Search Publications
Planck intermediate results. XLIII. Spectral energy distribution of dust in clusters of galaxies
Kneissl, R.; Miville-Deschênes, M. -A.; Planck Collaboration +179 more
Although infrared (IR) overall dust emission from clusters of galaxies has been statistically detected using data from the Infrared Astronomical Satellite (IRAS), it has not been possible to sample the spectral energy distribution (SED) of this emission over its peak, and thus to break the degeneracy between dust temperature and mass. By complemen…
The SOPHIE search for northern extrasolar planets. IX. Populating the brown dwarf desert
Bouchy, F.; Deleuil, M.; Moutou, C. +20 more
Radial velocity planet search surveys of nearby solar-type stars have shown a strong scarcity of brown dwarf companions within ~5 AU. There is presently no comprehensive explanation for this lack of brown dwarf companions; therefore, increasing the sample of such objects is crucial to understand their formation and evolution. Based on precise radi…
Discovery of a fast, broad, transient outflow in NGC 985
Kaastra, J. S.; Kriss, G. A.; Ebrero, J. +1 more
Aims: We observed the Seyfert 1 galaxy NGC 985 on several occasions to search for variability in its UV and X-ray absorption features to establish their location and physical properties.
Methods: We used XMM-Newton to obtain X-ray spectra using the EPIC-pn camera, and the Cosmic Origins Spectrograph (COS) on the Hubble Space Telescope (H…
Structure and stability in TMC-1: Analysis of NH3 molecular line and Herschel continuum data
Kirk, J.; Ward-Thompson, D.; Kraus, A. +5 more
Aims: We examined the velocity, density, and temperature structure of Taurus molecular cloud-1 (TMC-1), a filamentary cloud in a nearby quiescent star forming area, to understand its morphology and evolution.
Methods: We observed high signal-to-noise (S/N), high velocity resolution NH3(1,1), and (2, 2) emission on an extended …
The SHARDDS survey: First resolved image of the HD 114082 debris disk in the Lower Centaurus Crux with SPHERE
Pueyo, Laurent; Ertel, Steve; Boccaletti, Anthony +17 more
We present the first resolved image of the debris disk around the 16 ± 8 Myr old star, HD 114082. The observation was made in the H-band using the SPHERE instrument. The star is at a distance of 92 ± 6 pc in the Lower Centaurus Crux association. Using a Markov chain Monte Carlo analysis, we determined that the debris is likely in the form of a dus…
The dust environment of comet 67P/Churyumov-Gerasimenko from Rosetta OSIRIS and VLT observations in the 4.5 to 2.9 AU heliocentric distance range inbound
Jorda, L.; Lamy, P. L.; Lara, L. M. +51 more
Context. The ESA Rosetta spacecraft, currently orbiting around comet 67P/Churyumov-Gerasimenko, has already provided in situ measurements of the dust grain properties from several instruments,particularly OSIRIS and GIADA. We propose adding value to those measurements by combining them with ground-based observations of the dust tail to monitor the…
On the red giant branch mass loss in 47 Tucanae: Constraints from the horizontal branch morphology
Salaris, Maurizio; Cassisi, Santi; Pietrinferni, Adriano
We obtain stringent constraints on the actual efficiency of mass loss for red giant branch stars in the Galactic globular cluster 47 Tuc, by comparing synthetic modelling based on stellar evolution tracks with the observed distribution of stars along the horizontal branch in the colour-magnitude-diagram. We confirm that the observed, wedge-shaped …
Four and one more: The formation history and total mass of globular clusters in the Fornax dSph
Fraser, M.; de Boer, T. J. L.
We have determined the detailed star formation history and total mass of the globular clusters in the Fornax dwarf spheroidal using archival HST WFPC2 data. Colour-magnitude diagrams were constructed in the F555W and F814W bands and corrected for the effect of Fornax field star contamination, after which we used the routine Talos to derive the qua…
Variegation of comet 67P/Churyumov-Gerasimenko in regions showing activity
Jorda, L.; Lamy, P. L.; Lara, L. M. +49 more
Aims.We carried out an investigation of the surface variegation of comet 67P/Churyumov-Gerasimenko, the detection of regions showing activity, the determination of active and inactive surface regions of the comet with spectral methods, and the detection of fallback material.
Methods: We analyzed multispectral data generated with Optical, Spec…
Gamma-ray emission from SN2014J near maximum optical light
Sunyaev, R.; Churazov, E.; Hernanz, M. +17 more
Context. The optical light curve of Type Ia supernovae (SNIa) is powered by thermalized gamma-rays produced by the decay of 56Ni and 56Co, the main radioactive isotopes synthesized by the thermonuclear explosion of a C/O white dwarf.
Aims: Gamma-rays escaping the ejecta can be used as a diagnostic tool for studying the c…