Search Publications
IGR J17451-3022: A dipping and eclipsing low mass X-ray binary
Ponti, G.; Romano, P.; Ferrigno, C. +10 more
In this paper we report on the available X-ray data collected by INTEGRAL, Swift, and XMM-Newton during the first outburst of the INTEGRAL transient IGR J17451-3022, discovered in 2014 August. The monitoring observations provided by the JEM-X instruments on board INTEGRAL and the Swift /XRT showed that the event lasted for about 9 months and that …
Investigating the cores of fossil systems with Chandra
Bharadwaj, V.; Sanders, J. S.; Reiprich, T. H. +1 more
Aims: We aim to systematically investigate the cores of a sample of fossil galaxy groups and clusters ("fossil systems"), using Chandra data, to see what hints they can offer about the properties of the intracluster medium in these particular objects.
Methods: We chose a sample of 17 fossil systems from literature with archival Chandra d…
Long-term R and V-band monitoring of some suitable targets for the link between ICRF and the future Gaia celestial reference frame
Souchay, J.; Taris, F.; Andrei, A. +3 more
Context. The Gaia astrometric mission of the European Space Agency was launched on December 2013. It will provide a catalog of 500 000 quasars. Some of these targets will be chosen to build an optical reference system that will be linked to the International Celestial Reference Frame (ICRF). The astrometric coordinates of these sources will have r…
Two evolved supernova remnants with newly identified Fe-rich cores in the Large Magellanic Cloud
Haberl, F.; Filipović, M. D.; Maggi, P. +7 more
Aims: We present a multi-wavelength analysis of the evolved supernova remnants
Methods: We used observational data from XMM-Newton, the Australian Telescope Compact Array, and the Magellanic Cloud Emission Line Survey to study their…
Polarimetry of comets 67P/Churyumov-Gerasimenko, 74P/Smirnova-Chernykh, and 152P/Helin-Lawrence
Jones, G. H.; Muinonen, K.; Protopapa, S. +5 more
Aims: Polarimetric characteristics of comets at large heliocentric distances is a relatively unexplored area; we extend the idea by adding and analysing the data for three Jupiter family comets (JFCs).
Methods: With the FORS2 instrument of the ESO VLT, we performed quasi-simultaneous photometry and polarimetry of three active JFCs 67P/Ch…
GTC/CanariCam observations of (99942) Apophis
Alvarez, C.; Delbo, M.; Licandro, J. +2 more
Context. The potentially hazardous asteroid (PHA) (99942) Apophis is one of the most remarkable near-Earth asteroids (NEA) in terms of impact hazard. A good determination of its surface thermal inertia is very important in order to evaluate the Yarkovsky effect on its orbital evolution.
Aims: We present thermal infrared observations obtained …
Morphological classification of local luminous infrared galaxies
Le Floc'h, E.; Armus, L.; Charmandaris, V. +6 more
We present analysis of the morphological classification of 89 luminous infrared galaxies (LIRGs) from the Great Observatories All-sky LIRG Survey (GOALS) sample, using non-parametric coefficients and compare their morphology as a function of wavelength. We rely on images that were obtained in the optical (B- and I-band) as well as in the infrared …
Evolutionary status of isolated B[e] stars
Liu, Sheng-Yuan; Chen, Wen-Ping; Lee, Chien-De
Aims: We study a sample of eight B[e] stars with uncertain evolutionary status to shed light on the origin of their circumstellar dust.
Methods: We performed a diagnostic analysis on the spectral energy distribution beyond infrared wavelengths, and conducted a census of neighboring region of each target to ascertain its evolutionary stat…
Herschel observations of the nebula M1-67 around the Wolf-Rayet star WR 124
Barlow, M. J.; Groenewegen, M. A. T.; Waelkens, C. +3 more
Infrared Herschel imaging and spectroscopic observations of the nebula M1-67 around the Wolf-Rayet star WR 124 have been obtained along with optical imaging observations. The infrared images reveal a clumpy dusty nebula that extends up to 1 pc. The comparison with the optical images shows that the ionized gas nebula coincides with the dust nebula,…
Tracing back the evolution of the candidate LBV HD 168625
Mahy, L.; Waelkens, C.; Royer, P. +1 more
Context. The luminous blue variable phase is a crucial transitory phase that is not clearly understood in the massive star evolution.
Aims: We have obtained far-infrared Herschel/PACS imaging and spectroscopic observations of the nebula surrounding the candidate LBV HD 168625. By combining these data with optical spectra of the central star, …