Search Publications
Absorption of crystalline water ice in the far infrared at different temperatures
Krivov, A. V.; Löhne, T.; Mutschke, H. +2 more
The optical properties of ice in the far infrared are important for models of protoplanetary and debris disks. In this report, we derive a new set of data for the absorption (represented by the imaginary part of the refractive index κ) of crystalline water ice in this spectral range. The study includes a detailed inspection of the temperature depe…
The XMM deep survey in the CDF-S. VIII. X-ray properties of the two brightest sources
Brandt, W. N.; Vignali, C.; Gilli, R. +7 more
We present results from the deep XMM-Newton observations of the two brightest X-ray sources in the Chandra Deep Field South (CDFS), PID 203 (z = 0.544) and PID 319 (z = 0.742). The long exposure of 2.5 Ms over a 10 year period (net 4 yr with a 6 yr gap) makes it possible to obtain high quality X-ray spectra of these two Type I AGN with X-ray lumin…
Photochemical response to the variation of temperature in the 2011-2012 stratospheric vortex of Saturn
Fletcher, L. N.; Hartogh, P.; Hue, V. +4 more
Context. A hot vortex formed in the stratosphere of Saturn following the 2010-2011 Northern Storm. Huge temperature increases have been measured in the vortex around the millibar level. Enhancements in hydrocarbon abundances have been observed at the millibar level in 2011-2012 inside this vortex.
Aims: We model the time-dependent photochemis…
The fundamental parameters of the Ap star 78 Virginis. Could 78 Vir be a rapidly oscillating Ap star?
Meilland, A.; Sturmann, J.; Sturmann, L. +11 more
Context. Determining the effective temperature of Ap stars, including the roAp stellar pulsators, is a difficult task owing to their strong magnetic field and their related spotted surfaces. It is, however, an important step towards constraining models of their complex atmosphere and testing proposed pulsation excitation mechanisms.
Aims: Usi…
A complete radio study of SNR G15.4+0.1 from new GMRT observations
Surnis, M. P.; Castelletti, G.; Supan, L. +2 more
Aims: The supernova remnant (SNR) G15.4+0.1 is considered to be the possible counterpart of the γ-ray source HESS J1818-154. With the goal of getting a complete view of this remnant and understanding the nature of the γ-ray flux, we conducted a detailed radio study that includes the search for pulsations and a model of the broadband emission …
Microwave thermal emission from the zodiacal dust cloud predicted with contemporary meteoroid models
Schwarz, Dominik J.; Dikarev, Valery V.
Predictions of the microwave thermal emission from the zodiacal dust cloud are made using several contemporary meteoroid models to construct the distributions of the cross-section area of dust in space, and by applying the Mie light-scattering theory to estimate the temperatures and emissivities of dust particles in a wide range of sizes and helio…
Herschel SPIRE-FTS observations of RCW 120
Abergel, A.; Le Bourlot, J.; Le Petit, F. +5 more
Context. The expansion of Galactic H ii regions can trigger the formation of a new generation of stars. However, little is know about the physical conditions that prevail in these regions.
Aims: We study the physical conditions that prevail in specific zones towards expanding H ii regions that trace representative media such as the photodisso…
Water production rate of comet C/1997 H2 (SOHO) near perihelion
Mancuso, Salvatore
Comet C/1997 H2 is a non-Kreutz comet that was observed near perihelion at 0.137 AU on 1997 May 2 with the Ultraviolet Coronagraph Spectrometer (UVCS) aboard the Solar and Heliospheric Observatory (SOHO) satellite. The observed H i Lyman α radiance profile at 1215.67 Å, which was obtained during the crossing of the cometary coma through the UVCS s…
A hot bubble at the centre of M 81
Ricci, T. V.; Steiner, J. E.; Giansante, L.
Context. Messier 81 has the nearest active nucleus with broad Hα emission. A detailed study of this galaxy's centre is important for understanding the innermost structure of the AGN phenomenon.
Aims: Our goal is to seek previously undetected structures using additional techniques to reanalyse a data cube obtained with the GMOS-IFU installed o…
WISE J061213.85-303612.5: a new T-dwarf binary candidate
Minniti, D.; Huélamo, N.; Mawet, D. +8 more
Context. T and Y dwarfs are among the coolest and least luminous objects detected, and they can help to understand the properties of giant planets. Up to now, there are more than 350 T dwarfs that have been identified thanks to large imaging surveys in the infrared, and their multiplicity properties can shed light on the formation process.
Ai…