Which haloes host Herschel-ATLAS galaxies in the local Universe?

被引:14
|
作者
Guo, Qi [19 ]
Cole, Shaun [19 ]
Lacey, Cedric G. [19 ]
Baugh, Carlton M. [19 ]
Frenk, Carlos S. [19 ]
Norberg, Peder [1 ]
Auld, R. [2 ]
Baldry, I. K. [3 ]
Bamford, S. P. [4 ]
Bourne, N. [4 ]
Buttiglione, E. S. [5 ]
Cava, A. [6 ,20 ]
Cooray, A. [7 ]
Croom, S. [8 ]
Dariush, A. [2 ]
De Zotti, G. [5 ,9 ]
Driver, S. [10 ]
Dunne, L. [4 ]
Dye, S. [2 ]
Eales, S. [2 ]
Fritz, J. [11 ]
Hopkins, A. [12 ]
Hopwood, R. [13 ]
Ibar, E. [14 ]
Ivison, R. J. [14 ]
Jarvis, M. [15 ]
Jones, D. H. [12 ]
Kelvin, L. [10 ]
Liske, J. [16 ]
Loveday, J. [18 ]
Maddox, S. J. [4 ]
Parkinson, H. [1 ]
Pascale, E. [2 ]
Peacock, J. A. [1 ]
Pohlen, M. [2 ]
Prescott, M. [3 ]
Rigby, E. E. [4 ]
Robotham, A. [10 ]
Rodighiero, G. [5 ]
Sharp, R. [12 ]
Smith, D. J. B. [2 ]
Temi, P. [17 ]
van Kampen, E. [16 ]
机构
[1] Univ Edinburgh, Inst Astron, SUPA, Royal Observ, Edinburgh EH9 3HJ, Midlothian, Scotland
[2] Cardiff Univ, Sch Phys & Astron, Cardiff CF24 3AA, Wales
[3] Liverpool John Moores Univ, Astrophys Res Inst, Birkenhead CH41 1LD, Merseyside, England
[4] Univ Nottingham, Sch Phys & Astron, Nottingham NG7 2RD, England
[5] Osserv Astron Padova, INAF, I-35122 Padua, Italy
[6] Inst Astrofis Canarias IAC, Tenerife, Spain
[7] Univ Calif Irvine, Dept Phys & Astron, Irvine, CA 92697 USA
[8] Univ Sydney, Sydney Inst Astron, Sch Phys, Sydney, NSW 2006, Australia
[9] SISSA, I-34136 Trieste, Italy
[10] Univ St Andrews, Sch Phys & Astron, St Andrews KY16 9SS, Fife, Scotland
[11] Univ Ghent, Sterrenkundig Observatorium, B-9000 Ghent, Belgium
[12] Australian Astron Observ, Epping, NSW 1710, Australia
[13] Open Univ, Dept Phys & Astron, Milton Keynes MK7 6AA, Bucks, England
[14] Royal Observ, UK Astron Technol Ctr, Edinburgh EH9 3HJ, Midlothian, Scotland
[15] Univ Hertfordshire, Sci & Technol Res Inst, Ctr Astrophys, Hatfield AL10 9AB, Herts, England
[16] European So Observ, D-85748 Garching, Germany
[17] NASA, Astrophys Branch, Ames Res Ctr, Moffett Field, CA 94035 USA
[18] Univ Sussex, Ctr Astron, Brighton BN1 9QH, E Sussex, England
[19] Univ Durham, Dept Phys, Inst Computat Cosmol, Durham DH1 3LE, England
[20] Dept Astrofis La Laguna ULL, Tenerife, Spain
基金
英国科学技术设施理事会;
关键词
galaxies: haloes; dark matter; infrared: galaxies; STAR-FORMATION RATES; MASS ASSEMBLY GAMA; LUMINOSITY FUNCTION; NUMBER; SPIRE; BIAS;
D O I
10.1111/j.1365-2966.2010.18051.x
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We measure the projected cross-correlation between low-redshift (z < 0.5) far-infrared selected galaxies in the science demonstration phase (SDP) field of the Herschel-ATLAS (H-ATLAS) survey and optically selected galaxies from the Galaxy and Mass Assembly (GAMA) redshift survey. In order to obtain robust correlation functions, we restrict the analysis to a subset of 969 out of 6900 H-ATLAS galaxies, which have reliable optical counterparts with r < 19.4 mag and well-determined spectroscopic redshifts. The overlap region between the two surveys is 12.6 deg2; the matched sample has a median redshift of z approximate to 0.2. The cross-correlation of GAMA and H-ATLAS galaxies within this region can be fitted by a power law, with correlation length r(0) approximate to 4.63 +/- 0.51 Mpc. Comparing with the corresponding autocorrelation function of GAMA galaxies within the SDP field yields a relative bias (averaged over 2-8 Mpc) of H-ATLAS and GAMA galaxies of b(H)/b(G) approximate to 0.6. Combined with clustering measurements from previous optical studies, this indicates that most of the low-redshift H-ATLAS sources are hosted by haloes with masses comparable to that of the Milky Way. The correlation function appears to depend on the 250-mu m luminosity, L-250, with bright (median luminosity nu L-250 similar to 1.6 x 1010 L-circle dot) objects being somewhat more strongly clustered than faint (nu L-250 similar to 4.0 x 109 L-circle dot) objects. This implies that galaxies with higher dust-obscured star formation rates are hosted by more massive haloes.
引用
收藏
页码:2277 / 2285
页数:9
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