Search Publications
Red-skewed Kα iron lines in GX 13+1
Maiolino, T.; Titarchuk, L.; Frontera, F. +2 more
Context. Broad, asymmetric, and red-skewed Fe Kα emission lines have been observed in the spectra of low-mass X-ray binaries hosting neutron stars (NSs) as a compact object. Because more than one model is able to describe these features, the explanation of where and how the red-skewed Fe lines are produced is still a matter of discussio…
Revisiting the dust properties in the molecular clouds of the Large Magellanic Cloud
Juvela, M.; Ristorcelli, I.; Noriega-Crespo, A. +2 more
Context. Some Galactic molecular clouds show signs of dust evolution as compared to the diffuse interstellar medium, most of the time through indirect evidence such as color ratios, increased dust emissivity, or scattering (coreshine). These signs are not a feature of all Galactic clouds. Moreover, molecular clouds in the Large Magellanic Cloud (L…
A catalogue of oxygen-rich pulsating giants in the Galactic halo and the Sagittarius stream
Kendall, T. R.; Mauron, N.; Maurin, L. P. A.
To construct a catalogue of oxygen-rich (M) asymptotic giant branch (AGB) stars in the halo, complementing the catalogues of carbon-rich (C) stars, previous lists of Miras and SRa semi-regulars located in the northern hemisphere are merged and cleaned of various defects. After putting aside known C stars, characteristics such as colours and period…
Solar flares observed by Rosetta at comet 67P/Churyumov-Gerasimenko
Henri, P.; Edberg, N. J. T.; Simon Wedlund, C. +6 more
Context. The Rosetta spacecraft made continuous measurements of the coma of comet 67P/Churyumov-Gerasimenko (67P) for more than two years. The plasma in the coma appeared very dynamic, and many factors control its variability.
Aims: We wish to identify the effects of solar flares on the comet plasma and also their effect on the measurements b…
Faint solar analogues at the limit of no reddening. Precise atmospheric parameters from moderate low-resolution spectra
Porto de Mello, G. F.; Lorenzo-Oliveira, D.; Giribaldi, R. E. +2 more
Context. The flux distribution of solar analogues is required for calculating the spectral albedo of solar system bodies such as asteroids and trans-Neptunian objects. Ideally a solar analogue should be comparatively faint as the target of interest, but very few analogues fainter than V = 9 mag have been identified so far. Only atmospheric paramet…
Spatially resolving the atmosphere of the non-Mira-type AGB star SW Vir in near-infrared molecular and atomic lines with VLTI/AMBER
Ohnaka, K.; Hadjara, M.; Maluenda Berna, M. Y. L.
Aims: We present a near-infrared spectro-interferometric observation of the non-Mira-type, semiregular asymptotic giant branch star SW Vir. Our aim is to probe the physical properties of the outer atmosphere with spatially resolved data in individual molecular and atomic lines.
Methods: We observed SW Vir in the spectral window between 2…
SOPHIE velocimetry of Kepler transit candidates. XIX. The transiting temperate giant planet KOI-3680b
Bouchy, F.; Deleuil, M.; Moutou, C. +15 more
Whereas thousands of transiting giant exoplanets are known today, only a few are well characterized with long orbital periods. Here we present KOI-3680b, a new planet in this category. First identified by the Kepler team as a promising candidate from the photometry of the Kepler spacecraft, we establish here its planetary nature from the radial ve…
Quincuncial adaptive closed Kohonen (QuACK) map for the irregularly shaped comet 67P/Churyumov-Gerasimenko
Grieger, B.
Context. Standard global map projections cannot display the complete surface of a highly irregular body such as the Rosetta target comet 67P/Churyumov-Gerasimenko because different points on the surface can have the same longitude and latitude.
Aims: We present a concept of generalized longitudes and latitudes that allows us to display the co…
Electron acceleration at comet 67P/Churyumov-Gerasimenko
Nilsson, H.; Eriksson, A.; Goldstein, R. +6 more
We report the observation by the Ion and Electron Sensor (IES) of energetic (>1 keV) electrons in the plasma environment of comet 67P Churyumov-Gerasimenko (67P). Most of the electrons in the cometary coma are expected to be of solar wind, photoionization, or electron impact origin and are therefore not expected to exceed some hundreds of eV in…
CIELO-RGS: a catalog of soft X-ray ionized emission lines
Grinberg, Victoria; Kretschmar, Peter; Guainazzi, Matteo +9 more
Context. High-resolution X-ray spectroscopy has advanced our understanding of the hot Universe by revealing physical properties like kinematics, temperature, and abundances of the astrophysical plasmas. Despite technical and scientific achievements, the lack of scientific products at a level higher than count spectra is hampering complete scientif…