Zobrazeno 1 - 10
of 105
pro vyhledávání: '"Fontaine, Gilles"'
Autor:
Tremblay, Pier-Emmanuel, Fontaine, Gilles, Fusillo, Nicola Pietro Gentile, Dunlap, Bart H., Gänsicke, Boris T., Hollands, Mark A., Hermes, J. J., Marsh, Thomas R., Cukanovaite, Elena, Cunningham, Tim
Publikováno v:
Nature, Volume 565, Issue 7738, 2019, p. 202-205
White dwarfs are stellar embers depleted of nuclear energy sources that cool over billions of years. These stars, which are supported by electron degeneracy pressure, reach densities of 1e7 grams per cubic centimetre in their cores. It has been predi
Externí odkaz:
http://arxiv.org/abs/1908.00370
Autor:
Fernandes, Catarina S., Van Grootel, Valerie, Salmon, Sebastien J. A. J., Aringer, Bernhard, Burgasser, Adam J., Scuflaire, Richard, Brassard, Pierre, Fontaine, Gilles
Ultracool dwarfs have emerged as key targets for searches of transiting exoplanets. Precise estimates of the host parameters (including mass, age, and radius) are fundamental to constrain the physical properties of orbiting exoplanets. We have extend
Externí odkaz:
http://arxiv.org/abs/1906.05626
Autor:
Van Grootel, Valerie, Randall, Suzanna K., Latour, Marilyn, Németh, Peter, Fontaine, Gilles, Brassard, Pierre, Charpinet, Stephane, Green, Elizabeth M.
Pulsating hot B subdwarf (sdB) stars, which are core-He burning objects, are one of the showcases of asteroseismology. Thanks to the combination of rich pulsation spectra and state-of-the-art modeling tools it is possible to tightly constrain fundame
Externí odkaz:
http://arxiv.org/abs/1905.00654
We use Gaia DR2 kinematic data and white dwarf evolutionary models to determine that the young and ultramassive white dwarf GD 50 is a likely member of the AB Doradus moving group. Comparison with the Montr\'eal white dwarf evolutionary models and th
Externí odkaz:
http://arxiv.org/abs/1806.07512
In this research note we identify 130 new M-type candidate members of young associations with the BANYAN $\Sigma$ tool and recently published trigonometric distances from RECONS and URAT-South. We identify a white dwarf candidate in the AB Doradus mo
Externí odkaz:
http://arxiv.org/abs/1804.05248
We present a detailed spectroscopic analysis of 115 helium-line (DB) and 28 cool, He-rich hydrogen-line (DA) white dwarfs based on atmosphere fits to optical spectroscopy and photometry. We find that 63% of our DB population show hydrogen lines, maki
Externí odkaz:
http://arxiv.org/abs/1803.05965
We present a detailed spectroscopic and photometric analysis of 219 DA and DB white dwarfs for which trigonometric parallax measurements are available. Our aim is to compare the physical parameters derived from the spectroscopic and photometric techn
Externí odkaz:
http://arxiv.org/abs/1709.02324
We present an analysis of the evolutionary and pulsation properties of the extremely low-mass white dwarf precursor (B) component of the double-lined eclipsing system WASP 0247-25. Given that the fundamental parameters of that star have been obtained
Externí odkaz:
http://arxiv.org/abs/1708.09388
Autor:
Latour, Marilyn, Randall, Suzanna K., Fontaine, Gilles, Bono, Giuseppe, Calamida, Annalisa, Brassard, Pierre
Taking advantage of a recent FORS2/VLT spectroscopic sample of Extreme Horizontal Branch (EHB) stars in $\omega$ Cen, we isolate 38 spectra well suited for detailed atmospheric studies and determine their fundamental parameters ($T_{\rm eff}$, log $g
Externí odkaz:
http://arxiv.org/abs/1409.4042
The Procyon AB binary system (orbital period 40.838 years, a newly-refined determination), is near and bright enough that the component radii, effective temperatures, and luminosities are very well determined, although more than one possible solution
Externí odkaz:
http://arxiv.org/abs/1305.0587