Results 171 to 180 of about 116,162 (381)

Five New Sirius-like White Dwarf–Main-sequence Star Systems with MagAO-X

The Astronomical Journal
Most known white dwarfs in multiple systems with main-sequence stars have been discovered with M-type companions, because the white dwarf causes detectable UV excess and bluer colors than expected from a single M star.
Logan A. Pearce, Jared R. Males, Sebastiaan Y. Haffert, Laird M. Close, Joseph D. Long, Eden A. McEwen, Joshua Liberman, Maggie Y. Kautz, Jay K. Kueny, Alycia J. Weinberger, Jialin Li, Elena Tonucci, Katie Twitchell, Avalon L. McLeod, Warren B. Foster, Olivier Guyon, Alexander D. Hedglen, Kyle Van Gorkom, Jennifer Lumbres, Lauren Schatz, Victor Gasho, Katie M. Morzinski, Phil M. Hinz   +22 more
doaj   +1 more source

Search for carbon stars and DZ white dwarfs in SDSS spectra survey through machine learning [PDF]

, 2013
Jianmin Si, A-Li Luo, Yin-Bi Li, Jiannan Zhang, Peng Wei, Yihong Wu, Fuchao Wu, Yongheng Zhao   +7 more
openalex   +1 more source

Asteroseismology of white dwarf stars

, 2014
Most of low- and intermediate-mass stars that populate the Universe will end their lives as white dwarf stars. These ancient stellar remnants have encrypted inside a precious record of the evolutionary history of the progenitor stars, providing a wealth of information about the evolution of stars, star formation, and the age of a variety of stellar ...
openaire   +2 more sources

Unlocking landscape transient dynamics: Integrating traditional ecological knowledge for enhanced analysis of land‐use changes and forest expansion in a Mediterranean ecosystem

People and Nature, EarlyView.
Abstract The Industrial Revolution triggered rural abandonment in Europe and had a profound impact on land configuration and ecosystem dynamics, mainly the growth of forests at the expense of open agricultural habitats. However, rural abandonment has been asynchronous in space and time, depending on regional socio‐economic dynamics.
Joan Bauzà, Miquel Grimalt, Daniel Oro
wiley   +1 more source

Gravitational Influence from Planets on the Measured Rates of Period Change of Pulsating White Dwarfs

The Astrophysical Journal
The measured rates of period change, $\dot{P}$ , in the signals of pulsating white dwarf stars are often interpreted as direct detections of structural changes from secular cooling.
Ling Xuan Yao, Keaton J. Bell, Andrew Dublin   +2 more
doaj   +1 more source

Double white dwarf mergers and elemental surface abundances in extreme helium and R Coronae Borealis stars [PDF]

, 2011
C. S. Jeffery, Amanda I. Karakas, Hideyuki Saio   +2 more
openalex   +1 more source

The Expanding Role of Gene Sequencing in Shaping Fetal Therapies: Clinical and Ethical Considerations

Prenatal Diagnosis, EarlyView.
ABSTRACT In utero interventions are transformative in addressing genetic and anatomic conditions during fetal development. Next generation sequencing enables early genetic testing, playing a pivotal role in prenatal decision‐making by supporting risk stratification, precise and timely diagnosis, which directly informs eligibility for fetal surgical and
Matthew A. Shear, Beltran Borges, Billie R. Lianoglou, Tony Lum, Emma Canepa, Jennifer L. Cohen, Julia E. H. Brown, Akos Herzeg   +7 more
wiley   +1 more source

White Dwarf Stars [PDF]

Nature, 1932
openaire   +3 more sources

Stellar Cycle and Evolution of Polar Spots in an M+WD Binary

The Astrophysical Journal
Stellar activity cycles reveal continuous relaxation and induction of magnetic fields. The activity cycle is typically traced through the observation of cyclic variations in total brightness or Ca H&K emission flux of stars, as well as cyclic variations ...
Xinlin Zhao, Song Wang, Xue Li, Yue Xiang, Fukun Xu, Shenghong Gu, Bing Du, Jifeng Liu   +7 more
doaj   +1 more source

A Search for White Dwarf Companions of Be Stars [PDF]

, 1992
A. J. M. Piters, E. J. A. Meurs, J. Coté, M. H. van Kerkwijk, J. van Paradijs, O. R. Pols, L. B. F. M. Waters   +6 more
openalex   +1 more source