Zobrazeno 1 - 10
of 244
pro vyhledávání: '"G. Vauclair"'
Publikováno v:
SEDICI (UNLP)
Universidad Nacional de La Plata
instacron:UNLP
Universidad Nacional de La Plata
instacron:UNLP
The accretion of heavy material from debris disk on the surface of hydrogen-rich white dwarfs induces a double diffusivity instability known as the fingering convection. It leads to an efficient extra mixing which brings the accreted material deeper
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::90745f05058797274ed01fb218297b16
http://sedici.unlp.edu.ar/handle/10915/123832
http://sedici.unlp.edu.ar/handle/10915/123832
Autor:
C. Li, Hubiao Niu, N. Dolez, L. Fox Machado, Jian-Ning Fu, Hui-Fang Xue, Yan Li, G. Vauclair, S. L. Kim, Ali Esamdin, Jie Su, Raul Michel, Lu Ma, M. Alvarez, Jinzhong Liu, T. Q. Cang, François Colas, Xiao-Jun Jiang
Publikováno v:
Monthly Notices of the Royal Astronomical Society
Monthly Notices of the Royal Astronomical Society, 2019, 486, pp.3560-3568. ⟨10.1093/mnras/stz1088⟩
Monthly Notices of the Royal Astronomical Society, 2019, 486, pp.3560-3568. ⟨10.1093/mnras/stz1088⟩
An increasing number of white dwarf stars show atmospheric chemical composition polluted by heavy elements accreted from debris disk material. The existence of such debris disks strongly suggests the presence of one or more planet(s) whose gravitatio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0b32abdc83baaba6c91bd377aac8b4df
http://arxiv.org/abs/1904.07586
http://arxiv.org/abs/1904.07586
Autor:
Jian-Ning Fu, Raul Michel, L. Fox-Machado, Emanuele Bertone, Miguel Chavez, Chunhui Li, G. Vauclair, N. Dolez
Asteroseismology is a unique tool to explore the internal structure of stars through both observational and theoretical research. The internal structure of pulsating hydrogen shell white dwarfs (ZZ Ceti stars) detected by asteroseismology is regarded
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::59978ecb723ab421f3ff14d9d4d7a614
http://arxiv.org/abs/1709.09206
http://arxiv.org/abs/1709.09206
Publikováno v:
CONICET Digital (CONICET)
Consejo Nacional de Investigaciones Científicas y Técnicas
instacron:CONICET
Astronomy and Astrophysics-A&A
Astronomy and Astrophysics-A&A, 2017, 601, ⟨10.1051/0004-6361/201630094⟩
SEDICI (UNLP)
Universidad Nacional de La Plata
instacron:UNLP
Consejo Nacional de Investigaciones Científicas y Técnicas
instacron:CONICET
Astronomy and Astrophysics-A&A
Astronomy and Astrophysics-A&A, 2017, 601, ⟨10.1051/0004-6361/201630094⟩
SEDICI (UNLP)
Universidad Nacional de La Plata
instacron:UNLP
Context. A large fraction of white dwarfs show photospheric chemical composition that is polluted by heavy elements accreted from a debris disk. Such debris disks result from the tidal disruption of rocky planetesimals that have survived to whole ste
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::78df0d40c6444eefc780e416cf03806e
https://www.aanda.org/articles/aa/abs/2017/05/aa30094-16/aa30094-16.html
https://www.aanda.org/articles/aa/abs/2017/05/aa30094-16/aa30094-16.html
Publikováno v:
Astronomy and Astrophysics-A&A
Astronomy and Astrophysics-A&A, EDP Sciences, 2017, 601, pp.A127. ⟨10.1051/0004-6361/201629825⟩
Astronomy and Astrophysics-A&A, 2017, 601, pp.A127. ⟨10.1051/0004-6361/201629825⟩
Astronomy and Astrophysics-A&A, EDP Sciences, 2017, 601, pp.A127. ⟨10.1051/0004-6361/201629825⟩
Astronomy and Astrophysics-A&A, 2017, 601, pp.A127. ⟨10.1051/0004-6361/201629825⟩
A precision of order one percent is needed on the parameters of exoplanet-hosts stars in order to correctly characterize the planets themselves. This will be achieved by asteroseismology. It is important in this context to test the influence on the d
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a92484c04baf25f7bf63e194835a41fb
