Mapping of the SZ effect in the cluster Cl 0016+16 with the Ryle Telescope

نویسندگان

  • Keith Grainge
  • William F. Grainger
  • Michael E. Jones
  • Rüdiger Kneissl
  • Guy G. Pooley
  • Richard Saunders
چکیده

We have mapped the high-redshift (z = 0.546) cluster Cl 0016+16 with the Ryle Telescope at 15 GHz. The Sunyaev–Zel’dovich decrement is clearly detected, and resolved. We combine our data with an X-ray image from ROSAT, and a gas temperature from ASCA to estimate the Hubble Constant H0 = 69+21 −16 km s −1 Mpc−1 for an ΩM = 1.0 cosmology or H0 = 84+25 −19 km s −1 Mpc−1 for ΩM = 0.3 and ΩΛ = 0.7.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Measuring the Hubble Constant from Ryle Telescope and X - ray observations , with application to Abell 1413

We describe our algorithm for measuring the Hubble constant from Ryle Telescope (RT) interferometric observations of the Sunyaev-Zel’dovich (SZ) effect from a galaxy cluster and observation of the cluster X-ray emission. We analyse the error budget in this method: as well as radio and X-ray random errors, we consider the effects of clumping and temperature differences in the cluster gas, of the...

متن کامل

A maximum - likelihood approach to removing radio sources from SZ observations , with application to Abell 611

We describe a maximum-likelihood technique for the removal of contaminating radio sources from interferometric observations of the Sunyaev-Zel’dovich (SZ) effect. This technique, based on a simultaneous fit for the radio sources and extended SZ emission, is also compared to techniques previously applied to Ryle Telescope observations and is found to be robust. The technique is then applied to n...

متن کامل

1 A Measurement of the Hubble Constant from the X - Ray Properties and the Sunyaev - Zel ’ dovich Effect of CL 0016 + 16

A value of the Hubble constant has been determined from a comparison of the X-ray properties and Sunyaev-Zel’dovich effect of the distant rich cluster of galaxies CL 0016+16. The cluster, as imaged by the ROSAT PSPC, is significantly elliptical and we present the techniques we have developed to include this in our analysis. Assuming a smooth, isothermal gas distribution, we obtain a value H0 = ...

متن کامل

The temperature and distribution of gas in CL 0016 + 16 measured with

We present results of a 37 ks observation of CL 0016+16 with the XMM-Newton EPIC instrument. Within 1.5 arcmin of the cluster centre we measure a gas temperature of kT = 9.13 +0.24 −0.22 keV and an abundance of 0.22 +0.04 −0.03 times the solar value (1σ uncertainties). This significant improvement over previous measurements has allowed us to revise the estimate of the Hubble constant based on C...

متن کامل

Measurement of the Sunyaev-Zel’dovich Increment in massive galaxy clusters

We have detected the Sunyaev-Zel’dovich (SZ) increment at 850μm in two galaxy clusters (Cl 0016 + 16 and MS 1054.4 − 0321) using SCUBA (Sub-millimetre Common User Bolometer Array) on the James Clerk Maxwell Telescope. Fits to the isothermal β model yield a central Compton y parameter of (2.2 ± 0.7) × 10 and a central 850μm flux of ∆I0 = 2.2 ± 0.7mJy beam in Cl 0016. This can be combined with de...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2001