Results 101 to 110 of about 114,517 (388)

Exsolution process in white dwarf stars

Astronomy & Astrophysics
Context. White dwarf stars are considered to be suitable cosmic laboratories for studying the physics of dense plasma. Furthermore, the use of white dwarf stars as cosmic clocks to date stellar populations and main sequence companions demands an appropriate understanding of the physics of white dwarfs in order to provide precise ages for these stars ...
Camisassa, María Eugenia, Baiko, Denis A., Torres Gil, Santiago, Rebassa Mansergas, Alberto   +3 more
openaire   +4 more sources

Row Crops and the U.S. Agricultural Trade Deficit: Recent Trends and Policy Issues

Applied Economic Perspectives and Policy, EarlyView.
ABSTRACT Row crops such as soybeans, corn, wheat, and cotton are the backbone of the U.S. farm sector, accounting for around $60 billion of exports in 2023. While U.S. row crop exports remain robust, growing concerns over the rising U.S. agricultural trade deficit underscore the need to appraise the ongoing market and policy dynamics affecting the ...
William Ridley, Stephen Devadoss
wiley   +1 more source

The Chromospheric Activity and Ages of M Dwarf Stars in Wide Binary Systems [PDF]

, 2005
We investigate the relationship between age and chromospheric activity for 139 M dwarf stars in wide binary systems with white dwarf companions. The age of each system is determined from the cooling age of its white dwarf component. The current limit for
Abt H. A., Boss A. P., Byrne P. B., Byrne P. B., Delfosse X., Giclas H. L., Nicole M. Silvestri, Pettersen B. R., Pringle J. E., Reid I. N., Suzanne L. Hawley, Terry D. Oswalt, Weidemann V.   +12 more
core   +4 more sources

The seismic properties of low-mass He-core white dwarf stars [PDF]

, 2012
Context. In recent years, many low-mass (0.45 M ) white dwarf stars expected to harbor He cores have been detected in the field of the Milky Way and in several galactic globular and open clusters.
A. C'orsico, A. Romero, L. Althaus, J. Hermes   +3 more
semanticscholar   +1 more source

Down Syndrome in Maternity Care: Mothers' Experiences of Prenatal Screening

American Journal of Medical Genetics Part A, EarlyView.
ABSTRACT Prenatal screening for Down syndrome (DS) is offered to expectant parents receiving antenatal care in many countries, with an emphasis on providing parents with the opportunity to make informed choices about their pregnancy. We examined experiences of prenatal screening among mothers of children with DS living in England, Scotland, or Wales ...
Tamar Rutter, Richard Hastings, Nicola Enoch, Samantha Flynn, Matthew Randell, Chris Stinton   +5 more
wiley   +1 more source

Asteroseismology of One of the Most Rapidly Rotating DBV Stars: EPIC 248705247

The Astrophysical Journal
We present a comprehensive analysis of oscillations of the helium-rich white dwarf DBV star EPIC 248705247 (SDSS J102106.69+082724.8). We extract the light curves from 79.7 days of K2 Campaign 14 data and identify 21 independent frequencies, including ...
Jiayi Zhang, Jianning Fu, Tianqi Cang, Jie Su, Yanhui Chen, Xiaoyu Ma, Gang Meng   +6 more
doaj   +1 more source

Management of Cardiovascular Health Issues in Turner Syndrome: Expert Insights and Expanded Recommendations From the 2024 Guideline Development Team

American Journal of Medical Genetics Part C: Seminars in Medical Genetics, EarlyView.
ABSTRACT Turner syndrome (TS) is frequently complicated by congenital heart disease (CHD). While left‐sided lesions such as bicuspid aortic valve (BAV) and coarctation of the aorta are the most common structural heart lesions in TS, other anomalies, such as aortic arch malformations, hypoplastic left heart syndrome (HLHS), persistent left superior vena
Katya de Groote, Sheetal R. Patel, Kristian Havmand Mortensen, Isabel Witvrouwen, Anthonie Duijnhouwer, Nicole M. Brown, Jasmine Grewal, Kathryn C. Chatfield, Aaron T. Dorfman, Siddharth K. Prakash   +9 more
wiley   +1 more source

A White Dwarf Catalog from LAMOST DR11 Using Deep Learning

The Astrophysical Journal Supplement Series
White dwarfs, also referred to as degenerate dwarfs, represent the ultimate fate for the majority of stars in the Universe, unless their mass is large enough for them to evolve into black holes or neutron stars.
Shengwen Zhang, Yanxia Zhang, Chao Liu
doaj   +1 more source

Lithium production in the merging of white dwarf stars [PDF]

, 2012
The origin of R Coronae Borealis stars has been elusive for over 200 years. Currently, two theories for their formation have been presented. These are the Final Flash scenario, in which a dying asymptotic giant branch (AGB) star throws o its atmosphere ...
R. Longland, P. Lor'en-Aguilar, J. Jos'e, E. Garc'ia--Berro, L. Althaus   +4 more
semanticscholar   +1 more source

The Insistence of Blackness and the Persistence of Antiblackness in Ireland

Australian Journal of Social Issues, EarlyView.
ABSTRACT This paper positions Ireland as a critical site for examining the insistence of blackness and an antiblackness created and sustained through Irish ethnonationalist imaginaries and exclusionary processes. Drawing on connected sociologies and Irish Black Studies, this enquiry argues that antiblackness in Ireland operates as a generational force,
Philomena Mullen
wiley   +1 more source