A measurement of H0 from Ryle Telescope, ASCA and ROSAT observations of Abell 773

被引：25

作者：

Saunders, R

Kneissl, R

Grainge, K

Grainger, WF

Jones, ME

Maggi, A

Das, R

Edge, AC

Lasenby, AN

Pooley, GG

Miyoshi, SJ

Tsuruta, T

Yamashita, K

Tawara, Y

Furuzawa, A

Harada, A

Hatsukade, I

机构：

[1] Univ Cambridge, Cavendish Lab, Astrophys Grp, Cambridge CB3 0HE, England

[2] Univ Cambridge St Johns Coll, Cambridge CB2 1TP, England

[3] Univ Durham, Dept Phys, Durham DH1 3LE, England

[4] Kyoto Sangyo Univ, Dept Phys, Kito Ku, Kyoto 603, Japan

[5] Nagoya Univ, Fac Sci, Dept Astrophys, Chikusa Ku, Nagoya, Aichi 46401, Japan

[6] Miyazaki Univ, Fac Engn, Miyazaki 88921, Japan

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2003年 / 341卷 / 03期

关键词：

galaxies : clusters : individual : A773; cosmic microwave background; cosmology : observations; distance scale; X-rays : general;

D O I：

10.1046/j.1365-8711.2003.06467.x

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present new Ryle Telescope (RT) observations of the Sunyaev-Zel'dovich (SZ) decrement from the cluster Abell 773. The field contains a number of faint radio sources that required careful subtraction. We use ASCA observations to measure the gas temperature and a ROSAT HRI image to model the gas density distribution. Normalizing the gas distribution to fit the RT visibilities returns a value of H-0 of 77(-15)(+19) km s(-1) Mpc(-1) (1sigma errors) for an Einstein-de Sitter universe, or 85(-17)(+20) km s(-1) Mpc(-1) for a flat model with Omega(Lambda)=0.7. The errors quoted include estimates of the effects of the principal errors: noise in the SZ measurement, gas temperature uncertainty and line-of-sight depth uncertainty.

引用

页码：937 / 940

页数：4

共 18 条

[1] The impact of cooling flows on the TX-LBol relation for the most luminous clusters [J].