Search Publications
IGR J16194-2810: a new symbiotic X-ray binary
Masetti, N.; Charles, P. A.; Bird, A. J. +7 more
We here report on the multiwavelength study which led us to the identification of X-ray source IGR J16194-2810 as a new Symbiotic X-ray Binary (SyXB), that is, a rare type of Low Mass X-ray Binary (LMXB) composed of a M-type giant and a compact object. Using the accurate X-ray position allowed by Swift/XRT data, we pinpointed the optical counterpa…
A comparison of LBGs, DRGs, and BzK galaxies: their contribution to the stellar mass density in the GOODS-MUSIC sample
Pentericci, L.; Santini, P.; Fontana, A. +8 more
Context: The classification scheme for high redshift galaxies is complex at the present time, with simple colour-selection criteria (i.e. EROs, IEROs, LBGs, DRGs, BzKs), resulting in ill-defined properties for the stellar mass and star formation rate of these distant galaxies.
Aims: The goal of this work is to investigate the properties of dif…
X-ray emission from MP Muscae: an old classical T Tauri star
Peres, G.; Argiroffi, C.; Maggio, A.
Aims:We study the properties of X-ray emitting plasma of
OVII and OVIII line emission in the diffuse soft X-ray background: heliospheric and galactic contributions
Ballet, J.; Lallement, R.; Acero, F. +2 more
Aims:We study the 0.57 keV (O VII triplet) and 0.65 keV (O VIII) diffuse emission generated by charge transfer collisions between solar wind (SW) oxygen ions and interstellar H and He neutral atoms in the inner Heliosphere. These lines which dominate the 0.3-1.0 keV energy interval are also produced by hot gas in the galactic halo (GH) and possibl…
An updated survey of globular clusters in M 31. II. Newly discovered bright and remote clusters
Bellazzini, M.; Galleti, S.; Federici, L. +2 more
Aims:We present the first results of a large spectroscopic survey of candidate globular clusters located in the extreme outskirts of the nearby M 31 galaxy. The survey is aimed at ascertaining the nature of the selected candidates to increase the sample of confirmed M 31 clusters lying more that 2° away from the center of the galaxy.
Methods: …
X-ray monitoring of optical novae in M 31 from July 2004 to February 2005
Stiele, H.; Pietsch, W.; Haberl, F. +9 more
Context: Optical novae have recently been identified as the major class of supersoft X-ray sources in M 31 based on ROSAT and early XMM-Newton and Chandra observations.
Aims: This paper reports on a search for X-ray counterparts of optical novae in M 31 based on archival Chandra HRC-I and ACIS-I as well as XMM-Newton observations of the galaxy…
Multiple protostellar systems. II. A high resolution near-infrared imaging survey in nearby star-forming regions
Duchêne, G.; Ghez, A. M.; Bontemps, S. +3 more
Context: Multiple systems are the product of protostellar core fragmentation. Studying their statistical properties in young stellar populations therefore probes the physical processes at play during star formation.
Aims: Our project endeavors to obtain a robust view of multiplicity among embedded Class I and Flat Spectrum protostars in a wide…
A statistical analysis of X-ray variability in pre-main sequence objects of the Taurus molecular cloud
Audard, M.; Güdel, M.; Micela, G. +5 more
Context: This work is part of a systematic X-ray survey of the Taurus star-forming complex with XMM-Newton.
Aims: We study the time series of all X-ray sources associated with Taurus members, to statistically characterize their X-ray variability, and compare the results to those for pre-main sequence stars in the Orion Nebula Cluster and to ex…
The blue plume population in dwarf spheroidal galaxies. Genuine blue stragglers or young stellar population?
Gullieuszik, M.; Momany, Y.; Held, E. V. +3 more
Aims:Blue stragglers (BSS) in the Milky Way field and globular/open clusters are thought to be the product of either primordial or collisional binary systems. In the context of dwarf spheroidal galaxies it is hard to firmly disentangle a genuine BSS population from young main sequence (MS) stars tracing a ∼ 1-2 Gyr old star forming episode.
Me…
X-ray/ultraviolet observing campaign of the Markarian 279 active galactic nucleus outflow: a close look at the absorbing/emitting gas with Chandra-LETGS
Kaastra, J. S.; Kriss, G. A.; Arav, N. +12 more
We present a Chandra-LETGS observation of the Seyfert 1 galaxy