2015MNRAS.451.1090S


C.D.S. - SIMBAD4 rel 1.7 - 2019.11.17CET19:57:14

2015MNRAS.451.1090S - Mon. Not. R. Astron. Soc., 451, 1090-1103 (2015/July-3)

New chemical evolution analytical solutions including environment effects.

SPITONI E.

Abstract (from CDS):

In the last years, more and more interest has been devoted to analytical solutions, including inflow and outflow, to study the metallicity enrichment in galaxies. In this framework, we assume a star formation rate which follows a linear Schmidt law, and we present new analytical solutions for the evolution of the metallicity (Z) in galaxies. In particular, we take into account environmental effects including primordial and enriched gas infall, outflow, different star formation efficiencies and galactic fountains. The enriched infall is included to take into account galaxy-galaxy interactions. Our main results can be summarized as: (i) when a linear Schmidt law of star formation is assumed, the resulting time evolution of the metallicity Z is the same either for a closed-box model or for an outflow model. (ii) The mass-metallicity relation for galaxies which suffer a chemically enriched infall, originating from another evolved galaxy with no pre-enriched gas, is shifted down in parallel at lower Z values, if compared to the closed box model. (iii) When a galaxy suffers at the same time a primordial infall and a chemically enriched one, the primordial infall always dominates the chemical evolution. (iv) We present new solutions for the metallicity evolution in a galaxy which suffers galactic fountains and an enriched infall from another galaxy at the same time. The analytical solutions presented here can be very important to study the metallicity (oxygen), which is measured in high-redshift objects. These solutions can be very useful: (a) in the context of cosmological semi-analytical models for galaxy formation and evolution, and (b) for the study of compact groups of galaxies.

Abstract Copyright: © 2015 The Author Published by Oxford University Press on behalf of the Royal Astronomical Society (2015)

Journal keyword(s): galaxies: abundances - galaxies: evolution - galaxies: ISM

Simbad objects: 5

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Number of rows : 5

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 NAME M 81-82 Group GrG 09 55 +69.1           ~ 616 0
2 M 81 Sy2 09 55 33.17306143 +69 03 55.0609270   7.89 6.94     ~ 3893 5
3 M 82 IG 09 55 52.430 +69 40 46.93 9.61 9.30 8.41     ~ 5222 6
4 NGC 3077 GiP 10 03 19.0965510921 +68 44 01.556166166 11.23 10.85 10.14 9.74   ~ 671 0
5 NAME Local Group GrG ~ ~           ~ 6679 0

    Equat.    Gal    SGal    Ecl

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2019.11.17-19:57:14

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