THE MODELLING OF THE MASS-METALLICITY RELATION FOR THE LOCAL GROUP DWARF GALAXIES

Автор(и)

  • M. V. Ryabova Southern Federal University, Rostov-on-Don, Russia, Російська Федерація
  • Yu. A. Shchekinov Southern Federal University, Rostov-on-Don, Russia; Special Astrophysical Observatory, Nizhnyi Arkhyz, Russia, Російська Федерація

DOI:

https://doi.org/10.18524/1810-4215.2008.21.86871

Ключові слова:

Dwarf galaxy, local group, mass-metallicity relation.

Анотація

We present results of modelling of the mass-metallicity relation for the Local Group dwarf spheroidal (dSph) galaxies. In this work, we use a single-zone chemo-dynamical model. Our model is based on the scheme suggested by C. Firmani and A. Tutukov (1992). The behaviour of the dark-to-visible mass ratio has been taken from M.-M. Mac Low & A. Ferrara (1998). We have considered two classes of models: open and closed. The obtained mass- metallicity relation for the open model shows that the galaxies can be divided into two distinct classes: low-mass (Mtot < 108Msun) and high-mass (Mtot > 108Msun) groups which agrees with observation data.

Посилання

Firmani C., Tutukov A.V.: 1992, Astron. Astrophys., 264, 37.

Mac Low M.-M., Ferrara A.: 1999, Astrophys. J., 513, 142.

Ferrara A., Pettini M., Shshekinov Yu.A.: 2000, Mon. Not. R. Astron. Soc., 319, 539.

Tamura N., Hirashita H., Takeuchi T.T.: 2001, Astrophys. J., 552, 113

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Опубліковано

2008-12-20

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