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arXiv:0711.4372 (astro-ph)
[Submitted on 27 Nov 2007]

Title:The elliptical galaxy NGC 5044: Stellar population and ionized gas

Authors:M. G. Rickes, M.G. Pastoriza, Ch Bonatto
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Abstract: In this work we investigate the stellar population, metallicity distribution and ionized gas in the elliptical galaxy NGC 5044, using long-slit spectroscopy and a stellar population synthesis method. We found differences in the slope of metal-line profiles along the galaxy which suggests an enhancement of alpha elements, particularly towards the central region. The presence of a non-thermal ionization source, such as a low-luminosity AGN and/or shock ionization, is implied by the large values of the ratio (N II])Ha observed in all sampled regions. However, the emission lines observed in the external regions indicate the presence of an additional ionization source, probably hot, post-AGB stars.
Comments: Accepted by A&A
Subjects: Astrophysics (astro-ph)
Report number: 0004-6361
Cite as: arXiv:0711.4372 [astro-ph]
  (or arXiv:0711.4372v1 [astro-ph] for this version)
  https://doi.org/10.48550/arXiv.0711.4372
Related DOI: https://doi.org/10.1051/0004-6361%3A20034302

Submission history

From: Mauro Rickes Cristian Garcia [view email]
[v1] Tue, 27 Nov 2007 22:03:02 UTC (349 KB)
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