Results 31 to 40 of about 17,719 (230)

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

Swift, XMM-Newton, and NuSTAR observations of PSR J2032+4127/MT91 213 [PDF]

, 2017
We report our recent Swift, NuSTAR, and XMM-Newton X-ray and Lijiang optical observations on PSR J2032+4127/MT91 213, the gamma-ray binary candidate with a period of 45-50 years.
Hou, X., Hui, C. Y., Kong, A. K. H., Li, K. L., Takata, J., Tam, P. H. T.   +5 more
core   +2 more sources

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

Continuous heating of a giant X-ray flare on Algol [PDF]

, 1999
Giant flares can release large amounts of energy within a few days: X-ray emission alone can be up to ten percent of the star's bolometric luminosity.
BH Foing, F. Favata, G Boella, GHJ Van den Oord, GHJ Van den Oord, HMK Al-Naimiy, HS Hudson, HS Hudson, J. H. M. M. Schmitt, JHMM Schmitt, JHMM Schmitt, JM Ferreira, KG Strassmeier, M Kürster, N Grosso, NE White, PB Byrne, R Ottmann, RA Stern, RJ Bray, S Masuda, S Tsuneta, S Tsuneta, SH Saar, T Preibisch, T Preibish, TG Forbes, VG Graffagnino   +27 more
core   +3 more sources

A survey of stellar X-ray flares from the XMM-Newton serendipitous source catalogue: Hipparcos-Tycho cool stars

, 2015
The X-ray emission from flares on cool (i.e. spectral-type F-M) stars is indicative of very energetic, transient phenomena, associated with energy release via magnetic reconnection. We present a uniform, large-scale survey of X-ray flare emission.
Fyfe, D., Pye, J. P., Rosen, S., Schroeder, A. C.   +3 more
core   +1 more source

X-ray Flaring Activity of Mrk 421 [PDF]

, 2004
We report results from a systematic search for X-ray flares from Mrk 421, using archival data from the Rossi X-ray Timing Explorer (RXTE) satellite. The flares are clearly seen over a wide range of timescales.
Cui, Wei
core   +3 more sources

Flare X-Ray Observations of AB Doradus: Evidence of Stellar Coronal Opacity

The Astrophysical Journal, 2005
13 pages, 3 figures, to be published in ApJ ...
Matranga, M., Mathioudakis, Michail, Kay, H.R.M., Keenan, Francis   +3 more
openaire   +3 more sources

X-Ray flares in Orion Young Stars. II. Flares, Magnetospheres, and Protoplanetary Disks

, 2008
We study the properties of powerful X-ray flares from 161 pre-main sequence (PMS) stars observed with the Chandra X-ray Observatory in the Orion Nebula region.
Alef W., Benz A. O., Birk G. T., Eric D. Feigelson, Franciosini E., Getman K. V., Getman K. V., Giusi Micela, Gordon P. Garmire, Gregory S. G., Hiei E., Imanishi K., Isobe H., Jardine M., Konstantin V. Getman, Lovelace R. V. E., Maggio A., Moira M. Jardine, Reale F., Scott G. Gregory, Siess L., Stelzer B.   +21 more
core   +1 more source

Probing clumpy stellar winds with a neutron star [PDF]

, 2007
INTEGRAL, the European Space Agency's gamma-ray observatory, tripled the number of super-giant high-mass X-ray binaries (sgHMXB) known in the Galaxy by revealing absorbed and fast transient (SFXT) systems.
Heras, J. Zurita, Walter, R.
core   +2 more sources

Was an Outburst of Aquila X-1 a Magnetic Flare?

, 2010
I point to an interesting similarity in the radio and the soft X-ray light curves between the November 2009 outburst of the X-ray binary Aquila X-1 and some solar flares.
Benz, Chen, Chevalier, Done, Favata, Fender, Gou, Güdel, Ishida, Maitra, Markoff, Mathys, Mauche, Miller-Jones, Rodriguez, Soker, Soker, Welsh, Wheatley, Yu   +19 more
core   +1 more source