Results 181 to 190 of about 114,517 (388)

TheEUVEOptical Identification Campaign II: Late-Type and White Dwarf Stars [PDF]

, 1996
N. Craig, Antonella Fruscione, J. Dupuis, M. Mathioudakis, J. J. Drake, M. Abbott, C. A. Christian, R. Green, Todd A. Boroson, Steve B. Howell   +9 more
openalex   +1 more source

High‐frequency benthic flux measurements reveal dynamic diel nitrogen exchanges and water column coupling in a stormwater pond

Limnology and Oceanography, EarlyView.
Abstract This study reports the first set of combined high‐frequency dissolved oxygen (DO), ammonium (NH4+$$ {\mathrm{NH}}_4^{+} $$), and nitrate (NO3−$$ {\mathrm{NO}}_3^{-} $$) benthic flux measurements in a subtropical stormwater pond using the Chamber ARray for Observing Sediment Exchanges Long‐term (CAROSEL), a novel, long‐duration, autonomous ...
Mason Thackston, Donald Nuzzio, Csaba Vaczo, Jordon Beckler   +3 more
wiley   +1 more source

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

Revisiting the latitudinal cline of catadromy in Japanese eels

Limnology and Oceanography Letters, EarlyView.
Abstract Partial migration of organisms, in which only a subset of a population migrates, plays an important role in life‐history strategies and population resilience in many taxa, yet the mechanisms shaping it under changing environments need further investigation.
Kazuki Yokouchi, Nobuto Fukuda, Atsushi Nishimoto, Kazuhiro Aoki, Toshihiro Yamamoto, Kotaro Shirai   +5 more
wiley   +1 more source

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

The Structure of White-Dwarf Atmospheres. I. Model Atmospheres and Hydrogen-Line Profiles for Da-Type Stars

, 1966
Voichi Terashita, Satoshi Matsushima
openalex   +1 more source

Identity‐Enabled CDMA LiDAR for Massively Parallel Ranging with a Single‐Element Receiver

Laser &Photonics Reviews, EarlyView.
A novel LiDAR system integrates CDMA modulation with a single‐element detector to achieve massive channel parallel 3D imaging. By using a user identification code and a correlation‐based feedback loop, it overcomes signal collisions and the near‐far problem.
Yixiu Shen, Zi Heng Lim, Guangya Zhou
wiley   +1 more source

White Dwarfs in Wide Binaries: The Strong Effects of Stellar Evolution and Mass Loss

The Astrophysical Journal
We examine the statistics of main-sequence/main-sequence, main-sequence/white-dwarf, and white-dwarf/white-dwarf wide binaries at 10 ^2.5 –10 ^4 au separations in Gaia data.
Hsiang-Chih Hwang, Nadia L. Zakamska
doaj   +1 more source

Neutrino Emission and a Possible Model for Pre-White Dwarf Stars.

, 1962
Hong‐Yee Chiu, P. Morrison, H. Reeves
openalex   +2 more sources

Do All BaiiStars Have White Dwarf Companions? [PDF]

, 2000
Erika Böhm‐Vitense, Kenneth G. Carpenter, Richard D. Robinson, T. B. Ake, Jeffery A. Brown   +4 more
openalex   +1 more source