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The distribution of satellites around massive galaxies at 1 < z < 3 in sFourGE/CANDELS : dependence on star formation activity

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Abstract
We study the statistical distribution of satellites around star-forming and quiescent central galaxies at 1 < z < 3 using imaging from the FourStar Galaxy Evolution Survey and the Cosmic Assembly Near-IR Deep Extragalactic Legacy Survey. The deep near-IR data select satellites down to log(M/M-circle dot) > 9 at z < 3. The radial satellite distribution around centrals is consistent with a projected Navarro-Frenk-White profile. Massive quiescent centrals, log(M/M-circle dot) > 10.78, have similar to 2 times the number of satellites compared to star-forming centrals with a significance of 2.7 sigma even after accounting for differences in the centrals' stellar-mass distributions. We find no statistical difference in the satellite distributions of intermediate-mass quiescent and star-forming centrals, 10.48 < log(M/M-circle dot) < 10.78. Compared to the Guo et al. semi-analytic model, the excess number of satellites indicates that quiescent centrals have halo masses 0.3 dex larger than star-forming centrals, even when the stellar-mass distributions are fixed. We use a simple toy model that relates halo mass and quenching, which roughly reproduces the observed quenched fractions and the differences in halo mass between star-forming and quenched galaxies only if galaxies have a quenching probability that increases with halo mass from similar to 0 for log(M-h/M-circle dot) similar to 11 to similar to 1 for log(M-h/M-circle dot) similar to 13.5. A single halo-mass quenching threshold is unable to reproduce the quiescent fraction and satellite distribution of centrals. Therefore, while halo quenching may be an important mechanism, it is unlikely to be the only factor driving quenching. It remains unclear why a high fraction of centrals remain star-forming even in relatively massive halos.
Keywords
EXTRAGALACTIC LEGACY SURVEY, BRIGHT ISOLATED GALAXIES, LUMINOUS RED, GALAXIES, DIGITAL SKY SURVEY, DARK-MATTER, QUIESCENT GALAXIES, STELLAR, MASS, ELLIPTIC GALAXIES, DENSITY PROFILE, HALO MASSES, galaxies: evolution, galaxies: halos, galaxies: high-redshift, galaxies: statistics

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Chicago
Kawinwanichakij, Lalitwadee, Casey Papovich, Ryan F Quadri, Kim-Vy H Tran, Lee R Spitler, Glenn G Kacprzak, Ivo Labbe, et al. 2014. “The Distribution of Satellites Around Massive Galaxies at 1 < z < 3 in sFourGE/CANDELS : Dependence on Star Formation Activity.” Astrophysical Journal 792 (2).
APA
Kawinwanichakij, L., Papovich, C., Quadri, R. F., Tran, K.-V. H., Spitler, L. R., Kacprzak, G. G., Labbe, I., et al. (2014). The distribution of satellites around massive galaxies at 1 < z < 3 in sFourGE/CANDELS : dependence on star formation activity. ASTROPHYSICAL JOURNAL, 792(2).
Vancouver
1.
Kawinwanichakij L, Papovich C, Quadri RF, Tran K-VH, Spitler LR, Kacprzak GG, et al. The distribution of satellites around massive galaxies at 1 < z < 3 in sFourGE/CANDELS : dependence on star formation activity. ASTROPHYSICAL JOURNAL. 2014;792(2).
MLA
Kawinwanichakij, Lalitwadee, Casey Papovich, Ryan F Quadri, et al. “The Distribution of Satellites Around Massive Galaxies at 1 < z < 3 in sFourGE/CANDELS : Dependence on Star Formation Activity.” ASTROPHYSICAL JOURNAL 792.2 (2014): n. pag. Print.
@article{8582624,
  abstract     = {We study the statistical distribution of satellites around star-forming and quiescent central galaxies at 1 < z < 3 using imaging from the FourStar Galaxy Evolution Survey and the Cosmic Assembly Near-IR Deep Extragalactic Legacy Survey. The deep near-IR data select satellites down to log(M/M-circle dot) > 9 at z < 3. The radial satellite distribution around centrals is consistent with a projected Navarro-Frenk-White profile. Massive quiescent centrals, log(M/M-circle dot) > 10.78, have similar to 2 times the number of satellites compared to star-forming centrals with a significance of 2.7 sigma even after accounting for differences in the centrals' stellar-mass distributions. We find no statistical difference in the satellite distributions of intermediate-mass quiescent and star-forming centrals, 10.48 < log(M/M-circle dot) < 10.78. Compared to the Guo et al. semi-analytic model, the excess number of satellites indicates that quiescent centrals have halo masses 0.3 dex larger than star-forming centrals, even when the stellar-mass distributions are fixed. We use a simple toy model that relates halo mass and quenching, which roughly reproduces the observed quenched fractions and the differences in halo mass between star-forming and quenched galaxies only if galaxies have a quenching probability that increases with halo mass from similar to 0 for log(M-h/M-circle dot) similar to 11 to similar to 1 for log(M-h/M-circle dot) similar to 13.5. A single halo-mass quenching threshold is unable to reproduce the quiescent fraction and satellite distribution of centrals. Therefore, while halo quenching may be an important mechanism, it is unlikely to be the only factor driving quenching. It remains unclear why a high fraction of centrals remain star-forming even in relatively massive halos.},
  articleno    = {103},
  author       = {Kawinwanichakij, Lalitwadee and Papovich, Casey and Quadri, Ryan F and Tran, Kim-Vy H and Spitler, Lee R and Kacprzak, Glenn G and Labbe, Ivo and Straatman, Caroline and Glazebrook, Karl and Allen, Rebecca and Cowley, Michael and Dave, Romeel and Dekel, Avishai and Ferguson, Henry C and Hartley, WG and Koekemoer, Anton M and Koo, David C and Lu, Yu and Mehrtens, Nicola and Nanayakkara, Themiya and Persson, S Eric and Rees, Glen and Salmon, Brett and Tilvi, Vithal and Tomczak, Adam R and van Dokkum, Pieter},
  issn         = {0004-637X},
  journal      = {ASTROPHYSICAL JOURNAL},
  keywords     = {EXTRAGALACTIC LEGACY SURVEY,BRIGHT ISOLATED GALAXIES,LUMINOUS RED,GALAXIES,DIGITAL SKY SURVEY,DARK-MATTER,QUIESCENT GALAXIES,STELLAR,MASS,ELLIPTIC GALAXIES,DENSITY PROFILE,HALO MASSES,galaxies: evolution,galaxies: halos,galaxies: high-redshift,galaxies: statistics},
  language     = {eng},
  number       = {2},
  pages        = {19},
  title        = {The distribution of satellites around massive galaxies at 1 < z < 3 in sFourGE/CANDELS : dependence on star formation activity},
  url          = {http://dx.doi.org/10.1088/0004-637X/792/2/103},
  volume       = {792},
  year         = {2014},
}

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