Search Publications
Planck 2015 results. XXVI. The Second Planck Catalogue of Compact Sources
Böhringer, H.; Kneissl, R.; Miville-Deschênes, M. -A. +240 more
The Second Planck Catalogue of Compact Sources is a list of discrete objects detected in single-frequency maps from the full duration of the Planck mission and supersedes previous versions. It consists of compact sources, both Galactic and extragalactic, detected over the entire sky. Compact sources detected in the lower frequency channels are ass…
Planck 2015 results. XXV. Diffuse low-frequency Galactic foregrounds
Kneissl, R.; Miville-Deschênes, M. -A.; Boulanger, F. +237 more
We discuss the Galactic foreground emission between 20 and 100 GHz based on observations by Planck and WMAP. The total intensity in this part of the spectrum is dominated by free-free and spinning dust emission, whereas the polarized intensity is dominated by synchrotron emission. The Commander component-separation tool has been used to separate t…
The habitability of Proxima Centauri b. I. Irradiation, rotation and volatile inventory from formation to the present
Guinan, Edward F.; Engle, Scott G.; Reiners, Ansgar +9 more
Proxima b is a planet with a minimum mass of 1.3M⊕ orbiting within the habitable zone (HZ) of Proxima Centauri, a very low-mass, active star and the Sun's closest neighbor. Here we investigate a number of factors related to the potential habitability of Proxima b and its ability to maintain liquid water on its surface. We set the stage …
An extreme [O III] emitter at z = 3.2: a low metallicity Lyman continuum source
Giavalisco, M.; Castellano, M.; Pentericci, L. +16 more
Aims: Cosmic reionization is an important process occurring in the early epochs of the Universe. However, because of observational limitations due to the opacity of the intergalactic medium to Lyman continuum photons, the nature of ionizing sources is still not well constrained. While high-redshift star-forming galaxies are thought to be the …
A publicly available simulation of an enhanced network region of the Sun
De Pontieu, Bart; Carlsson, Mats; Hansteen, Viggo H. +2 more
Context. The solar chromosphere is the interface between the solar surface and the solar corona. Modelling of this region is difficult because it represents the transition from optically thick to thin radiation escape, from gas-pressure domination to magnetic-pressure domination, from a neutral to an ionised state, from MHD to plasma physics, and …
Planck 2015 results. XXVIII. The Planck Catalogue of Galactic cold clumps
Miville-Deschênes, M. -A.; Boulanger, F.; Bernard, J. -P. +220 more
We present the Planck Catalogue of Galactic Cold Clumps (PGCC), an all-sky catalogue of Galactic cold clump candidates detected by Planck. This catalogue is the full version of the Early Cold Core (ECC) catalogue, which was made available in 2011 with the Early Release Compact Source Catalogue (ERCSC) and which contained 915 high signal-to-noise s…
Planck 2015 results. XXI. The integrated Sachs-Wolfe effect
Kneissl, R.; Miville-Deschênes, M. -A.; Bernard, J. -P. +229 more
This paper presents a study of the integrated Sachs-Wolfe (ISW) effect from the Planck 2015 temperature and polarization data release. This secondary cosmic microwave background (CMB) anisotropy caused by the large-scale time-evolving gravitational potential is probed from different perspectives. The CMB is cross-correlated with different large-sc…
Planck intermediate results. XXXII. The relative orientation between the magnetic field and structures traced by interstellar dust
Kneissl, R.; Miville-Deschênes, M. -A.; Boulanger, F. +201 more
The role of the magnetic field in the formation of the filamentary structures observed in the interstellar medium (ISM) is a debated topic owing to the paucity of relevant observations needed to test existing models. The Planck all-sky maps of linearly polarized emission from dust at 353 GHz provide the required combination of imaging and statisti…
The primordial nucleus of comet 67P/Churyumov-Gerasimenko
Jorda, L.; Lamy, P. L.; Lara, L. M. +45 more
Context. We investigate the formation and evolution of comet nuclei and other trans-Neptunian objects (TNOs) in the solar nebula and primordial disk prior to the giant planet orbit instability foreseen by the Nice model.
Aims: Our goal is to determine whether most observed comet nuclei are primordial rubble-pile survivors that formed in the s…
PTF12os and iPTF13bvn. Two stripped-envelope supernovae from low-mass progenitors in NGC 5806
Pian, E.; Sollerman, J.; Gal-Yam, A. +19 more
Context. We investigate two stripped-envelope supernovae (SNe) discovered in the nearby galaxy NGC 5806 by the (intermediate) Palomar Transient Factory [(I)PTF]. These SNe, designated PTF12os/SN 2012P and iPTF13bvn, exploded within ~520 days of one another at a similar distance from the host-galaxy center. We classify PTF12os as a Type IIb SN base…