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X-rays and TESS observations of symbiotic binary stars
Nuñez, N. E.; Mukai, K.; Sokoloski, J. L. +5 more
Symbiotic stars are strongly interacting binaries composed of a white dwarf accreting from its red giant companion. We studied five symbiotics stars: BD~Cam, V1261~Ori, NQ~Gem, CD~-27~8661, CD~-36~8436 using observations from the Swift/XRT and XMM-Newton satellites in X-rays and from TESS in the optical. The X-ray spectra were fit with absorbed op…
Parámetros astrofísicos de cúmulos abiertos ubicados en el tercer y cuarto cuadrante de la Galaxia
Baracchi, M. A.; Colazo, A. D. V.; Rodríguez-Buss, C. M. +7 more
As part of new project in the framework of the activities of the subject `Astrofísica General} (FaMAF, UNC), we present astrophysical parameters of open clusters located in the third and fourth Galactic quadrant: NGC 2243, NGC 2439, Pi 12, Tr 13 and NGC 5168. Based on Gaia DR3 photometric data and fitting theoretical isochrones to the color-magnit…
NGC 2659: a probable binary cluster
Perren, G. I.; Pera, M. S.; Giorgi, E. E. +2 more
We present and discuss photometric data, proper motions and parallaxes in a field of a 30'x30' centred in the area centered in the open cluster NGC 2659 in the region of Vela. In recent papers on the same region evidences of the presence of another cluster close to the north-east of NGC 2659 have been reported. Data were extracted from Gaia EDR3 a…
Parámetros estructurales de cúmulos abiertos y su comportamiento en presencia de compañeros cercanos
Baume, G.; Rodríguez, M. J.; Feinstein, C. +3 more
The study of a relevant and homogeneous sample of open clusters is presented with the aim of analysing the internal structure in clusters that are part of binary or multiple systems. In the applied procedure we used the astrometric and photomeric data provided by the Gaia survey (DR2) and the membership probabilities of its members obtained from c…
Generating a unified catalogue of open clusters and their most probable members
Perren, G. I.; Pera, M. S.; Navone, H. D. +1 more
In this work we present the largest database of open clusters catalogued to date. To obtain it we combine almost a dozen existing databases of open clusters to generate a cross-matched list of more than 5000 unique objects, scattered throughout the Galaxy. In addition, we process around 2000 of these clusters with a new membership algorithm code; …
Caracterización del sistema HD 196385 mediante imagen directa, velocidad radial y astrometría
García, L. H.; Petrucci, R.; Jofré, E. +1 more
In this paper we present a characterization of the relative orbit of HD 196385B combining data from direct imaging, radial velocity, and proper motions from the Hipparcos and Gaia missions. To perform a joint fit of the data, we used the code orvara. From the fit, we obtained ranges of possible values for the major semi-axis, the mass of the secon…