Search Publications
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…
X-ray emission from the microquasar S26 observed by XMM-Newton
Romero, G. E.; Rizzo, F. N.; Sotomayor Checa, P.
S26 is the microquasar with the most powerful jets observed in accreting stellar sources. The estimated kinetic power for its jets is of the order of the bolometric luminosity of some ultraluminous X-ray sources. If this power is coupled to the matter accretion onto the compact object, then S26 must be a super-accreting binary, similar to the gala…
Observaciones del remanente de supernova G296.5+10.0 con el satélite XMM-Newton
Combi, J. A.; Eppens, L. K.; Reynoso, E. M.
G296.5+10.0 is a 90' × 65'-size supernova remnant (SNR) that displays a bilateral distribution in the radio band with the symmetry axis perpendicular to the Galactic Plane. The remnant shows two emission peaks at the South-East and South-West of the radio shell. In addition, the EXOSAT instrument detected an extended X-ray plasma with an axisymmet…
Análisis cinemático de una eyección coronal de masa de 10 a 46 radios solares
Cremades, H.; Balmaceda, L. A.; Di Lorenzo, L.
In this work we perform the three-dimensional reconstruction (3D) of the morphology of a coronal mass ejection (CME), in the range of heliocentric distances of approximately 10 to 46 solar radii. The event occurs on 2 April 2019, and we use observations made by LASCO-C3 aboard the Solar and Heliospheric Observatory (SOHO), SECCHI-COR2 and HI-1 abo…
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)…