Search Publications
Planck intermediate results. V. Pressure profiles of galaxy clusters from the Sunyaev-Zeldovich effect
Böhringer, H.; Kneissl, R.; Dahle, H. +215 more
Taking advantage of the all-sky coverage and broadfrequency range of the Planck satellite, we study the Sunyaev-Zeldovich (SZ) and pressure profiles of 62 nearby massive clusters detected at high significance in the 14-month nominal survey. Careful reconstruction of the SZ signal indicates that most clusters are individually detected at least out …
Planck intermediate results. XI. The gas content of dark matter halos: the Sunyaev-Zeldovich-stellar mass relation for locally brightest galaxies
Böhringer, H.; Kneissl, R.; Dahle, H. +201 more
We present the scaling relation between Sunyaev-Zeldovich (SZ) signal and stellar mass for almost 260,000 locally brightest galaxies (LBGs) selected from the Sloan Digital Sky Survey (SDSS). These are predominantly the central galaxies of their dark matter halos. We calibrate the stellar-to-halo mass conversion using realistic mock catalogues base…
Planck intermediate results. IX. Detection of the Galactic haze with Planck
Bernard, J. -P.; Planck Collaboration; Ade, P. A. R. +186 more
Using precise full-sky observations from Planck, and applying several methods of component separation, we identify and characterise the emission from the Galactic "haze" at microwave wavelengths. The haze is a distinct component of diffuse Galactic emission, roughly centered on the Galactic centre, and extends to | b | ~ 35-50° in Galactic latitud…
Planck intermediate results. X. Physics of the hot gas in the Coma cluster
Böhringer, H.; Kneissl, R.; Dahle, H. +207 more
We present an analysis of Planck satellite data on the Coma cluster observed via the Sunyaev-Zeldovich effect. Thanks to its great sensitivity, Planck is able, for the first time, to detect SZ emission up to r ≈ 3 × R500. We test previously proposed spherically symmetric models for the pressure distribution in clusters against the azimu…
Planck intermediate results. VIII. Filaments between interacting clusters
Böhringer, H.; Kneissl, R.; Bernard, J. -P. +205 more
Context. About half of the baryons of the Universe are expected to be in the form of filaments of hot and low-density intergalactic medium. Most of these baryons remain undetected even by the most advanced X-ray observatories, which are limited in sensitivity to the diffuse low-density medium.
Aims: The Planck satellite has provided hundreds …
The redshift evolution of the distribution of star formation among dark matter halos as seen in the infrared
Daddi, Emanuele; Béthermin, Matthieu; Lagache, Guilaine +5 more
Recent studies have revealed a strong correlation between the star formation rate (SFR) and stellar mass of the majority of star-forming galaxies, the so-called star-forming main sequence. An empirical modeling approach (the 2-SFM framework) that distinguishes between the main sequence and rarer starburst galaxies is capable of reproducing most st…
Planck intermediate results. III. The relation between galaxy cluster mass and Sunyaev-Zeldovich signal
Böhringer, H.; Kneissl, R.; Dahle, H. +183 more
We examine the relation between the galaxy cluster mass M and Sunyaev-Zeldovich (SZ) effect signal DA2 Y500 for a sample of 19 objects for which weak lensing (WL) mass measurements obtained from Subaru Telescope data are available in the literature. Hydrostatic X-ray masses are derived from XMM-Newton archive data,…
The extended ROSAT-ESO flux limited X-ray galaxy cluster survey (REFLEX II) II. Construction and properties of the survey
Böhringer, H.; Nowak, N.; Chon, G. +3 more
Context. Galaxy clusters provide unique laboratories to study astrophysical processes on large scales and are important probes for cosmology. X-ray observations are currently the best means of detecting and characterizing galaxy clusters. Therefore X-ray surveys for galaxy clusters are one of the best ways to obtain a statistical census of the gal…
Planck intermediate results. VII. Statistical properties of infrared and radio extragalactic sources from the Planck Early Release Compact Source Catalogue at frequencies between 100 and 857 GHz
Kneissl, R.; Bernard, J. -P.; Planck Collaboration +188 more
We make use of the Planck all-sky survey to derive number counts and spectral indices of extragalactic sources - infrared and radio sources - from the Planck Early Release Compact Source Catalogue (ERCSC) at 100 to 857 GHz (3 mm to 350 µm). Three zones (deep, medium and shallow) of approximately homogeneous coverage are used to permit a clea…
Full-sky CMB lensing reconstruction in presence of sky-cuts
Benabed, K.; Benoit-Lévy, A.; Cardoso, J. -F. +3 more
We consider the reconstruction of the CMB lensing potential and its power spectrum on the full sphere in presence of sky-cuts due to point sources and Galactic contamination. These two effects are treated separately. Small regions contaminated by point sources are filled in using constrained Gaussian realizations. The Galactic plane is simply remo…