Search Publications
A Hi-GAL study of the high-mass star-forming region G29.96-0.02
Testi, L.; Elia, D.; Schisano, E. +9 more
Context. G29.96-0.02 is a high-mass star-forming cloud observed at 70, 160, 250, 350, and 500 µm as part of the Herschel survey of the Galactic plane (Hi-GAL) during the science demonstration phase.
Aims: We wish to conduct a far-infrared study of the sources associated with this star-forming region by estimating their physical properti…
Exploring the circumstellar environment of the young eruptive star V2492 Cygni
Pál, A.; Mészáros, Sz.; Ábrahám, P. +20 more
Context. V2492 Cyg is a young eruptive star that went into outburst in 2010. The near-infrared color changes observed since the outburst peak suggest that the source belongs to a newly defined sub-class of young eruptive stars, where time-dependent accretion and variable line-of-sight extinction play a combined role in the flux changes.
Aims:…
An extended Herschel drop-out source in the center of AS1063: a normal dusty galaxy at z = 6.1 or SZ substructures?
Smail, I.; Kneib, J. -P.; Lutz, D. +23 more
In the course of our 870 µm APEX/LABOCA follow-up of the Herschel Lensing Survey we have detected a source in AS1063 (RXC J2248.7-4431) that has no counterparts in any of the Herschel PACS/SPIRE bands, it is a Herschel "drop-out" with S870/S500 ≥ 0.5. The 870 µm emission is extended and centered on the brightest c…
H2O vapor excitation in dusty AGB envelopes. A PACS view of OH 127.8+0.0
Blommaert, J. A. D. L.; de Koter, A.; Decin, L. +6 more
Context. AGB stars lose a large percentage of their mass in a dust-driven wind. This creates a circumstellar envelope, which can be studied through thermal dust emission and molecular emission lines. In the case of high mass-loss rates, this study is complicated by the high optical depths and the intricate coupling between gas and dust radiative t…
Secondary eclipses in the CoRoT light curves. A homogeneous search based on Bayesian model selection
Deeg, H. J.; Parviainen, H.; Belmonte, J. A.
Aims: We aim to identify and characterize secondary eclipses in the original light curves of all published CoRoT planets using uniform detection and evaluation critetia.
Methods: Our analysis is based on a Bayesian model selection between two competing models: one with and one without an eclipse signal. The search is carried out by mappi…
The Herschel Gould Belt Survey in Chamaeleon II. Properties of cold dust in disks around young stellar objects
Prusti, T.; Pilbratt, G. L.; André, Ph. +14 more
Context. We report on the Herschel Gould Belt survey (HGBS) of the Chamaeleon II (Cha II) star-forming region, focusing on the detection of Class I to III young stellar objects (YSOs).
Aims: We aim at characterizing the circumstellar material around these YSOs and at understanding which disk parameters are most likely constrained by the new H…
The Herschel/HIFI spectral survey of OMC-2 FIR 4 (CHESS). An overview of the 480 to 1902 GHz range
Ceccarelli, C.; Dominik, C.; Caux, E. +6 more
Context. Broadband spectral surveys of protostars offer a rich view of the physical, chemical and dynamical structure and evolution of star-forming regions. The Herschel Space Observatory opened up the terahertz regime to such surveys, giving access to the fundamental transitions of many hydrides and to the high-energy transitions of many other sp…
Classification and environmental properties of X-ray selected point-like sources in the XMM-LSS field
Chiappetti, L.; Salvato, M.; Pierre, M. +8 more
Context. The XMM-Large Scale Structure survey, covering an area of 11.1 sq. deg., contains more than 6000 X-ray point-like sources detected with the XMM-Newton to a flux of 3 × 10-15 erg s-1 cm-2 in the [0.5-2] keV band. The vast majority of these sources have optical (CFHTLS), infrared (SWIRE IRAC and MIPS), near-…
HST FUV C iv observations of the hot DG Tauri jet
Schmitt, J. H. M. M.; Güdel, M.; Eislöffel, J. +4 more
Protostellar jets are tightly connected to the accretion process and regulate the angular momentum balance of accreting star-disk systems. The DG Tau jet is one of the best-studied protostellar jets and contains plasma with temperatures ranging over three orders of magnitude within the innermost 50 AU of the jet. We present new Hubble Space Telesc…
Astrometric reduction of Cassini ISS images of the Saturnian satellites Mimas and Enceladus
Charnoz, S.; Cooper, N. J.; Lainey, V. +2 more
Aims: We provide astrometric observations of two of Saturn's main satellites, Mimas and Enceladus, using high resolution Cassini ISS Narrow Angle Camera images.
Methods: We developed a simplified astrometric reduction model for Cassini ISS images as an alternative to the one proposed by the Jet Propulsion Labratory (JPL). The particular …