Zobrazeno 1 - 10
of 16
pro vyhledávání: '"Leandro G. Althaus"'
Publikováno v:
The Astrophysical Journal, Vol 964, Iss 1, p 30 (2024)
Breathing pulses are mixing episodes that could develop during the core helium-burning phase of low- and intermediate-mass stars. The occurrence of breathing pulses is expected to bear consequences on the formation and evolution of white dwarfs, part
Externí odkaz:
https://doaj.org/article/1ed884d885cf420db94a127c192e5b8a
Autor:
Jianxing Chen, Francesco R. Ferraro, Maurizio Salaris, Mario Cadelano, Barbara Lanzoni, Cristina Pallanca, Leandro G. Althaus, Santi Cassisi
Publikováno v:
The Astrophysical Journal, Vol 950, Iss 2, p 155 (2023)
Recently, slowly cooling white dwarfs (WDs) are a new class of WD that have been identified in two globular clusters (namely M13 and NGC 6752), showing a horizontal branch (HB) morphology with an extended blue tail. The cooling rate of these WDs is r
Externí odkaz:
https://doaj.org/article/5f3cbc902b2745c7a8bdcded6687b99b
Autor:
Manuel Pichardo Marcano, Liliana E Rivera Sandoval, Thomas J Maccarone, Rene D Rohrmann, Craig O Heinke, Diogo Belloni, Leandro G Althaus, Arash Bahramian
We report a peculiar variable blue star in the globular cluster NGC 6397, using Hubble Space Telescope optical imaging. Its position in the colour-magnitude diagrams, and its spectrum, are consistent with this star being a helium core white dwarf (He
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::120d9aa20ba69dc1a4dfe76811bdffeb
Autor:
Mukremin Kilic, Alejandro H Córsico, Adam G Moss, Gracyn Jewett, Francisco C De Gerónimo, Leandro G Althaus
We present APO and Gemini time-series photometry of WD J004917.14$-$252556.81, an ultramassive DA white dwarf with $T_{\rm eff} = 13020$ K and $\log{g} = 9.34$. We detect variability at two significant frequencies, making J0049$-$2525 the most massiv
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::99599363fa32d0cd3177da4f142e0d44
Autor:
Maria E Camisassa, Roberto Raddi, Leandro G Althaus, Jordi Isern, Alberto Rebassa-Mansergas, Santiago Torres, Alejandro H Córsico, Lydia Korre
Ultra-massive white dwarfs (1.05M⊙≲MWD) are particularly interesting objects that allow us to study extreme astrophysical phenomena such as type Ia supernovae explosions and merger events. Traditionally, ultra-massive white dwarfs are thoug
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9265905d199713512f38ab8858c23be8
https://hdl.handle.net/2117/386067
https://hdl.handle.net/2117/386067
Autor:
Murat Uzundag, Alejandro H Córsico, S O Kepler, Leandro G Althaus, Klaus Werner, Nicole Reindl, Maja Vučković
We present two new GW Vir-type pulsating white dwarf stars, TIC\,0403800675 (WD\,J115727.68-280349.64) and TIC\,1989122424 (WD J211738.38-552801.18) discovered in the Transiting Exoplanet Survey Satellite (TESS) photometric data. For both stars, the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::940638d0cf291c1843bfc09666312857
http://arxiv.org/abs/2204.02501
http://arxiv.org/abs/2204.02501
Autor:
María E Camisassa, Leandro G Althaus, Detlev Koester, Santiago Torres, Pilar Gil Pons, Alejandro H Córsico
Publikováno v:
Digital.CSIC. Repositorio Institucional del CSIC
instname
instname
Ultra-massive white dwarfs ($\rm M_{WD} \gtrsim 1.05\, M_{\odot}$) are considered powerful tools to study type Ia supernovae explosions, merger events, the occurrence of physical processes in the Super Asymptotic Giant Branch (SAGB) phase, and the ex
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7a6671c14783b955470706f0122b12c1
https://hdl.handle.net/2117/386112
https://hdl.handle.net/2117/386112
Autor:
Leandro G. Althaus, María E. Camisassa, Santiago Torres, Tiara Battich, Alejandro H. Córsico, Alberto Rebassa-Mansergas, Roberto Raddi
[Context] Ultra-massive white dwarfs (M ABSTRACT 1.05 M) are of utmost importance in view of the role they play in type Ia supernovae explosions, merger events, the existence of high-magnetic-field white dwarfs, and the physical processes in the supe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c6c79afa8bce59345551671e6185991c
http://hdl.handle.net/10261/295859
http://hdl.handle.net/10261/295859
Autor:
Jianxing Chen, Francesco R. Ferraro, Mario Cadelano, Maurizio Salaris, Barbara Lanzoni, Cristina Pallanca, Leandro G. Althaus, Santi Cassisi, Emanuele Dalessandro
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:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7e89917ff9a7d3c6595b58b54232017a
Autor:
Isabel Renedo, Leandro G. Althaus, Alejandro H. Córsico, Alejandra D. Romero, Marcelo M. Miller Bertolami, René D. Rohrmann, Enrique García-Berro, Klaus Werner, T. Rauch
Publikováno v:
AIP Conference Proceedings.
We present fully evolutionary white dwarf cooling tracks for hydrogen‐rich DA white dwarfs. Our cooling sequences have been obtaind evolving white dwarf progenitors from the zero age main sequence, through the core hydrogen burning phase, the heliu