Results 151 to 160 of about 2,034,344 (399)

PERICLES: A Set of Empirical Rotational Isochrones Modeled on Cool Dwarfs in Open Clusters and Wide Binaries

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

Weighing The Options: The Unseen Companion in LAMOST J2354 is Likely a Massive White Dwarf

The Open Journal of Astrophysics
LAMOST J235456.73+335625 (J2354) is a binary system hosting a $\sim 0.7~\rm M_\odot$ K dwarf and a $\sim 1.4~\rm M_\odot$ dark companion, supposedly a neutron star, in a 0.48d orbit.
Michael A Tucker, Adam J. Wheeler, Dominick M. Rowan, Mark E. Huber   +3 more
doaj   +1 more source

Cones structure and seed traits of four species of large‐seeded pines: Adaptation to animal‐mediated dispersal

Ecology and Evolution, 2020
Seed dispersal selection pressures may cause morphological differences in cone structure and seed traits of large‐seeded pine trees. We investigated the cone, seed, and scale traits of four species of animal‐dispersed pine trees to explore the ...
Man‐Yu Zhang, Chang‐Xiang Su, Chang‐Hu Lu   +2 more
doaj   +1 more source

I Spy Transits and Pulsations: Empirical Variability in White Dwarfs Using Gaia and the Zwicky Transient Facility [PDF]

, 2021
Joseph A. Guidry, Zachary P Vanderbosch, J. J. Hermes, Brad N. Barlow, Isaac D. Lopez, Thomas M. Boudreaux, Kyle A. Corcoran, Keaton J. Bell, M.H. Montgomery, Tyler M. Heintz, Barbara G. Castanheira, Joshua S. Reding, Bart H. Dunlap, D.E. Winget, Karen I. Winget, J. W. Kuehne   +15 more
openalex   +1 more source

White Dwarf Cooling Curves and Searches For White Dwarfs [PDF]

Highlights of Astronomy, 1998
White dwarf (WD) evolution is essentially a cooling problem in two parts. Degenerate electrons in the core provide the support while non-degenerate C and O ions provide the thermal reservoir (Koester & Chanmugam 1990, Kawaler 1996). The rate of energy loss through the non-degenerate envelope of H and He—segregated by gravitational settling—is ...
openaire   +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, Stefan Dreizler, René Heller   +2 more
wiley   +1 more source

Psychiatric Emergency Visits of Autistic Adults With or Without Documented Borderline Personality Disorder

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, Louisa Lok Yee Man, Alexandra Morra, Carleigh Pace‐Tonna, Chantelle Castelino, Valerie Courchesne, Margot Frayne, Vanessa Luk, Paria Baharikhoob, Patrick Jachyra, Juveria Zaheer, Stephanie H. Ameis, Hsiang‐Yuan Lin, Amanda Sawyer, Yona Lunsky, Meng‐Chuan Lai   +15 more
wiley   +1 more source

A helium-burning white dwarf binary as a supersoft X-ray source. [PDF]

Nature, 2023
Greiner J, Maitra C, Haberl F, Willer R, Burgess JM, Langer N, Bodensteiner J, Buckley DAH, Monageng IM, Udalski A, Ritter H, Werner K, Maggi P, Jayaraman R, Vanderspek R.   +14 more
europepmc   +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

Photometric White Dwarf Rotation

The Astrophysical Journal
We present a census of photometrically detected rotation periods for white dwarf (WD) stars. We analyzed the light curves of 9285 WD stars observed by the Transiting Exoplanet Survey Satellite up to Sector 69.
Gabriela Oliveira da Rosa, S. O. Kepler, L. T. T. Soethe, Alejandra D. Romero, Keaton J. Bell   +4 more
doaj   +1 more source