Results 121 to 130 of about 9,582 (206)
Spectroscopic evidence for a large spot on the dimming Betelgeuse. [PDF]
Nat Commun, 2021 Alexeeva S +6 more
europepmc +1 more source
Betelgeuse, the Prototypical Red Supergiant
GalaxiesThe behavior of the bright red supergiant, Betelgeuse, is described with results principally from the past 6 years. The review includes imaging, photometry, and spectroscopy to record the Great Dimming of 2019–2020. This event was followed by a slow ongoing recovery from the massive surface mass ejection after which the stellar characteristics changed.
Dupree, Andrea, Montargès, Miguel
openaire +4 more sources
The Astrophysical JournalThe granulation of red supergiants (RSGs) in the Magellanic Clouds is systematically investigated by combining the latest RSG samples and light curves from the Optical Gravitational Lensing Experiment and the All-Sky Automated Survey for Supernovae.
Zehao Zhang +4 more
doaj +1 more source
Revisiting the evolutionary status of massive stars in the central parsec of the Milky Way
Astronomy & AstrophysicsContext. Massive stars and their winds strongly affect their environment. For example, they determine the accretion rate on to the Galactic centre (GC) supermassive black hole Sagittarius A* (Sgr A*).
Gormaz-Matamala A. C. +4 more
doaj +1 more source
The Explosion and Progenitor Properties of Type IIP Supernovae Inferred from MESA and STELLA Modelling. [PDF]
Res Notes AAS, 2020 Ricks W, Dwarkadas VV.
europepmc +1 more source
Stellar Evolution Through the Red Supergiant Phase
GalaxiesMassive stars less massive than $\sim$30\,{\msol} evolve into a red supergiant after the main sequence. Given a standard IMF, this means about 80\% of all massive stars will experience this phase. RSGs are dominated by convection, with a radius that extends to thousands of solar radii.
Ekström, Sylvia, Georgy, Cyril
openaire +2 more sources
The Samples and Binary Fractions of Red Supergiants in M31 and M33 by the HST Observations
The Astrophysical JournalThe binarity of red supergiants (RSGs) influences their evolution and the fate of supernovae. We investigate the binary fraction of RSGs in the Andromeda galaxy (M31) and Triangulum galaxy (M33) using photometry from the Hubble Space Telescope (HST ...
Min Dai, Shu Wang, Biwei Jiang, Ying Li
doaj +1 more source
Investigating the Electron-capture Supernova Candidate AT 2019abn with JWST Spectroscopy
The Astrophysical Journal LettersThe James Webb Space Telescope (JWST) has opened up a new window to study highly reddened explosive transients. We present results from late-time JWST follow-up spectroscopic observations with NIRSpec and MIRI-LRS of the intermediate-luminosity red ...
Sam Rose +7 more
doaj +1 more source
Hidden bipolarity in red supergiant winds
, 2004 Many observations of late-type M stars show large near-spherical circumstellar envelopes, yet planetary nebulae and supernova remnants are frequently axisymmetric. We present VLBI and MERLIN observations of masers around the red supergiant S Per which show varying degrees of axisymmetry and a dynamically significant magnetic field. There is no evidence
Richards, AMS +9 more
openaire +3 more sources
The Astronomical JournalMany mechanisms have been proposed to contribute to massive-star mass loss, but in general little is known about the physics involved. Studies of circumstellar environments around massive stars might help to determine which mechanisms are the most common.
Jamie R. Lomax +3 more
doaj +1 more source