The growth of the central region by acquisition of counterrotating gas in star-forming galaxies
Autor(a) principal: | |
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Data de Publicação: | 2016 |
Outros Autores: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/163681 |
Resumo: | Galaxies grow through both internal and external processes. In about 10% of nearby red galaxies with little star formation, gas and stars are counter-rotating, demonstrating the importance of external gas acquisition in these galaxies. However, systematic studies of such phenomena in blue, star-forming galaxies are rare, leaving uncertain the role of external gas acquisition in driving evolution of blue galaxies. Here, based on new measurements with integral field spectroscopy of a large representative galaxy sample, we find an appreciable fraction of counterrotators among blue galaxies (9 out of 489 galaxies). The central regions of blue counterrotators show younger stellar populations and more intense, ongoing star formation than their outer parts, indicating ongoing growth of the central regions. The result offers observational evidence that the acquisition of external gas in blue galaxies is possible; the interaction with pre-existing gas funnels the gas into nuclear regions (o1 kpc) to form new stars. |
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Chen, YanmeiShi, YongTremonti, Christy A.Bershady, Matthew A.Merrifield, MichaelEmsellem, EricJin, YifeiHuang, SongFu, HaiWake, D.A.Bundy, KevinStark, David V.Lin, LihwaiArgudo-Fernández, MariaStorchi-Bergmann, ThaisaBizyaev, D.Brownstein, Joel R.Bureau, MartinChisholm, John P.Drory, NivGuo, QiHao, LeiHu, JianLi, ChengLi, RanLopes, Alexandre RomanPan, K.Riffel, Rogemar AndréThomas, D.Wang, LanWestfall, Kyle B.Yan, Renbin2017-07-05T02:40:26Z20162041-1723http://hdl.handle.net/10183/163681001020971Galaxies grow through both internal and external processes. In about 10% of nearby red galaxies with little star formation, gas and stars are counter-rotating, demonstrating the importance of external gas acquisition in these galaxies. However, systematic studies of such phenomena in blue, star-forming galaxies are rare, leaving uncertain the role of external gas acquisition in driving evolution of blue galaxies. Here, based on new measurements with integral field spectroscopy of a large representative galaxy sample, we find an appreciable fraction of counterrotators among blue galaxies (9 out of 489 galaxies). The central regions of blue counterrotators show younger stellar populations and more intense, ongoing star formation than their outer parts, indicating ongoing growth of the central regions. The result offers observational evidence that the acquisition of external gas in blue galaxies is possible; the interaction with pre-existing gas funnels the gas into nuclear regions (o1 kpc) to form new stars.application/pdfengNature Communications. London. Vol. 7 (Oct. 2016), 13269, 9 p.Formacao de estrelasEspectroscopiaPopulacoes estelaresThe growth of the central region by acquisition of counterrotating gas in star-forming galaxiesEstrangeiroinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFRGSinstname:Universidade Federal do Rio Grande do Sul (UFRGS)instacron:UFRGSORIGINAL001020971.pdf001020971.pdfTexto completo (inglês)application/pdf1838620http://www.lume.ufrgs.br/bitstream/10183/163681/1/001020971.pdfb76dfe71472a326286ce6f36fdc1e25aMD51TEXT001020971.pdf.txt001020971.pdf.txtExtracted Texttext/plain41008http://www.lume.ufrgs.br/bitstream/10183/163681/2/001020971.pdf.txt3d1e3f6e141952cc57156260c339014cMD52THUMBNAIL001020971.pdf.jpg001020971.pdf.jpgGenerated Thumbnailimage/jpeg1764http://www.lume.ufrgs.br/bitstream/10183/163681/3/001020971.pdf.jpgdbf4ac03fa09ca741d95f160313936bbMD5310183/1636812021-09-18 04:44:48.302603oai:www.lume.ufrgs.br:10183/163681Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2021-09-18T07:44:48Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
The growth of the central region by acquisition of counterrotating gas in star-forming galaxies |
title |
The growth of the central region by acquisition of counterrotating gas in star-forming galaxies |
spellingShingle |
