SIMBAD references

2012ApJ...760...67R - Astrophys. J., 760, 67 (2012/November-3)

The YSZ-YX scaling relation as determined from Planck and Chandra.


Abstract (from CDS):

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 YSZ-YX scaling relation. We constrain the amplitude, slope, and scatter of the YSZ-YX scaling relation using SZ data from Planck and X-ray data from Chandra. We find a best-fit amplitude of ln (D 2AYSZ/CYX) = -0.202±0.024 at the pivot point CYX= 8 x 10–5 Mpc2. This corresponds to a YSZ/YX 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.

Abstract Copyright:

Journal keyword(s): galaxies: clusters: general

Simbad objects: 28

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