Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Satellite Ecology: The Dearth of Environment Dependence   Using the Sloan Digital Sky Survey (SDSS) galaxy group catalogue of Yang et
al. (2007), we study the average colour and average concentration of satellite
galaxies as function of (i) their stellar mass, (ii) their group mass, and
(iii) their group-centric radius. We find that the colours and concentrations
of satellite galaxies are (almost) completely determined by their stellar mass.
In particular, at fixed stellar mass, the average colours and concentrations of
satellite galaxies are independent of either halo mass or halo-centric radius.
We find clear evidence for mass segregation of satellite galaxies in haloes of
all masses, and argue that this explains why satellites at smaller halo-centric
radii are somewhat redder and somewhat more concentrated. In addition, the weak
colour and concentration dependence of satellite galaxies on halo mass is
simply a reflection of the fact that more massive haloes host, on average, more
massive satellites. Combining these results with the fact that satellite
galaxies are, on average, redder and somewhat more concentrated than central
galaxies of the same stellar mass, the following picture emerges: galaxies
become redder and somewhat more concentrated once they fall into a bigger halo
(i.e., once they become a satellite galaxy). This is a clear manifestation of
environment dependence. However, there is no indication that the magnitude of
the transformation (or its timescale) depends on environment; a galaxy
undergoes a transition when it becomes a satellite, but it does not matter
whether it becomes a satellite of a small (Milky Way sized) halo, or of a
massive cluster. We discuss the implication of this `dearth' of environment
dependence for the physical processes responsible for transforming satellite
galaxies.

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The categories of this paper are: q-fin
12
The categories of this paper are: nucl-th
10
The categories of this paper are: q-bio
4
The categories of this paper are: cond-mat
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The categories of this paper are: chao-dyn
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The categories of this paper are: funct-an
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The categories of this paper are: acc-phys
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The categories of this paper are: atom-ph
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The categories of this paper are: eess
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The categories of this paper are: chem-ph
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The categories of this paper are: solv-int
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The categories of this paper are: hep-lat
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The categories of this paper are: ao-sci
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The categories of this paper are: adap-org
2
The categories of this paper are: math
1
The categories of this paper are: cs