|
|||||
|
|
Observations of the Sunyaev–Zel'dovich effect at high angular resolution towards the galaxy clusters A665, A2163 and CL0016+16 |
|
| Authors: | F-X Désert A Benoit S Gaertner J-P Bernard N Coron J Delabrouille P de Marcillac M Giard J-M Lamarre B Lefloch J-L Puget A Sirbi |
| Institution: | a Laboratoire d'Astrophysique de l'Observatoire de Grenoble, 414 rue de la Piscine, BP 53, F-38041 Grenoble Cedex 9, France b Institut d'Astrophysique Spatiale, Bât. 121, Université Paris XI, F-91405 Orsay Cedex, France c Centre de Recherche sur les Très Basses Températures, 25 Avenue des Martyrs BP166, F-38042 Grenoble Cedex 9, France d IRAM, avd Divina Pastora 7 Nucleo Central 18012, Granada, Spain e Centre d'Études Spatiales sur les Rayonnements, 9 Avenue du Colonel Roche, BP 4346, F-31029 Toulouse Cedex, France f Enrico Fermi Institute, University of Chicago, 5460 South Ellis Avenue, Chicago, IL 60637, USA |
| Abstract: | We report on the first observation of the Sunyaev–Zel'dovich (SZ) effect, a distortion of the Cosmic Microwave Background radiation (CMB) by hot electrons in clusters of galaxies, with the Diabolo experiment at the IRAM 30 m telescope. Diabolo is a dual-channel 0.1 K bolometer photometer dedicated to the observation of CMB anisotropies at 2.1 and 1.2 mm. A significant brightness decrement in the 2.1 mm channel is detected in the direction of three clusters (Abell 665, Abell 2163 and CL0016+16). With a 30 arcsec beam and 3 arcmin beamthrow, this is the highest angular resolution observation to date of the SZ effect. Interleaving integrations on targets and on nearby blank fields have been performed in order to check and correct for systematic effects. Gas masses can be directly inferred from these observations. |
| Keywords: | Instrumentation: photometers Cosmology: observations Galaxies: clusters: individual: Abell 665 Galaxies: clusters: individual: Abell 2163 Galaxies: clusters: individual: CL0016+16 Radio continuum: general |
| 本文献已被 ScienceDirect 等数据库收录！ | |