https://hal.archives-ouvertes.fr/hal-01857892/file/aa29825-16.pdf
https://hal.archives-ouvertes.fr/hal-01857892/file/aa29825-16.pdf
Publikováno v:
EPJ Web of Conferences, Vol 152, p 05006 (2017)
GD 133 is a DAZ white dwarf with an atmosphere polluted by heavy elements accreted from a debris disk, which is formed by the disruption of rocky planetesimals with orbits bringing them at the white dwarf tidal radius. To reach such orbits implies th
Publikováno v:
EAS Publications Series. 63:297-302
Heavy elements are observed in the atmospheres of many DA and DB white dwarfs, and their presence is attributed to the accretion of matter coming from debris disks. Several authors have deduced accretion rates from the observed abundances, taking int
Autor:
G. Vauclair
Publikováno v:
EAS Publications Series. 63:175-183
In the last two decades, considerable efforts have been devoted to the study of white dwarfs pulsators. Owing to ground-based multi-sites observational campaigns, and more recently to the long time-based high-precision photometric observations with t
Autor:
Carl J. Hansen, Judith L. Provencal, D. A. H. Buckley, Waldemar Ogloza, Michael D. Reed, M. M. Brewer, Hari Om Vats, Mary E. Oksala, Jian-Ning Fu, R. E. Nather, Denis J. Sullivan, Luciano Fraga, Ramotholo Sefako, Ivan Bruni, J. E. S. Costa, Matt A. Wood, Wen Ping Chen, W. Strickland, Fergal Mullally, Roberto Silvotti, B. N. Ashoka, B. Walter, Timothy M. Brown, S. Hemar, R. Rosen, E. G. Meištas, P. Henrique, M. Andreev, X. Zhang, T. K. Watson, Kiran S. Baliyan, P. Ibbetson, Chuck Claver, Rimvydas Janulis, Harry L. Shipman, Michael H. Montgomery, Gerald Handler, J. C. Clemens, Antonio Kanaan, M. Chevreton, J. Dalessio, J.-E. Solheim, Thorsten Nagel, S. L. Kim, B. Pfeiffer, A. V. Chernyshev, Susan E. Thompson, Martin A. Barstow, S. Seetha, M. Redaelli, Donald E Winget, Atsuko Nitta, T. M. K. Marar, G. Vauclair, Michal Siwak, M. Yang, Xiao-Jun Jiang, Orlagh Creevey, Pawel Moskalik, Elia M. Leibowitz, A. V. Sergeev, J. R. Fremy, G. Pajdosz, M. Winiarski, S. J. Kleinman, D. Chandler, Andrzej S. Baran, Souza Oliveira Kepler, B. G. Castanheira, Chia-You Shih, Staszek Zola, O. Giovannini, D. Childers, Agnès Bischoff-Kim, Zs. Bognár, Donal O'Donoghue, N. Dolez, Steven D. Kawaler
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 415:1220-1227
PG 1351+489 is one of the 20 DBVs ― pulsating helium-atmosphere white dwarf stars ― known and has the simplest power spectrum for this class of star, making it a good candidate to study cooling rates. We report accurate period determinations for
Autor:
Chris Cameron, Ömür Çakırlı, R. Avila, G. Stachowski, C. Akan, Y. M. Lipkin, S. L. Harms, Z. Csubry, Jaymie M. Matthews, M. Vuckovic, D. W. Winget, S. McDaniel, D. Zsuffa, Róbert Szabó, J. Bodnarik, R. Janulis, J. L. Provencal, M. Paparó, X.-J. Jian, M. Chevreton, Roy Ostensen, R. Pretorius, Michael D. Reed, J.-P. Gou, Fergal Mullally, Hong Wu, Reed Riddle, W. Ogloza, B. Berkey, H.-C. Lin, Wen Ping Chen, Philippe M. Binder, Pawel Moskalik, A. F. M. Costa, J.-E. Solheim, G. Vauclair, Roberto Silvotti, Ivan Bruni, R. Crowe, Kazuhiro Sekiguchi, S. G. Stewart, D. Terry, E. M. Leibowitz, C.-W. Chen, A. C. Quint, Zong-Li Liu, M. A. Morris, S. L. Kim, D. J. Sullivan, J. R. Eggen, S. Marinoni, S. Poindexter, Andrzej S. Baran, H. Pablo, D. W. Kurtz, Stanisław Zoła, N. Dolez, Steven D. Kawaler, Souza Oliveira Kepler, A.-Y. Zhou, D. Bolton
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 412:371-390
KPD 1930+2752 is a short-period pulsating subdwarf B (sdB) star. It is also an ellipsoidal variable with a known binary period just over two hours. The companion is most likely a white dwarf and the total mass of the system is close to the Chandresak