Search Publications
Planck 2013 results. XXV. Searches for cosmic strings and other topological defects
Miville-Deschênes, M. -A.; Bernard, J. -P.; Planck Collaboration +225 more
Planck data have been used to provide stringent new constraints on cosmic strings and other defects. We describe forecasts of the CMB power spectrum induced by cosmic strings, calculating these from network models and simulations using line-of-sight Boltzmann solvers. We have studied Nambu-Goto cosmic strings, as well as field theory strings for w…
Planck 2013 results. XII. Diffuse component separation
Kneissl, R.; Miville-Deschênes, M. -A.; Boulanger, F. +258 more
Planck has produced detailed all-sky observations over nine frequency bands between 30 and 857 GHz. These observations allow robust reconstruction of the primordial cosmic microwave background (CMB) temperature fluctuations over nearly the full sky, as well as new constraints on Galactic foregrounds, including thermal dust and line emission from m…
Gaia FGK benchmark stars: Metallicity
Montes, D.; de Laverny, P.; Cantat-Gaudin, T. +22 more
Context. To calibrate automatic pipelines that determine atmospheric parameters of stars, one needs a sample of stars, or "benchmark stars", with well-defined parameters to be used as a reference.
Aims: We provide detailed documentation of the iron abundance determination of the 34 FGK-type benchmark stars that are selected to be the pillars …
Planck 2013 results. XXX. Cosmic infrared background measurements and implications for star formation
Kneissl, R.; Miville-Deschênes, M. -A.; Boulanger, F. +239 more
We present new measurements of cosmic infrared background (CIB) anisotropies using Planck. Combining HFI data with IRAS, the angular auto- and cross-frequency power spectrum is measured from 143 to 3000 GHz, and the auto-bispectrum from 217 to 545 GHz. The total areas used to compute the CIB power spectrum and bispectrum are about 2240 and 4400 de…
The evolution of the dust and gas content in galaxies
Berta, S.; Magnelli, B.; Nordon, R. +36 more
We use deep Herschel observations taken with both PACS and SPIRE imaging cameras to estimate the dust mass of a sample of galaxies extracted from the GOODS-S, GOODS-N and the COSMOS fields. We divide the redshift-stellar mass (Mstar)-star formation rate (SFR) parameter space into small bins and investigate average properties over this g…
Planck 2013 results. XXVII. Doppler boosting of the CMB: Eppur si muove
Bernard, J. -P.; Planck Collaboration; Aghanim, N. +181 more
Our velocity relative to the rest frame of the cosmic microwave background (CMB) generates a dipole temperature anisotropy on the sky which has been well measured for more than 30 years, and has an accepted amplitude of v/c = 1.23 × 10-3, or v = 369. In addition to this signal generated by Doppler boosting of the CMB monopole, our motio…
The Sloan Digital Sky Survey quasar catalog: tenth data release
Finley, Hayley; Pâris, Isabelle; Petitjean, Patrick +47 more
We present the Data Release 10 Quasar (DR10Q) catalog from the Baryon Oscillation Spectroscopic Survey (BOSS) of the Sloan Digital Sky Survey III. The catalog includes all BOSS objects that were targeted as quasar candidates during the first 2.5 years of the survey and that are confirmed as quasars via visual inspection of the spectra, have lumino…
Metallicity evolution, metallicity gradients, and gas fractions at z ~ 3.4
Cimatti, A.; Maiolino, R.; Pentericci, L. +9 more
We used near-infrared integral field spectroscopic observations from the AMAZE and LSD ESO programs to constrain the metallicity in a sample of 40 star-forming galaxies at 3 < z < 5 (most of which are at z ~ 3.4). We measured metallicities by exploiting strong emission-line diagnostics. We found that a significant fraction of star-forming ga…
The evolution of the dust temperatures of galaxies in the SFR-M∗ plane up to z ∼ 2
Berta, S.; Magnelli, B.; Nordon, R. +38 more
We study the evolution of the dust temperature of galaxies in the SFR- M∗ plane up to z ~ 2 using far-infrared and submillimetre observations from the Herschel Space Observatory taken as part of the PACS Evolutionary Probe (PEP) and Herschel Multi-tiered Extragalactic Survey (HerMES) guaranteed time key programmes. Starting from a sampl…
The Wolf-Rayet stars in the Large Magellanic Cloud. A comprehensive analysis of the WN class
Foellmi, C.; Hamann, W. -R.; Oskinova, L. M. +6 more
Context. Massive stars, although being important building blocks of galaxies, are still not fully understood. This especially holds true for Wolf-Rayet (WR) stars with their strong mass loss, whose spectral analysis requires adequate model atmospheres.
Aims: Following our comprehensive studies of the WR stars in the Milky Way, we now present …