Search Publications
Herschel observations of the debris disc around HIP 92043
Krivov, A. V.; Eiroa, C.; Löhne, T. +16 more
Context. Typical debris discs are composed of particles ranging from several micron sized dust grains to km sized asteroidal bodies, and their infrared emission peaks at wavelengths 60-100 µm. Recent Herschel DUNES observations have identified several debris discs around nearby Sun-like stars (F, G and K spectral type) with significant exces…
ODIN: a new model and ephemeris for the Pluto system
Colas, F.; Lainey, V.; Robert, V. +2 more
Because of Pluto's distance from the Sun, the Pluto system has not yet completed a revolution since its discovery, hence an uncertain heliocentric distance. In this paper, we present the fitting of our dynamical model ODIN (Orbite, Dynamique et Intégration Numérique) to observations. The small satellites P4 and P5 are not taken into account. We fi…
An XMM-Newton search for X-ray sources in the Fornax dwarf galaxy
Nucita, A. A.; De Paolis, F.; Ingrosso, G. +2 more
We report the results of a deep archive XMM-Newton observation of the Fornax spheroidal galaxy that we analyzed with the aim of fully characterizing the X-ray source population (in most of the cases likely to be background active galactic nuclei) detected towards the target. A cross correlation with the available databases allowed us to find a sou…
X-ray, optical, and infrared investigation of the candidate supergiant fast X-ray transient IGR J18462 - 0223
Masetti, N.; Sidoli, L.; Bird, A. J. +4 more
We report on a broad-band X-ray study (0.5-60 keV) of the poorly known candidate supergiant fast X-ray transient (SFXT) IGR J18462 - 0223, and on optical and near-infrared (NIR) followup observations of field objects. The out-of-outburst X-ray state has been investigated for the first time with archival INTEGRAL/IBIS, ASCA, Chandra, and Swift/XRT …
Ultraluminous X-ray source XMMUJ132218.3-164247 is in fact a type I Quasar
Cappi, M.; Ponti, G.; Masetti, N. +5 more
Context. The true nature of ultraluminous X-ray sources (ULX) is still currently vigorously debated. One of the most interesting possibilities is that these sources are intermediate-mass (M ~ 103 - 105 M⊙) black holes. The most luminous ULX (L2 - 10 keV ~ 1041 erg s-1) are the most …
Spectral characteristics of the Titanian haze at 1-5 micron from Cassini/VIMS solar occultation data
Courtin, Régis; Kim, Sang J.
We retrieved optical-depth spectra of the Titanian haze in the range 1-5 µm from solar occultation data obtained by the Cassini/Visual Infrared Mapping Spectrometer (VIMS) at altitudes of 59-502 km. Only limited wavelength intervals within this spectral range have been analyzed before. The haze spectra we retrieved are mostly similar to thos…
Differential asteroseismic study of seismic twins observed by CoRoT. Comparison of HD 175272 with HD 181420
Auvergne, M.; Baudin, F.; García, R. A. +13 more
Context. The CoRoT short asteroseismic runs give us the opportunity to observe a large variety of late-type stars through their solar-like oscillations. We report the observation and modeling of the F5V star HD 175272.
Aims: Our aim is to define a method for extracting as much information as possible from a noisy oscillation spectrum.
Me…
Large-scale mapping of the massive star-forming region RCW38 in the [CII] and PAH emission
Nakagawa, T.; Ojha, D. K.; Fukui, Y. +10 more
Aims: We investigate the large-scale structure of the interstellar medium (ISM) around the massive star cluster RCW 38 in the [CII] 158 µm line and polycyclic aromatic hydrocarbon (PAH) emission.
Methods: We carried out [CII] line mapping of an area of ~30' × 15' for RCW 38 by a Fabry-Perot spectrometer on a 100 cm balloon-borne te…
Spectroastrometry of rotating gas disks for the detection of supermassive black holes in galactic nuclei. III. CRIRES observations of the Circinus galaxy
Marconi, A.; Capetti, A.; Axon, D. J. +2 more
We present new CRIRES spectroscopic observations of the Brγ emission line in the nuclear region of the Circinus galaxy, obtained with the aim of measuring the black hole (BH) mass with the spectroastrometric technique. The Circinus galaxy is an ideal benchmark for the spectroastrometric technique given its proximity and secure BH measurement obtai…
XMM-Newton and Chandra observations of G272.2-3.2. Evidence of stellar ejecta in the central region
Bocchino, F.; Combi, J. A.; Martí, J. +4 more
Aims: We aim to study the spatial distribution of the physical and chemical properties of the X-ray emitting plasma of the supernova remnant G272.2-3.2 in order to obtain important constraints on its ionization stage, the progenitor supernova explosion, and the age of the remnant.
Methods: We report on combined XMM-Newton and Chandra ima…