Search Publications
New composite supernova remnant toward HESS J1844-030?
Petriella, A.
Aims: HESS J1844-030 is a newly confirmed TeV source in the direction of the X-ray pulsar wind nebula (PWN) candidate G29.4+0.1 and the complex radio source G29.37+0.1, which is likely formed by the superposition of a background radio galaxy and a Galactic supernova remnant (SNR). Many scenarios have been proposed to explain the origin of HES…
A new fitting concept for the robust determination of Sérsic model parameters
Amarantidis, Stergios; Breda, Iris; Papaderos, Polychronis +1 more
Context. The Sérsic law (SL) offers a versatile, widely used functional form for the structural characterization of galaxies near and far. Whereas fitting this three-parameter function to galaxies with a genuine SL luminosity distribution (e.g., several local early-type galaxies-ETGs) yields a robust determination of the Sérsic exponent η and effe…
VEXAS: VISTA EXtension to Auxiliary Surveys. Data Release 1. The southern Galactic hemisphere
Agnello, A.; Spiniello, C.
Context. We present the first public data release of the VISTA EXtension to Auxiliary Surveys (VEXAS), comprising nine cross-matched multi-wavelength photometric catalogues where each object has a match in at least two surveys.
Aims: Our aim is to provide spatial coverage that is as uniform as possible in the multi-wavelength sky and to provi…
Properties and nature of Be stars. 31. The binary nature, light variability, physical elements, and emission-line changes of HD 81357
Frémat, Y.; Harmanec, P.; Yang, S. +10 more
Reliable determination of the basic physical properties of hot emission-line binaries with Roche-lobe filling secondaries is important for developing the theory of mass exchange in binaries. It is not easy, however, due to the presence of circumstellar matter. Here, we report the first detailed investigation of a new representative of this class o…
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…