Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 1973
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1973ap%26ss..25..413h&link_type=abstract
Astrophysics and Space Science, Volume 25, Issue 2, pp.413-432
Astronomy and Astrophysics
Astrophysics
Scientific paper
It is argued that a Salpeter initial luminosity function is consistent with the observed integral properties of giant elliptical galaxies if the gaseous material lost by evolving stars can be retained in the system for times of the order of 108 yr. One model which emerges is of a highly condensed system consisting mainly of metal-poor population II stars with an admixture (1.5% 15%) of super-metalrich stars born from the gaseous debris, which at the present time constitutes 0.05% 0.5% of the total mass. HighM/L ratios result from obscuration of the starlight, and the missing radiation reappears in the form of a strong I-R flux at wavelengths of the order of 100 μ. The difference in colour betweengE anddE galaxies is explained in terms of interstellar reddening, and strong interstellar metallic absorption lines are also expected. The model leads to a negligible evolutionary correction to the cosmological deceleration parameterq 0. An alternative model, in which the stars arenot metal poor, has a more condensed, heavily obscured nucleus, surrounded by the unobscured central bulge of the Galaxy which provides most of the light. In this version a large evolutionary correction would be required.
No associations
LandOfFree
Giant Elliptical Galaxies: The Salpeter Initial Luminosity Function and Interstellar Matter does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Giant Elliptical Galaxies: The Salpeter Initial Luminosity Function and Interstellar Matter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Giant Elliptical Galaxies: The Salpeter Initial Luminosity Function and Interstellar Matter will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1311880