The SAMI galaxy survey:The discovery of a luminous, low-metallicity HII complex in the dwarf galaxy GAMA J141103.98-003242.3
We present the discovery of a luminous unresolved HII complex on the edge of dwarf galaxy GAMA J141103.98-003242.3 using data from the Sydney-AAO Multi-object Integral field spectrograph (SAMI) Galaxy Survey. This dwarf galaxy is situated at a distance of ~100 Mpc and contains an unresolved region o...
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ftmacquarieunicr:oai:https://researchers.mq.edu.au:publications/853a4c63-8dbc-429f-add6-e9144f53f472 2024-09-15T18:33:13+00:00 The SAMI galaxy survey:The discovery of a luminous, low-metallicity HII complex in the dwarf galaxy GAMA J141103.98-003242.3 Richards, S. N. Schaefer, A. L. López-Sánchez, A. R. Croom, S. M. Bryant, J. J. Sweet, S. M. Konstantopoulos, I. S. Allen, J. T. Bland-Hawthorn, J. Bloom, J. V. Brough, S. Fogarty, L. M.R. Goodwin, M. Green, A. W. Ho, I. T. Kewley, L. J. Koribalski, B. S. Lawrence, J. S. Owers, M. S. Sadler, E. M. Sharp, R. 2014-12-01 https://researchers.mq.edu.au/en/publications/853a4c63-8dbc-429f-add6-e9144f53f472 https://doi.org/10.1093/mnras/stu1820 http://www.scopus.com/inward/record.url?scp=84940363763&partnerID=8YFLogxK eng eng info:eu-repo/semantics/closedAccess Richards , S N , Schaefer , A L , López-Sánchez , A R , Croom , S M , Bryant , J J , Sweet , S M , Konstantopoulos , I S , Allen , J T , Bland-Hawthorn , J , Bloom , J V , Brough , S , Fogarty , L M R , Goodwin , M , Green , A W , Ho , I T , Kewley , L J , Koribalski , B S , Lawrence , J S , Owers , M S , Sadler , E M & Sharp , R 2014 , ' The SAMI galaxy survey : The discovery of a luminous, low-metallicity HII complex in the dwarf galaxy GAMA J141103.98-003242.3 ' , Monthly Notices of the Royal Astronomical Society , vol. 445 , no. 2 , pp. 1104-1113 . https://doi.org/10.1093/mnras/stu1820 article 2014 ftmacquarieunicr https://doi.org/10.1093/mnras/stu1820 2024-07-03T23:41:10Z We present the discovery of a luminous unresolved HII complex on the edge of dwarf galaxy GAMA J141103.98-003242.3 using data from the Sydney-AAO Multi-object Integral field spectrograph (SAMI) Galaxy Survey. This dwarf galaxy is situated at a distance of ~100 Mpc and contains an unresolved region of HII emission that contributes ~70 per cent of the galaxy's Hα luminosity, located at the top end of established HII region luminosity functions. For the HII complex, we measure a star formation rate of 0.147 ± 0.041 M⊙ yr -1 and a metallicity of 12+log(O/H) = 8.01 ± 0.05 that is lower than the rest of the galaxy by ~0.2 dex. Data from the HI Parkes All-Sky Survey (HIPASS) indicate the likely presence of neutral hydrogen in the galaxy to potentially fuel ongoing and future star-forming events. We discuss various triggering mechanisms for the intense star formation activity of this HII complex, where the kinematics of the ionized gas are well described by a rotating disc and do not show any features indicative of interactions. We showthat SAMI is an ideal instrument to identify similar systems to GAMA J141103.98-003242.3, and the SAMI Galaxy Survey is likely to find many more of these systems to aid in the understanding of their formation and evolution. Article in Journal/Newspaper sami Macquarie University Research Portal Monthly Notices of the Royal Astronomical Society 445 2 1104 1113 |
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description |
