Results 101 to 110 of about 73,128 (295)

Dilution of accreted planetary matter in hot DA white dwarfs according to their mass

Astronomy & Astrophysics
Context. A large proportion of observed white dwarfs show evidence of debris disks, remnants of the former planetary systems, and/or signatures of heavy elements in their atmospheres, induced by the accretion of planetary matter onto their surfaces.
Deal M., Vauclair S., Charpinet S., Vauclair G.   +3 more
doaj   +1 more source

MAGNETISM OF WHITE DWARFS (intermediate results of a survey for kilogauss magnetic fields in white dwarfs)

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, S. Bagnulo, S. Fabrika, A. Reisenegger, G. A. Wade, Inwoo Han, D. Monin   +6 more
doaj   +1 more source

Existence of Chandrasekhar's limit in generalized uncertainty white dwarfs. [PDF]

R Soc Open Sci, 2021
Mathew A, Nandy MK.
europepmc   +1 more source

Identification of 13 DB + dM and 2 DC + dM binaries from the Sloan Digital Sky Survey

, 2005
We present the identification of 13 DB + dM binaries and 2 DC + dM binaries from the Sloan Digital Sky Survey (SDSS). Before the SDSS only 2 DB + dM binaries and 1 DC + dM binary were known. At least three, possibly 8, of the new DB + dM binaries seem to
E. J. M. van den Besselaar, G. A. Nelemans, G. H. A. Roelofs, Greenstein, Harris, Iben, Kalirai, Kleinman, Liebert, Moffett, P. J. Groot, Paczynski, Pickles, Raymond, T. Augusteijn, Verbunt, Wagner, Wesemael, York   +18 more
core   +1 more source

Environmental and local habitat variables as predictors of trophic interactions in subtidal rocky reefs along the SE Pacific coast

Ecography, EarlyView.
Temperature generally drives latitudinal patterns in the strength of trophic interactions, including consumption rates. However, local community and other environmental conditions might also affect consumption, disrupting latitudinal gradients, which results in complex large‐scale patterns.
Catalina A. Musrri, Alistair G. B. Poore, Oscar Pino, Nicolás Riquelme, Wolfgang B. Stotz, Fadia Tala, Martin Thiel   +6 more
wiley   +1 more source

A Multi-Survey Approach to White Dwarf Discovery

, 2012
By selecting astrometric and photometric data from the Sloan Digital Sky Survey (SDSS), the L{\'e}pine & Shara Proper Motion North Catalog (LSPM-North), the Two Micron All Sky Survey (2MASS), and the USNO-B1.0 catalog, we use a succession of methods to ...
AlSayyad, Yusra, Bergeron, P., Davenport, James R. A., Dufour, P., Sayres, Conor, Subasavage, John P., Tofflemire, Benjamin M.   +6 more
core   +1 more source

For the Few, Not the Many: Tracing the Residualist and Compensatory Nature of British Energy Support

Environmental Policy and Governance, EarlyView.
ABSTRACT Drawing on extensive documentary analysis, this article traces the evolution of British energy policy support since World War II. It analyses shifts in policy design through two interpretive lenses: eligibility (residualist vs. universalist) and function (compensatory vs. preventive).
T. M. Croon, M. G. Elsinga, J. S. C. M. Hoekstra, M. Sunikka‐Blank, R. Galvin   +4 more
wiley   +1 more source

Structural Implications of the Chameleon Mechanism on White Dwarfs

Universe
We study the behaviour of the chameleon mechanism around white dwarfs and its impact on their structure. Using a shooting method of our own design, we solve the corresponding scalar–tensor equilibrium equations for a Chandrasekhar equation of state ...
Joan Bachs-Esteban, Ilídio Lopes, Javier Rubio   +2 more
doaj   +1 more source

Evolution of 3-9 Mo Stars for Z=0.001 - 0.03 and Metallicity Effects on Type Ia Supernovae

, 1998
Recent observations have revealed that Type Ia supernovae (SNe Ia) are not perfect standard candles but show some variations in their absolute magnitudes, light curve shapes, and spectra.
Bressan A., Charbonnel C., de Jager C., Hashimoto M., Hideyuki Umeda, Hitoshi Yamaoka, Ken'ichi Nomoto, Khokhlov A., Kudritzki R., Li X.-D., Maeder A., Schaerer D., Schaller G., Shinya Wanajo, Spruit H. C., Tornambe A.   +15 more
core   +1 more source

Exploring the Nexus Between Sustainability Index and Central European Stock Markets Competitiveness: Evidence Through Time–Frequency Analysis and SHAP

Journal of Forecasting, EarlyView.
ABSTRACT Sustainability has become an important factor shaping financial markets and investor behavior. This paper examines the relationship between sustainability indices and Central European stock markets using a time–frequency approach. Wavelet coherence is employed to capture time‐varying co‐movements between sustainability indices and stock market
Zuzana Janková, Dipak Kumar Jana, Michal Páleš, Elena Fleaca, Petr Dostál   +4 more
wiley   +1 more source