THE y SZ-YX scaling relation as determined from Planck and Chandra

Eduardo Rozo, Alexey Vikhlinin, Surhud More

Research output: Contribution to journalArticle

23 Scopus citations

Abstract

Sunyaev-Zeldovich (SZ) clusters surveys, such as Planck, the South Pole Telescope, and the Atacama Cosmology Telescope, will soon be publishing several hundred SZ-selected systems. The key ingredient required to transport the mass calibration from current X-ray-selected cluster samples to these SZ systems is the Y SZ-YX scaling relation. We constrain the amplitude, slope, and scatter of the Y SZ-YX scaling relation using SZ data from Planck and X-ray data from Chandra. We find a best-fit amplitude of ln (D 2 A Y SZ/CYX ) = -0.202 ± 0.024 at the pivot point CYX = 8 × 10-5 Mpc2. This corresponds to a Y SZ/Y X ratio of 0.82 ± 0.024, in good agreement with X-ray expectations after including the effects of gas clumping. The slope of the relation is α = 0.916 ± 0.032, consistent with unity at ≈ 2.3σ. We are unable to detect intrinsic scatter, and find no evidence that the scaling relation depends on cluster dynamical state.

Original languageEnglish (US)
Article number67
JournalAstrophysical Journal
Volume760
Issue number1
DOIs
StatePublished - Nov 20 2012
Externally publishedYes

Keywords

  • galaxies: clusters: general

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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