AN INITIAL MASS FUNCTION STUDY OF THE DWARF STARBURST GALAXY NGC 4214
The production rate of ionizing photons in young (≤8 Myr), unresolved stellar clusters in the nearby irregular galaxy NGC 4214 is probed using multi-wavelength Hubble Space Telescope WFC3 data. We normalize the ionizing photon rate by the cluster mass to investigate the upper end of the stellar init...
| Main Authors: | , , , , , , , , , , , , , |
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| Format: | Article |
| Language: | en_US |
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Institute of Physics/American Astronomical Society
2015
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| Online Access: | http://hdl.handle.net/1721.1/95421 |
| _version_ | 1811094439568867328 |
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| author | Andrews, J. E. Calzetti, D. Chandar, R. Lee, J. C. Elmegreen, B. G. Kennicutt, R. C. Whitmore, B. Kissel, Jeffrey S. da Silva, Robert L. Krumholz, Mark R. O'Connell, R. W. Dopita, M. A. Frogel, Jay A. Kim, Hwihyun |
| author2 | MIT Kavli Institute for Astrophysics and Space Research |
| author_facet | MIT Kavli Institute for Astrophysics and Space Research Andrews, J. E. Calzetti, D. Chandar, R. Lee, J. C. Elmegreen, B. G. Kennicutt, R. C. Whitmore, B. Kissel, Jeffrey S. da Silva, Robert L. Krumholz, Mark R. O'Connell, R. W. Dopita, M. A. Frogel, Jay A. Kim, Hwihyun |
| author_sort | Andrews, J. E. |
| collection | MIT |
| description | The production rate of ionizing photons in young (≤8 Myr), unresolved stellar clusters in the nearby irregular galaxy NGC 4214 is probed using multi-wavelength Hubble Space Telescope WFC3 data. We normalize the ionizing photon rate by the cluster mass to investigate the upper end of the stellar initial mass function (IMF). We have found that within the uncertainties the upper end of the stellar IMF appears to be universal in this galaxy, and that deviations from a universal IMF can be attributed to stochastic sampling of stars in clusters with masses lap103 M ☉. Furthermore, we have found that there does not seem to be a dependence of the maximum stellar mass on the cluster mass. We have also found that for massive clusters, feedback may cause an underrepresentation in Hα luminosities, which needs to be taken into account when conducting this type of analysis. |
| first_indexed | 2024-09-23T16:00:05Z |
| format | Article |
| id | mit-1721.1/95421 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T16:00:05Z |
| publishDate | 2015 |
| publisher | Institute of Physics/American Astronomical Society |
| record_format | dspace |
| spelling | mit-1721.1/954212022-10-02T05:37:36Z AN INITIAL MASS FUNCTION STUDY OF THE DWARF STARBURST GALAXY NGC 4214 Andrews, J. E. Calzetti, D. Chandar, R. Lee, J. C. Elmegreen, B. G. Kennicutt, R. C. Whitmore, B. Kissel, Jeffrey S. da Silva, Robert L. Krumholz, Mark R. O'Connell, R. W. Dopita, M. A. Frogel, Jay A. Kim, Hwihyun MIT Kavli Institute for Astrophysics and Space Research Kissel, Jeffrey S. The production rate of ionizing photons in young (≤8 Myr), unresolved stellar clusters in the nearby irregular galaxy NGC 4214 is probed using multi-wavelength Hubble Space Telescope WFC3 data. We normalize the ionizing photon rate by the cluster mass to investigate the upper end of the stellar initial mass function (IMF). We have found that within the uncertainties the upper end of the stellar IMF appears to be universal in this galaxy, and that deviations from a universal IMF can be attributed to stochastic sampling of stars in clusters with masses lap103 M ☉. Furthermore, we have found that there does not seem to be a dependence of the maximum stellar mass on the cluster mass. We have also found that for massive clusters, feedback may cause an underrepresentation in Hα luminosities, which needs to be taken into account when conducting this type of analysis. National Science Foundation (U.S.) (NSF grant CAREER-0955300) National Science Foundation (U.S.) (NSF Graduate Research Fellowship) Alfred P. Sloan Foundation (Fellowship) United States. National Aeronautics and Space Administration (NASA Chandra grant) United States. National Aeronautics and Space Administration (Astrophysics Theory and Fundamental Physics, Grant NNX09AK31G) Space Telescope Science Institute (U.S.) (NASA contract NAS 5-26555) 2015-02-19T20:30:27Z 2015-02-19T20:30:27Z 2013-04 2012-11 Article http://purl.org/eprint/type/JournalArticle 0004-637X 1538-4357 http://hdl.handle.net/1721.1/95421 Andrews, J. E., D. Calzetti, R. Chandar, J. C. Lee, B. G. Elmegreen, R. C. Kennicutt, B. Whitmore, et al. “AN INITIAL MASS FUNCTION STUDY OF THE DWARF STARBURST GALAXY NGC 4214.” The Astrophysical Journal 767, no. 1 (March 25, 2013): 51. © 2013 American Astronomical Society. en_US http://dx.doi.org/10.1088/0004-637x/767/1/51 Astrophysical Journal Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf Institute of Physics/American Astronomical Society American Astronomical Society |
| spellingShingle | Andrews, J. E. Calzetti, D. Chandar, R. Lee, J. C. Elmegreen, B. G. Kennicutt, R. C. Whitmore, B. Kissel, Jeffrey S. da Silva, Robert L. Krumholz, Mark R. O'Connell, R. W. Dopita, M. A. Frogel, Jay A. Kim, Hwihyun AN INITIAL MASS FUNCTION STUDY OF THE DWARF STARBURST GALAXY NGC 4214 |
| title | AN INITIAL MASS FUNCTION STUDY OF THE DWARF STARBURST GALAXY NGC 4214 |
| title_full | AN INITIAL MASS FUNCTION STUDY OF THE DWARF STARBURST GALAXY NGC 4214 |
| title_fullStr | AN INITIAL MASS FUNCTION STUDY OF THE DWARF STARBURST GALAXY NGC 4214 |
| title_full_unstemmed | AN INITIAL MASS FUNCTION STUDY OF THE DWARF STARBURST GALAXY NGC 4214 |
| title_short | AN INITIAL MASS FUNCTION STUDY OF THE DWARF STARBURST GALAXY NGC 4214 |
| title_sort | initial mass function study of the dwarf starburst galaxy ngc 4214 |
| url | http://hdl.handle.net/1721.1/95421 |
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