Results 51 to 60 of about 137 (115)

Shock metamorphic effects in Itokawa phosphates: A comparison with megaregolith‐derived meteorites

Meteoritics &Planetary Science, Volume 61, Issue 3, Page 351-370, March 2026.
Abstract Returned regolith samples from the asteroid Itokawa provide a unique opportunity to compare shock metamorphic effects in unconsolidated regolith materials with those preserved in lithified meteorites, that is, megaregolith. We analyzed four Itokawa particles (Ueda—RA‐QD02‐0519, Narahara—RA‐QD02‐0573, Domon—RA‐QD02‐0588, Ishiuchi—RX‐MD03‐0212 ...
E. Dobrică, A. N. Krot, A. J. Brearley
wiley   +1 more source

Variability of the He I line at 10 830 Å

, 2020
The He  I infrared (IR) triplet at 10 830 Å is known as an activity indicator in solar-type stars and has become a primary diagnostic in exoplanetary transmission spectroscopy.
Schmitt, J. H. M. M., Hintz, D., Nagel, E., Caballero, J. A., Czesla, S., Fuhrmeister, B., Hildebrandt, L., Johnson, E. N., Jeffers, S. V., Schöfer, P., Montes, D.   +10 more
core   +2 more sources

Flaring Activity for Low-mass Stars in the β Pictoris Moving Group

The Astronomical Journal
Stellar flares from K and M dwarfs release panchromatic radiation characterized by a significantly higher brightness temperature (∼9–20 kK) than the star. The increased frequency of magnetic activity on young low-mass stars results in the energy released
Jordan N. Ealy, Joshua E. Schlieder, Thaddeus D. Komacek, Emily A. Gilbert   +3 more
doaj   +1 more source

The Complement System in ANCA‐Associated Vasculitis: Mechanistic Insights, Therapeutic Horizons, and Unmet Clinical Needs

Immunity, Inflammation and Disease, Volume 14, Issue 2, February 2026.
Complement activation, particularly via the alternative pathway, drives inflammation and organ damage in ANCA‐associated vasculitis. This review highlights mechanistic insights, tissue and biomarker evidence, and clinical implications of targeting the C5a–C5aR1 axis.
Kehinde Sunmboye, Pauline Millan
wiley   +1 more source

A Seven-day Multiwavelength Flare Campaign on AU Mic. III. Quiescent and Flaring Properties of the X-Ray Spectra and Chromospheric Lines

The Astrophysical Journal
We present the X-ray quiescent and flaring properties from a unique, 7 days multiwavelength observing campaign on the M1 flare star AU Mic. Combining the XMM-Newton X-ray spectra with the chromospheric line and broadband near-UV (NUV) and optical ...
Yuta Notsu, Isaiah I. Tristan, Rachel A. Osten, Alexander Brown, Adam F. Kowalski, Carol A. Grady   +5 more
doaj   +1 more source

The high-energy radiation environment around a 10 Gyr M dwarf: habitable at last?

, 2020
Recent work has demonstrated that high levels of X-ray and UV activity on young M dwarfs may drive rapid atmospheric escape on temperate, terrestrial planets orbiting within the habitable zone.
Duvvuri, Girish, Vieytes, M., Mauas, Pablo Jacobo David, Berta Thompson, Zachory K., Vieytes, Mariela, Vieytes, Mariela Cristina, Alvarado-Gomez, Julian, Schneider, P. Christian, Mauas, Pablo JD, Loyd, R. O. Parke, Alvarado-Gómez, J.D., France, K., Duvvuri, G., Pineda, J Sebastian, Koskinen, Tommi, Froning, Cynthia S, Berta-Thompson, Z.K., Froning, C.S., France, Kevin, Parke Loyd, R.O., Garraffo, Cecilia, Wilson, David J., Pineda, J. Sebastian, Koskinen, T., Pineda, J.S., Alvarado-Gómez, Julián D., Tian, Feng, Egan, H., Drake, Jeremy, Youngblood, Allison, Schneider, P Christian, Berta-Thompson, Zachory K., Garraffo, C., Kaltenegger, Lisa, Brown, Alexander, Drake, J.J., Mauas, Pablo J. D., Linsky, J.L., Linsky, Jeffrey L., Kaltenegger, L., Miguel, Yamila, Kowalski, Adam F., Rugheimer, Sarah, Kowalski, Adam F, Linsky, Jeffry L, Kowalski, A.F., Miguel, Y., Drake, Jeremy J., Brown, A., Parke Loyd, R. O., Tian, F., Wilson, David J, Mauas, P.J.D., Youngblood, A., Egan, Hilary, Schneider, P.C., Loyd, ROP, Drake, Jeremy J, Berta-Thompson, Zachory K, Froning, Cynthia S., Wilson, D.J., Rugheimer, S., Alvarado Gómez, Julián D.   +62 more
core   +1 more source

First Temperature Profile of a Stellar Flare Using Differential Chromatic Refraction

The Astrophysical Journal Letters
We present the first derivation of a stellar flare temperature profile from single-band photometry. Stellar flare DWF 030225.574−545707.45129 was detected in 2015 by the Dark Energy Camera as part of the Deeper, Wider, Faster program. The brightness (Δ m
Riley W. Clarke, Federica Bianco, James R. A. Davenport, Jeffery Cooke, Sara Webb, Igor Andreoni, Tyler Pritchard, Aaron Roodman   +7 more
doaj   +1 more source

Complementary genomic and morphological data elucidate the phylogeny of obscure darkling beetles (Blaptinae: Platynotini: Eurynotina)

Systematic Entomology, Volume 51, Issue 1, January‐March 2026.
First comprehensive phylogenomic study of subtribe Eurynotina using a combined dataset of 499 nuclear loci, 12 mitochondrial loci and 91 morphological characters covering all genera and species groups is presented. Eurynotina is monophyletic and genera within are redefined based on reassessment of old characters, generation of new characters, and ...
Ryan Lumen, Adam M. Rork, Aaron D. Smith, Marcin J. Kamiński   +3 more
wiley   +1 more source

Flare star observations with a single-photon counting imaging detector [PDF]

, 1995
At Los Alamos National Laboratory we are developing a new imaging sensor which combines high spatial and high temporal resolution over a large area format, while maintaining single-photon counting sensitivity and substaining a high count rate.
Baron, M.H., Ho, C., Priedhorsky, W.C., Casperson, D.E.   +3 more
core  

New Insights into the Large 1992 July 15–17 Flare on AU Microscopii: The First Detection of Posteruptive Energy Release on a Red Dwarf Star

The Astrophysical Journal, 1999
Extreme Ultraviolet Explorer (EUVE) observations of the long-duration 1992 July 15-17 flaring event on the red dwarf star AU Mic are discussed. The flare was detected in the EUVE Deep Survey (DS) Lexan/B band (65-190 A) and was made up of a large impulsive event corresponding to an increase in the extreme ultraviolet (EUV) emission by a factor of 15 ...
M. M. Katsova, J. J. Drake, M. A. Livshits   +2 more
openaire   +1 more source