Search Publications
Direct imaging of extra-solar planets in star forming regions. Lessons learned from a false positive around IM Lupi
Absil, O.; Augereau, J. -C.; Surdej, J. +8 more
Context. Most exoplanet imagers consist of ground-based adaptive optics coronagraphic cameras which are currently limited in contrast, sensitivity and astrometric precision, but advantageously observe in the near-infrared window (1-5 µm). Because of these practical limitations, our current observational aim at detecting and characterizing pl…
Unveiling the nucleus of NGC 7172
Eckart, A.; Zuther, J.; Smajić, S. +1 more
Aims: We present the results of near-infrared (NIR) H + K European Southern Observatory SINFONI integral field spectroscopy (IFS) of the Seyfert 2 galaxy
Studying the kinematic asymmetries of disks and post-coalescence mergers using a new "kinemetry" criterion
Colina, L.; Arribas, S.; Bellocchi, E.
Context. Ultra luminous and luminous infrared galaxies [(U)LIRGs] are important galaxy populations for studying galaxy evolution, and are likely to have been responsible for a significant fraction of the star formation that occurred prior to z ~ 1. Local (U)LIRGs can be used to study criteria that are suitable for characterizing similar high redsh…
Chemistry of C3 and carbon chain molecules in DR21(OH)
Menten, K. M.; Krełowski, J.; Csengeri, T. +14 more
Context. C3 is the smallest pure carbon chain detected in the dense environment of star-forming regions, although diatomic C2 is detected in diffuse clouds. Measurement of the abundance of C3 and the chemistry of its formation in dense star-forming regions has remained relatively unexplored.
Aims: We aim to id…
Stellar laboratories: new Ge V and Ge VI oscillator strengths and their validation in the hot white dwarf RE 0503-289
Rauch, T.; Werner, K.; Kruk, J. W. +2 more
Context. State-of-the-art spectral analysis of hot stars by means of non-LTE model-atmosphere techniques has arrived at a high level of sophistication. The analysis of high-resolution and high-S/N spectra, however, is strongly restricted by the lack of reliable atomic data for highly ionized species from intermediate-mass metals to trans-iron elem…
A new super-soft X-ray source in the Small Magellanic Cloud: Discovery of the first Be/white dwarf system in the SMC?
Pietsch, W.; Haberl, F.; Mereghetti, S. +5 more
Context. The Small Magellanic Cloud (SMC) hosts a large number of Be/X-ray binaries, however no Be/white dwarf system is known so far, although population synthesis calculations predict that they might be more frequent than Be/neutron star systems.
Aims: XMMU J010147.5-715550 was found as a new faint super-soft X-ray source (SSS) with a likel…
Modelling a high-mass red giant observed by CoRoT
Auvergne, M.; Baudin, F.; Michel, E. +15 more
Context. The advent of space-borne photometers such as CoRoT and Kepler has opened up new fields in asteroseismology. This is especially true for red giants as only a few of these stars were known to oscillate with small amplitude, solar-like oscillations before the launch of CoRoT.
Aims: The G6 giant HR 2582 (HD 50890) was observed by CoRoT …
Deep Chandra observation of the galaxy cluster WARPJ1415.1+3612 at z =1 . An evolved cool-core cluster at high redshift
Tozzi, P.; Rosati, P.; Nonino, M. +2 more
Aims: Using the deepest (370 ks) Chandra observation of a high-redshift galaxy cluster, we perform a detailed characterization of the intra-cluster medium (ICM) of WARPJ1415.1+3612 at z = 1.03, particularly its core region. We also explore the connection between the ICM core properties and the radio/optical properties of the brightest cluster…
Extended soft X-ray emission in 3CR radio galaxies at z < 0.3: high excitation and broad line galaxies
Macchetto, F. D.; Capetti, A.; Grandi, P. +11 more
We analyze Chandra observations of diffuse soft X-ray emission associated with a complete sample of 3CR radio galaxies at z < 0.3. We focus on the properties of the spectroscopic sub-classes of high excitation galaxies (HEGs) and broad line objects (BLOs). Among the 33 HEGs we detect extended (or possibly extended) emission in about 40% of the …
Rotational motion of Phobos
Rosenblatt, P.; Le Maistre, S.; Rambaux, N. +1 more
Context. Phobos is in synchronous spin-orbit resonance around Mars, like our Moon around the Earth. As a consequence, the rotational period of Phobos is equal in average to its orbital period. The variations of its rotational motion are described by oscillations, called physical librations, which yield information of its interior structure. The la…