On the connection between shape and stellar population in early-type galaxies

M. D'Onofrio; T. Valentinuzzi; G. Fasano; A. Moretti; D. Bettoni; B. M. Poggianti; B. Vulcani; J. Varela; J. Fritz; A. Cava; P. Kjaergaard; M. Moles; W. J. Couch; A. Dreller

doi:10.1088/2041-8205/727/1/L6

On the connection between shape and stellar population in early-type galaxies

Cosmology and Nongalactic Astrophysics 2015-05-20 v1

Authors: M. D'Onofrio , T. Valentinuzzi , G. Fasano , A. Moretti , D. Bettoni , B. M. Poggianti , B. Vulcani , J. Varela , J. Fritz , A. Cava , P. Kjaergaard , M. Moles , W. J. Couch , A. Dreller

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Abstract

We report on the discovery of a relation between the stellar mass $M^*$ of early-type galaxies (hereafter ETGs), their shape, as parametrized by the Sersic index $n$ , and their stellar mass-to-light ratio $M^*/L$ . In a 3D log space defined by these variables the ETGs populate a plane surface with small scatter. This relation tells us that galaxy shape and stellar population are not independent physical variables, a result that must be accounted for by theories of galaxy formation and evolution.

Keywords

early-type galaxies galaxy formation and evolution stellar populations in galaxies

Cite

@article{arxiv.1010.4174,
  title  = {On the connection between shape and stellar population in early-type galaxies},
  author = {M. D'Onofrio and T. Valentinuzzi and G. Fasano and A. Moretti and D. Bettoni and B. M. Poggianti and B. Vulcani and J. Varela and J. Fritz and A. Cava and P. Kjaergaard and M. Moles and W. J. Couch and A. Dreller},
  journal= {arXiv preprint arXiv:1010.4174},
  year   = {2015}
}

Comments

7 pages, 2 figures. Accepted on ApJL

On the connection between shape and stellar population in early-type galaxies

Abstract

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