Hostname: page-component-8448b6f56d-42gr6 Total loading time: 0 Render date: 2024-04-16T08:54:06.181Z Has data issue: false hasContentIssue false
  • English
  • Français

The chemical history of the nearest starburst galaxy – IC10

Published online by Cambridge University Press:  09 March 2010

Denise R. Gonçalves  and
Laura Magrini
Denise R. Gonçalves
Affiliation:
UFRJ - Observatório do Valongo, Ladeira Pedro Antonio 43, 20080-090 Rio de Janeiro, Brazil email: denise@astro.ufrj.br
Laura Magrini
Affiliation:
INAF - Osservatorio Astrofisico di Arcetri, Largo E. Fermi 5, I-50125 Firenze, Italy email: laura@arcetri.astro.it
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.

The irregular dwarf galaxy IC10 is located within the Local Group (LG) at a distance of 750 kpc. Although several studies have revealed the existence of stellar populations with a broad range of ages, its star formation history (SFH) and age-metallicity (AM) relationship remain quite unknown. In this contribution we present our spectroscopic investigation of 15 H ii regions, 9 planetary nebulae (PNe) and 1 symbiotic star –so far the farthest known symbiotic binary. Our main goal is to reconstruct the SFH of IC10 and to constrain its AM relationship using young and intermediate-age stars. The direct availability of the electron temperature in our emission-line spectra allows an accurate determination of the IC10 metallicity map at two different epochs. We find a non-homogeneous distribution of metals at both epochs, but similar average abundances for the two analyzed populations. The derived AM relationship shows a little global enrichment, which is interpreted as due to the loss of metals by supernovae winds and to differential gas outflows. Our results bring strong observational constraints to the chemical enrichment history of IC10, the formation of dwarf irregular galaxies and the evolution of the LG as well.

Keywords

galaxies: abundancesgalaxies: evolutionLocal GroupPNeHII regions
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. 159 - 162
Copyright
Copyright © International Astronomical Union 2010

References

Gonçalves, D. R., Magrini, L., Leisy, P, & Corradi, R. L. M., 2007, MNRAS, 375, 715CrossRefGoogle Scholar
Gonçalves, D. R., Magrini, L., Munari, U., Corradi, R. L. M., & Costa, R. D. D., 2008, MNRAS, 391, L84CrossRefGoogle Scholar
Hodge, P. & Lee, M. G. 1990, PASP, 102, 26CrossRefGoogle Scholar
Izotov, Y. I., Stasinska, G., Meynet, G., Guseva, N. G., & Thuan, T. X., 2006, A&A, 448, 955Google Scholar
Iben, I. Jr. & Renzini, A., 1983, ARA&A, 21, 271Google Scholar
Kingsburgh, R. L. & Barlow, M. J., 1994, MNRAS, 271, 257CrossRefGoogle Scholar
Kniazev, A. Y., Grebel, E. K., Pustilnik, S. A., Pramskij, A. G., Zucker, D. B., 2005, AJ, 130, 1558CrossRefGoogle Scholar
Kniazev, A. Y., Pustilnik, S. A., & Zucker, D. B., 2008, MNRAS, 384, 1045CrossRefGoogle Scholar
Kormendy, J, & Djorgovski, S., 1989, ARA&A, 27, 235Google Scholar
Lee, H., Skillman, E. D., Cannon, J. M., Jackson, D. C., Gehrz, R. D., Polomski, E. F., Woodward, C. E., 2006, ApJ, 647, 970CrossRefGoogle Scholar
Mac Low, M.-M. & Ferrara, A., 1999, ApJ, 513, 142CrossRefGoogle Scholar
Magrini, L., Corradi, R. M. L., Greimel, R., Leisy, P., & Lennon, D. J., 2003, A&A, 407, 51Google Scholar
Magrini, L.Leisy, P., Corradi, R. M. L., Perinotto, M., Mampaso, A. & Vílchez, J. M., 2005, A&A, 443, 115Google Scholar
Magrini, L. & Gonçalves, D. R., 2009, MNRAS, 398, 280CrossRefGoogle Scholar
Recchi, S., Spitoni, E., Matteucci, F., & Lanfranchi, G. A., 2008, A&A, 489, 555Google Scholar
Richer, M. G. & McCall, M. L., 1995, ApJ, 445, 642CrossRefGoogle Scholar
Richer, M. G., Bullejos, A., Borissova, J., McCall, M. L., Lee, H., Kurtev, R., Georgiev, L., Kingsburgh, R. L., Ross, R., & Rosado, M., 2001, A&A, 370, 34Google Scholar
Richer, M. G. & McCall, M. L., 2007, ApJ, 658, 328CrossRefGoogle Scholar
Shaw, R. A. & Dufour, R. J., 1994, ASPC, 61, 327Google Scholar
Skillman, E. D., Kennicutt, R. C., & Hodge, P. W., 1989, ApJ, 347, 875CrossRefGoogle Scholar
Stasińska, G. 2002, ‘Abundance determinations in HII regions and planetary nebulae’, astro-ph/0207500Google Scholar
Van Zee, L., Skillman, E. D., & Haynes, M. P., 2006, ApJ, 637, 269CrossRefGoogle Scholar