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Determinación de los parámetros H y G para 4000 asteroides del catálogo Gaia DR2

Duffard, R.; Colazo, M.; Weidmann, W.

The Gaia mission will provide the scientific community with high- quality observations of ∼ 300,000 asteroids of all categories. The purpose of this work is to obtain a catalog of phase function parameters (H and G) for all the asteroids that are observed by the Gaia mission and which were published in the DR2 catalogue. For this purpose, we intro…

NGC 2660: Gaia DR2, ASteCA and the end of controversies?

Perren, G. I.; Pera, M. S.; Vázquez, R. A. +4 more

NGC 2660, an old and very compact open cluster placed at about 3 kpc from the Sun in a region of moderate absorption, has been subject of several photometric and spectroscopic studies in the past. Controversies arise in terms of its distance, age and metal content. Previous comparisons with cluster synthetic models carried out did not resolve them…

Investigando la zona de los cúmulos inmersos DBS 114-115-117

Baume, G.; Borissova, J.; Ramirez Alegria, S.

A preliminary study of the stellar population has been carried out in the area of the immersed clusters DBS 114, 115 and 117. The information provided by various astronomical databases and data available in the literature has been used. Photometric data in the optical (VPHAS +, GAIA), near infrared (2MASS-VVV) and mid infrared (WISE) has been incl…

Fine structure of the main sequence of NGC 2516 scrutinized with Gaia andASteCA

Perren, G. I.; Pera, M. S.; Navone, H. D. +3 more

The fine structure of the open cluster NGC 2516 is investigated. This is an extended and relatively young open cluster subtending over two degrees in the sky, situated at just a few hundred PARSECs (< 400 pc) from the Sun. We collected Gaia DR2 data (G magnitude down to G=19, BP-RP color index, proper motions, and parallaxes) for more than 400,…

Modeling of emission lines in low-ionization windsof B-type stars

Kraus, M.; Cidale, L. S.; Torres, A. F. +2 more

Motivated by the availability of new observational material provided by Gaia mission, and focused on peculiar B-type stars, we develop a model to simulate the non-LTE line profiles of ionized elements such as Ca II and Mg II. The calculation is performed for a range of effective temperature and surface gravity, for different temperature and veloci…