Observations of cold gas and star formation in dwarf S0 galaxies
Very little work has been done on star formation in dwarf lenticular galaxies (S0s). We present 2D spectroscopic and millimetre observations made by the Centro Astronómico Hispano Alemán (CAHA) 3.5-m optical and Institut de Radioastronomie Millimétrique (IRAM) 30-m millimetre telescopes, respectivel...
| Autores: | , , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2021 |
| País: | España |
| Institución: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/260000 |
| Acceso en línea: | http://hdl.handle.net/10261/260000 |
| Access Level: | acceso abierto |
| Palabra clave: | Galaxies: elliptical and lenticular CD Galaxies: evolution Galaxies: star formation |
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Observations of cold gas and star formation in dwarf S0 galaxiesGe, XueGu, Qiu-ShengGarcía-Benito, RubénLu, Shi-YingLei, Cheng-LongDing, NanGalaxies: elliptical and lenticularCDGalaxies: evolutionGalaxies: star formationVery little work has been done on star formation in dwarf lenticular galaxies (S0s). We present 2D spectroscopic and millimetre observations made by the Centro Astronómico Hispano Alemán (CAHA) 3.5-m optical and Institut de Radioastronomie Millimétrique (IRAM) 30-m millimetre telescopes, respectively, for a sample of four dwarf S0 galaxies with multiple star formation regions in the field environment. We find that, although most of the sources deviate from the star-forming main-sequence relation, they all follow the Kennicutt-Schmidt law. After comparing the stellar and Hα kinematics, we find that the velocity fields of both stars and ionized gas show no regular motion and the velocity dispersions of both stars and ionized gas are low in regions with high star formation, suggesting that these star-forming S0 galaxies still have significant rotation. This view can be supported by the result that most of these dwarf S0 galaxies are classified as fast rotators. The ratio of the average atomic gas mass to stellar mass ($\sim 47{{\ \rm per\ cent}}$) is much greater than that of the molecular gas mass to stellar mass ($\sim 1{{\ \rm per\ cent}}$). In addition, gas-phase metallicities in star-forming regions are lower than those of non-star-forming regions. These results indicate that extended star formation may originate from the combination of abundant atomic hydrogen, a long dynamic time-scale, and a low-density environment. © 2021 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society.This work is supported by the National Key Research and Development Program of China (No. 2017YFA0402703) and by the National Natural Science Foundation of China (No. 11733002). In addition, we acknowledge the support of the staff from CAHA and IRAM-30 m. RGB acknowledges additional financial support from the State Agency for Research of the Spanish (MCIU) through the Center of Excellence Severo Ochoa award to the Instituto de Astrofísica de Andalucía (SEV-2017-0709), grants PID2019-109067GB-I00 (MCIU), and P18-FRJ-2595 (Junta de Andalucía). We are grateful for the support of the scientific research fund of Jiangsu Second Normal University (927801/032). N.D acknowledges financial support from the National Natural Science Foundation of China grant 12103022 and the scientific research fund of Yunnan Provincial Education Department (2021J0715).Peer reviewedOxford University PressNational Natural Science Foundation of ChinaMinisterio de Economía y Competitividad (España)Ministerio de Ciencia, Innovación y Universidades (España)Junta de AndalucíaEuropean CommissionConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202220222021info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/260000reponame: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/MICINN//SEV-2017-0709info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2019-109067GB-I00http://dx.doi.org/10.1093/mnras/stab2378Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/2600002026-05-22T06:33:51Z |
| dc.title.none.fl_str_mv |
Observations of cold gas and star formation in dwarf S0 galaxies |
| title |
Observations of cold gas and star formation in dwarf S0 galaxies |
| spellingShingle |
Observations of cold gas and star formation in dwarf S0 galaxies Ge, Xue Galaxies: elliptical and lenticular CD Galaxies: evolution Galaxies: star formation |
| title_short |
Observations of cold gas and star formation in dwarf S0 galaxies |
