On the Cluster Sunyaev-Zeldovich Effect and Hubble Constant | Zendy

Renyue Cen | Zendy

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On the Cluster Sunyaev-Zeldovich Effect and Hubble Constant

Author(s) -

Renyue Cen

Publication year - 1998

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/311315

Subject(s) - hubble's law , cosmic microwave background , physics , astrophysics , constant (computer programming) , hubble volume , gravitational lens , galaxy , age of the universe , cosmology , redshift , dark energy , anisotropy , quantum mechanics , computer science , programming language

This study shows one important effect of preexistent cosmic microwavebackground temperature fluctuations on the determination of the Hubble constantthrough Sunyaev-Zel'dovich effect of clusters of galaxies, especially whencoupled with the gravitational lensing effect by the same clusters. The effectresults in a broad distribution of the apparent Hubble constant. Thecombination of this effect with other systematic effects such as theLoeb-Refregier Effect seems to provide an explanation for the observationallyderived values of the Hubble constant currently available based on theSunyaev-Zel'dovich effect, if the true value of the Hubble constant is 60-80km/s/Mpc. It thus becomes possible that the values of the Hubble constantmeasured by other techniques which generally give a value around 60-80 km/s/Mpcbe reconciled with the SZ effect determined values of the Hubble constant,where are systematically lower than others and have a broad distribution.Comment: ApJ Lett in pres

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