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pro vyhledávání: '"Feige P"'
For the precise spectral analysis of hot stars, advanced stellar-atmosphere models that consider deviations from the local thermodynamic equilibrium are mandatory. This requires accurate atomic data to calculate all transition rates and occupation nu
Externí odkaz:
http://arxiv.org/abs/2406.13307
Akademický článek
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A remarkable conjecture of Feige (2006) asserts that for any collection of $n$ independent non-negative random variables $X_1, X_2, \dots, X_n$, each with expectation at most $1$, $$ \mathbb{P}(X < \mathbb{E}[X] + 1) \geq \frac{1}{e}, $$ where $X = \
Externí odkaz:
http://arxiv.org/abs/2208.12702
Autor:
Molina, Francisco, Vos, Joris, Németh, Péter, Østensen, Roy, Vučković, Maja, Tkachenko, Andrew, van Winckel, Hans
Publikováno v:
A&A 658, A122 (2022)
There are 23 long-period binary systems discovered to date that contain a B-type hot subdwarf(sdB) whose orbital parameters have been fully solved. They evolve into O-type subdwarfs (sdO) once the helium burning transitions from the core to the He sh
Externí odkaz:
http://arxiv.org/abs/2110.14339
Akademický článek
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Publikováno v:
A&A 643, A22 (2020)
Hot subdwarf stars of types O and B represent a poorly understood phase in the evolution of low-mass stars. Many subdwarfs show rich oscillations and are among the most chemically peculiar stars known. Two intermediate He-rich hot subdwarf stars, LS
Externí odkaz:
http://arxiv.org/abs/2009.09032
Publikováno v:
A&A 629, A148 (2019)
The intermediate He-enriched hot subdwarf star Feige 46 was recently reported as the second member of the V366 Aqr (or He-sdOBV) pulsating class. Feige 46 is very similar to the prototype of the class, LS IV$-$14116, not only in terms of pulsational
Externí odkaz:
http://arxiv.org/abs/1908.04587
Publikováno v:
A&A 626, A29 (2019)
We report on results obtained with the XMM-Newton observation of Feige 34 carried out in April 2018. This is the first spectroscopic X-ray observation of a compact and helium-poor hot subdwarf star. The source was detected at a flux level $f_{\rm X}$
Externí odkaz:
http://arxiv.org/abs/1905.00682
Autor:
Nemeth, Peter
We have revisited the ultraviolet and optical spectra of the blue horizontal branch star Feige 86. The new analysis finds the star cooler and more compact than previously determined. The IUE spectrum of Feige 86 holds numerous unidentified spectral l
Externí odkaz:
http://arxiv.org/abs/1712.03368
Autor:
Paulin, Roland
Let $\mu_1 \ge \dotsc \ge \mu_n > 0$ and $\mu_1 + \dotsm + \mu_n = 1$. Let $X_1, \dotsc, X_n$ be independent non-negative random variables with $EX_1 = \dotsc = EX_n = 1$, and let $Z = \sum_{i=1}^n \mu_i X_i$. Let $M = \max_{1 \le i \le n} \mu_i = \m
Externí odkaz:
http://arxiv.org/abs/1703.05152