The Recent Star Formation History of NGC 5102
| Title: | The Recent Star Formation History of NGC 5102 |
|---|---|
| Authors: | Beaulieu, Sylvie F., Freeman, Kenneth C., Hidalgo, Sebastian L., Norman, Colin A., Quinn, Peter J. |
| Publication Year: | 2010 |
| Collection: | Astrophysics |
| Subject Terms: | Astrophysics - Cosmology and Nongalactic Astrophysics |
| More Details: | We present Hubble Space Telescope photometry of young stars in NGC 5102, a nearby gas-rich post-starburst S0 galaxy with a bright young stellar nucleus. We use the IAC-pop/MinnIAC algorithm to derive the recent star formation history in three fields in the bulge and disk of NGC 5102. In the disk fields, the recent star formation rate has declined monotonically and is now barely detectable, but a starburst is still in progress in the bulge and has added about 2 percent to the mass of the bulge over the last 200 Myr. Other studies of star formation in NGC 5102 indicate that about 20 percent of its stellar mass was added over the past Gyr. If this is correct, then much of the stellar mass of the bulge may have formed over this period. It seems likely that this star formation was fueled by the accretion of a gas-rich system with HI mass of about 2 x 10^9 Msol which has now been almost completely converted into stars. The large mass of recently formed stars and the blue colours of the bulge suggest that the current starburst, which is now fading, may have made a significant contribution to build the bulge of NGC 5102. Comment: 36 pages, 16 figures, accepted in AJ |
| Document Type: | Working Paper |
| DOI: | 10.1088/0004-6256/139/3/984 |
| Access URL: | http://arxiv.org/abs/1001.2236 |
| Accession Number: | edsarx.1001.2236 |
| Database: | arXiv |
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| Items | – Name: Title Label: Title Group: Ti Data: The Recent Star Formation History of NGC 5102 – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Beaulieu%2C+Sylvie+F%2E%22">Beaulieu, Sylvie F.</searchLink><br /><searchLink fieldCode="AR" term="%22Freeman%2C+Kenneth+C%2E%22">Freeman, Kenneth C.</searchLink><br /><searchLink fieldCode="AR" term="%22Hidalgo%2C+Sebastian+L%2E%22">Hidalgo, Sebastian L.</searchLink><br /><searchLink fieldCode="AR" term="%22Norman%2C+Colin+A%2E%22">Norman, Colin A.</searchLink><br /><searchLink fieldCode="AR" term="%22Quinn%2C+Peter+J%2E%22">Quinn, Peter J.</searchLink> – Name: DatePubCY Label: Publication Year Group: Date Data: 2010 – Name: Subset Label: Collection Group: HoldingsInfo Data: Astrophysics – Name: Subject Label: Subject Terms Group: Su Data: <searchLink fieldCode="DE" term="%22Astrophysics+-+Cosmology+and+Nongalactic+Astrophysics%22">Astrophysics - Cosmology and Nongalactic Astrophysics</searchLink> – Name: Abstract Label: Description Group: Ab Data: We present Hubble Space Telescope photometry of young stars in NGC 5102, a nearby gas-rich post-starburst S0 galaxy with a bright young stellar nucleus. We use the IAC-pop/MinnIAC algorithm to derive the recent star formation history in three fields in the bulge and disk of NGC 5102. In the disk fields, the recent star formation rate has declined monotonically and is now barely detectable, but a starburst is still in progress in the bulge and has added about 2 percent to the mass of the bulge over the last 200 Myr. Other studies of star formation in NGC 5102 indicate that about 20 percent of its stellar mass was added over the past Gyr. If this is correct, then much of the stellar mass of the bulge may have formed over this period. It seems likely that this star formation was fueled by the accretion of a gas-rich system with HI mass of about 2 x 10^9 Msol which has now been almost completely converted into stars. The large mass of recently formed stars and the blue colours of the bulge suggest that the current starburst, which is now fading, may have made a significant contribution to build the bulge of NGC 5102.<br />Comment: 36 pages, 16 figures, accepted in AJ – Name: TypeDocument Label: Document Type Group: TypDoc Data: Working Paper – Name: DOI Label: DOI Group: ID Data: 10.1088/0004-6256/139/3/984 – Name: URL Label: Access URL Group: URL Data: <link linkTarget="URL" linkTerm="http://arxiv.org/abs/1001.2236" linkWindow="_blank">http://arxiv.org/abs/1001.2236</link> – Name: AN Label: Accession Number Group: ID Data: edsarx.1001.2236 |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1088/0004-6256/139/3/984 Subjects: – SubjectFull: Astrophysics - Cosmology and Nongalactic Astrophysics Type: general Titles: – TitleFull: The Recent Star Formation History of NGC 5102 Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Beaulieu, Sylvie F. – PersonEntity: Name: NameFull: Freeman, Kenneth C. – PersonEntity: Name: NameFull: Hidalgo, Sebastian L. – PersonEntity: Name: NameFull: Norman, Colin A. – PersonEntity: Name: NameFull: Quinn, Peter J. IsPartOfRelationships: – BibEntity: Dates: – D: 13 M: 01 Type: published Y: 2010 |
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