Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The pre-processing of subhaloes in SDSS groups and clusters   We investigate pre-processing using the observed quenched fraction of group
and cluster galaxies in the Yang et al. (2007) SDSS-DR7 group catalogue in the
redshift range of 0.01 < z < 0.045. We categorize group galaxies as virialized,
infall or backsplash and we apply a combination of the Dressler-Shectman
statistic and group member velocities to identify subhaloes. On average the
fraction of galaxies that reside in subhaloes is a function of host halo mass,
where more massive systems have a higher fraction of subhalo galaxies both in
the overall galaxy and infall populations. Additionally, we find that between 2
< r_200 < 3 the quiescent fraction is higher in the subhalo population with
respect to both the field and non-subhalo populations. At these large radii (2
< r_200 < 3), the majority of galaxies (~ 80 %) belong to the infall population
and therefore, we attribute the enhanced quenching to infalling subhalo
galaxies, indicating that pre-processing has occurred in the subhalo
population. We conclude that pre-processing plays a significant role in the
observed quiescent fraction, but only for the most massive (M_halo > 10^14.5
M_sun) systems in our sample.

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The categories of this paper are: chao-dyn
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The categories of this paper are: hep-th
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The categories of this paper are: alg-geom
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The categories of this paper are: ao-sci
0
The categories of this paper are: hep-ph
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The categories of this paper are: comp-gas
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The categories of this paper are: funct-an
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The categories of this paper are: eess
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The categories of this paper are: q-bio
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The categories of this paper are: dg-ga
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The categories of this paper are: hep-lat
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The categories of this paper are: q-alg
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The categories of this paper are: gr-qc
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The categories of this paper are: patt-sol
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The categories of this paper are: chem-ph
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The categories of this paper are: supr-con