Search Publications
Giant outburst of EXO 2030+375: pulse-phase resolved analysis of INTEGRAL data
Klochkov, D.; Santangelo, A.; Ferrigno, C. +1 more
In June-September 2006 the Be/X-ray binary EXO 2030+375 experienced the second giant outburst since its discovery. The source was shown to have a complicated pulse-averaged X-ray spectral continuum with possible evidence of cyclotron absorption features. In this paper we present the first pulse-phase resolved analysis of the broad band X-ray spect…
Molecular jets driven by high-mass protostars: a detailed study of the IRAS 20126+4104 jet
Eislöffel, J.; Nisini, B.; Giannini, T. +2 more
Context: Protostellar jets from intermediate- and high-mass protostars provide an excellent opportunity to understand the mechanisms responsible for intermediate- and high-mass star-formation. A crucial question is if they are scaled-up versions of their low-mass counterparts. Such high-mass jets are relatively rare and, usually, they are distant …
Absorption features in the spectra of X-ray bursting neutron stars
Rauch, T.; Werner, K.; Suleimanov, V.
Context: The discovery of photospheric absorption lines in XMM-Newton spectra of the X-ray bursting neutron star in
Mg II h+k emission lines as stellar activity indicators of main sequence F-K stars
Buccino, A. P.; Mauas, P. J. D.
Context: The largest dataset of stellar activity measurements available at present is the one obtained at the Mount Wilson Observatory, where high-precision Ca II H+K fluxes have been measured from 1966 for about 2200 stars. Since the Mg II h and k lines at λ2800 Å are formed in a similar way to the Ca II H+K emission lines, they are also good ind…
XMM-Newton X-ray study of early type stars in the Carina OB1 association
van der Hucht, K. A.; Rauw, G.; Vreux, J. -M. +2 more
Aims:X-ray properties of the stellar population in the Carina OB1 association are examined with special emphasis on early-type stars. Their spectral characteristics provide some clues to understanding the nature of X-ray formation mechanisms in the winds of single and binary early-type stars.
Methods: A timing and spectral analysis of five obs…
Radiation transport of heliospheric Lyman-α from combined Cassini and Voyager data sets
Quemerais, E.; Möbius, E.; Bzowski, M. +15 more
Aims: Heliospheric neutral hydrogen scatters solar Lyman-α radiation from the Sun with “27-day” intensity modulations observed near Earth due to the Sun's rotation combined with Earth's orbital motion. These modulations are increasingly damped in amplitude at larger distances from the Sun due to multiple scattering in the heliosphere, providing a …
The characteristics of the IR emission features in the spectra of Herbig Ae stars: evidence for chemical evolution
Waters, L. B. F. M.; Henning, T.; Tielens, A. G. G. M. +4 more
Context: Infrared (IR) spectra provide a prime tool to study the characteristics of polycyclic aromatic hydrocarbon (PAH) molecules in regions of star formation. Herbig Ae/Be stars are a class of young pre-main sequence stellar objects of intermediate mass. They are known to have varying amounts of natal cloud material still present in their direc…
Carriers of the mid-IR emission bands in PNe reanalysed. Evidence of a link between circumstellar and interstellar aromatic dust
Joblin, C.; Szczerba, R.; Berné, O. +1 more
Context: It has been shown that the diversity of the aromatic emission features can be rationalized into different classes of objects, in which differences between circumstellar and interstellar matter are emphasised.
Aims: We probe the links between the mid-IR emitters observed in planetary nebulae (PNe) and their counterparts in the interste…
A 2163: Merger events in the hottest Abell galaxy cluster. I. Dynamical analysis from optical data
Arnaud, M.; Pratt, G. W.; Bourdin, H. +7 more
Context: A 2163 is among the richest and most distant Abell clusters, presenting outstanding properties in different wavelength domains. X-ray observations have revealed a distorted gas morphology and strong features have been detected in the temperature map, suggesting that merging processes are important in this cluster. However, the merging sce…
Flare lines in Hinode EIS spectra
Del Zanna, G.
We aim to identify the brightest hot emission lines in Hinode EIS spectra, and suggest the best ones to be used in flare observations. The EIS database was searched in order to find suitable datasets to identify the prominent lines. A B2-class flare spectrum was found. Most previous identifications are confirmed, however some are revised by noting…