Star Formation Rate and Environment in the SDSS-DR4

G. Sorrentino; A. Rifatto

Star Formation Rate and Environment in the SDSS-DR4

Astrophysics 2007-05-23 v1

Authors: G. Sorrentino , A. Rifatto

Abstract

We investigate the environmental dependence of galaxies with the star formation rate (SFR) in a complete volume limited sample of 91566 galaxies, in the redshift range $0.05 \le z \le 0.095$ , and with $M_r=-20.0$ (that is M $^*$ + 1.45), selected from the Sloan Digital Sky Survey Data Release 4 (SDSS-DR4). The environment is characterized by the local number density of galaxies, defined by the parameter $\Sigma_{N}(\frac{N}{\pi*r_{N}^{2}})$ , with N=5. We find a reletaion between the distance of the nearest neighbour and the SFR, and confirm the general trend for the SFR of decreasesing with increasing density.

Keywords

star formation in galaxies early-type galaxies galaxy formation and evolution

Cite

@article{arxiv.astro-ph/0701760,
  title  = {Star Formation Rate and Environment in the SDSS-DR4},
  author = {G. Sorrentino and A. Rifatto},
  journal= {arXiv preprint arXiv:astro-ph/0701760},
  year   = {2007}
}

Comments

Published in the Proceedings of the "I Workshop of Astronomy and Astrophysics for Students", Eds. N.R. Napolitano & M. Paolillo, Naples, 19-20 April 2006 (astro-ph/0701577)

Star Formation Rate and Environment in the SDSS-DR4

Abstract

Keywords

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