Search Publications
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…
Studying the properties of galaxy cluster morphology estimators
Böhringer, H.; Šuhada, R.; Ameglio, S. +1 more
X-ray observations of galaxy clusters reveal a large range of morphologies with various degrees of disturbance, showing that the assumptions of hydrostatic equilibrium and spherical shape, which are used to determine the cluster mass from X-ray data are not always satisfied. It is therefore important for the understanding of cluster properties as …
Gas-phase CO depletion and N2H+ abundances in starless cores
Henning, Th.; Krause, O.; Balog, Z. +10 more
Context. In the dense and cold interiors of starless molecular cloud cores, a number of chemical processes allow for the formation of complex molecules and the deposition of ice layers on dust grains. Dust density and temperature maps of starless cores derived from Herschel continuum observations constrain the physical structure of the cloud cores…
A detailed X-ray investigation of ζ Puppis. III. Spectral analysis of the whole RGS spectrum
Nazé, Y.; Rauw, G.; Hervé, A.
Context. ζ Pup is the X-ray brightest O-type star of the sky. This object was regularly observed with the RGS instrument onboard XMM-Newton for calibration purposes, which led to an unprecedented set of high-quality spectra.
Aims: We have previously reduced and extracted this data set and integrated it into the most detailed high-resolution X…
Towards a complete stellar mass function of the Hyades. I. Pan-STARRS1 optical observations of the low-mass stellar content
Price, P. A.; Henning, T.; Chen, W. P. +15 more
Aims: The Hyades cluster is an ideal target to study the dynamical evolution of a star cluster over the entire mass range due to its intermediate age and proximity to the Sun.
Methods: We wanted to extend the Hyades mass function towards lower masses down to 0.1 M⊙ and to use the full three-dimensional spatial information to c…
HERschel Observations of Edge-on Spirals (HEROES). I. Far-infrared morphology and dust mass determination
Blommaert, J. A. D. L.; Bianchi, S.; Fritz, J. +11 more
Context. Edge-on spiral galaxies with prominent dust lanes provide us with an excellent opportunity to study the distribution and properties of the dust within them. The HEROES project was set up to observe a sample of seven large edge-on galaxies across various wavelengths for this investigation.
Aims: Within this first paper, we present the…
Young stars in ɛ Chamaleontis and their disks: disk evolution in sparse associations
Henning, Th.; van Boekel, R.; Lawson, W. A. +3 more
Context. The nearby young stellar association ɛ Cha has an estimated age of 3-5 Myr, making it an ideal laboratory to study the disk dissipation process and provide empirical constraints on the timescale of planet formation.
Aims: We wish to complement existing optical and near-infrared data of the ɛ Cha association, which provide the stellar…
Planck intermediate results. IV. The XMM-Newton validation programme for new Planck galaxy clusters
Böhringer, H.; Kneissl, R.; Dahle, H. +191 more
We present the final results from the XMM-Newton validation follow-up of new Planck galaxy cluster candidates. We observed 15 new candidates, detected with signal-to-noise ratios between 4.0 and 6.1 in the 15.5-month nominal Planck survey. The candidates were selected using ancillary data flags derived from the ROSAT All Sky Survey (RASS) and Digi…
Gas and dust in the TW Hydrae association as seen by the Herschel Space Observatory
Pinte, C.; Duchêne, G.; Dent, W. R. F. +15 more
Context. Circumstellar discs are the places where planets form, therefore knowledge of their evolution is crucial for our understanding of planet formation. The Herschel Space Observatory is providing valuable data for studying disc systems, thanks to its sensitivity and wavelength coverage. This paper is one of several devoted to analysing and mo…
Recent star formation in the Lupus clouds as seen by Herschel
Hill, T.; White, G. J.; André, Ph. +26 more
We present a study of the star formation histories of the Lupus I, III, and IV clouds using the Herschel 70-500 µm maps obtained by the Herschel Gould Belt Survey Key Project. By combining the new Herschel data with the existing Spitzer catalog we obtained an unprecedented census of prestellar sources and young stellar objects in the Lupus c…