Search Publications
A new nearby pulsar wind nebula overlapping the RX J0852.0-4622 supernova remnant
Ballet, J.; Terrier, R.; Acero, F. +2 more
Context. Energetic pulsars can be embedded in a nebula of relativistic leptons that is powered by the dissipation of the rotational energy of the pulsar. The object PSR J0855-4644 is an energetic and fast-spinning pulsar (Ė = 1.1 × 1036 erg s-1, P = 65 ms) discovered near the southeast rim of the supernova remnant (SNR) RX J0…
CoRoT 101186644: A transiting low-mass dense M-dwarf on an eccentric 20.7-day period orbit around a late F-star. Discovered in the CoRoT lightcurves
Mazeh, T.; Alonso, R.; Bouchy, F. +10 more
We present the study of the CoRoT transiting planet candidate 101186644, also named LRc01_E1_4780. Analysis of the CoRoT lightcurve and the HARPS spectroscopic follow-up observations of this faint (mV = 16) candidate revealed an eclipsing binary composed of a late F-type primary (Teff = 6090 ± 200 K) and a low-mass, dense lat…
The role of low-mass star clusters in massive star formation. The Orion case
Martín-Pintado, J.; Jiménez-Serra, I.; Rivilla, V. M. +1 more
Context. Different theories have been proposed to explain the formation of massive stars: two are based on accretion processes (monolithic core accretion and competitive accretion), and another on coalescence of low- and intermediate-mass stars. To distinguish between these theories, it is crucial to establish the distribution, the extinction, and…
Cross-calibration of Suzaku/XIS and XMM-Newton/EPIC using galaxy clusters
Miller, E. D.; Nevalainen, J.; Kettula, K.
Aims: We extend a previous cross-calibration study conducted by the International Astronomical Consortium for High Energy Calibration (IACHEC) on XMM-Newton/EPIC, Chandra/ACIS and BeppoSAX/MECS X-ray instruments with galaxy clusters to Suzaku/XIS instruments. Our aim is to study the accuracy of the energy-dependent effective area calibration …
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…