Results 101 to 110 of about 3,640 (192)

Sun-as-a-star Observations of Obscuration Dimmings Caused by Filament Eruptions

The Astrophysical Journal
Filament eruptions often lead to coronal mass ejections (CMEs) on the Sun and are one of the most energetic eruptive phenomena in the atmospheres of other late-type stars.
Yu Xu, Hui Tian, Astrid M. Veronig, Karin Dissauer   +3 more
doaj   +1 more source

A stellar prominence eruption associated with a white-light flare on an M dwarf observed simultaneously by LAMOST and TESS

Astronomy & Astrophysics
Context. Stellar coronal mass ejections (CMEs) are regarded as major drivers of space weather in exoplanetary systems. Their large-scale expulsions of magnetised plasma may erode planetary atmospheres and influence the long-term evolution of close-in ...
Cai Chang, Lu Hong-Peng, Zhang Li-Yun, Su Tian-Hao, Shi Yu   +4 more
doaj   +1 more source

Magnetic interaction of stellar coronal mass ejections with close-in exoplanets: implication on planetary mass-loss and Ly α transits

Monthly Notices of the Royal Astronomical Society
ABSTRACT Coronal mass ejections (CMEs) erupting from the host star are expected to affect the atmospheric erosion processes of planets. For planets with a magnetosphere, the embedded magnetic field in the CMEs is thought to be the most important parameter to affect planetary mass-loss. In this work, we investigate the effect of different
Gopal Hazra, Aline A Vidotto, Stephen Carolan, Carolina Villarreal D’Angelo, Dúalta Ó Fionnagáin   +4 more
openaire   +3 more sources

X-Ray, UV, and Optical Observations of Proxima Centauri’s Stellar Cycle

The Astrophysical Journal
Proxima Cen (GJ 551; dM5.5e) is one of only about a dozen fully convective stars known to have a stellar cycle, and the only one to have long-term X-ray monitoring.
Bradford J. Wargelin, Steven H. Saar, Zackery A. Irving, Jonathan D. Slavin, Peter Ratzlaff, José-Dias do Nascimento Jr   +5 more
doaj   +1 more source

Solar astronomy [PDF]

An overview is given of modern solar physics. Topics covered include the solar interior, the solar surface, the solar atmosphere, the Large Earth-based Solar Telescope (LEST), the Orbiting Solar Laboratory, the High Energy Solar Physics mission, the ...
Antiochos, Spiro K., Canfield, Richard C., Chupp, Edward L., Deming, Drake, Doschek, George A., Dulk, George A., Foukal, Peter V., Gilliland, Ronald L., Noyes, Robert, Rosner, Robert   +9 more
core   +1 more source

History of two mass loss processes in VY CMa. [PDF]

Proc Int Astron Union, 2023
Quintana-Lacaci G, Velilla L, Fonfría JP, Cernicharo J, Castro-Carrizo A, Agúndez M, Decin L.   +6 more
europepmc   +1 more source

High-time-cadence Spectroscopy and Photometry of Stellar Flares on M-dwarf YZ Canis Minoris with Seimei Telescope and TESS. II. Statistical Properties of Blue/Red Asymmetries in the Hα Line

The Astrophysical Journal
M-dwarfs frequently produce flares, and their associated coronal mass ejections (CMEs) may threaten the habitability of close-in exoplanets. M-dwarf flares sometimes show prominence eruption signatures, observed as blue/red asymmetries in the H α line ...
Yuto Kajikiya, Kosuke Namekata, Yuta Notsu, Kai Ikuta, Hiroyuki Maehara, Bunei Sato, Daisaku Nogami   +6 more
doaj   +1 more source

High-time-cadence Spectroscopy and Photometry of Stellar Flares on M dwarf YZ Canis Minoris with the Seimei Telescope and TESS. I. Discovery of Rapid and Short-duration Prominence Eruptions

The Astrophysical Journal
M dwarfs show frequent flares and associated coronal mass ejections (CMEs) may significantly impact close-in habitable planets. M dwarf flares sometimes show blue/red asymmetries in the H α line profile, suggesting prominence eruptions as an early stage ...
Yuto Kajikiya, Kosuke Namekata, Yuta Notsu, Hiroyuki Maehara, Bunei Sato, Daisaku Nogami   +5 more
doaj   +1 more source

Extreme energetic particle events by superflare-asssociated CMEs from solar-like stars. [PDF]

Sci Adv, 2022
Hu J, Airapetian VS, Li G, Zank G, Jin M.   +4 more
europepmc   +1 more source

Occurrence rate of stellar Type II radio bursts from a 100 star-year search for coronal mass ejections

Astronomy & Astrophysics
Coronal mass ejections (CMEs) are major drivers of space weather in the Solar System, but their occurrence rate on other stars is unknown. A characteristic (deca-)metric radio burst with a time-frequency drift, known as a Type II radio burst, is a key observational signature of CMEs. We searched a total of 107 years of stellar data
David C. Konijn, Harish K. Vedantham, Cyril Tasse, Timothy W. Shimwell, Martin J. Hardcastle, Joseph R. Callingham, Ekaterina Ilin, Alexander Drabent, Philippe Zarka, Floris F. S. van der Tak, Sanne Bloot   +10 more
openaire   +2 more sources