Results 41 to 50 of about 215 (165)
Red Stars, Green Planets: Evaluating Planetary Habitability in Light of M-Dwarf Superflares [PDF]
M-dwarf stars frequently emit high-energy flares; superflares, with energies of at least $10^{33}$ erg, are not uncommon. Repeated superflares can render planets uninhabitable, but at the same time, M-dwarfs do not emit the ultraviolet radiation that ...
Glazier, Amy
core +1 more source
A Single Power Law for the TRAPPIST-1 Flare Distribution across 4 Orders of Magnitude in Energy
The Astrophysical Journal LettersTRAPPIST-1 is an ultracool dwarf that flares frequently. These flares shape the surrounding planets’ high-energy irradiation environment, with consequences for atmospheric chemistry and escape, and they can contaminate transmission spectroscopy of those ...
Valeriy Vasilyev +12 more
doaj +1 more source
Ecology and Evolution, Volume 16, Issue 7, July 2026.The genus Chiropodomys has seen no new species described since the 1980s. Through integrated morphological and molecular analysis, a specimen from Yunnan, China, is identified as a distinct new species, C. wandingensis sp. nov., supported by significant genetic divergence from its closest relatives.
Yi‐shun Qian +3 more
wiley +1 more source
Flares on active M-type stars observed with XMM-Newton and Chandra. [PDF]
, 2007 M-type red dwarfs are among the most active stars. Their light curves display random variability of rapid increase and gradual decrease in emission.
Kraev, U.M., Mitra Kraev, Urmila
core
Rising Near-ultraviolet Spectra in Stellar Megaflares
The Astrophysical JournalFlares from M dwarf stars can attain energies up to 10 ^4 times larger than solar flares but are generally thought to result from similar processes of magnetic energy release and particle acceleration.
Adam F. Kowalski +7 more
doaj +1 more source
Searching for Rotational X‐Ray Modulation on TIC 277539431
Astronomische Nachrichten, Volume 347, Issue 3, March 2026.ABSTRACT TIC 277539431, a fast rotating M7 dwarf, was detected to host the highest latitude flare to date at 81°$$ {81}^{{}^{\circ}} $$. Magnetic activity like stellar flares occurring at high latitude indicate occurrence of coronal loops at these latitudes on fully‐convective M dwarfs. In contrast, sunspots usually occur below 30°$$ {30}^{{}^{\circ}} $
Desmond Dsouza +2 more
wiley +1 more source
The CARMENES search for exoplanets around M dwarfs. The He I triplet at 10830 Å across the M dwarf sequence [PDF]
, 2019 © ESO 2019. Artículo firmado por 27 autores. B.F. acknowledges funding by the DFG under Schm 1032/69-1. CARMENES is an instrument for the Centro Astronómico HispanoAlemán de Calar Alto (CAHA, Almería, Spain).
Montes Gutiérrez, David +3 more
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FUMES III: Ultraviolet and Optical Variability of M Dwarf Chromospheres [PDF]
, 2022 <p>We obtained ultraviolet and optical spectra for 9 M dwarfs across a range of rotation periods to determine whether they showed stochastic intrinsic variability distinguishable from flares.
Berta-Thompson, Zachory K. +4 more
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Flaring Activity for Low-mass Stars in the β Pictoris Moving Group
The Astronomical JournalStellar 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 +3 more
doaj +1 more source
The Constraint of Crewed Mars Missions Based on Current Radiation Dose Measurements
Space Weather, Volume 24, Issue 3, March 2026.Abstract Crewed missions to Mars will be a milestone of future space exploration programs. However, the absence of Earth's magnetic field leaves astronauts directly exposed to unattenuated energetic particles in deep space, primarily galactic cosmic rays (GCRs), resulting in significantly higher radiation levels and enhanced health risks. Understanding
Chao Zhang +4 more
wiley +1 more source