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White-dwarf asteroseismology with the TESS space telescope

Córsico, A. H.

As white-dwarf (WD) stars cool, they go through one or more stages of g(gravity)-mode pulsational instability, becoming multiperiodic variable stars. Stars passing through these instability domains allow astronomers to study their interiors through asteroseismological techniques, as if they could ``look'' at their interiors by analyzing the spectr…

The Galaxy structure across the Vela Gum

Pera, M. S.; Vázquez, R. A.; Giorgi, E. E. +3 more

We present first and preliminary results of a study on the open cluster population seen against the Gum Nebula. This is a very large and nearby emission gas structure covering from l=240° to l=270° and from b=+8° to b=-15°, approximately. Taking advantage of the impressive precision and depth (G≈ 20) of data provided by the Gaia mission (EDR3) and…

A study of the Galactic HI supershell GS 121-05-037

Molina Lera, J. A.; Cichowolski, S.; Suad, L. A.

GS 121-05-037 is a Galactic supershell located in the outer part of the Galaxy at (l, b) ∼ (121.°3, - 4.°8) at a distance of 3.2 ± 1 kpc from the Sun. In this work we estimated the kinetic energy of the feature to determine its possible origin. Several catalogued H II regions are located projected towards the supershell. With the aim of determinin…

An analysis of the twenty-five most distant open clusters

Perren, G. I.; Pera, M. S.; Navone, H. D. +2 more

We present an analysis of the twenty-five open cluster with the largest catalogued distances to the Sun (> 9 kpc). The clusters are selected after cross-matching the four largest published catalogs to date. Distance values in these catalogs show enormous differences between them. The data used to perform the analysis (astrometry and photometry)…