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pro vyhledávání: '"Córsico, Alejandro H."'
Ultra-massive H-rich (DA spectral type) white dwarf stars ($M_{\star} > 1.05 M_{\odot}$) are expected to be substantially crystallized by the time they reach the ZZ Ceti instability strip ($T_{\rm eff} \sim 12\,000$ K). Crystallization leads to a sep
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8c55c32aada50c0aa114c0779e8ea579
http://arxiv.org/abs/2302.04100
http://arxiv.org/abs/2302.04100
Autor:
Althaus, Leandro G., Córsico, Alejandro H., Camisassa, María E., Torres, Santiago, Gil-Pons, Pilar, Rebassa-Mansergas, Alberto, Raddi, Roberto
We employ the La Plata stellar evolution code, LPCODE, to compute the first set of constant rest-mass carbon-oxygen ultra-massive white dwarf evolutionary sequences for masses higher than 1.29 Msun that fully take into account the effects of general
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d5327066c60304262af8bdcd60edeb4e
Autor:
Calcaferro, Leila M., Córsico, Alejandro H., Althaus, Leandro G., Lopez, Isaac D., Hermes, J. J.
(Abridged) We present an exploration of the internal rotation of GD 278, the first pulsating extremely low-mass white dwarf that shows rotational splittings within its periodogram. We assess the theoretical frequency splittings expected for different
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::69ed64214cf8dbf3d3c4724babe123f9
Asteroseismology is a powerful tool to infer the evolutionary status and chemical stratification of white dwarf (WD) stars, and to explore the physical processes that lead to their formation. This is particularly true for the variable H-rich atmosphe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::895813dce2aec5176f5ee3fecee42704
http://arxiv.org/abs/2205.14126
http://arxiv.org/abs/2205.14126
Autor:
Córsico, Alejandro H., Uzundag, Murat, Kepler, S. O., Althaus, Leandro G., Silvotti, Roberto, Bradley, Paul A., Baran, Andrzej S., Koester, Detlev, Bell, Keaton J., Romero, Alejandra D., Hermes, J. J., Fusillo, Nicola P. Gentile
The {\sl TESS} space mission has recently demonstrated its great potential to discover new pulsating white dwarf and pre-white dwarf stars, and to detect periodicities with high precision in already known white-dwarf pulsators. We report the discover
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c98c0eb67c4cbf1200488e192162e630
Autor:
Córsico, Alejandro H.
At present, a large number of pulsating white dwarf (WD) stars is being discovered either from Earth-based surveys such as the Sloan Digital Sky Survey, or through observations from space (e.g., the Kepler mission). The asteroseismological techniques
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ea30dd7c8b65702aac19747c078c83b6
Autor:
Camisassa, María E., Althaus, Leandro G., Rohrmann, René D., García-Berro, Enrique, Torres, Santiago, Córsico, Alejandro H., Wachlin, Felipe C.
We present a set of full evolutionary sequences for white dwarfs with hydrogen-deficient atmospheres. We take into account the evolutionary history of the progenitor stars, all the relevant energy sources involved in the cooling, element diffusion in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::eb88aab18e6543e1ee91ba7852038215
Recent years have witnessed the discovery of many low-mass ($\lesssim 0.45 M_{\odot}$) white dwarf (WD) stars --- expected to harbor He cores--- in the field of the Milky Way and in several galactic globular and open clusters. Recently, three pulsati
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9a4409a32d48e3489d76431947a274d5
Autor:
Romero, Alejandra D., Córsico, Alejandro H., Althaus, Leandro G., Bertolami, Marcelo M. Miller
We present a large bank of chemical profiles and pulsation periods suited for asteroseismological studies of ZZ Ceti (or DAV) variable stars. Our background equilibrium DA white dwarf models are the result of fully evolutionary computations that take
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::467ca076c5708cd83af6a45917f4aa59