Zobrazeno 1 - 10
of 340
pro vyhledávání: '"Althaus, L. G."'
Autor:
Althaus, L. G., Camisassa, M. E., Torres, S., Battich, T., Corsico, A. H., Rebassa-Mansergas, A., Raddi, R.
Publikováno v:
A&A 668, A58 (2022)
We present the first set of constant rest-mass ultra-massive oxygen/neon white dwarf cooling tracks with masses larger than 1.29 Msun which fully take into account the effects of general relativity on their structural and evolutionary properties. We
Externí odkaz:
http://arxiv.org/abs/2208.14144
Autor:
Chen, J., Ferraro, F. R., Cadelano, M., Salaris, M., Lanzoni, B., Pallanca, C., Althaus, L. G., Cassisi, S., Dalessandro, E.
Recently, a new class of white dwarfs (``slowly cooling WDs'') has been identified in the globular cluster M13. The cooling time of these stars is increased by stable thermonuclear hydrogen burning in their residual envelope. These WDs are thought to
Externí odkaz:
http://arxiv.org/abs/2206.10039
A non negligible fraction of white dwarf stars show the presence of heavy elements in their atmospheres. The most accepted explanation for this contamination is the accretion of material coming from tidally disrupted planetesimals, which form a debri
Externí odkaz:
http://arxiv.org/abs/2109.11370
Autor:
Chen, J., Ferraro, F. R., Cadelano, M., Salaris, M., Lanzoni, B., Pallanca, C., Althaus, L. G., Dalessandro, E.
White Dwarfs (WDs) are the final evolutionary product of the vast majority of stars in the Universe. They are electron-degenerate structures characterized by no stable thermonuclear activity, and their evolution is generally described as a pure cooli
Externí odkaz:
http://arxiv.org/abs/2109.02306
Autor:
Rebassa-Mansergas, A., Solano, E., Jiménez-Esteban, F. M., Torres, S., Rodrigo, C., Ferrer-Burjachs, A., Calcaferro, L. M., Althaus, L. G., Córsico, A. H.
We use the data provided by the Gaia Early Data Release 3 to search for a highly-complete volume-limited sample of unresolved binaries consisting of a white dwarf and a main sequence companion (i.e. WDMS binaries) within 100pc. We select 112 objects
Externí odkaz:
http://arxiv.org/abs/2107.06303
Publikováno v:
2020svos.conf..297C
Ultra-massive hydrogen-rich (DA spectral type) white dwarf (WD) stars ($M_{\star} > 1M_{\odot}$) coming from single-star evolution are expected to harbor cores made of $^{16}$O and $^{20}$Ne, resulting from semi-degenerate carbon burning when the pro
Externí odkaz:
http://arxiv.org/abs/2001.00671
Many low-mass white dwarfs are being discovered in the field of our galaxy and some of them exhibit $g$-mode pulsations, comprising the extremely low-mass variable (ELMV) stars class. Despite it is generally believed that these stars are characterize
Externí odkaz:
http://arxiv.org/abs/1809.09242
ZZ Ceti stars are pulsating white dwarfs with a carbon-oxygen core (or possibly ONe for the most massive stars) build up during the core helium burning (CHeB) and thermally pulsing Asymptotic Giant Branch (TP-AGB) phases. Through the interpretation o
Externí odkaz:
http://arxiv.org/abs/1809.09150
Ultra-massive hydrogen-rich white dwarfs (WDs) stars are expected to harbor oxygen/neon cores resulting from semi-degenerate carbon burning when the progenitor star evolves through the super asymptotic giant branch (SAGB) phase. These stars are expec
Externí odkaz:
http://arxiv.org/abs/1809.09144
The Blue Large-Amplitude Pulsators (BLAPs) constitute a new class of pulsating stars. They are hot stars with effective temperatures of ~30 000 K and surface gravities of log g ~ 4.9, that pulsate with periods in the range 20-40 min. Until now, their
Externí odkaz:
http://arxiv.org/abs/1803.09600