Results 61 to 70 of about 2,510 (308)
Spectral Analyses of DO White Dwarfs and PG1159 Stars from the Sloan Digital Sky Survey [PDF]
, 2005 S. D. Huegelmeyer +5 more
openalex +3 more sources
White dwarf pollution: one star or two?
Monthly Notices of the Royal Astronomical SocietyABSTRACT The accretion of tidally disrupted planetary bodies is the current consensus model for the presence of photospheric metals commonly detected in white dwarfs. While most dynamical studies have considered a single star and associated planetary instabilities, several investigations have instead considered the influence of widely ...
Hiba Tu Noor +3 more
openaire +4 more sources
Astronomische Nachrichten, EarlyView.ABSTRACT Isochrones, equal‐age curves, are widely used in astrophysics to estimate stellar ages. Classical stellar parameters are, however, very limited in their usability for main sequence stars because of their weak age‐dependence. Here, rotation period measurements provide complementary information.
David Gruner, Sydney A. Barnes
wiley +1 more source
Confirmation of a Non‐Transiting Planet in the Habitable Zone of the Nearby M Dwarf L 98‐59
Astronomische Nachrichten, EarlyView.ABSTRACT Only 40 exoplanetary systems with five or more planets are currently known. These systems are crucial for our understanding of planet formation and planet‐planet interaction. The M dwarf L 98‐59 has previously been found to show evidence of five planets, three of which are transiting.
Paul I. Schwarz +2 more
wiley +1 more source
How Sublimation Delays the Onset of Dusty Debris Disk Formation Around White Dwarf Stars. [PDF]
Astrophys J Lett, 2021 Steckloff JK +6 more
europepmc +1 more source
Autism Research, EarlyView.ABSTRACT Autism and borderline personality disorder (BPD) are each associated with increased psychiatric emergency department (PsyED) use, yet the service impact of coexisting autism–BPD remains unclear. We conducted a retrospective chart review of 1027 PsyED visits by 345 autistic adults (2018–2020) at an urban Canadian psychiatric hospital to compare
Ching‐Hua Julie Lee +15 more
wiley +1 more source
GD1212: Probing deep into the interior of a pulsating white dwarf star
EPJ Web of Conferences, 2015 We present the first self-consistent seismic analysis of a white dwarf star, GD 1212, in the Kepler2 field. We precisely establish the fundamental parameters of the star using the forward method based on physically sound models.
Giammichele N. +4 more
doaj +1 more source
Indonesian inquiry: A narrative of biocultural teaching on Sulawesi Utara
British Educational Research Journal, EarlyView.Abstract Using phenomenology, narrative inquiry and autoethnographic approaches, this study analyses a program of faculty development conducted alongside the delivery of an international field school. Through this study, we explore the value and benefits of inter‐cultural field programming and how these might serve to complement or to redress ...
David Zandvliet, Wiske Rotinsulu
wiley +1 more source
The DB gap and a new class of pulsating white dwarfs
EPJ Web of Conferences, 2013 The recent systematic surveys providing enormously massive datasets of white dwarfs show that there is still a deficit of a factor of 2.5 in the DA/non-DA ratio within the temperature range of 30 000 K < Teff < 45 000 K, which has been regarded as the ...
Shibahashi H.
doaj +1 more source
Asteroseismology of white dwarf stars [PDF]
Highlights of Astronomy, 1995 Perhaps the hardest scientific problems to solve are those most scientists believe have already been solved, but which have not. Any model we make of an astronomical process is doomed to be incomplete at some level; the “broad-brush” picture of stellar structure and evolution is often accepted as a solved problem, but in fact many discrepancies exist ...
openaire +1 more source