RT Journal Article
T1 Characterizing the satellites of massive galaxies up to z ∼ 2: young populations to build the outskirts of nearby massive galaxies
A1 Mármol Queraltó, E.
A1 Trujillo, I.
A1 Villar, V.
A1 Barro, G.
A1 Pérez González, Pablo Guillermo
AB The accretion of minor satellites is currently proposed as the most likely mechanism to explain the significant size evolution of the massive galaxies during the last ∼10 Gyr. In this paper, we investigate the rest-frame colours and the average stellar ages of satellites found around massive galaxies (M_star ∼ 10^11 M_⊙) since z ∼ 2. We find that the satellites have bluer colours than their central galaxies. When exploring the stellar ages of the galaxies, we find that the satellites have similar ages to the massive galaxies that host them at high redshifts, while at lower redshifts they are, on average, ≳1.5 Gyr younger. If our satellite galaxies create the envelope of nearby massive galaxies, our results would be compatible with the idea that the outskirts of those galaxies are slightly younger, metal-poorer and with lower [α/Fe] abundance ratios than their inner regions.
PB Wiley
SN 0035-8711
YR 2013
FD 2013-02
LK https://hdl.handle.net/20.500.14352/35213
UL https://hdl.handle.net/20.500.14352/35213
LA eng
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NO © 2012 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. We thank the anonymous referee for a constructive reading of the manuscript that helped us to improve the quality of the paper. Authors are grateful to Alexandre Vazdekis, Elena Ricciardelli and Ignacio Ferreras for fruitful discussions. This work has been supported by the 'Programa Nacional de Astronomía y Astrofísica' of the Spanish Ministry of Science and Innovation under grant AYA2010-21322-C03-02. PGP-G, GB and VV acknowledge support from the Spanish Programa Nacional de Astronomía y Astrofísica under grants AYA2009-10368, AYA2009-07723-E and CSD2006-00070. This work has made use of the Rainbow Cosmological Surveys Database, which is operated by the Universidad Complutense de Madrid (UCM).
NO Ministerio de Ciencia e Innovación (MICINN)
NO Programa Nacional de Astronomía y Astrofísica (PNAyA), España
DS Docta Complutense
RD 30 abr 2024