Calibration of the galaxy cluster M500-Yx relation with XMM-Newton

被引:163
作者
Arnaud, M.
Pointecouteau, E.
Pratt, G. W.
机构
[1] Univ Paris Diderot, Lab AIM, CNRS, DAPNIA Serv Astrophys CEA DSM,CEA Saclay, F-91191 Gif Sur Yvette, France
[2] CESR, F-31028 Toulouse 4, France
[3] Max Planck Inst Extraterr Phys, D-85748 Garching, Germany
关键词
cosmology : observations; cosmology : dark matter; galaxies : clusters : general; galaxies : intergalactic medium X; rays : galaxies : clusters; M-T RELATION; SCALING PROPERTIES; MASS PROFILE; SIMULATIONS; SAMPLE;
D O I
10.1051/0004-6361:20078541
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
The quantity Y-X, the product of the X-ray temperature T-X and gas mass M-g, has recently been proposed as a robust low- scatter mass indicator for galaxy clusters. Using precise measurements from XMM- Newton data of a sample of 10 relaxed nearby clusters, spanning a Y-X range of 10(13)-10(15) M-circle dot keV, we investigate the M500 - YX relation. The M-500-Y-X data exhibit a power law relation with slope a = 0.548 +/- 0.027, close to the self-similar value (3/5) and independent of the mass range considered. However, the normalisation is similar to 20% below the prediction from numerical simulations including cooling and galaxy feedback. We discuss two effects that could contribute to the normalisation offset: an underestimate of the true mass due to the hydrostatic equilibrium assumption used in X-ray mass estimates, and an underestimate of the hot gas mass fraction in the simulations. A comparison of the functional form and scatter of the relations between various observables and the mass suggest that Y-X may indeed be a better mass proxy than T-X or M-g500.
引用
收藏
页码:L37 / L40
页数:4
相关论文
共 19 条
[1]   The structural and scaling properties of nearby galaxy clusters -: II.: The M-T relation [J].
Arnaud, M ;
Pointecouteau, E ;
Pratt, GW .
ASTRONOMY & ASTROPHYSICS, 2005, 441 (03) :893-903
[2]   Simulations of structure formation in the universe [J].
Bertschinger, E .
ANNUAL REVIEW OF ASTRONOMY AND ASTROPHYSICS, 1998, 36 :599-654
[3]   The representative XMM-Newton cluster structure survey (REXCESS) of an X-ray luminosity selected galaxy cluster sample [J].
Boehringer, H. ;
Schuecker, P. ;
Pratt, G. W. ;
Arnaud, M. ;
Ponman, T. J. ;
Croston, J. H. ;
Borgani, S. ;
Bower, R. G. ;
Briel, U. G. ;
Collins, C. A. ;
Donahue, M. ;
Forman, W. R. ;
Finoguenov, A. ;
Geller, M. J. ;
Guzzo, L. ;
Henry, J. P. ;
Kneissl, R. ;
Mohr, J. J. ;
Matsushita, K. ;
Mullis, C. R. ;
Ohashi, T. ;
Pedersen, K. ;
Pierini, D. ;
Quintana, H. ;
Raychaudhury, S. ;
Reiprich, T. H. ;
Romer, A. K. ;
Rosati, P. ;
Sabirli, K. ;
Temple, R. F. ;
Viana, P. T. P. ;
Vikhlinin, A. ;
Voit, G. M. ;
Zhang, Y.-Y. .
ASTRONOMY & ASTROPHYSICS, 2007, 469 (01) :363-377
[4]   An improved deprojection and PSF-deconvolution technique for galaxy-cluster X-ray surface-brightness profiles [J].
Croston, J. H. ;
Arnaud, M. ;
Pointecouteau, E. ;
Pratt, G. W. .
ASTRONOMY & ASTROPHYSICS, 2006, 459 (03) :1007-1019
[5]   Hydrodynamical simulations of the Sunyaev-Zel'dovich effect: cluster scaling relations and X-ray properties [J].
da Silva, AC ;
Kay, ST ;
Liddle, AR ;
Thomas, PA .
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2004, 348 (04) :1401-1408
[6]   A new robust low-scatter X-ray mass indicator for clusters of galaxies [J].
Kravtsov, Andrey V. ;
Vikhlinin, Alexey ;
Nagai, Daisuke .
ASTROPHYSICAL JOURNAL, 2006, 650 (01) :128-136
[7]  
MAUGHAN BJ, 2007, IN PRESS APJ
[8]  
MOTI PM, 2005, APJ, V623, pL63
[9]  
NAGAI D, 2007, UNPUB APJ
[10]   Testing X-ray measurements of galaxy clusters with cosmological simulations [J].
Nagai, Daisuke ;
Vikhlinin, Alexey ;
Kravtsov, Andrey V. .
ASTROPHYSICAL JOURNAL, 2007, 655 (01) :98-108