Results 11 to 20 of about 11,159 (268)
A Spectroscopic Survey in the EUV of the “Coolest” Hot DA Stars [PDF]
International Astronomical Union Colloquium, 1996 We present an analysis of the extreme ultraviolet (EUV) spectroscopy of a sample of 10 DA white dwarfs observed by the Extreme Ultraviolet Explorer (EUVE). We have selected white dwarfs cooler than about 50,000 K and with presumably low heavy element abundances.
Jean Dupuis, Stéphane Vennes
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Asteroseismology of DA white dwarf stars [PDF]
Open Astronomy, 1998 Following the recent mode identification by Clemens suggesting the hydrogen layer mass of the DAV (ZZ Ceti) stars is nearly the same, I make the extreme assumption that models with a single composition profile with a hydrogen layer mass of 1.5 × 10−4M* may be able to fit the observed pulsation periods.
openaire +2 more sources
Gravity and limb-darkening coefficients for compact stars: DA, DB, and DBA eclipsing white dwarfs [PDF]
Astronomy & Astrophysics, 2020 Context. The distribution of the specific intensity over the stellar disk is an essential tool for modeling the light curves in eclipsing binaries, planetary transits, and stellar diameters through interferometric techniques, line profiles in rotating stars, gravitational microlensing, etc.
Claret, A. +5 more
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O consumo da experiência na ficção seriada televisiva: Gilmore Girls e a cidade de Stars Hollow
Lumina, 2017 Neste artigo, analisamos a importância da cidade de Stars Hollow na experiência de consumo da série televisiva Gilmore Girls a partir de duas premissas. A primeira é que a pequena cidade fictícia localizada no estado de Connecticut se configura como uma ...
Mayka Castellano, Melina Meimaridis
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"The Visit" (2021), de Chimamanda Ngozi Adichie: feminismo literário e ficção especulativa
Ilha do Desterro, 2023 Bastante difundido nos Estados Unidos, o termo “ficção especulativa” indica uma extensa produção literária na qual conjunturas, tempos e espaços alternativos têm sido imaginados, resultando em um corpus literário rico de significados.
Cláudio R. V. Braga
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Estimating Atmospheric Parameters of DA White Dwarf Stars with Deep Learning [PDF]
The Astronomical Journal, 2020 Abstract The determination of atmospheric parameters of white dwarf stars (WDs) is crucial for researches on them. Traditional methodology is to fit the model spectra to observed absorption lines and report the parameters with the lowest χ 2 error, which strongly relies on theoretical models that are not always publicly
Yong Yang +4 more
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Faint White Dwarf Flux Standards: Data and Models
The Astronomical JournalFainter standard stars are essential for the calibration of larger telescopes. This work adds to the calibration spectra (CALSPEC) database of 19 faint white dwarfs (WDs) with all-sky coverage and V magnitudes between 16.5 and 18.7.
Ralph C. Bohlin +9 more
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A GRAVITATIONAL REDSHIFT DETERMINATION OF THE MEAN MASS OF WHITE DWARFS. DA STARS [PDF]
The Astrophysical Journal, 2010 Accepted for publication in ApJ, 14 pages, 12 ...
Falcon, Ross E. +3 more
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Pediatric Blood &Cancer, EarlyView.ABSTRACT Pediatric gastroenteropancreatic neuroendocrine neoplasms (GEP‐NENs) are extremely rare and clinically heterogeneous. Management has largely been extrapolated from adult practice. This European Standard Clinical Practice Guideline (ESCP), developed by the EXPeRT network in collaboration with adult NEN experts, provides (adult) evidence ...
Michaela Kuhlen +23 more
wiley +1 more source
Odessa Astronomical Publications, 2017 We shortly present intermidiate results of a survey for weak magnetic fields among degenerate stars (white dwarfs and hot subdwarf stars). Kilogauss upper limits of longitudinal magnetic fields are presented for several brightest DA white dwarfs and new ...
G. Valyavin +6 more
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