6533b837fe1ef96bd12a2a40
RESEARCH PRODUCT
Extraction of cluster parameters with future Sunyaev-Zel'dovich observations
Sergio PastorNabila AghanimDmitry V. SemikozDmitry V. SemikozSteen H. Hansensubject
PhysicsSystematic error010308 nuclear & particles physicsAstrophysics (astro-ph)FOS: Physical sciencesFísicaAstronomy and AstrophysicsAstrophysicsAstrophysics::Cosmology and Extragalactic AstrophysicsAstrophysics01 natural sciencesComputational physics[PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO]High Energy Physics - PhenomenologyHigh Energy Physics - Phenomenology (hep-ph)[PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph]0103 physical sciencesPeculiar velocityCluster (physics)Electron temperaturePoint (geometry)Degeneracy (mathematics)010303 astronomy & astrophysicsGalaxy clusterdescription
The Sunyaev-Zel'dovich (SZ) effect of galaxy clusters is characterized by three parameters: Compton parameter, electron temperature and cluster peculiar velocity. In the present study we consider the problem of extracting these parameters using multi-frequency SZ observations only. We show that there exists a parameter degeneracy which can be broken with an appropriate choice of frequencies. As a result we discuss the optimal choice of observing frequencies from a theoretical point of view. Finally, we analyze the systematic errors (of the order micro K) on the SZ measurement introduced by finite bandwidths, and suggest a possible method of reducing these errors.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2003-01-01 |