Results 101 to 110 of about 17,719 (230)

Extreme radio flares and associated X-ray variability from young stellar objects in the Orion Nebula Cluster [PDF]

, 2017
Jan Forbrich, et al, ‘Extreme Radio Flares and Associated XRay Variability from Young Stellar Objects in the Orion Nebula Cluster’, The Astrophysical Journal, Vol. 844 (2), July 2017. DOI: https://doi.org/10.3847/1538-4357/aa7aa4.
Benz A. O., Bhatnagar S., Bower G. C., Broos P. S., Broos P. S., Broos P. S., Claire J. Chandler, Felli M., Forbrich J., Forbrich J., Gagné M., Getman K. V., Getman K. V., Getman K. V., Getman K. V., Getman K. V., Güdel M., Hillenbrand L. A., Jan Forbrich, Karl M. Menten, Kounkel M., Liebovitch L. S., Mark J. Reid, McMullin J. P., Osten R. A., Rivilla V. M., Rots A. H. ed Gabriel C., Scott J. Wolk, Sheehan P. D., Urvashi Rau, Victor M. Rivilla, Wolk S. J., Zapata L. A.   +32 more
core   +3 more sources

Description of the skull, braincase, and dentition of Moschognathus whaitsi (Dinocephalia, Tapinocephalia), and its palaeobiological and behavioral implications

The Anatomical Record, Volume 309, Issue 7, Page 1713-1748, July 2026.
Abstract A subadult Moschognathus whaitsi from the Eastern Cape Province, South Africa, was scanned using synchrotron radiation X‐ray computed tomography (SRXCT). Its subadult state allowed the cranial bones and teeth to be identified and individually reconstructed in 3D.
Tristen Lafferty, Luke A. Norton, Aliénor Duhamel, Julien Benoit   +3 more
wiley   +1 more source

Scalable, Advanced Machine Learning Based Approaches for Stellar Flare Identification: Application to TESS Short-cadence Data and Analysis of a New Flare Catalog

The Astronomical Journal
We apply multialgorithm machine learning models to TESS 2 minute survey data from Sectors 1–72 to identify stellar flares. Models trained with deep neural network, random forest, and XGBoost algorithms utilize four flare light-curve characteristics as ...
Chia-Lung Lin, Dániel Apai, Mark S. Giampapa, Wing-Huen Ip   +3 more
doaj   +1 more source

X-ray Emission from the FU Orionis Star V1735 Cygni

, 2009
The variable star V1735 Cyg (= Elias 1-12) lies in the IC 5146 dark cloud and is a member of the class of FU Orionis objects whose dramatic optical brightenings are thought to be linked to episodic accretion. We report the first X-ray detections of V1735
Browning, Doppmann, Flaccomio, Getman, Green, Groppi, Hamaguchi, Hamaguchi, Harvey, Herbig, Herbig, Imanishi, Kastner, Kevin R. Briggs, Kimberly R. Sokal, Lada, Lorenzetti, Manuel Güdel, Millan-Gabet, Petrov, Preibisch, Prisinzano, Quanz, Rodriguez, Sandell, Skinner, Stephen L. Skinner, Tsujimoto, Wolf, Zhu   +29 more
core   +1 more source

Multiaxial Fatigue Behavior of AA6016 and AA6016 to DX54D SPR Joints: Fracture Mechanisms and Data‐Driven Rupp's Model

Fatigue &Fracture of Engineering Materials &Structures, Volume 49, Issue 7, Page 2929-2944, July 2026.
ABSTRACT The fatigue and fracture behavior of self‐piercing rivet (SPR) joints between AA6016 aluminum sheets (1–2 mm) and DX54D steel (0.95 mm) was studied under 90°, 45°, and 0° multiaxial loading. Pure shear (90°) loading produced the highest fatigue strength, whereas multiaxial (45°) loading resulted in reduced performance, with pure tension (0 ...
Alan Woo, Amelie Malpot, Behzad Behravesh, Saeid Rezaee, Amirsalar Anousheh, Hamid Jahed   +5 more
wiley   +1 more source

Sun-as-a-star Analysis of the X1.6 Flare on 2023 August 5: Dynamics of Postflare Loops in Spatially Integrated Observational Data

The Astrophysical Journal Letters
Postflare loops are loop-like plasmas observed during the decay phase of solar flares, and they are expected to exist for stellar flares. However, it is unclear how postflare loops are observed in stellar flares’ cases.
Takato Otsu, Ayumi Asai, Kai Ikuta, Kazunari Shibata   +3 more
doaj   +1 more source

The Future of X-ray Time Domain Surveys

, 2012
Modern X-ray observatories yield unique insight into the astrophysical time domain. Each X-ray photon can be assigned an arrival time, an energy and a sky position, yielding sensitive, energy-dependent light curves and enabling time-resolved spectra down
Haggard, Daryl, Sivakoff, Gregory R.
core   +1 more source

Revealing the Formation of the <20 MeV Inner Proton Radiation Belt at L ∼ 2 During the 10–11 May 2024 Superstorm

Geophysical Research Letters, Volume 53, Issue 11, 16 June 2026.
Abstract A new proton radiation belt was identified during the geomagnetic superstorm of 10–11 May 2024. To investigate its origin, we use an MHD‐test particle simulation to model solar energetic proton (SEP) trapping and the evolution of the initial trapped proton population during the storm.
Murong Qin, Mary K. Hudson, Miles Engel, Brian T. Kress, Zhao Li, Maulik Patel, Wen Li, Kevin Pham, William R. Johnston, Xinlin Li, Shawn Young   +10 more
wiley   +1 more source

A Long-duration Superflare on the K Giant HD 251108

The Astrophysical Journal
Many giant stars are magnetically active, which causes rotational variability, chromospheric emission lines, and X-ray emission. Large outbursts in these emission features can set limits on the magnetic field strength and thus constrain the mechanism of ...
Hans Moritz Günther, Dheeraj Pasham, Alexander Binks, Stefan Czesla, Teruaki Enoto, Michael Fausnaugh, Franz-Josef Hambsch, Shun Inoue, Hiroyuki Maehara, Yuta Notsu, Jan Robrade, J. H. M. M. Schmitt, P. C. Schneider   +12 more
doaj   +1 more source

Quark-Nova Explosion inside a Collapsar: Application to Gamma Ray Bursts

Advances in Astronomy, 2009
If a quark-nova occurs inside a collapsar, the interaction between the quark-nova ejecta (relativistic iron-rich chunks) and the collapsar envelope leads to features indicative of those observed in Gamma Ray Bursts.
Rachid Ouyed, Denis Leahy, Jan Staff, Brian Niebergal   +3 more
doaj   +1 more source