| title_full |
Observations of cold gas and star formation in dwarf S0 galaxies |
| title_fullStr |
Observations of cold gas and star formation in dwarf S0 galaxies |
| title_full_unstemmed |
Observations of cold gas and star formation in dwarf S0 galaxies |
| title_sort |
Observations of cold gas and star formation in dwarf S0 galaxies |
| dc.creator.none.fl_str_mv |
Ge, Xue Gu, Qiu-Sheng García-Benito, Rubén Lu, Shi-Ying Lei, Cheng-Long Ding, Nan |
| author |
Ge, Xue |
| author_facet |
Ge, Xue Gu, Qiu-Sheng García-Benito, Rubén Lu, Shi-Ying Lei, Cheng-Long Ding, Nan |
| author_role |
author |
| author2 |
Gu, Qiu-Sheng García-Benito, Rubén Lu, Shi-Ying Lei, Cheng-Long Ding, Nan |
| author2_role |
author author author author author |
| dc.contributor.none.fl_str_mv |
National Natural Science Foundation of China Ministerio de Economía y Competitividad (España) Ministerio de Ciencia, Innovación y Universidades (España) Junta de Andalucía European Commission Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72] |
| dc.subject.none.fl_str_mv |
Galaxies: elliptical and lenticular CD Galaxies: evolution Galaxies: star formation |
| topic |
Galaxies: elliptical and lenticular CD Galaxies: evolution Galaxies: star formation |
| description |
Very little work has been done on star formation in dwarf lenticular galaxies (S0s). We present 2D spectroscopic and millimetre observations made by the Centro Astronómico Hispano Alemán (CAHA) 3.5-m optical and Institut de Radioastronomie Millimétrique (IRAM) 30-m millimetre telescopes, respectively, for a sample of four dwarf S0 galaxies with multiple star formation regions in the field environment. We find that, although most of the sources deviate from the star-forming main-sequence relation, they all follow the Kennicutt-Schmidt law. After comparing the stellar and Hα kinematics, we find that the velocity fields of both stars and ionized gas show no regular motion and the velocity dispersions of both stars and ionized gas are low in regions with high star formation, suggesting that these star-forming S0 galaxies still have significant rotation. This view can be supported by the result that most of these dwarf S0 galaxies are classified as fast rotators. The ratio of the average atomic gas mass to stellar mass ($\sim 47{{\ \rm per\ cent}}$) is much greater than that of the molecular gas mass to stellar mass ($\sim 1{{\ \rm per\ cent}}$). In addition, gas-phase metallicities in star-forming regions are lower than those of non-star-forming regions. These results indicate that extended star formation may originate from the combination of abundant atomic hydrogen, a long dynamic time-scale, and a low-density environment. © 2021 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society. |
| publishDate |
2021 |
| dc.date.none.fl_str_mv |
2021 2022 2022 |
| dc.type.none.fl_str_mv |
info:eu-repo/semantics/article http://purl.org/coar/resource_type/c_6501 Publisher's version info:eu-repo/semantics/publishedVersion |
| format |
article |
| status_str |
publishedVersion |
| dc.identifier.none.fl_str_mv |
http://hdl.handle.net/10261/260000 |
| url |
http://hdl.handle.net/10261/260000 |
| dc.language.none.fl_str_mv |
Inglés |
| language_invalid_str_mv |
Inglés |
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#PLACEHOLDER_PARENT_METADATA_VALUE# #PLACEHOLDER_PARENT_METADATA_VALUE# info:eu-repo/grantAgreement/MICINN//SEV-2017-0709 info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2019-109067GB-I00 http://dx.doi.org/10.1093/mnras/stab2378 Sí |
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info:eu-repo/semantics/openAccess |
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openAccess |
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Oxford University Press |
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Oxford University Press |
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reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC instname:Consejo Superior de Investigaciones Científicas (CSIC) |
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Consejo Superior de Investigaciones Científicas (CSIC) |
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DIGITAL.CSIC. Repositorio Institucional del CSIC |
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DIGITAL.CSIC. Repositorio Institucional del CSIC |
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