Results 21 to 30 of about 39,557 (290)

Flare Stars Database II [PDF]

Symposium - International Astronomical Union, 1995
Formation of the flare stars database (FSDB) continues (Tsvetkov et al. 1993). Since the beginning of systematic monitoring up to the present 1608 flare stars have been discovered with more than 3107 flare events observed for more than 9313 hours. (Repeated flares for stars from the solar neighbourhood, as well as the time used for their monitoring ...
K. P. Tsvetkova, M. K. Tsvetkov, K. Y. Stavrev   +2 more
openaire   +1 more source

M Dwarfs in SDSS Stripe 82: Photometric Light Curves and Flare Rate Analysis

, 2009
We present a flare rate analysis of 50,130 M dwarf light curves in SDSS Stripe 82. We identified 271 flares using a customized variability index to search ~2.5 million photometric observations for flux increases in the u- and g-bands.
Abazajian, Adam F. Kowalski, Adelman-McCarthy, Andrew A. West, Andrew C. Becker, Audard, Becker, Binney, Blanton, Bochanski, Bochanski, Bochanski, Branimir Sesar, Chalabaev, Covey, Covey, Covey, Covey, Eric J. Hilton, Finkbeiner, Finkbeiner, Frieman, Gizis, Gunn, Gunn, Güdel, Hawley, Hawley, Hogg, Ivezić, Ivezić, John J. Bochanski, Jurić, Kaiser, McGehee, Miller, Moore, Ng, Pettersen, Pier, Reid, Reid, Schlegel, Smith, Smolčić, Stoughton, Stoughton, Suzanne L. Hawley, Walkowicz, Welsh, West, West, Wielen, Wilson, York   +54 more
core   +1 more source

Investigating the Rotational Phase of Stellar Flares on M dwarfs Using K2 Short Cadence Data [PDF]

, 2018
We present an analysis of K2 short cadence data of 34 M dwarfs which have spectral types in the range M0 - L1. Of these stars, 31 showed flares with a duration between $\sim$10-90 min.
Doyle, J. G., Doyle, L., Ramsay, G., Scullion, E., Wu, K.   +4 more
core   +3 more sources

Deep XMM-Newton observation of the Eta Chamaleontis cluster

, 2010
The members of the Eta Chamaleontis cluster are in an evolutionary stage in which disks are rapidly evolving. It also presents some peculiarities, such as the large fraction of binaries and accretion disks, probably related with the cluster formation ...
Alecian, Arnaud, Baraffe, Brickhouse, Briggs, Buscombe, Böhm, Caballero, Caballero, Clausen, Crespo-Chacón, Damiani, Della Ceca, Favata, Flaccomio, Franciosini, Frink, Guenther, Gómez de Castro, Güdel, Haisch, J. F. Albacete Colombo, J. López-Santiago, Jayawardhana, Köhler, Lawson, Luhman, Lyo, Lyo, Lyo, López-Santiago, López-Santiago, López-Santiago, M. A. López-García, Mamajek, Mamajek, Marconi, Marino, Megeath, Moraux, Morrison, Murphy, Preibisch, Robrade, Sacco, Schmitt, Sicilia-Aguilar, Siess, Skrutskie, Smith, Song, Stelzer, Stelzer, Stelzer   +53 more
core   +1 more source

White-light Superflare and Long-term Activity of the Nearby M7-type Binary EI Cnc Observed with GWAC System

The Astrophysical Journal, 2023
Stellar white-light flares are believed to play an essential role in the physical and chemical properties of the atmosphere of the surrounding exoplanets.
Hua-Li Li, Jing Wang, Li-Ping Xin, Jian-Ying Bai, Xu-Hui Han, Hong-Bo Cai, Lei Huang, Xiao-Meng Lu, Yu-Lei Qiu, Chao Wu, Guang-Wei Li, Jing-Song Deng, Da-Wei Xu, Yuan-Gui Yang, Xiang-Gao Wang, En-Wei Liang, Jian-Yan Wei   +16 more
doaj   +1 more source

Probability Distribution Functions of Solar and Stellar Flares

Physics, 2022
The paper studies the soft X-ray data of solar flares and found that the distribution functions of flare fluence are successfully modeled by tapered power law or gamma function distributions whose power exponent is slightly smaller than 2, indicating ...
Takashi Sakurai
doaj   +1 more source

The Statistical Analyses of the White-Light Flares: Two Main Results About Flare Behaviours

, 2012
We present two main results, based on the models and the statistical analyses of 1672 U-band flares. We also discuss the behaviours of the white-light flares. In addition, the parameters of the flares detected from two years of observations on CR Dra are
Dal, H. A.
core   +1 more source

Properties of Flare Quasiperiodic Pulsations Based on a New TESS Flare Catalog

The Astrophysical Journal Supplement Series
Stellar flares are important indicators of stellar magnetic activity and have been widely studied. Detailed studies of flares have raised new questions. For example, the quasiperiodic pulsation (QPP) phenomenon in flares challenges standard flare models,
Yinpeng Wang, Li-yun Zhang, Tianhao Su, Prabhakar Misra, Xianming L. Han   +4 more
doaj   +1 more source

GALEX ultraviolet observations of stellar variability in the Hyades and Pleiades clusters

, 2009
We present GALEX near ultraviolet (NUV:1750 - 2750A) and far ultraviolet (FUV: 1350 - 1750A) imaging observations of two 1.2 degree diameter fields in the Hyades and Pleiades open clusters in order to detect possible UV variability of the member stars ...
Browne, S. E., Welsh, B. Y., Wheatley, J. M.   +2 more
core   +1 more source

The Renal Activity Index for Lupus Identifies Active Renal Disease and Treatment Response in Adult Patients With Systemic Lupus Erythematosus and Lupus Nephritis

Arthritis Care &Research, EarlyView.
Objective We evaluated the ability of the Renal Activity Index for Lupus (RAIL) to discriminate active lupus nephritis (LN) in adult patients with active systemic lupus erythematosus (SLE) and differentiate LN treatment response. Methods Urine samples from adults with biopsy‐proven active class III and IV LN from TULIP‐LN (active LN group ...
Hermine I. Brunner, Ellen M. Cody, Prasad Devarajan, Bin Huang, Chen Chen, Dominic Sinibaldi, Madhu Ramaswamy, Jacob Knagenhjelm, Frederick Jones, Philip Z. Brohawn, Raj Tummala, Catharina Lindholm, Wendy I. White   +12 more
wiley   +1 more source