We present the discovery of a luminous unresolved HII complex on the edge of dwarf galaxy GAMA J141103.98-003242.3 using data from the Sydney-AAO Multi-object Integral field spectrograph (SAMI) Galaxy Survey. This dwarf galaxy is situated at a distance of ~100 Mpc and contains an unresolved region of HII emission that contributes ~70 per cent of the galaxy's Hα luminosity, located at the top end of established HII region luminosity functions. For the HII complex, we measure a star formation rate of 0.147 ± 0.041 M⊙ yr -1 and a metallicity of 12+log(O/H) = 8.01 ± 0.05 that is lower than the rest of the galaxy by ~0.2 dex. Data from the HI Parkes All-Sky Survey (HIPASS) indicate the likely presence of neutral hydrogen in the galaxy to potentially fuel ongoing and future star-forming events. We discuss various triggering mechanisms for the intense star formation activity of this HII complex, where the kinematics of the ionized gas are well described by a rotating disc and do not show any features indicative of interactions. We showthat SAMI is an ideal instrument to identify similar systems to GAMA J141103.98-003242.3, and the SAMI Galaxy Survey is likely to find many more of these systems to aid in the understanding of their formation and evolution. |
format |
Article in Journal/Newspaper |
author |
Richards, S. N. Schaefer, A. L. López-Sánchez, A. R. Croom, S. M. Bryant, J. J. Sweet, S. M. Konstantopoulos, I. S. Allen, J. T. Bland-Hawthorn, J. Bloom, J. V. Brough, S. Fogarty, L. M.R. Goodwin, M. Green, A. W. Ho, I. T. Kewley, L. J. Koribalski, B. S. Lawrence, J. S. Owers, M. S. Sadler, E. M. Sharp, R. |
spellingShingle |
Richards, S. N. Schaefer, A. L. López-Sánchez, A. R. Croom, S. M. Bryant, J. J. Sweet, S. M. Konstantopoulos, I. S. Allen, J. T. Bland-Hawthorn, J. Bloom, J. V. Brough, S. Fogarty, L. M.R. Goodwin, M. Green, A. W. Ho, I. T. Kewley, L. J. Koribalski, B. S. Lawrence, J. S. Owers, M. S. Sadler, E. M. Sharp, R. The SAMI galaxy survey:The discovery of a luminous, low-metallicity HII complex in the dwarf galaxy GAMA J141103.98-003242.3 |
author_facet |
Richards, S. N. Schaefer, A. L. López-Sánchez, A. R. Croom, S. M. Bryant, J. J. Sweet, S. M. Konstantopoulos, I. S. Allen, J. T. Bland-Hawthorn, J. Bloom, J. V. Brough, S. Fogarty, L. M.R. Goodwin, M. Green, A. W. Ho, I. T. Kewley, L. J. Koribalski, B. S. Lawrence, J. S. Owers, M. S. Sadler, E. M. Sharp, R. |
author_sort |
Richards, S. N. |
title |
The SAMI galaxy survey:The discovery of a luminous, low-metallicity HII complex in the dwarf galaxy GAMA J141103.98-003242.3 |
title_short |
The SAMI galaxy survey:The discovery of a luminous, low-metallicity HII complex in the dwarf galaxy GAMA J141103.98-003242.3 |
title_full |
The SAMI galaxy survey:The discovery of a luminous, low-metallicity HII complex in the dwarf galaxy GAMA J141103.98-003242.3 |
title_fullStr |
The SAMI galaxy survey:The discovery of a luminous, low-metallicity HII complex in the dwarf galaxy GAMA J141103.98-003242.3 |
title_full_unstemmed |
The SAMI galaxy survey:The discovery of a luminous, low-metallicity HII complex in the dwarf galaxy GAMA J141103.98-003242.3 |
title_sort |
sami galaxy survey:the discovery of a luminous, low-metallicity hii complex in the dwarf galaxy gama j141103.98-003242.3 |
publishDate |
2014 |
url |
https://researchers.mq.edu.au/en/publications/853a4c63-8dbc-429f-add6-e9144f53f472 https://doi.org/10.1093/mnras/stu1820 http://www.scopus.com/inward/record.url?scp=84940363763&partnerID=8YFLogxK |
genre |
sami |
genre_facet |
sami |
op_source |
Richards , S N , Schaefer , A L , López-Sánchez , A R , Croom , S M , Bryant , J J , Sweet , S M , Konstantopoulos , I S , Allen , J T , Bland-Hawthorn , J , Bloom , J V , Brough , S , Fogarty , L M R , Goodwin , M , Green , A W , Ho , I T , Kewley , L J , Koribalski , B S , Lawrence , J S , Owers , M S , Sadler , E M & Sharp , R 2014 , ' The SAMI galaxy survey : The discovery of a luminous, low-metallicity HII complex in the dwarf galaxy GAMA J141103.98-003242.3 ' , Monthly Notices of the Royal Astronomical Society , vol. 445 , no. 2 , pp. 1104-1113 . https://doi.org/10.1093/mnras/stu1820 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1093/mnras/stu1820 |
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Monthly Notices of the Royal Astronomical Society |
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445 |
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2 |
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1104 |
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