Results 51 to 60 of about 39,557 (290)

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

The 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, Weikai Zong, Roberto Silvotti, Jian-Ning Fu, Stéphane Charpinet, Tianqi Cang, J. J. Hermes, Xiao-Yu Ma, Haotian Wang, Xuan Wang, Tao Wu, Jiaxin Wang   +11 more
doaj   +1 more source

CHROMOSPHERIC ACTIVITY OF THE FLARE STAR YZ CMI IN QUIESCENCE ACCORDING TO THE FAST SPECTRAL MONITORING DATA

Odessa Astronomical Publications, 2016
Spectral monitoring of the flare star YZ CMi (U = 12.9, B = 12.7, V = 11.1) was carried out on the Zeiss-600 telescope at the Peak Terskol Observatory. We used a low resolution grating spectrograph with spectral resolution of ~ 100 Å and time resolution ...
I. A. Verlyuk
doaj   +1 more source

The statistical analyses of flares detected in B band photometry of UV Ceti type stars

, 2012
In this study, we present the unpublished flare data collected from 222 flares detected in the B band observations of five stars and the results derived by statistical analysis and modeling of these data.
Audard, Benz, Carrington, Contadakis, Coyner, Crespo-Chacón, Crespo-Chacón, Dal, Dal, Dawson, Eggen, Eker, Favata, Fleming, Fossi, Gershberg, Gershberg, Gershberg, Gershberg, Gordon, Green, Gurzadian, H.A. Dal, Haisch, Hardie, Haro, Hodgson, Hudson, Imanishi, Ishida, Joy, Joy, Katsova, Kukarin, Lacy, Landolt, Landolt, Leto, Lippincott, Marcy, Mavridis, Mazeh, Mirzoyan, Moffett, Montes, Motulsky, Nicastro, Osawa, Oskanian, Osten, Pandey, Pettersen, Pettersen, Pettersen, Poveda, Poveda, Reeves, Robrade, Rocha-Pinto, Rodonó, Rodonó, Roques, S. Evren, Shakhovskaya, Skumanich, Spanier, Temmer, Tokunaga, Van de Kamp, van den Oord, van den Oord, Van Maanen, Veeder, Walker, Wall, Wilson   +75 more
core   +1 more source

Prevalence of Systemic Lupus Erythematosus in Australia, 2010–2022: A Population‐Based Study Using Linked National Administrative Health Data

Arthritis Care &Research, EarlyView.
Objective Systemic lupus erythematosus (SLE) is a heterogenous inflammatory condition with widely varying global prevalence estimates. The frequency of SLE in the general population of Australia has been reported to be notably lower than contemporary estimates in countries such as the United States or United Kingdom, at 19 to 39 per 100,000 as opposed ...
Lucinda Roper, Rachel Black, Joanna Tieu, Winnie Chen, Matthew Parker, Catherine Hill, Natasha Nassar, Mandana Nikpour   +7 more
wiley   +1 more source

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

The 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, Ahmad Mehrabi, Habib G. Khosroshahi   +2 more
doaj   +1 more source

A Note on the Flare Stars in the Coalsack

Journal 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  

Temporal Variation of Flare Occurrence Rates via the Spot Evolution on the Sun and Solar-type Stars

The Astrophysical Journal
The spot evolution on the Sun and solar-type stars is important for understanding the nature of consequential flaring activity. This study statistically investigates the variance of flare occurrence rate through the time evolution of spots on the Sun and
Takato Tokuno, Kosuke Namekata, Hiroyuki Maehara, Shin Toriumi   +3 more
doaj   +1 more source

Mass Accretion, Spectral, and Photometric Properties of T Tauri Stars in Taurus Based on TESS and LAMOST

The Astronomical Journal, 2023
We present the analysis of 16 classical T Tauri stars (CTTSs) using LAMOST and TESS data, investigating spectral properties, photometric variations, and mass accretion rates.
Chia-Lung Lin, Wing-Huen Ip, Yao Hsiao, Tzu-Heng Chang, Yi-han Song, A-Li Luo   +5 more
doaj   +1 more source

Flare Stars in Star Clusters and Associations [PDF]

Symposium - International Astronomical Union, 1975
The study of stellar evolution can be undertaken either from a purely theoretical point of view or from a more observational approach. The present standpoint is the second one. It starts from the concepts of stellar evolution in associations and open clusters and from stellar flare activity.
V. A. Ambartsumian, L. V. Mirzoyan
openaire   +1 more source

A Survey of High Contrast Stellar Flares Observed by Chandra

, 2011
The X-ray light curves of pre-main sequence stars can show variability in the form of flares altering a baseline characteristic activity level; the largest X-ray flares are characterized by a rapid rise to more than 10 times the characteristic count rate,
Aarnio, Audard, Baba, Baraffe, Calvet, D'Alessio, Dahm, Damiani, Delgado, Drake, Edwards, Favata, Feigelson, Flaccomio, Garmire, Getman, Getman, Glassgold, Gutermuth, Gutermuth, Gutermuth, Güdel, Imanishi, J. E. McCleary, Jakimiec, Kohno, MacNeice, Muzerolle, Osten, Povich, Preibisch, Reale, Rebull, S. J. Wolk, Scargle, Schaefer, Serio, Shu, Shu, Siess, Skinner, Skinner, Skinner, Skrutskie, Smith, Tsuboi, Tsujimoto, Uzdensky, Winston, Winston, Wolk   +50 more
core   +1 more source