="2024-01-09T12:31:52Z" status="active" updated="2026-07-02T11:58:35Z" version="1.2" xmlns:cs="http://www.ivoa.net/xml/ConeSearch/v1.0" xmlns:ri="http://www.ivoa.net/xml/RegistryInterface/v1.0" xmlns:vr="http://www.ivoa.net/xml/VOResource/v1.0" xmlns:vs="http://www.ivoa.net/xml/VODataService/v1.1" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.ivoa.net/xml/ConeSearch/v1.0 http://vo.ari.uni-heidelberg.de/docs/schemata/ConeSearch.xsd http://www.ivoa.net/xml/VOResource/v1.0 http://vo.ari.uni-heidelberg.de/docs/schemata/VOResource.xsd http://www.ivoa.net/xml/VODataService/v1.1 http://vo.ari.uni-heidelberg.de/docs/schemata/VODataService.xsd" xsi:type="vs:CatalogService"><title>30yrs of spectroscopic measurements of VMP DLAs</title><shortName>J/ApJ/927/64</shortName><identifier>ivo://CDS.VizieR/J/ApJ/927/64</identifier><altIdentifier>doi:10.26093/cds/vizier/ba-wz-20</altIdentifier><curation><publisher ivo-id="ivo://CDS">CDS</publisher><creator><name>Nunez E.H.</name></creator><creator><name>Kirby E.N.</name></creator><creator><name>Steidel C.C.</name></creator><date role="Updated">2026-07-02T11:58:35Z</date><date role="Created">2024-01-09T12:31:52Z</date><contact><name>CDS support team</name><address>CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France</address><email>cds-question@unistra.fr</email></contact></curation><content><subject>quasars</subject><subject>redshifted</subject><subject>visible-astronomy</subject><subject>spectroscopy</subject><subject>chemical-abundances</subject><subject>astronomical-reference-materials</subject><subject>supernovae</subject><description>We place empirical constraints on the yields from zero- and low-metallicity core-collapse supernovae (CCSNe) using abundances measured in very metal-poor (VMP; [Fe/H]&lt;=-2) damped Ly{alpha} absorbers (DLAs). For some abundance ratios ([N,Al,S/Fe]), VMP DLAs constrain the metal yields of the first SNe more reliably than VMP stars. We compile a large sample of high-S/N VMP DLAs from over 30yr of literature, most with high-resolution spectral measurements. We infer the initial-mass-function-averaged CCSNe yield from the median values from the DLA abundance ratios of C, N, O, Al, Si, S, and Fe (over Fe and O). We assume that the DLAs are metal-poor enough that they represent galaxies in their earliest stages of evolution, when CCSNe are the only nucleosynthetic sources of the metals we analyze. We compare five sets of zero- and low-metallicity theoretical yields to the empirical yields derived in this work. We find that the five models agree with the DLA yields for ratios containing Si and S. Only one model (HW10; Heger &amp; Woosley 2010ApJ...724..341H) reproduced the DLA values for N, and one other model (LC18; Limongi &amp; Chieffi 2018ApJS..237...13L) reproduced [N/O]. We found little change in the theoretical yields with the adoption of an SN explosion landscape (where certain progenitor masses collapse into black holes, contributing no yields) onto HW10, but fixing explosion energy to progenitor mass results in wide disagreements between the predictions and DLA abundances. We investigate the adoption of a simple, observationally motivated initial distribution of rotational velocities for LC18 and find a slight improvement.</description><source format="bibcode">2022ApJ...927...64N</source><referenceURL>https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/927/64</referenceURL><type>Catalog</type><contentLevel>Research</contentLevel><relationship><relationshipType>IsServedBy</relationshipType><relatedResource ivo-id="ivo://CDS.VizieR/TAP">TAP VizieR generic service</relatedResource></relationship><relationship><relationshipType>IsServedBy</relationshipType><relatedResource>Conesearch service</relatedResource></relationship><relationship><relationshipType>related-to</relationshipType><relatedResource ivo-id="ivo://CDS.VizieR/J/A+A/370/426">J/A+A/370/426 : UVES sp. of APM BR J0307-4945 (Dessauges-Zavadsky+, 2001)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/A+A/416/1117">J/A+A/416/1117 : Abundances in the early Galaxy (Cayrel+, 2004)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/ApJ/649/L61">J/ApJ/649/L61 : SDSS J155810.16-003120.0 abundances (O'Meara+, 2006)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/ApJS/171/29">J/ApJS/171/29 : UCSD/Keck Damped Lya Abundance Database (Prochaska+, 2007)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/ApJ/708/560">J/ApJ/708/560 : Spectroscopy of UMa II and Coma Ber (Frebel+, 2010)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/ApJ/724/341">J/ApJ/724/341 : Nucleosynthesis of massive metal-free stars (Heger+, 2010)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/ApJ/723/1632">J/ApJ/723/1632 : Abundance spreads in Bootes I and Segue 1 (Norris+, 2010)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/ApJ/721/1">J/ApJ/721/1 : Keck ESI observations of Ly{alpha} systems (Penprase+, 2010)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/ApJ/755/89">J/ApJ/755/89 : Metallicities of damped Ly{alpha} systems (Rafelski+, 2012)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/ApJ/763/61">J/ApJ/763/61 : Abund. of 7 red giant members of BootesI (Gilmore+, 2013)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/A+A/556/A141">J/A+A/556/A141 : ESO-UVES Advanced Data Products (EUADP) (Zafar+, 2013)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/ApJ/786/74">J/ApJ/786/74 : EW measurements of 6 Segue 1 red giants (Frebel+, 2014)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/A+A/562/A146">J/A+A/562/A146 : Chemical abundances of 8 metal-poor stars (Ishigaki+, 2014)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/ApJ/797/21">J/ApJ/797/21 : Carbon-enhanced metal-poor stars (Placco+, 2014)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/MNRAS/440/2665">J/MNRAS/440/2665 : SDSS J021933.13+200830.2 spectroscopy (Roederer+, 2014)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/MNRAS/452/4326">J/MNRAS/452/4326 : Metal-rich damped Ly{alpha} systems at z~2 (Berg+, 2015)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/ApJ/801/125">J/ApJ/801/125 : Carbon in red giants in GCs and dSph galaxies (Kirby+, 2015)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/ApJ/817/41">J/ApJ/817/41 : Abundances of 4 metal-poor red giants in BooII (Ji+, 2016)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/AJ/151/82">J/AJ/151/82 : The 4 brightest red giants in Ret 2 (Roederer+, 2016)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/MNRAS/456/4488">J/MNRAS/456/4488 : XQ-100 survey neutral gas (Sanchez-Ramirez+, 2016)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/ApJ/838/44">J/ApJ/838/44 : Abund. of the brightest member of Tuc III (Hansen+, 2017)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/ApJ/838/83">J/ApJ/838/83 : RVels, abundances &amp; 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Should Not be used for identification.</description><ucd>meta.record</ucd><dataType xsi:type="vs:VOTableType">int</dataType></column><column><name>ID</name><description>Quasar abbreviated designation</description><ucd>meta.id</ucd><dataType xsi:type="vs:VOTableType" arraysize="13*">char</dataType></column><column><name>Name</name><description>Quasar full name (1)</description><ucd>meta.id;meta.main</ucd><dataType xsi:type="vs:VOTableType" arraysize="25*">char</dataType></column><column><name>zabs</name><description>[1.77/5.94] Redshift of the DLA</description><ucd>src.redshift</ucd><dataType xsi:type="vs:VOTableType">double</dataType></column><column><name>logNHI</name><description>[20/21.8] Log of HI column density</description><unit>cm**-2</unit><ucd>phys.columnDensity</ucd><dataType xsi:type="vs:VOTableType">float</dataType></column><column><name>e_logNHI</name><description>[0.02/0.2] logNHI uncertainty</description><unit>cm**-2</unit><ucd>stat.error</ucd><dataType xsi:type="vs:VOTableType">float</dataType></column><column><name>l_[Fe/H]</name><description>Upper limit flag on [Fe/H]</description><ucd>meta.code.error;phys.abund.Fe</ucd><dataType xsi:type="vs:VOTableType" arraysize="1*">char</dataType></column><column><name>[Fe/H]</name><description>[-3.45/-1.91] Log of Fe/H abundance</description><unit>log(Sun)</unit><ucd>phys.abund.Fe</ucd><dataType xsi:type="vs:VOTableType">float</dataType></column><column><name>e_[Fe/H]</name><description>[0.001/0.3]? 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[C/H] uncertainty</description><unit>log(Sun)</unit><ucd>stat.error;phys.abund</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>f_[N/H]</name><description>[&lt;x] Limit flag on [N/H] ("x" when no value)</description><ucd>meta.code</ucd><dataType xsi:type="vs:VOTableType" arraysize="1*">char</dataType></column><column><name>[N/H]</name><description>[-4.2/-2.04]? Log of N/H abundance</description><unit>log(Sun)</unit><ucd>phys.abund</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>e_[N/H]</name><description>[0.04/0.15]? [N/H] uncertainty</description><unit>log(Sun)</unit><ucd>stat.error;phys.abund</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>f_[O/H]</name><description>[&lt;x] Limit flag on [O/H] ("x" when no value)</description><ucd>meta.code</ucd><dataType xsi:type="vs:VOTableType" arraysize="1*">char</dataType></column><column><name>Ref</name><description>Reference code (2)</description><ucd>meta.note</ucd><dataType xsi:type="vs:VOTableType" arraysize="9*">char</dataType></column><column><name>[O/H]</name><description>[-3.17/-1.45]? Log of O/H abundance</description><unit>log(Sun)</unit><ucd>phys.abund</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>e_[O/H]</name><description>[0.015/0.2]? 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