Gas and Star Formation in Satellites of Milky Way Analogs
We have imaged the entirety of eight (plus one partial) Milky Way (MW)–like satellite systems, a total of 42 (45) satellites, from the Satellites Around Galactic Analogs II catalog in both Hα and H i with the Canada–France–Hawaii Telescope and the Jansky Very Large Array. In these eight systems we h...
| Autores: | , , , , , , , , , , , , |
|---|---|
| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2024 |
| País: | España |
| Institución: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/371138 |
| Acceso en línea: | http://hdl.handle.net/10261/371138 |
| Access Level: | acceso abierto |
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Gas and Star Formation in Satellites of Milky Way AnalogsJones, Michael G.Sand, David J.Karunakaran, AnanthanSpekkens, KristineOman, Kyle A.Bennet, PaulBesla, GurtinaCrnojević, DenijaCuillandre, Jean-CharlesFielder, Catherine E.Gwyn, StephenMutlu-Pakdil, BurçinXie, FeiWe have imaged the entirety of eight (plus one partial) Milky Way (MW)–like satellite systems, a total of 42 (45) satellites, from the Satellites Around Galactic Analogs II catalog in both Hα and H i with the Canada–France–Hawaii Telescope and the Jansky Very Large Array. In these eight systems we have identified four cases where a satellite appears to be currently undergoing ram pressure stripping (RPS) as its H i gas collides with the circumgalactic medium (CGM) of its host. We also see a clear suppression of gas fraction (MHI/M*) with decreasing (projected) satellite–host separation—to our knowledge, the first time this has been observed in a sample of MW-like systems. Comparisons to the Auriga, A Project Of Simulating The Local Environment, and TNG50 cosmological zoom-in simulations show consistent global behavior, but they systematically underpredict gas fractions across all satellites by roughly 0.5 dex. Using a simplistic RPS model, we estimate the average peak CGM density that satellites in these systems have encountered to be . Furthermore, we see tentative evidence that these satellites are following a specific star formation rate to gas fraction relation that is distinct from field galaxies. Finally, we detect one new gas-rich satellite in the UGC 903 system with an optical size and surface brightness meeting the standard criteria to be considered an ultra-diffuse galaxy. © 2024. The Author(s). Published by the American Astronomical Society.This work used images from the Dark Energy Camera Legacy Survey (DECaLS; Proposal ID 2014B-0404; PIs: D. Schlegel and A. Dey). Full acknowledgment at https://www.legacysurvey.org/acknowledgment/. This work used data from the Karl G. Jansky Very Large Array. The National Radio Astronomy Observatory is a facility of the National Science Foundation operated under cooperative agreement by Associated Universities, Inc. The data were observed as part of program 22A-023 (PI: M. Jones). D.J.S. acknowledges support from NSF grant AST-2205863. K.S. acknowledges support from the Natural Sciences and Engineering Research Council of Canada (NSERC). A.K. acknowledges financial support from a grant (SEV-2017-0709) funded by MCIN/AEI/ 10.13039/501100011033 and from the grant POSTDOC_21_00845 funded by the Economic Transformation, Industry, Knowledge and Universities Council of the Regional Government of Andalusia. D.C. acknowledges support from NSF grant AST-1814208. K.A.O. is supported by a Royal Society Dorothy Hodgkin Fellowship, by STFC through grant No. ST/T000244/1, and by the European Research Council (ERC) through Advanced Investigator grant to C. S. Frenk, DMIDAS (GA 786910).With funding from the Spanish government through the "Severo Ochoa Centre of Excellence" accreditation (SEV-2017-0709).Peer reviewedIOP PublishingMinisterio de Ciencia e Innovación (España)European CommissionEuropean Research CouncilNational Science Foundation (US)Science and Technology Facilities Council (UK)Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202420242024info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/371138reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/EC/H2020/786910info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/SEV-2017-0709http://dx.doi.org/10.3847/1538-4357/ad3076Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/3711382026-05-22T06:33:51Z |
| dc.title.none.fl_str_mv |
Gas and Star Formation in Satellites of Milky Way Analogs |
| title |
Gas and Star Formation in Satellites of Milky Way Analogs |
| spellingShingle |
Gas and Star Formation in Satellites of Milky Way Analogs Jones, Michael G. |
