High-velocity extended molecular outflow in the star-formation dominated luminous infrared galaxy ESO 320-G030
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/10183/178126 |
Resumo: | We analyze new high spatial resolution ( 60 pc) ALMA CO(21) observations of the isolated luminous infrared galaxy ESO 320- G030 (d = 48 Mpc) in combination with ancillary Hubble Space Telescope optical and near infrared (IR) imaging, as well as VLT/ SINFONI near-IR integral field spectroscopy. We detect a high-velocity ( 450 km s1) spatially resolved (size 2.5 kpc; dynamical time 3 Myr) massive ( 107 M ; ˙M 28 M yr1) molecular outflow that has originated in the central 250 pc. We observe a clumpy structure in the outflowing cold molecular gas with clump sizes between 60 and 150 pc and masses between 105:5 and 106:4 M . The mass of the clumps decreases with increasing distance, while the velocity is approximately constant. Therefore, both the momentum and kinetic energy of the clumps decrease outwards. In the innermost ( 100 pc) part of the outflow, we measure a hot-to-cold molecular gas ratio of 7 105, which is similar to that measured in other resolved molecular outflows. We do not find evidence of an ionized phase in this outflow. The nuclear IR and radio properties are compatible with strong and highly obscured star-formation (Ak 4:6 mag; star formation rate 15 M yr1). We do not find any evidence for the presence of an active galactic nucleus. We estimate that supernova explosions in the nuclear starburst ( SN 0:2 yr1) can power the observed molecular outflow. The kinetic energy and radial momentum of the cold molecular phase of the outflow correspond to about 2% and 20%, respectively, of the supernovae output. The cold molecular outflow velocity is lower than the escape velocity, so the gas will likely return to the galaxy disk. The mass loading factor is 0.10.5, so the negative feedback owing to this star-formation-powered molecular outflow is probably limited. |
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Pereira-Santaella, MiguelColina, LuisGarcia-Burillo, SantiagoAlonso-Herrero, AlmudenaArribas, SantiagoCazzoli, SaraEmonts, BjornPiqueras López, JavierPlanesas, PereStorchi-Bergmann, ThaisaUsero, AntonioVillar-Martín, Montse2018-05-11T02:33:24Z20160004-6361http://hdl.handle.net/10183/178126001063445We analyze new high spatial resolution ( 60 pc) ALMA CO(21) observations of the isolated luminous infrared galaxy ESO 320- G030 (d = 48 Mpc) in combination with ancillary Hubble Space Telescope optical and near infrared (IR) imaging, as well as VLT/ SINFONI near-IR integral field spectroscopy. We detect a high-velocity ( 450 km s1) spatially resolved (size 2.5 kpc; dynamical time 3 Myr) massive ( 107 M ; ˙M 28 M yr1) molecular outflow that has originated in the central 250 pc. We observe a clumpy structure in the outflowing cold molecular gas with clump sizes between 60 and 150 pc and masses between 105:5 and 106:4 M . The mass of the clumps decreases with increasing distance, while the velocity is approximately constant. Therefore, both the momentum and kinetic energy of the clumps decrease outwards. In the innermost ( 100 pc) part of the outflow, we measure a hot-to-cold molecular gas ratio of 7 105, which is similar to that measured in other resolved molecular outflows. We do not find evidence of an ionized phase in this outflow. The nuclear IR and radio properties are compatible with strong and highly obscured star-formation (Ak 4:6 mag; star formation rate 15 M yr1). We do not find any evidence for the presence of an active galactic nucleus. We estimate that supernova explosions in the nuclear starburst ( SN 0:2 yr1) can power the observed molecular outflow. The kinetic energy and radial momentum of the cold molecular phase of the outflow correspond to about 2% and 20%, respectively, of the supernovae output. The cold molecular outflow velocity is lower than the escape velocity, so the gas will likely return to the galaxy disk. The mass loading factor is 0.10.5, so the negative feedback owing to this star-formation-powered molecular outflow is probably limited.application/pdfengAstronomy and astrophysics. Les Ulis. Vol. 594 (Oct. 2016), A81, 12 p.Galaxias StarburstNucleo galaticoCinemáticaMeio interestelarGalaxies: ISMGalaxies: kinematics and dynamicsGalaxies: starburstRalaxies: nucleiRadio lines: galaxiesHigh-velocity extended molecular outflow in the star-formation dominated luminous infrared galaxy ESO 320-G030Estrangeiroinfo: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:UFRGSORIGINAL001063445.pdf001063445.pdfTexto completo (inglês)application/pdf1562533http://www.lume.ufrgs.br/bitstream/10183/178126/1/001063445.pdf64d8b25a8253a08e30e3e3a94c97fd01MD51TEXT001063445.pdf.txt001063445.pdf.txtExtracted Texttext/plain66789http://www.lume.ufrgs.br/bitstream/10183/178126/2/001063445.pdf.txt28405a90d3eb8d77eddad8a7f1a8eb0eMD5210183/1781262018-05-12 03:23:26.819585oai:www.lume.ufrgs.br:10183/178126Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2018-05-12T06:23:26Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
