Zobrazeno 1 - 10
of 54
pro vyhledávání: '"B. H. Dunlap"'
Publikováno v:
Frontiers in Astronomy and Space Sciences, Vol 9 (2022)
For isolated white dwarf (WD) stars, fits to their observed spectra provide the most precise estimates of their effective temperatures and surface gravities. Even so, recent studies have shown that systematic offsets exist between such spectroscopic
Externí odkaz:
https://doaj.org/article/e74afc611a44432bb742bb2e46b3674d
Autor:
Igor Bray, I. Hubeny, Taisuke Nagayama, Don Winget, T. A. Gomez, M. H. Montgomery, Patricia Cho, D. P. Kilcrease, Mark C. Zammit, B. H. Dunlap, Chris Fontes
Publikováno v:
Physical Review Letters. 127
Understanding how atoms interact with hot dense matter is essential for astrophysical and laboratory plasmas. Interactions in high-density plasmas broaden spectral lines, providing a rare window into interactions that govern, for example, radiation t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5a61933da1766b5988525ae6491b48d2
https://doi.org/10.1103/physrevlett.127.235001
https://doi.org/10.1103/physrevlett.127.235001
Autor:
P. B. Cho, T. A. Gomez, M. H. Montgomery, B. H. Dunlap, M. Fitz Axen, B. Hobbs, I. Hubeny, D. E. Winget
Publikováno v:
The Astrophysical Journal. 927:70
White dwarfs (WDs) are useful across a wide range of astrophysical contexts. The appropriate interpretation of their spectra relies on the accuracy of WD atmosphere models. One essential ingredient of atmosphere models is the theory used for the broa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2122484f0582835a7cf9ae10201f5595
https://doi.org/10.3847/1538-4357/ac4df3
https://doi.org/10.3847/1538-4357/ac4df3
Autor:
Kyle A. Corcoran, Joshua S. Reding, J. J. Hermes, J. W. Kuehne, Donald E Winget, Barbara G. Castanheira, Michael H. Montgomery, K. I. Winget, Joseph A. Guidry, Thomas M. Boudreaux, Brad N. Barlow, B. H. Dunlap, Tyler M. Heintz, Isaac D. Lopez, Zachary P. Vanderbosch, Keaton J. Bell
We present a novel method to detect variable astrophysical objects and transient phenomena using anomalous excess scatter in repeated measurements from public catalogs of Gaia DR2 and Zwicky Transient Facility (ZTF) DR3 photometry. We first provide a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::efe1f255876ec5417925abf9597c700a
http://arxiv.org/abs/2012.00035
http://arxiv.org/abs/2012.00035
Publikováno v:
Physics of Plasmas. 28:062902
White Dwarf (WD) stars are the most common stellar remnant in the universe. WDs usually have a hydrogen or helium atmosphere, and helium WD (called DB) spectra can be used to solve outstanding problems in stellar and galactic evolution. DB origins, w
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7d249da99f747052ababf263303f4a6c
https://doi.org/10.1063/5.0047931
https://doi.org/10.1063/5.0047931
Autor:
S. Coutu, B. H. Dunlap, Pierre Bergeron, P. Dufour, E. Loranger, Nicole F. Allard, Simon Blouin
Publikováno v:
The Astrophysical Journal
The Astrophysical Journal, American Astronomical Society, 2019, 885 (1), pp.74. ⟨10.3847/1538-4357/ab46b9⟩
The Astrophysical Journal, American Astronomical Society, 2019, 885 (1), pp.74. ⟨10.3847/1538-4357/ab46b9⟩
We present a homogeneous analysis of 1023 DBZ/DZ(A) and 319 DQ white dwarf stars taken from the Montreal White Dwarf Database. This represents a significant increase over the previous comprehensive studies on these types of objects. We use new trigon
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::42f172de744f4a902da4568834ae396e
https://hal.archives-ouvertes.fr/hal-03080869
https://hal.archives-ouvertes.fr/hal-03080869
Publikováno v:
High Energy Density Physics. 37:100853
We establish the work on white dwarf stars in the larger context of the experiments of the Wootton Center for Astrophysical Plasma Properties (WCAPP); these experiments are conducted at the plasma conditions found in the cosmos, without the need for
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::feb2909ebd60e9a6b6df6746635fbfc3
https://doi.org/10.1016/j.hedp.2020.100853
https://doi.org/10.1016/j.hedp.2020.100853
Autor:
P. E. Tremblay, Odette Toloza, J. J. Hermes, Michael H. Montgomery, Erik Dennihy, Don Winget, Zachary P. Vanderbosch, Paula Izquierdo, Keaton J. Bell, Boris T. Gänsicke, P. B. Cho, B. H. Dunlap
Publikováno v:
The Astrophysical Journal
We report the discovery of a white dwarf exhibiting deep, irregularly shaped transits, indicative of circumstellar planetary debris. Using Zwicky Transient Facility DR2 photometry of ZTF$\,$J013906.17+524536.89 and follow-up observations from the Las
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::aca0a90cbee159941858a44d8c83e6c9
https://doi.org/10.3847/1538-4357/ab9649
https://doi.org/10.3847/1538-4357/ab9649
Publikováno v:
The Astrophysical Journal. 890:11
The standard theory of pulsations deals with the frequencies and growth rates of infinitesimal perturbations in a stellar model. Modes which are calculated to be linearly driven should increase their amplitudes exponentially with time; the fact that
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9950811af3c641e4f6d3f3b471803384
https://doi.org/10.3847/1538-4357/ab6a0e
https://doi.org/10.3847/1538-4357/ab6a0e
Observations of heavy metal pollution in white dwarf stars indicate that metal-rich planetesimals are frequently scattered into star-grazing orbits, tidally disrupted, and accreted onto the white dwarf surface, offering direct insight into the dynami
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4b4a4d4dce44dc60eb5882f89f5591e8
http://arxiv.org/abs/1801.05443
http://arxiv.org/abs/1801.05443