Results 11 to 20 of about 442,397 (295)

A Note on the Flare Stars in the Coalsack [PDF]

open access: yesJournal of Mathematical and Fundamental Sciences, 2019
Ringkasan. Didalam tulisan ini dilaporkan penemuan 5 buah "flare stars" di daerah Coalsack.  Abstract. The discovery of 5 flare stars in the Coalsack is reported. 
B. Hidajat, A. Kuncoro
doaj   +2 more sources

Flare Activity and Magnetic Feature Analysis of the Flare Stars. III. K-type Dwarf Binary Components

open access: yesThe Astrophysical Journal
We analyze the light curve of 199 dwarf stars that are members of binary systems resolved by Kepler mission. All of them are K-type active stars in binary systems of which their flare activity has been confirmed.
Hadis Goodarzi   +2 more
doaj   +2 more sources

Evolution of Flare Activity in GKM Stars Younger Than 300 Myr over Five Years of TESS Observations

open access: yesThe Astronomical Journal
Stellar flares are short-duration (< hours) bursts of radiation associated with surface magnetic reconnection events. Stellar magnetic activity generally decreases as a function of both the age and Rossby number, R _0 , a measure of the relative ...
Adina D. Feinstein   +4 more
doaj   +2 more sources

Flare Hunting in Hot Subdwarf and White Dwarf Stars from Cycles 1–5 of TESS Photometry

open access: yesThe Astrophysical Journal Supplement Series
Stellar flares are critical phenomena on stellar surfaces, which are closely tied to stellar magnetism. While extensively studied in main-sequence (MS) stars, their occurrence in evolved compact stars, specifically hot subdwarfs and white dwarfs (WDs ...
Keyu Xing   +11 more
doaj   +2 more sources

Flare stars across the H-R diagram [PDF]

open access: yes, 2016
Flare stars appear to be as common among the hottest stars as among the coolest. Starspots, which are closely associated with flares, are likewise common among stars of all spectral types.
Balona, Luis A.
core   +1 more source

Flare Stars: A Short Review [PDF]

open access: yes, 2019
This project was carried out by co-author Dzombeta as a "senior thesis" in the Astronomy Major course AST424H, under the supervision of co-author Percy, who has revised and edited it for publication.Flare stars, or UV Ceti stars, are a type of eruptive ...
Dzombeta, Krstinja, Percy, John
core   +2 more sources

Flare Activity and Magnetic Feature Analysis of the Flare Stars II: Sub-Giant Branch [PDF]

open access: yes, 2021
We present an investigation of the magnetic activity and flare characteristics of the sub-giant stars mostly from F and G spectral types and compare the results with the main-sequence (MS) stars. The light curve of 352 stars on the sub-giant branch (SGB)
He, Han   +3 more
core   +1 more source

Flare stars in nearby Galactic open clusters based on TESS data [PDF]

open access: yes, 2021
The study is devoted to search for flare stars among confirmed members of Galactic open clusters using high-cadence photometry from TESS mission. We analyzed 957 high-cadence light curves of members from 136 open clusters.
Bicz, K.   +5 more
core   +1 more source

Optical and X-ray studies of newly discovered flare stars

open access: yes
Results are presented demonstrating that selection of dMe flare stars from their EU V/optical flux ratio revealed some of the most active members from the ROSAT Wide Field Camera (WFC) and EUVE all-sky surveys.
Ball, William Northey
core   +6 more sources

Spots and Flares in Hot Main Sequence Stars Observed by Kepler, K2, and TESS

open access: yesFrontiers in Astronomy and Space Sciences, 2021
About 22,000 Kepler stars, 7,000 K2 stars, and nearly 60,000 TESS stars from sectors 1–24 have been classified according to variability type. A large proportion of stars of all spectral types appear to have periods in their light curves consistent with ...
Luis A. Balona
doaj   +1 more source

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