Search Publications
The circumstellar environment of the YSO TMR-1 and a revisit to the candidate very low-mass object TMR-1C
Smith, M. D.; Sterzik, M. F.; Cuby, J. -G. +1 more
Context. TMR-1 (IRAS 04361+2547) is a class I proto-stellar source located in the nearby Taurus star-forming region. Its circumstellar environment is characterized by extended dust emission with complex structures and conspicuous filaments. A faint companion, called TMR-1C, located near the proto-star was detected in previous studies, but its natu…
XMM-Newton observations of the hot spot galaxy NGC 2903
Ebrero, J.; Pérez-Ramírez, D.; Leon, S. +1 more
We report on the first deeper X-ray broad-band observation of the hot spot galaxy NGC 2903 obtained with XMM-Newton. X-ray imaging and spectra of the spiral barred galaxy NGC 2903 were obtained from XMM-Newton archival data to study its X-ray population and the conditions of the hot gas in its central region. We investigate the spectral properties…
The Earth Orientation Catalog 4 . An optical reference frame for monitoring Earth's orientation in the 20th century
Vondrák, J.; Štefka, V.
Context. The astrometric ground-based observations of latitude/universal time variations, covering the interval 1899.7-2003.0, were used in combination with Hipparcos/Tycho positions and some older ground-based catalogs to construct a family of catalogs, tailored to long-term Earth-rotation studies. These catalogs, called Earth Orientation Catalog…
V945 Centauri = HD 112409: a bright hot short-period binary in a triple system?
Aerts, C.; Prša, A.; Harmanec, P. +2 more
A detailed analysis of multicolour Geneva photometry and high-resolution echelle spectroscopy of the B8.5V star V945 Cen (HD 112409, V = 5.2 m) whose short-term periodic variability was first detected from the HIPPARCOS data, led to the finding that the object is an ellipsoidal variable and a close double-lined spectroscopic binary with a 0.6496° …
UV emission line shifts of symbiotic binaries
Friedjung, M.; Mikołajewska, J.; Zajczyk, A. +1 more
Aims: Relative and absolute emission line shifts have been previously found for symbiotic binaries, but their cause was not clear. This work aims to better understand the emission line shifts.
Methods: Positions of strong emission lines were measured on archival UV spectra of Z And, AG Dra, RW Hya, SY Mus and AX Per and relative shifts b…
A precise modeling of Phoebe's rotation
Souchay, J.; Cottereau, L.; Aleshkina, E.
Aims: Although the rotation of some Saturn's satellites in spin-orbit has already been studied by several authors, this is not the case for the rotation of Phoebe, which stands out because it is non-resonant. The purpose of the paper is to determine for the first time and with precision its precession-nutation motion.
Methods: We adopt a…
Non-parametric deprojection of surface brightness profiles of galaxies in generalised geometries
Chakrabarty, D.
Aims: We present a new Bayesian non-parametric deprojection algorithm DOPING (Deprojection of Observed Photometry using an INverse Gambit), that is designed to extract 3-D luminosity density distributions ρ from observed surface brightness maps I, in generalised geometries, while taking into account changes in intrinsic shape with radius, usi…
The secondary eclipse of the transiting exoplanet CoRoT-2b (Corrigendum)
Mazeh, T.; Aigrain, S.; Alapini, A. +5 more
Based on observations obtained with CoRoT, a space project operated by the French Space Agency, CNES, with participation of the Science Programme of ESA, ESTEC/RSSD, Austria, Belgium, Brazil, Germany and Spain.
Deep near-infrared imaging of the HE0450-2958 system
Magain, P.; Letawe, G.
Context. The QSO HE0450-2958 and the companion galaxy with which it is interacting, both ultra luminous in the infrared, have been the subject of much attention in recent years, as the quasar host galaxy remained undetected. This led to various interpretations on QSO and galaxy formation and co-evolution, such as black hole ejection, jet induced s…
X-ray spectral study of hot gas in three clusters of galaxies
Kaastra, J. S.; de Plaa, J.; Costantini, E. +4 more
Aims: We studied the physical properties of three clusters of galaxies, selected from a BeppoSAX wide field camera (WFC) survey. These sources are identified as