Results 121 to 130 of about 116,162 (381)

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

White dwarf pollution: one star or two?

Monthly Notices of the Royal Astronomical Society
ABSTRACT 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, Jay Farihi, Mark Hollands, Silvia Toonen   +3 more
openaire   +4 more sources

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

The impact of urbanisation on social behaviour: a comprehensive review

Biological Reviews, EarlyView.
ABSTRACT Urbanisation is a key driver of global environmental change and presents animals with novel stressors and challenges. It can fundamentally influence social behaviour and has the potential to reshape within‐ and between‐species social interactions. Given the role of social behaviour in reproductive fitness and survival, understanding how social
Avery L. Maune, Barbara A. Caspers, Isabel Damas‐Moreira   +2 more
wiley   +1 more source

A review of the historic and present ecological role of aquatic and shoreline wood, from forest to deep sea

Biological Reviews, EarlyView.
ABSTRACT The ecology of forests, their losses, and terrestrial wood decomposition dynamics have been intensively studied and reviewed. In the aquatic realm, reviews have concentrated on large wood (LW) in rivers and the transition from freshwater to marine environments in the Pacific Northwest of North America. However, a comprehensive global synthesis
Jon Dickson, Ellen Wohl, Laura L. Govers, Oscar Franken, Tjeerd J. Bouma, Han Olff, Britas Klemens Eriksson, Maryann S. Watson, Luísa M.S. Borges, Tjisse van der Heide   +9 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

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

Nature at Risk, Finance at Stake: A Systematic Literature Review of Biodiversity Risk in Finance Research

Business Strategy and the Environment, EarlyView.
ABSTRACT Biodiversity‐related financial risk is increasingly recognized not only as a market concern but as an ethical and systemic imperative for businesses and financial institutions. This systematic literature review synthesizes 103 peer‐reviewed studies to examine how biodiversity risk is conceptualized, measured, and integrated within financial ...
Thang Ngoc Dang, Monomita Nandy, Suman Lodh, Khaled Hussainey   +3 more
wiley   +1 more source

Ancient planetary systems are orbiting a large fraction of white dwarf stars

, 2010
Infrared studies have revealed debris likely related to planet formation in orbit around ~30% of youthful, intermediate mass, main sequence stars.
B. Klein, B. Zuckerman, Bennett, Bergeron, Bowler, C. Melis, Chiang, Currie, D. Koester, Davis, Debes, Desharnais, Dufour, Dufour, Eisenstein, Farihi, Farihi, Gorlova, Jura, Jura, Jura, Jura, Jura, Jura, Jura, Jura, Kilic, Kilic, Kilic, Klein, Koester, Limoges, Lodders, M. Jura, Macintosh, McCook, Melis, Osterbrock, Reach, Rebull, Rhee, Sfeir, Sion, Su, Su, Tremblay, Trilling, Trujillo, von Hippel, Zuckerman, Zuckerman   +50 more
core   +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