Metallicity and gas mass fraction in irregulars and blue compact galaxies - The effect of dark matter

Details Metallicity and gas mass fraction in irregulars and blue compact galaxies - The effect of dark matter Metallicity and gas mass fraction in irregulars and blue compact galaxies - The effect of dark matter

Apr 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992a%26a...257..511k&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 257, no. 2, p. 511-514.

Astronomy and Astrophysics

Astrophysics

8

Compact Galaxies, Dark Matter, Interstellar Matter, Irregular Galaxies, Metallicity, Astronomical Models, Chemical Evolution, Galactic Evolution, Mass To Light Ratios

Scientific paper

We present an attempt to explain the widespread distribution of irregulars and blue compact galaxies in the metallicity (Z) - gas mass fraction (mu) diagram in the framework of the closed-box model of chemical evolution. The differences in Z for the same value of mu among galaxies are ascribable to those in the mass fraction of dark matter which does not participate in the chemical evolution. We evaluate the mass fraction of dark matter for each galaxy required for the simple model to yield the observed metallicity Z for the observed gas mass fraction mu. If a chemical yield of y = 0.01 is adopted, the dark-matter fraction shows good correlations with the mass-luminosity ratio and the dark-matter fraction obtained independently of the chemical evolution. These results lead to the following suggestions: these galaxies contain various fractions of dark matter which do not take part in the chemical evolution; their Z-mu relation follows that of the simple model modified to include the dark matter; and the chemical yield of these galaxies is close to that conventionally used for the chemical evolution of the solar neighborhood.

Affiliated with

Also associated with

No associations

Rating

Metallicity and gas mass fraction in irregulars and blue compact galaxies - The effect of dark 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 Metallicity and gas mass fraction in irregulars and blue compact galaxies - The effect of dark matter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Metallicity and gas mass fraction in irregulars and blue compact galaxies - The effect of dark matter will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1731813