Hostname: page-component-cd9895bd7-p9bg8 Total loading time: 0 Render date: 2024-12-22T15:43:22.481Z Has data issue: false hasContentIssue false
  • English
  • Français

Stellar vs. Hii region chemical abundances in nearby galaxies

Published online by Cambridge University Press:  09 March 2010

Fabio Bresolin
Fabio Bresolin*
Affiliation:
Institute for Astronomy, 2680 Woodlawn Drive, 96822 Honolulu, HI, USA email: [email protected]
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

We have obtained new spectrophotometric data for 28 Hii regions in the spiral galaxy NGC 300, a member of the nearby Sculptor Group. The detection of several auroral lines has allowed us to measure electron temperatures and direct chemical abundances for the whole sample. We determine for the first time in this galaxy a radial gas-phase oxygen abundance gradient based solely on auroral lines. The gradient corresponds to −0.077±0.006 dex kpc−1, which agrees very well with the galactocentric trend in metallicity obtained for 29 B and A supergiants in the same galaxy. The intercept of the regression for the nebular data virtually coincides with the intercept obtained from the stellar data. This result provides increased confidence on the direct method to determine extragalactic nebular abundances.

Keywords

HII regionsISM: abundancesstars: abundancesgalaxies: abundances
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 5 , Symposium S265: Chemical Abundances in the Universe: Connecting First Stars to Planets , August 2009 , pp. 233 - 236
Copyright
Copyright © International Astronomical Union 2010

References

Bono, G., Caputo, F., Fiorentino, G., Marconi, M., & Musella, I. 2008, ApJ, 684, 102CrossRefGoogle Scholar
Bresolin, F., Kudritzki, R.-P., Mendez, R. H., & Przybilla, N. 2001, ApJ, 548, L159CrossRefGoogle Scholar
Bresolin, F., Kudritzki, R.-P., Najarro, F., Gieren, W., & Pietrzynski, G. 2002, ApJ, 577, L107CrossRefGoogle Scholar
Bresolin, F., Garnett, D. R., & Kennicutt, R. C. 2004, ApJ, 615, 228CrossRefGoogle Scholar
Bresolin, F., et al. 2006, ApJ, 648, 1007CrossRefGoogle Scholar
Bresolin, F. et al. 2009, ApJ, 700, 309CrossRefGoogle Scholar
Chiappini, C., Matteucci, F., & Romano, D. 2001, ApJ, 554, 1044CrossRefGoogle Scholar
Daflon, S. & Cunha, K. 2004, ApJ, 617, 1115CrossRefGoogle Scholar
Deharveng, L., et al. 1988, A&AS, 73, 407Google Scholar
Halliday, C., et al. 2008, A&A, 479, 417Google Scholar
Hillier, D. J. & Miller, D. L. 1998, ApJ, 496, 407CrossRefGoogle Scholar
Kennicutt, R. C., Bresolin, F., & Garnett, D. R. 2003 ApJ, 591, 801CrossRefGoogle Scholar
Kewley, L. J. & Ellison, S. L. 2008, ApJ, 681, 1183CrossRefGoogle Scholar
Kudritzki, R.-P., et al. 2008, ApJ, 681, 269CrossRefGoogle Scholar
Larsen, S. S., Origlia, L., Brodie, J., & Gallagher, J. S. 2008, MNRAS, 383, 263CrossRefGoogle Scholar
Larsen, S. S., Origlia, L., Brodie, J. P., & Gallagher, J. S. 2006, MNRAS, 368, L10CrossRefGoogle Scholar
Lee, H., Skillman, E. D., & Venn, K. A. 2006, ApJ, 642, 813CrossRefGoogle Scholar
Maeder, A. & Meynet, G. 2000, ARA&A, 38, 143Google Scholar
Magrini, L., Vilchez, J. M., Mampaso, A., Corradi, R. L. M., & Leisy, P. 2007, A&A, 470, 865Google Scholar
Maier, C., et al. . 2006, ApJ, 639, 858CrossRefGoogle Scholar
Maiolino, R., et al. 2008, A&A, 488, 463Google Scholar
Matteucci, F. & Francois, P. 1989, MNRAS, 239, 885CrossRefGoogle Scholar
McGaugh, S. S. 1991, ApJ, 380, 140CrossRefGoogle Scholar
Modjaz, M., et al. 2008, AJ, 135, 1136CrossRefGoogle Scholar
Pauldrach, A. W. A., Hoffmann, T. L., & Lennon, M. 2001, A&A, 375, 161Google Scholar
Pettini, M., et al. 2001, ApJ, 554, 981CrossRefGoogle Scholar
Pettini, M. & Pagel, B. E. J. 2004, MNRAS, 348, L59CrossRefGoogle Scholar
Puls, J., et al. 2005, A&A, 435, 669Google Scholar
Rix, S. A., et al. 2004, ApJ, 615, 98CrossRefGoogle Scholar
Rolleston, W. R. J., Smartt, S. J., Dufton, P. L., & Ryans, R. S. I. 2000, A&A, 363, 537Google Scholar
Rosolowsky, E. & Simon, J. D. 2008, ApJ, 675, 1213CrossRefGoogle Scholar
Savaglio, S., et al. 2005, ApJ, 635, 260CrossRefGoogle Scholar
Tremonti, C. A., et al. 2004, ApJ, 613, 898CrossRefGoogle Scholar
Trundle, C. & Lennon, D. J. 2005, A&A, 434, 677Google Scholar
Urbaneja, M. A., et al. 2005a, ApJ, 635, 311CrossRefGoogle Scholar
Urbaneja, M. A., et al. 2005b, ApJ, 622, 862CrossRefGoogle Scholar
Vila-Costas, M. B. & Edmunds, M. G. 1992, MNRAS, 259, 121CrossRefGoogle Scholar
Vilchez, J. M., et al. 1988, MNRAS, 235, 633CrossRefGoogle Scholar
Zaritsky, D., Kennicutt, R. C. Jr., & Huchra, J. P. 1994, ApJ, 420, 87CrossRefGoogle Scholar