Results 31 to 40 of about 137 (115)

Time resolved spectroscopic observations of an M-dwarf flare star EV Lac during a flare. [PDF]

, 2016
Flares are explosions on the surface of the Sun and stars. We can find stellar flares frequently on M-dwarf stars. EV Lac, one of the M-dwarf flare stars, is a good target for investigation of stellar flares.
Honda, Satoshi (5266576), Nogami, Daisaku, Honda, Satoshi, Shibata, Kazunari, Maehara, Hiroyuki (5266573), Notsu, Shota (5266570), Notsu, Shota, Notsu, Yuta (5266585), Notsu, Yuta, Namekata, Kosuke, Namekata, Kosuke (5301265), Maehara, Hiroyuki, Shibata, Kazunari (5266579), Nogami, Daisaku (5266582)   +13 more
core   +1 more source

Simultaneous photometric and CARMENES spectroscopic monitoring of fast-rotating M dwarf GJ 3270: discovery of a post-flare corotating feature

, 2021
© E.N. Johnson et al. 2021. This project was funded principally by the Deutsche Forschungsgemeinschaft through the Major Research Instrumentation Programme and Research Unit FOR2544 “Blue Planets around Red Stars”. CARMENES is an instrument at the Centro
Montes Gutiérrez, David, Cortés Contreras, Miriam, Caballero, J. A.   +2 more
core   +2 more sources

High Time Resolution Photometry of Red Dwarf Flare Stars I. A Search For Fine Structures on the Optical Light Curves of Flares [PDF]

International Astronomical Union Colloquium, 1989
AbstractA detailed analysis of 73 flares on UV Cet type stars observed at the 6 m telescope of the Special Astrophysical Observatory with 3x10–7 s time resolution shows no fine structures on flare light curves with time scales from 10–6 to 10–1 s.
G.M. Beskin, S.N. Mitronova, S.I. Neizvestnyj, V.L. Plakhotnichenko, L.A. Pustil'nik, V.F. Shvartsman, R.E. Gershberg   +6 more
openaire   +1 more source

Multi-wavelength Characterization of Stellar Flares on Low-mass Stars Using SDSS and 2 MASS Time-domain Surveys [PDF]

, 2012
We present the first rates of flares from M dwarf stars in both red optical and near-infrared (NIR) filters. We have studied ~50,000 M dwarfs from the Sloan Digital Sky Survey (SDSS) Stripe 82 area and 1321 M dwarfs from the Two Micron All Sky Survey ...
Kowalski, Adam F., Hawley, Suzanne L., Davenport, James R. A., Schmidt, Sarah J., Becker, Andrew C., Hilton, Eric J., Sesar, Branimir, Cutri, Roc   +7 more
core   +1 more source

High Time Resolution Photometry of Red Dwarf Flare Stars III. The Most Rapid and Faintest Observed Stellar Flares; their Physics and Statistics [PDF]

International Astronomical Union Colloquium, 1989
AbstractHigh time resolution monitoring of the UV Cet type flare stars has enabled as to detect flares with total duration of a few seconds and with energy output comparable to solar subflares. We find that the time scales of decay for such flares correspond to recombination times of optically thin gas or to cooling times of optically thick gas heated ...
G.M. Beskin, S.I. Neizvestnyj, V.L. Plakhotnichenko, L.A. Pustil'nik, V.F. Shvartsman, R.E. Gershberg   +5 more
openaire   +1 more source

Spectropolarimetric observations of active stars [PDF]

, 1997
This paper reports the results of five years (five runs, 23 nights of spectropolarimetric observations of active stars with the UCL Echelle Spectrograph of the Anglo-Australian Telescope. 225 circularly rand (our linearly) polarized spectra were recorded
Donati, J-F, Carter, BD, Cameron, Andrew Collier, Donati, J. -F., Rees, D. E., Cameron, A. C., Semel, M., Rees, DE, Carter, B. D., Semel, M   +9 more
core   +1 more source

The Flare and Warp of the Young Stellar Disk Traced with LAMOST DR5 OB-type Stars

, 2021
International audienceWe present an analysis of the spatial density structure for the outer disk from 8-14 kpc with the LAMOST DR5 13,534 OB-type stars and observe similar flaring on the north and south sides of the disk, implying that the flaring ...
Yu, Yang, Liu, Chao, Li, Lin-Lin, Huo, Zhen-Yan, Zhang, Bo, Liu, Zhi-Cun, Wen, Fang, Wang, Hai-Feng, Ju, Jie, Cui, Wen-Yuan, Tian, Hao, Feng, Shuai   +11 more
core   +1 more source

Decameter Radioemission from Red Dwarf Flare Stars

, 2001
Представлены результаты наблюдений спорадического декаметрового радиоизлучения вспыхивающих красных карликовых звезд, которые проводились на радиотелескопе УТР-2 в период с 1986 по 1995 г. Радионаблюдения вспыхивающих звезд в ДКМ диапазоне сопровождались
Гершберг, Р.Е., Лисаченко, В.Н., Шаховская, Н.И., Базелян, Л.Л., Алексеев, И.Ю., Абранин, Э.П., Браженко, А.И.   +6 more
core   +2 more sources

Atmospheres of brown dwarfs

, 2014
ChH highlights financial support of the European Community under the FP7 by an ERC starting grant. SLC acknowledges financial support of University of LeicesterBrown Dwarfs are the coolest class of stellar objects known to date. Our present perception is
Casewell, Sarah, Helling, Christiane
core   +1 more source

Some results of the coordinated observations of the red dwarf flare star EV Lac in 1986–1994 [PDF]

International Astronomical Union Colloquium, 1995
In 1986-94 a series of coordinated monitorings for the flare star EV Lac has been performed. The observations were aimed to collect homogeneous data on the star both in its active and quiet states, to study its flares and starspots. These photometric patrols were accompanied by monitorings of EV Lac of different other kinds: polarimetric, spectral ...
openaire   +1 more source