Search Publications
Near-infrared transmission spectrum of the warm-Uranus GJ 3470b with the Wide Field Camera-3 on the Hubble Space Telescope
Ségransan, D.; Bonfils, X.; Ehrenreich, D. +7 more
The atmospheric composition of super-Earths and Neptunes is the object of intense observational and theoretical investigations. Transmission spectra recently obtained for such exoplanets are featureless in the near infrared. This flat signature is attributed to the presence of optically-thick clouds or translucent hazes. The planet
The W43-MM1 mini-starburst ridge, a test for star formation efficiency models
Hill, T.; Csengeri, T.; Bontemps, S. +13 more
Context. Star formation efficiency (SFE) theories are currently based on statistical distributions of turbulent cloud structures and a simple model of star formation from cores. They remain poorly tested, especially at the highest densities.
Aims: We investigate the effects of gas density on the SFE through measurements of the core formation …
Planck 2013 results. II. Low Frequency Instrument data processing
Bernard, J. -P.; Planck Collaboration; Aghanim, N. +229 more
We describe the data processing pipeline of the Planck Low Frequency Instrument (LFI) data processing centre (DPC) to create and characterize full-sky maps based on the first 15.5 months of operations at 30, 44, and 70 GHz. In particular, we discuss the various steps involved in reducing the data, from telemetry packets through to the production o…
The stripping of a galaxy group diving into the massive cluster A2142
Rossetti, M.; Paltani, S.; Molendi, S. +7 more
Structure formation in the current Universe operates through the accretion of group-scale systems onto massive clusters. The detection and study of such accreting systems is crucial to understand the build-up of the most massive virialized structures we see today. We report the discovery with XMM-Newton of an irregular X-ray substructure in the ou…
Planck intermediate results. XV. A study of anomalous microwave emission in Galactic clouds
Kneissl, R.; Miville-Deschênes, M. -A.; Boulanger, F. +183 more
Anomalous microwave emission (AME) is believed to be due to electric dipole radiation from small spinning dust grains. The aim of this paper is a statistical study of the basic properties of AME regions and the environment in which they emit. We used WMAP and Planck maps, combined with ancillary radio and IR data, to construct a sample of 98 candi…
Intracluster light properties in the CLASH-VLT cluster MACS J1206.2-0847
Zheng, W.; Molino, A.; Moustakas, J. +46 more
Aims: We aim constrain the assembly history of clusters by studying the intracluster light (ICL) properties, estimating its contribution to the fraction of baryons in stars, f∗, and understanding possible systematics or bias using different ICL detection techniques.
Methods: We developed an automated method, GALtoICL, based on…
Planck 2013 results. X. HFI energetic particle effects: characterization, removal, and simulation
Kneissl, R.; Miville-Deschênes, M. -A.; Bernard, J. -P. +213 more
We describe the detection, interpretation, and removal of the signal resulting from interactions of high energy particles with the Planck High Frequency Instrument (HFI). There are two types of interactions: heating of the 0.1 K bolometer plate; and glitches in each detector time stream. The transientresponses to detector glitch shapes are not sim…
New light on gamma-ray burst host galaxies with Herschel
Berta, S.; Le Floc'h, E.; Covino, S. +17 more
Until recently, dust emission has been detected in very few host galaxies of gamma-ray bursts (GRBHs). With Herschel, we have now observed 17 GRBHs up to redshift z ~ 3 and detected 7 of them at infrared (IR) wavelengths. This relatively high detection rate (41%) may be due to the composition of our sample which at a median redshift of 1.1 is domi…
The Mrk 231 molecular outflow as seen in OH
Lutz, D.; Poglitsch, A.; Sturm, E. +12 more
We report on the Herschel/PACS observations of OH in Mrk 231, with detections in nine doublets observed within the PACS range, and present radiative-transfer models for the outflowing OH. Clear signatures of outflowing gas are found in up to six OH doublets with different excitation requirements. At least two outflowing components are identified, …
Ionization compression impact on dense gas distribution and star formation. Probability density functions around H II regions as seen by Herschel
Hill, T.; White, G. J.; André, Ph. +22 more
Aims: Ionization feedback should impact the probability distribution function (PDF) of the column density of cold dust around the ionized gas. We aim to quantify this effect and discuss its potential link to the core and initial mass function (CMF/IMF).
Methods: We used Herschel column density maps of several regions observed within the …