Zobrazeno 1 - 10
of 48
pro vyhledávání: '"Earl P Bellinger"'
Publikováno v:
The Astrophysical Journal Letters, Vol 967, Iss 2, p L39 (2024)
Despite major progress in our understanding of massive stars, concerning discrepancies still remain between observations and theory. Most notable are the numerous stars observed beyond the theoretical main sequence, an evolutionary phase expected to
Externí odkaz:
https://doaj.org/article/b78b7f77c2ea41c8b95232a09a400873
An Expanded Set of Los Alamos OPLIB Tables in MESA: Type-1 Rosseland-mean Opacities and Solar Models
Autor:
Ebraheem Farag, Christopher J. Fontes, F. X. Timmes, Earl P. Bellinger, Joyce A. Guzik, Evan B. Bauer, Suzannah R. Wood, Katie Mussack, Peter Hakel, James Colgan, David P. Kilcrease, Manolo E. Sherrill, Tryston C. Raecke, Morgan T. Chidester
Publikováno v:
The Astrophysical Journal, Vol 968, Iss 2, p 56 (2024)
We present a set of 1194 Type-1 Rosseland-mean opacity tables for four different metallicity mixtures. These new Los Alamos OPLIB atomic radiative opacity tables are an order of magnitude larger in number than any previous opacity table release, and
Externí odkaz:
https://doaj.org/article/97248622ae8a4820bdbfeeb1215edc19
Publikováno v:
The Astrophysical Journal, Vol 966, Iss 2, p 196 (2024)
The blue supergiant (BSG) problem, namely, the overabundance of BSGs inconsistent with classical stellar evolution theory, remains an open question in stellar astrophysics. Several theoretical explanations have been proposed, which may be tested by t
Externí odkaz:
https://doaj.org/article/bd8aa9cbbcc94935ba0384c376b8a7ac
Autor:
Lynn Buchele, Earl P. Bellinger, Saskia Hekker, Sarbani Basu, Warrick Ball, Jørgen Christensen-Dalsgaard
Publikováno v:
The Astrophysical Journal, Vol 961, Iss 2, p 198 (2024)
The theoretical oscillation frequencies of even the best asteroseismic models of solar-like oscillators show significant differences from observed oscillation frequencies. Structure inversions seek to use these frequency differences to infer the unde
Externí odkaz:
https://doaj.org/article/21810f9781b34960ba404bf0fd77d545
Autor:
Earl P. Bellinger, Matt E. Caplan, Taeho Ryu, Deepika Bollimpalli, Warrick H. Ball, Florian Kühnel, R. Farmer, S. E. de Mink, Jørgen Christensen-Dalsgaard
Publikováno v:
The Astrophysical Journal, Vol 959, Iss 2, p 113 (2023)
Hawking proposed that the Sun may harbor a primordial black hole (BH) whose accretion supplies some of the solar luminosity. Such an object would have formed within the first 1 s after the Big Bang with the mass of a moon or an asteroid. These light
Externí odkaz:
https://doaj.org/article/a421c3f39dcc4332b7c897950ddde847
Autor:
Adam S. Jermyn, Evan B. Bauer, Josiah Schwab, R. Farmer, Warrick H. Ball, Earl P. Bellinger, Aaron Dotter, Meridith Joyce, Pablo Marchant, Joey S. G. Mombarg, William M. Wolf, Tin Long Sunny Wong, Giulia C. Cinquegrana, Eoin Farrell, R. Smolec, Anne Thoul, Matteo Cantiello, Falk Herwig, Odette Toloza, Lars Bildsten, Richard H. D. Townsend, F. X. Timmes
Publikováno v:
The Astrophysical Journal Supplement Series, Vol 265, Iss 1, p 15 (2023)
We update the capabilities of the open-knowledge software instrument Modules for Experiments in Stellar Astrophysics ( MESA ). The new auto _ diff module implements automatic differentiation in MESA , an enabling capability that alleviates the need f
Externí odkaz:
https://doaj.org/article/8b2d350d4c7143ca9b52af8a82fb2d0e
Autor:
Mami Deka, Shashi M Kanbur, Sukanta Deb, Susmita Das, Kerdaris Kurbah, Earl P Bellinger, Anupam Bhardwaj
Publikováno v:
Deka, M, Kanbur, S M, Deb, S, Das, S, Kurbah, K, Bellinger, E P & Bhardwaj, A 2022, ' Period–colour and amplitude–colour relations for OGLE-δ Scuti stars in the Galactic bulge and LMC ', Monthly Notices of the Royal Astronomical Society, vol. 517, no. 2, pp. 2251-2263 . https://doi.org/10.1093/mnras/stac2457
We present an analysis on the behaviour of the Galactic bulge and the Large Magellanic Cloud (LMC) $\delta$ Scuti stars in terms of period-colour and amplitude-colour (PCAC) relations at maximum, mean and minimum light. The publicly available Optical
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ce9161a50e6933f6558f329c51c47210
https://doi.org/10.1093/mnras/stac2457
https://doi.org/10.1093/mnras/stac2457
We present two approaches to determine the dynamical stability of a hierarchical triple-star system. The first is an improvement on the Mardling-Aarseth stability formula from 2001, where we introduce a dependence on inner orbital eccentricity and im
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c5bf43c7b07f2b5039a1e1c973db8153
Rotationally-induced mode splitting frequencies of low-luminosity subgiants suggest that angular momentum transport mechanisms are 1-2 orders of magnitude more efficient in these stars than predicted by theory. Constraints on the rotation profile of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fc37818995e77ea2f05b4ea690c34012
http://arxiv.org/abs/2111.10953
http://arxiv.org/abs/2111.10953
Publikováno v:
Caplan, M E, Freeman, I F, Horowitz, C J, Cumming, A & Bellinger, E P 2021, ' Cooling Delays from Iron Sedimentation and Iron Inner Cores in White Dwarfs ', Astrophysical Journal Letters, vol. 919, no. 1, L12 . https://doi.org/10.3847/2041-8213/ac1f99
Do white dwarfs have inner cores made of iron? Neutron rich nuclei like $^{56}$Fe experience a net gravitational force and sediment toward the core. Using new phase diagrams and molecular dynamics simulations, we show that $^{56}$Fe should separate i
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::176113e12367bd506ed34662e3013207
http://arxiv.org/abs/2108.11389
http://arxiv.org/abs/2108.11389