| title_short |
Gas and Star Formation in Satellites of Milky Way Analogs |
| title_full |
Gas and Star Formation in Satellites of Milky Way Analogs |
| title_fullStr |
Gas and Star Formation in Satellites of Milky Way Analogs |
| title_full_unstemmed |
Gas and Star Formation in Satellites of Milky Way Analogs |
| title_sort |
Gas and Star Formation in Satellites of Milky Way Analogs |
| dc.creator.none.fl_str_mv |
Jones, Michael G. Sand, David J. Karunakaran, Ananthan Spekkens, Kristine Oman, Kyle A. Bennet, Paul Besla, Gurtina Crnojević, Denija Cuillandre, Jean-Charles Fielder, Catherine E. Gwyn, Stephen Mutlu-Pakdil, Burçin Xie, Fei |
| author |
Jones, Michael G. |
| author_facet |
Jones, Michael G. Sand, David J. Karunakaran, Ananthan Spekkens, Kristine Oman, Kyle A. Bennet, Paul Besla, Gurtina Crnojević, Denija Cuillandre, Jean-Charles Fielder, Catherine E. Gwyn, Stephen Mutlu-Pakdil, Burçin Xie, Fei |
| author_role |
author |
| author2 |
Sand, David J. Karunakaran, Ananthan Spekkens, Kristine Oman, Kyle A. Bennet, Paul Besla, Gurtina Crnojević, Denija Cuillandre, Jean-Charles Fielder, Catherine E. Gwyn, Stephen Mutlu-Pakdil, Burçin Xie, Fei |
| author2_role |
author author author author author author author author author author author author |
| dc.contributor.none.fl_str_mv |
Ministerio de Ciencia e Innovación (España) European Commission European Research Council National Science Foundation (US) Science and Technology Facilities Council (UK) Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72] |
| description |
We have imaged the entirety of eight (plus one partial) Milky Way (MW)–like satellite systems, a total of 42 (45) satellites, from the Satellites Around Galactic Analogs II catalog in both Hα and H i with the Canada–France–Hawaii Telescope and the Jansky Very Large Array. In these eight systems we have identified four cases where a satellite appears to be currently undergoing ram pressure stripping (RPS) as its H i gas collides with the circumgalactic medium (CGM) of its host. We also see a clear suppression of gas fraction (MHI/M*) with decreasing (projected) satellite–host separation—to our knowledge, the first time this has been observed in a sample of MW-like systems. Comparisons to the Auriga, A Project Of Simulating The Local Environment, and TNG50 cosmological zoom-in simulations show consistent global behavior, but they systematically underpredict gas fractions across all satellites by roughly 0.5 dex. Using a simplistic RPS model, we estimate the average peak CGM density that satellites in these systems have encountered to be . Furthermore, we see tentative evidence that these satellites are following a specific star formation rate to gas fraction relation that is distinct from field galaxies. Finally, we detect one new gas-rich satellite in the UGC 903 system with an optical size and surface brightness meeting the standard criteria to be considered an ultra-diffuse galaxy. © 2024. The Author(s). Published by the American Astronomical Society. |
| publishDate |
2024 |
| dc.date.none.fl_str_mv |
2024 2024 2024 |
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info:eu-repo/semantics/article http://purl.org/coar/resource_type/c_6501 Publisher's version info:eu-repo/semantics/publishedVersion |
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article |
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publishedVersion |
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http://hdl.handle.net/10261/371138 |
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http://hdl.handle.net/10261/371138 |
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Inglés |
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Inglés |
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#PLACEHOLDER_PARENT_METADATA_VALUE# #PLACEHOLDER_PARENT_METADATA_VALUE# info:eu-repo/grantAgreement/EC/H2020/786910 info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/SEV-2017-0709 http://dx.doi.org/10.3847/1538-4357/ad3076 Sí |
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info:eu-repo/semantics/openAccess |
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openAccess |
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IOP Publishing |
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IOP Publishing |
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reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC instname:Consejo Superior de Investigaciones Científicas (CSIC) |
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