Bibcode
Cebrián, M.; Trujillo, I.
Referencia bibliográfica
Highlights of Spanish Astrophysics VIII, Proceedings of the XI Scientific Meeting of the Spanish Astronomical Society held on September 8-12, 2014, in Teruel, Spain, ISBN 978-84-606-8760-3. A. J. Cenarro, F. Figueras, C. Hernández-Monteagudo, J. Trujillo Bueno, and L. Valdivielso (eds.), p. 166-171
Fecha de publicación:
5
2015
Número de citas
0
Número de citas referidas
0
Descripción
The different evolutionary paths followed by the galaxies along their
lives are expected to leave an imprint in their sizes. Nevertheless,
observationally the role that the environment plays on shaping the
galaxies is still unclear. Taking advantage of the great statistics
provided by SDSS data, we address this question using a mass-complete
sample of 232000 objects. We study the stellar mass-size relation of
galaxies in the field and in clusters in the nearby Universe. Our
results show that galaxies are slightly smaller in high-density regions
at a fixed stellar mass. This difference is of ˜7.5 per cent for
late-type galaxies and ˜3.5 per cent for early-type galaxies.
Moreover, the scatter of the relation is also smaller in clusters than
in the field, with differences of ˜0.8 per cent for late-type
galaxies and ˜3.5 per cent for early-type galaxies. These results
point towards an earlier formation of the galaxies in high-density
environments as well as to an evolution from a more homogeneous family
of progenitors than those inhabiting less dense environments.