Results 121 to 130 of about 114,517 (388)

Essential work, invisible workers: The role of digital curation in COVID‐19 Open Science

Journal of the Association for Information Science and Technology, Volume 76, Issue 4, Page 703-717, April 2025.
Abstract In this paper, we examine the role digital curation practices and practitioners played in facilitating open science (OS) initiatives amid the COVID‐19 pandemic. In Summer 2023, we conducted a content analysis of available information regarding 50 OS initiatives that emerged—or substantially shifted their focus—between 2020 and 2022 to address ...
Irene V. Pasquetto, Amina A. Abdu, Natascha Chtena   +2 more
wiley   +1 more source

The Impact of Breathing Pulses during Core Helium Burning on the Core Chemical Structure and Pulsations of Hydrogen-rich Atmosphere White Dwarfs

The Astrophysical Journal
Breathing pulses are mixing episodes that could develop during the core helium-burning phase of low- and intermediate-mass stars. The occurrence of breathing pulses is expected to bear consequences on the formation and evolution of white dwarfs ...
Alejandro H. Córsico, Leandro G. Althaus   +1 more
doaj   +1 more source

Pulsating white dwarf stars and asteroseismology [PDF]

, 2016
At present, a large number of pulsating white dwarf (WD) stars is being discovered either from Earth-based surveys such as the Sloan Digital Sky Survey, or through observations from space (e.g., the Kepler mission).
Córsico, Alejandro H.
core   +1 more source

Si:P as a laboratory analogue for hydrogen on high magnetic field white dwarf stars

Nature Communications, 2013
Laboratory spectroscopy of atomic hydrogen in a magnetic flux density of 105 T (1 gigagauss), the maximum observed on high-field magnetic white dwarfs, is impossible because practically available fields are about a thousand times less.
B. Murdin, Juerong Li, M. Pang, E. Bowyer, K. Litvinenko, S. Clowes, H. Engelkamp, C. Pidgeon, I. Galbraith, N. Abrosimov, H. Riemann, S. Pavlov, H. Hübers, P. Murdin   +13 more
semanticscholar   +1 more source

New Arabic Records From Cairo on Supernovae 1181 and 1006

Astronomische Nachrichten, EarlyView.
ABSTRACT The remnant of the historical supernova SN 1181 is under discussion: While the previously suggested G130.7+3.1 (3C58) appears too old (3000–5000 year), the unusual star IRAS00500+6713 with a surrounding nebula (Pa‐30) has an expansion age not inconsistent with a SN Iax explosion in ad 1181 under the assumption that neither acceleration nor ...
J. G. Fischer, H. Halm, R. Neuhäuser, D. L. Neuhäuser   +3 more
wiley   +1 more source

Accretion in dipole magnetic fields: flow structure and X-ray emission of accreting white dwarfs

, 2005
Field-channelled accretion flows occur in a variety of astrophysical objects, including T Tauri stars,magnetic cataclysmic variables and X-ray pulsars.
Aizu, Anders, Anzer, Arons, Basri, Beuermann, C. J. Saxton, Calvet, Chanmugam, Chevalier, Cropper, Cropper, Elsner, G. Ramsay, Ghosh, Gullbring, Hartman, Imamura, J. B. G. Canalle, K. Wu, Koldoba, Kryukov, Königl, Lamzin, Lamzin, Langer, Li, Li, Lovelace, M. Cropper, Martin, Mewe, Nauenberg, Phillips, Romanova, Saxton, Saxton, Schwope, Spruit, Stelzer, Toropina, Wada, Wu, Wu, Wu, Wu   +45 more
core   +1 more source

JWST Imaging of the Closest Globular Clusters—VI. The Lowest‐Mass Objects in M 4 and the Galactic Bulge

Astronomische Nachrichten, EarlyView.
ABSTRACT We present James Webb Space Telescope observations of M 4—the closest globular cluster—that probe the lower Main Sequence down to the hydrogen‐burning limit. The unveiled stellar sequence reaches much fainter luminosities than previously possible, revealing a few extremely red objects that are consistent with brown dwarfs as cool as Teff∼1000K$
L. R. Bedin, R. Gerasimov, A. Calamida, M. Libralato, M. Scalco, D. Nardiello, M. Griggio, D. Apai, J. Anderson, A. Bellini, A. Burgasser   +10 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., Fontaine G., Charpinet S., Brassard P., Greiss S.   +4 more
doaj   +1 more source

How Sublimation Delays the Onset of Dusty Debris Disk Formation Around White Dwarf Stars. [PDF]

Astrophys J Lett, 2021
Steckloff JK, Debes J, Steele A, Johnson B, Adams ER, Jacobson SA, Springmann A.   +6 more
europepmc   +1 more source

Discovery of a luminous white dwarf in a young star cluster in the Large Magellanic Cloud

, 1998
We have identified a candidate 1-2 x 10^5 year old luminous white dwarf in NGC 1818, a young star cluster in the Large Magellanic Cloud. This discovery strongly constrains the boundary mass M_c at which stars stop forming neutron stars and start forming ...
Boyle B. J., Colless M., Gerard F. Gilmore, Jarrod Hurley, Jeffries R. D., Koester D., Melvyn B. Davies, Rebecca A. W. Elson, Santiago B., Schaller G., Steinn Sigurdsson, van den Bergh S., Will   +12 more
core   +1 more source