Results 11 to 20 of about 215 (165)

Flare And Starspot-Induced Variabilities Of Red Dwarf Stars In The Open Cluster M37: Photometric Study On Stellar Magnetic Activity [PDF]

open access: yes, 2016
We investigate the statistical properties of flare and starspot-induced variabilities of red dwarf stars in the open cluster M37, particularly (1) understanding magnetic activity phenomena that are seen in groups of stars (with the same age and mass) and (2) the correlations among activity indicators.
Chang, Seo-Won   +2 more
openaire   +3 more sources

TESS Observations of Outbursts on Polars—Superflares [PDF]

open access: yesThe Astrophysical Journal
Flare events are magnetic activities on the stellar surface, which can provide us with information about the accretion behavior and evolution of polars. In this paper, we search for flare events on polars from all the available 2 minute cadence TESS data
Qishan Wang   +2 more
doaj   +2 more sources

Apache Point Observatory (APO)/SMARTS Flare Star Campaign Observations. I. Blue Wing Asymmetries in Chromospheric Lines during Mid-M-Dwarf Flares from Simultaneous Spectroscopic and Photometric Observation Data [PDF]

open access: yesThe Astrophysical Journal
We conducted the time-resolved simultaneous optical spectroscopic and photometric observations of mid-M-dwarf flare stars YZ CMi, EV Lac, and AD Leo. Spectroscopic observations were obtained using Apache Point Observatory 3.5 m and Small and Moderate ...
Yuta Notsu   +14 more
doaj   +2 more sources

Are their flaring specialities associated with their being giant stars? [PDF]

open access: yes, 2021
Aims. We aim to give a reliable estimate of the number of flaring giant stars in the Kepler field. By analyzing the flaring activity of these stars, we explored their flare statistics and the released flare energies.
Gaulme, P.   +19 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 [PDF]

open access: yes, 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   +2 more
core   +4 more sources

A confined dynamo: Magnetic activity of the K-dwarf component in the pre-cataclysmic binary system V471 Tauri [PDF]

open access: yes, 2021
Context. Late-type stars in close binary systems can exhibit strong magnetic activity owing to rapid rotation supported by tidal locking. On the other hand, tidal coupling may suppress the differential rotation which is a key ingredient of the magnetic ...
Seli, Bálint Attila   +16 more
core   +1 more source

AASLD practice guidance on drug, herbal, and dietary supplement–induced liver injury

open access: yes, 2022
Hepatology, EarlyView.
Robert J. Fontana   +6 more
wiley   +1 more source

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

open access: yes, 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   +11 more
core   +1 more source

Decameter Radioemission from Red Dwarf Flare Stars [PDF]

open access: yes, 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.   +6 more
core   +5 more sources

Atmospheres of brown dwarfs [PDF]

open access: yes, 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

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