Zobrazeno 1 - 10
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pro vyhledávání: '"Blouin P"'
Infrared-faint white dwarfs are cool white dwarfs exhibiting significant infrared flux deficits, most often attributed to collision-induced absorption (CIA) from H$_2$-He in mixed hydrogen-helium atmospheres. We present James Webb Space Telescope (JW
Externí odkaz:
http://arxiv.org/abs/2409.16224
Publikováno v:
Nature 627, 286-288 (2024)
White dwarfs are stellar remnants devoid of a nuclear energy source, gradually cooling over billions of years and eventually freezing into a solid state from the inside out. Recently, it was discovered that a population of freezing white dwarfs maint
Externí odkaz:
http://arxiv.org/abs/2409.04419
Autor:
Blouin, Simon
This chapter provides an in-depth overview of white dwarfs, the evolutionary terminus of the vast majority of stars. It discusses their discovery, their nature as degenerate objects, their connections to earlier phases of stellar evolution, their sub
Externí odkaz:
http://arxiv.org/abs/2409.03941
Autor:
Limbach, Mary Anne, Vanderburg, Andrew, Venner, Alexander, Blouin, Simon, Stevenson, Kevin B., MacDonald, Ryan J., Jenkins, Sydney, Bowens-Rubin, Rachel, Soares-Furtado, Melinda, Morley, Caroline, Janson, Markus, Debes, John, Xu, Siyi, Kleisioti, Evangelia, Kenworthy, Matthew, Butler, Paul, Crane, Jeffrey D., Osip, Dave, Shectman, Stephen, Teske, Johanna
The MIRI Exoplanets Orbiting White dwarfs (MEOW) Survey is a cycle 2 JWST program to search for exoplanets around dozens of nearby white dwarfs via infrared excess and direct imaging. In this paper, we present the detection of mid-infrared excess at
Externí odkaz:
http://arxiv.org/abs/2408.16813
Autor:
Barrientos, Manuel, Kilic, Mukremin, Bergeron, Pierre, Blouin, Simon, Brown, Warren R., Andrews, Jeff J.
We present follow-up spectroscopy and a detailed model atmosphere analysis of 29 wide double white dwarfs, including eight systems with a crystallized C/O core member. We use state-of-the-art evolutionary models to constrain the physical parameters o
Externí odkaz:
http://arxiv.org/abs/2407.18763
Autor:
Jewett, Gracyn, Kilic, Mukremin, Bergeron, Pierre, Moss, Adam, Blouin, Simon, Brown, Warren R., Kosakowski, Alekzander, Toonen, Silvia, Agüeros, Marcel A.
We present a detailed model atmosphere analysis of massive white dwarfs with $M > 0.9~M_\odot$ and $T_{\rm eff}\geq11,000$ K in the Montreal White Dwarf Database 100 pc sample and the Pan-STARRS footprint. We obtained follow-up optical spectroscopy o
Externí odkaz:
http://arxiv.org/abs/2407.04827
Autor:
Jenkins, Sydney, Vanderburg, Andrew, Bieryla, Allyson, Latham, David W., Badenas-Agusti, Mariona, Berlind, Perry, Blouin, Simon, Buchhave, Lars A., Calkins, Michael L., Esquerdo, Gilbert A., Viaña, Javier
Over a quarter of white dwarfs have photospheric metal pollution, which is evidence for recent accretion of exoplanetary material. While a wide range of mechanisms have been proposed to account for this pollution, there are currently few observationa
Externí odkaz:
http://arxiv.org/abs/2406.18638
White dwarf planetary systems provide a unique way to measure the bulk composition of exoplanetary material. Extrasolar asteroids/comets/moons which have survived the evolution of their host star can end up in the atmosphere of the white dwarf. Aster
Externí odkaz:
http://arxiv.org/abs/2404.15425
Autor:
Mardan, Amir, Blouin, Martin, Fabien-Ouellet, Gabriel, Bernard-Giroux, Vergniault, Christophe, Gendreau, Jeremy
First-break picking is an essential step in seismic data processing. First arrivals should be picked by an expert. This is a time-consuming procedure and subjective to a certain degree, leading to different results for different operators. In this st
Externí odkaz:
http://arxiv.org/abs/2404.07400
Autor:
Kilic, Mukremin, Bergeron, Pierre, Blouin, Simon, Jewett, Gracyn, Brown, Warren R., Moss, Adam
Four years after the discovery of a unique DAQ white dwarf with a hydrogen-dominated and carbon-rich atmosphere, we report the discovery of four new DAQ white dwarfs, including two that were not recognized properly in the literature. We find all five
Externí odkaz:
http://arxiv.org/abs/2403.08878