High-velocity extended molecular outflow in the star-formation dominated luminous infrared galaxy ESO 320-G030 |
title |
High-velocity extended molecular outflow in the star-formation dominated luminous infrared galaxy ESO 320-G030 |
spellingShingle |
High-velocity extended molecular outflow in the star-formation dominated luminous infrared galaxy ESO 320-G030 Pereira-Santaella, Miguel Galaxias Starburst Nucleo galatico Cinemática Meio interestelar Galaxies: ISM Galaxies: kinematics and dynamics Galaxies: starburst Ralaxies: nuclei Radio lines: galaxies |
title_short |
High-velocity extended molecular outflow in the star-formation dominated luminous infrared galaxy ESO 320-G030 |
title_full |
High-velocity extended molecular outflow in the star-formation dominated luminous infrared galaxy ESO 320-G030 |
title_fullStr |
High-velocity extended molecular outflow in the star-formation dominated luminous infrared galaxy ESO 320-G030 |
title_full_unstemmed |
High-velocity extended molecular outflow in the star-formation dominated luminous infrared galaxy ESO 320-G030 |
title_sort |
High-velocity extended molecular outflow in the star-formation dominated luminous infrared galaxy ESO 320-G030 |
author |
Pereira-Santaella, Miguel |
author_facet |
Pereira-Santaella, Miguel Colina, Luis Garcia-Burillo, Santiago Alonso-Herrero, Almudena Arribas, Santiago Cazzoli, Sara Emonts, Bjorn Piqueras López, Javier Planesas, Pere Storchi-Bergmann, Thaisa Usero, Antonio Villar-Martín, Montse |
author_role |
author |
author2 |
Colina, Luis Garcia-Burillo, Santiago Alonso-Herrero, Almudena Arribas, Santiago Cazzoli, Sara Emonts, Bjorn Piqueras López, Javier Planesas, Pere Storchi-Bergmann, Thaisa Usero, Antonio Villar-Martín, Montse |
author2_role |
author author author author author author author author author author author |
dc.contributor.author.fl_str_mv |
Pereira-Santaella, Miguel Colina, Luis Garcia-Burillo, Santiago Alonso-Herrero, Almudena Arribas, Santiago Cazzoli, Sara Emonts, Bjorn Piqueras López, Javier Planesas, Pere Storchi-Bergmann, Thaisa Usero, Antonio Villar-Martín, Montse |
dc.subject.por.fl_str_mv |
Galaxias Starburst Nucleo galatico Cinemática Meio interestelar |
topic |
Galaxias Starburst Nucleo galatico Cinemática Meio interestelar Galaxies: ISM Galaxies: kinematics and dynamics Galaxies: starburst Ralaxies: nuclei Radio lines: galaxies |
dc.subject.eng.fl_str_mv |
Galaxies: ISM Galaxies: kinematics and dynamics Galaxies: starburst Ralaxies: nuclei Radio lines: galaxies |
description |
We analyze new high spatial resolution ( 60 pc) ALMA CO(21) observations of the isolated luminous infrared galaxy ESO 320- G030 (d = 48 Mpc) in combination with ancillary Hubble Space Telescope optical and near infrared (IR) imaging, as well as VLT/ SINFONI near-IR integral field spectroscopy. We detect a high-velocity ( 450 km s1) spatially resolved (size 2.5 kpc; dynamical time 3 Myr) massive ( 107 M ; ˙M 28 M yr1) molecular outflow that has originated in the central 250 pc. We observe a clumpy structure in the outflowing cold molecular gas with clump sizes between 60 and 150 pc and masses between 105:5 and 106:4 M . The mass of the clumps decreases with increasing distance, while the velocity is approximately constant. Therefore, both the momentum and kinetic energy of the clumps decrease outwards. In the innermost ( 100 pc) part of the outflow, we measure a hot-to-cold molecular gas ratio of 7 105, which is similar to that measured in other resolved molecular outflows. We do not find evidence of an ionized phase in this outflow. The nuclear IR and radio properties are compatible with strong and highly obscured star-formation (Ak 4:6 mag; star formation rate 15 M yr1). We do not find any evidence for the presence of an active galactic nucleus. We estimate that supernova explosions in the nuclear starburst ( SN 0:2 yr1) can power the observed molecular outflow. The kinetic energy and radial momentum of the cold molecular phase of the outflow correspond to about 2% and 20%, respectively, of the supernovae output. The cold molecular outflow velocity is lower than the escape velocity, so the gas will likely return to the galaxy disk. The mass loading factor is 0.10.5, so the negative feedback owing to this star-formation-powered molecular outflow is probably limited. |
publishDate |
2016 |
dc.date.issued.fl_str_mv |
2016 |
dc.date.accessioned.fl_str_mv |
2018-05-11T02:33:24Z |
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/10183/178126 |
dc.identifier.issn.pt_BR.fl_str_mv |
0004-6361 |
dc.identifier.nrb.pt_BR.fl_str_mv |
001063445 |
identifier_str_mv |
0004-6361 001063445 |
url |
http://hdl.handle.net/10183/178126 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.ispartof.pt_BR.fl_str_mv |
Astronomy and astrophysics. Les Ulis. Vol. 594 (Oct. 2016), A81, 12 p. |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
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