Results 71 to 80 of about 5,024 (304)

Orbital motion detected in γ Cas Fe K emission lines

Astronomy & Astrophysics
A subset of Be stars, typified by the naked-eye star γ Cas, exhibits unusually bright and hard X-ray emission, the origin of which has remained debated for five decades.
Nazé Yaël, Tsujimoto Masahiro, Rauw Gregor, Gunderson Sean J.   +3 more
doaj   +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

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

Inverse sky islands: lowland river valleys drive microbial divergence while high elevations select for convergence in massive mountain ecosystems

Ecography, EarlyView.
Mountain ecosystems are often interpreted through the lens of the ‘sky island' model, where high‐elevation habitats function as isolated archipelagos. However, this model's applicability to massive, topographically complex mountain ranges where highlands are continuous and lowlands are fragmented remains untested.
Yazhou Zhang, J. Aaron Hogan, Jianjun Wang, Wenguang Sun, Yaojun Ye, Xin Liu, Minshu Song, Hang Sun   +7 more
wiley   +1 more source

Searching for GEMS: Discovery of the Nearby Post-common-envelope Binary System TIC-460388167

The Astrophysical Journal
Short-period white dwarf + main-sequence binaries are post-common-envelope binaries (PCEBs) that have survived a common envelope phase. Such systems, if detached and eclipsing, enable precise measurements of the constituent stars, providing a unique ...
Alexandra Boone, Henry A. Kobulnicky, Caleb I. Cañas, Shubham Kanodia, Andrew Monson, Peter Shea, William Cochran, Suvrath Mahadevan, Joe Ninan, Paul Robertson, Te Han, Arpita Roy, Christian Schwab, Madeleine Allen   +13 more
doaj   +1 more source

Constitution of the White Dwarf Stars [PDF]

Nature, 1931
IT is generally held that the white dwarf is in the degenerate state in the sense of the statistics of Fermi and Dirac. This assumption leads to another consequence bearing on the relative abundance of elements in the same star. Assuming further that (i) all atoms of various elements in the white dwarf are stripped of their extranuclear electrons, and (
openaire   +1 more source

Severe and Enduring Eating Disorders: A Qualitative Study of Patients' Experiences and Perceived Treatment Needs

European Eating Disorders Review, EarlyView.
ABSTRACT Objective Approximately 25% of individuals with eating disorders develop severe and enduring eating disorders (SEEDs); yet effective treatments remain limited. This study explored lived experiences of SEEDs, focussing on past treatments, as well as current needs and hopes. Method Twenty participants with eating disorders of ≥ 7 years and prior
Emilia Kotilahti, Anu Ruusunen, Katarina Lindstedt, Rasmus Isomaa   +3 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, Debes J, Steele A, Johnson B, Adams ER, Jacobson SA, Springmann A.   +6 more
europepmc   +1 more source

Mass-radius relations for massive white dwarf stars [PDF]

, 2005
We present detailed theoretical mass-radius relations for massive white dwarf stars with oxygen-neon cores. This work is motivated by recent observational evidence about the existence of white dwarf stars with very high surface gravities.
E. García-Berro, J. Isern, Isern, J., García Berro, E., Althaus, Leandro Gabriel, A. H. Córsico, Córsico, Alejandro Hugo, L. G. Althaus   +7 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