Results 21 to 30 of about 6,211,798 (244)
X-ray flares of the young planet host Ds Tucanae A [PDF]
Astronomy & Astrophysics, 2022 Abridged. We observed the 40 Myr old star DS Tuc A with XMM-Newton and recorded two X-ray bright flares, with the second event occurring about 12 ks after the first one.
I. Pillitteri +7 more
semanticscholar +1 more source
The frequency of stellar X-ray flares from a large-scale XMM-Newton sample [PDF]
Proceedings of the International Astronomical Union, 2015 AbstractWe present estimates of cool-star X-ray flare rates determined from the XMM-Tycho survey (Pyeet al. 2015, A&A, 581, A28), and compare them with previously published values for the Sun and for other stellar EUV and white-light samples. We demonstrate the importance of applying appropriate corrections, especially in regard to the total ...
J. Pye, S. Rosen
semanticscholar +2 more sources
The RS CVn–type Star GT Mus Shows Most Energetic X-Ray Flares Throughout the 2010s [PDF]
, 2021 We report that the RS CVn–type star GT Mus (HR 4492, HD 101379+HD 101380) was the most active star in the X-ray sky in the last decade in terms of the scale of recurrent energetic flares. We detected 11 flares from GT Mus in 8 yr of observations with the
R. Sasaki +16 more
semanticscholar +1 more source
Geometry Diagnostics of a Stellar Flare from Fluorescent X-Rays [PDF]
The Astrophysical Journal, 2008 accepted for publication on the Astrophysical Journal ...
TESTA, Paola +7 more
openaire +3 more sources
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 +15 more
doaj +1 more source
The Astrophysical Journal, 2023 DQ Tau is a unique young high-eccentricity binary system that exhibits regular magnetic reconnection flares and pulsed accretion near periastron. We conducted NuSTAR, Swift, and Chandra observations during the 2022 July 30 periastron to characterize X ...
Konstantin V. Getman +5 more
doaj +1 more source
Constraining properties of GRB central engines with X-ray flares [PDF]
, 2021 X-ray flares in gamma-ray bursts (GRBs) are believed to be generated by the late activities of central engine, and thus provide an useful tool to diagnose the properties of central objects.
S. Yi +4 more
semanticscholar +1 more source
Stable Coronal X-Ray Emission over 20 yr of XZ Tau
The Astronomical Journal, 2023 XZ Tau AB is a frequently observed binary young stellar object in the Taurus Molecular Cloud; XZ Tau B has been classified as an EXOr object. We present new Chandra/HETG-ACIS-S observations of XZ Tau AB, complemented with variability monitoring of the ...
Steven M. Silverberg +5 more
doaj +1 more source
The Astrophysical Journal, 2023 We investigate gamma-ray emission in the impulsive phase of solar flares and the detectability of nonthermal signatures from protostellar flares. Energetic solar flares emit high-energy gamma rays of GeV energies, but their production mechanism and ...
Shigeo S. Kimura +2 more
doaj +1 more source
X-Ray Emission from Stellar Flares: Exosat Results [PDF]
International Astronomical Union Colloquium, 1989 AbstractWe present an overview of recent observations of stellar X-ray flares obtained with the EXOSAT Observatory. We discuss a few examples of flares from M dwarf flare stars, from RS CVn and Algol-type binaries, from single late-type stars (including a G0 dwarf and an A-type visual binary), and from pre-main-sequence objects.
R. Pallavicini, G. Tagliaferri
openaire +1 more source