The growth of the central region by acquisition of counterrotating gas in star-forming galaxies Chen, Yanmei Formacao de estrelas Espectroscopia Populacoes estelares |
title_short |
The growth of the central region by acquisition of counterrotating gas in star-forming galaxies |
title_full |
The growth of the central region by acquisition of counterrotating gas in star-forming galaxies |
title_fullStr |
The growth of the central region by acquisition of counterrotating gas in star-forming galaxies |
title_full_unstemmed |
The growth of the central region by acquisition of counterrotating gas in star-forming galaxies |
title_sort |
The growth of the central region by acquisition of counterrotating gas in star-forming galaxies |
author |
Chen, Yanmei |
author_facet |
Chen, Yanmei Shi, Yong Tremonti, Christy A. Bershady, Matthew A. Merrifield, Michael Emsellem, Eric Jin, Yifei Huang, Song Fu, Hai Wake, D.A. Bundy, Kevin Stark, David V. Lin, Lihwai Argudo-Fernández, Maria Storchi-Bergmann, Thaisa Bizyaev, D. Brownstein, Joel R. Bureau, Martin Chisholm, John P. Drory, Niv Guo, Qi Hao, Lei Hu, Jian Li, Cheng Li, Ran Lopes, Alexandre Roman Pan, K. Riffel, Rogemar André Thomas, D. Wang, Lan Westfall, Kyle B. Yan, Renbin |
author_role |
author |
author2 |
Shi, Yong Tremonti, Christy A. Bershady, Matthew A. Merrifield, Michael Emsellem, Eric Jin, Yifei Huang, Song Fu, Hai Wake, D.A. Bundy, Kevin Stark, David V. Lin, Lihwai Argudo-Fernández, Maria Storchi-Bergmann, Thaisa Bizyaev, D. Brownstein, Joel R. Bureau, Martin Chisholm, John P. Drory, Niv Guo, Qi Hao, Lei Hu, Jian Li, Cheng Li, Ran Lopes, Alexandre Roman Pan, K. Riffel, Rogemar André Thomas, D. Wang, Lan Westfall, Kyle B. Yan, Renbin |
author2_role |
author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author |
dc.contributor.author.fl_str_mv |
Chen, Yanmei Shi, Yong Tremonti, Christy A. Bershady, Matthew A. Merrifield, Michael Emsellem, Eric Jin, Yifei Huang, Song Fu, Hai Wake, D.A. Bundy, Kevin Stark, David V. Lin, Lihwai Argudo-Fernández, Maria Storchi-Bergmann, Thaisa Bizyaev, D. Brownstein, Joel R. Bureau, Martin Chisholm, John P. Drory, Niv Guo, Qi Hao, Lei Hu, Jian Li, Cheng Li, Ran Lopes, Alexandre Roman Pan, K. Riffel, Rogemar André Thomas, D. Wang, Lan Westfall, Kyle B. Yan, Renbin |
dc.subject.por.fl_str_mv |
Formacao de estrelas Espectroscopia Populacoes estelares |
topic |
Formacao de estrelas Espectroscopia Populacoes estelares |
description |
Galaxies grow through both internal and external processes. In about 10% of nearby red galaxies with little star formation, gas and stars are counter-rotating, demonstrating the importance of external gas acquisition in these galaxies. However, systematic studies of such phenomena in blue, star-forming galaxies are rare, leaving uncertain the role of external gas acquisition in driving evolution of blue galaxies. Here, based on new measurements with integral field spectroscopy of a large representative galaxy sample, we find an appreciable fraction of counterrotators among blue galaxies (9 out of 489 galaxies). The central regions of blue counterrotators show younger stellar populations and more intense, ongoing star formation than their outer parts, indicating ongoing growth of the central regions. The result offers observational evidence that the acquisition of external gas in blue galaxies is possible; the interaction with pre-existing gas funnels the gas into nuclear regions (o1 kpc) to form new stars. |
publishDate |
2016 |
dc.date.issued.fl_str_mv |
2016 |
dc.date.accessioned.fl_str_mv |
2017-07-05T02:40:26Z |
dc.type.driver.fl_str_mv |
Estrangeiro info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10183/163681 |
dc.identifier.issn.pt_BR.fl_str_mv |
2041-1723 |
dc.identifier.nrb.pt_BR.fl_str_mv |
001020971 |
identifier_str_mv |
2041-1723 001020971 |
url |
http://hdl.handle.net/10183/163681 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.ispartof.pt_BR.fl_str_mv |
Nature Communications. London. Vol. 7 (Oct. 2016), 13269, 9 p. |
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info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
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application/pdf |
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