Results 31 to 40 of about 6,507,263 (232)

AASLD practice guidance on drug, herbal, and dietary supplement–induced liver injury

, 2022
Hepatology, EarlyView.
Robert J. Fontana, Iris Liou, Adrian Reuben, Ayako Suzuki, M. Isabel Fiel, William Lee, Victor Navarro   +6 more
wiley   +1 more source

Delayed Development of Cool Plasmas in X-Ray Flares from the Young Sun-like Star κ 1 Ceti

The Astrophysical Journal, 2023
The Neutron star Interior Composition Explorer (NICER) X-ray observatory observed two powerful X-ray flares equivalent to superflares from the nearby young solar-like star κ ^1 Ceti in 2019. NICER follows each flare from the onset through the early decay,
Kenji Hamaguchi, Jeffrey W. Reep, Vladimir Airapetian, Shin Toriumi, Keith C. Gendreau, Zaven Arzoumanian   +5 more
doaj   +1 more source

A catalogue of white-light flares observed by Yohkoh [PDF]

, 2003
The aspect camera of the Soft X-ray Telescope (SXT) on Yohkoh provided the first systematic survey of white-light flares from an observatory in space. The observations were made in the Fraunhofer g-band at a pixel size of 2.46 arcsec and a typical sample
H. S. Hudson, N. V. Nitta, van Driel-Gesztelyi, L, Matthews, SA, L. van Driel-Gesztelyi, Hudson, HS, Nitta, NV, S. A. Matthews   +7 more
core   +1 more source

Hard X-ray flares in IGR J08408–4503 unveil clumpy stellar winds [PDF]

Astronomy & Astrophysics, 2007
Context : A 1000-s flare from a new hard X-ray transient, IGR J08408-4503, was observed by INTEGRAL on May 15, 2006 during the real-time routine monitoring of IBIS/ISGRI images performed at the INTEGRAL Science Data Centre. The flare, detected during a single one-hour long pointing, peaked at 250 mCrab in the 20-40 keV energy range.
Leyder, Jean-Christophe, Walter, R., Lazos, M., Masetti, N., Produit, N.   +4 more
openaire   +3 more sources

X-ray flares from the stellar tidal disruption by a candidate supermassive black hole binary [PDF]

Nature Communications, 2020
AbstractOptical transient surveys have led to the discovery of dozens of stellar tidal disruption events (TDEs) by massive black hole in the centers of galaxies. Despite extensive searches, X-ray follow-up observations have produced no or only weak X-ray detections in most of them.
Xinwen Shu, Wenjie Zhang, Shuo Li, Ning Jiang, Liming Dou, Zhen Yan, Fu-Guo Xie, Rongfeng Shen, Luming Sun, Fukun Liu, Tinggui Wang   +10 more
openaire   +4 more sources

Balmer and Soft X-ray Emission from Solar and Stellar Flares [PDF]

Symposium - International Astronomical Union, 1990
Integrated soft X-ray (8-12A) fluxes for solar flares have been scaled to the equivalent EXOSAT fluxes using spectra obtained from a variety of rocket-based experiments. The data show good agreement with the soft X-ray - Hγ correlation established by Butler et al. (1988) for stellar flares and confirm the basic similarity, in this respect, of flares on
openaire   +1 more source

What can be learnt from full disk X-ray observations of stellar flares? [PDF]

Symposium - International Astronomical Union, 1987
The Einstein Observatory demonstrated the existence of hot envelopes, i.e., stellar coronae, around most classes of normal stars (Vaiana et al. 1981). The coronae of late type stars of spectral type F through M are generally thought to be solar-like, i.e., structured and organised by the magnetic field topology and heated by some process(es) involving ...
J. H. M. M. Schmitt, H. Fink, F. R. Harnden   +2 more
openaire   +1 more source

Model file for Ishikawa et al. "Automatic Detection of Occulted Hard X-ray Flares Using Deep-Learning Methods" in Sol. Phys. (2021)

, 2021
The file named "model_occulted_flare_classifier.h5" is a Keras model file to detect occulated hard X-ray flares by RHESSI spectrogram data described in Ishikawa et al. 2021.
Matsumura, Hideaki, Glesener, Lindsay, Ishikawa, Shin-nosuke, Uchiyama, Yasunobu   +3 more
core   +1 more source

The solar—stellar connection: the relationship between flaring rates, flare power and quiescent X-ray background [PDF]

International Astronomical Union Colloquium, 1989
The nature of flare activity on dMc stars (red dwarfs with strong chromospheric IIα emission lines) has been the subject of many studies. Some years ago Lacy et al. (1976) demonstrated a relationship (see also Doyle et al., 1986) between mean flare power and quiescent luminosity, in the photometric U-band.
Richard A. Harrison, Gillian Pearce, Andrew Skumanich   +2 more
openaire   +1 more source

X-ray activity of the RS CVn-type star σ Gem from the first-year observations of the Einstein Probe

Astronomy & Astrophysics
Context. Stellar flares are energetic events driven by the sudden release of magnetic energy in the stellar atmosphere. Compared to the Sun, the diversity of stellar types and environments leads to a richer variety of flaring phenomena.
Mao X., Micela G., Favata F., Yuan W., Liu H., Cheng H.   +5 more
doaj   +1 more source