Results 21 to 30 of about 22,322 (295)

X-ray flares in Orion young stars. I. Flare characteristics

, 2008
Pre-main sequence (PMS) stars are known to produce powerful X-ray flares which resemble magnetic reconnection solar flares scaled by factors up to 10^4.
Drake J. J., Eric D. Feigelson, Giuseppina Micela, Gordon P. Garmire, Hiei E., Isobe H., Jardine M., Konstantin V. Getman, Patrick S. Broos, Reale F., Reale F., Serio S., Siess L., Sylwester B.   +13 more
core   +1 more source

Enhanced off-center stellar tidal disruptions by supermassive black holes in merging galaxies [PDF]

, 2013
Off-center stellar tidal disruption flares have been suggested to be a powerful probe of recoiling supermassive black holes (SMBHs) out of galactic centers due to anisotropic gravitational wave radiations.
Chen, Xian, Liu, F. K.
core   +2 more sources

Models for stellar flares

The Astrophysical Journal, 1982
We study the response of certain spectral signatures of stellar flares (such as Balmer line profiles and the broad-band continuum) to changes in atmospheric structure which might result from physical processes akin to those thought to occur in solar flares.
L. E. Cram, D. T. Woods
openaire   +1 more source

A 7 Day Multiwavelength Flare Campaign on AU Mic. I. High-time-resolution Light Curves and the Thermal Empirical Neupert Effect

The Astrophysical Journal, 2023
We present light curves and flares from a 7 day, multiwavelength observational campaign of AU Mic, a young and active dM1e star with exoplanets and a debris disk. We report on 73 unique flares between the X-ray to optical data.
Isaiah I. Tristan, Yuta Notsu, Adam F. Kowalski, Alexander Brown, John P. Wisniewski, Rachel A. Osten, Eliot H. Vrijmoet, Graeme L. White, Brad D. Carter, Carol A. Grady, Todd J. Henry, Rodrigo H. Hinojosa, Jamie R. Lomax, James E. Neff, Leonardo A. Paredes, Jack Soutter   +15 more
doaj   +1 more source

Power-law Distribution of Solar Cycle–modulated Coronal Jets

The Astrophysical Journal Supplement Series, 2023
Power-law distributions have been studied as a significant characteristic of nonlinear dissipative systems. Since discovering the power-law distribution of solar flares that was later extended to nanoflares and stellar flares, it has been widely accepted
Jiajia Liu, Anchuan Song, David B. Jess, Jie Zhang, Mihalis Mathioudakis, Szabolcs Soós, Francis P. Keenan, Yuming Wang, Robertus Erdélyi   +8 more
doaj   +1 more source

The correlation between soft and hard X-rays component in flares: from the Sun to the stars

, 2007
In this work we study the correlation between the soft (1.6--12.4 keV, mostly thermal) and the hard (20--40 and 60--80 keV, mostly non-thermal) X-ray emission in solar flares up to the most energetic events, spanning about 4 orders of magnitude in peak ...
Favata, F., Hudson, H. S., Isola, C., Micela, G.   +3 more
core   +1 more source

Mass accretion to young stars triggered by flaring activity in circumstellar disks [PDF]

, 2011
Young low-mass stars are characterized by ejection of collimated outflows and by circumstellar disks which they interact with through accretion of mass.
Aarnio, Alexiades, Anders, Andrea Mignone, Armitage, Audard, Balbus, Balbus, Balbus, Balsara, Bessolaz, Bisnovatyi-Kogan, Bodo, Borkowski, Bouvier, Brandenburg, Brown, Cowie, Curran, Fabio Reale, Fadeyev, Favata, Feigelson, Fromang, Getman, Giovanni Peres, Giuliani, Gregory, Hartmann, Hawley, Hawley, Hayashi, Herczeg, Hirose, Hujeirat, Hujeirat, Johns-Krull, Kashyap, King, Koenigl, Kulkarni, Mignone, Mohanty, Muzerolle, Natta, Orlando, Orlando, Orlando, Orlando, Orlando, Powell, Reale, Reale, Reale, Reale, Romanova, Romanova, Romanova, Salvatore Orlando, Shakura, Shu, Smith, Spitzer, Tanaka, Telleschi, Wolk, Wolk, Zanni   +67 more
core   +3 more sources

Stellar Parameters and Spectroscopic Properties of TESS Objects Observed in the LAMOST Low- and Medium-resolution Spectral Survey

The Astrophysical Journal Supplement Series, 2022
Stellar parameters and magnetic activity are important for the understanding of stellar physics and dynamo theory. We have used LAMOST spectroscopic surveys to study stellar parameters and magnetic activity properties of TESS objects.
Li-yun Zhang, Tianhao Su, Prabhakar Misra, Xianming L. Han, Gang Meng, Qingfeng Pi, Jiawei Yang   +6 more
doaj   +1 more source

The MUSCLES Treasury Survey. V. FUV Flares on Active and Inactive M Dwarfs [PDF]

, 2018
M dwarf stars are known for their vigorous flaring. This flaring could impact the climate of orbiting planets, making it important to characterize M dwarf flares at the short wavelengths that drive atmospheric chemistry and escape.
Brown, Alexander, France, Kevin, Froning, Cynthia S., Hu, Renyu, Linsky, Jeffrey, Loyd, R. O. Parke, Miguel, Yamila, Redfield, Seth, Rugheimer, Sarah, Schneider, Christian, Segura, Antígona, Tian, Feng, Youngblood, Allison   +12 more
core   +3 more sources

Empirical Models of Stellar Flares : Constraints on Flare Theories [PDF]

International Astronomical Union Colloquium, 1983
ABSTRACTA review is presented on empirical flare models of UV Cet type stars based upon optical,UV, X-ray, and radio observations. The observational constraints on the flare energetics, nature of radiation sources, and flare structures are discussed, with special attention to the geometrical dimension and the magnetic field of the flaring region.
openaire   +1 more source