Results 121 to 130 of about 3,913,690 (210)

Weak-CN Stars Are Ordinary Cool Red Supergiants

Weak CN absorption near ~8000 A has recently been detected in evolved red supergiants (RSGs) of 5-10 $M_\odot$ across three Local Group galaxies. These weak-CN RSGs sit in a narrow molecular regime: cool enough for CN to be visible in a non-carbon, C/O<1 atmosphere, but warm enough that TiO is not saturated and changes in $T_{\rm eff}$ and in the ...
Ting, Yuan-Sen, Guhathakurta, Puragra, Filho, Douglas Grion, Kirby, Evan N., Kim, Elliot M.   +4 more
openaire   +2 more sources

Evidence for extended chromospheres surrounding red giant stars [PDF]

, 1982
Observational evidence and theoretical arguments are summarized which indicate that regions of partially ionized hydrogen extending several stellar radii are an important feature of red giant and supergiant stars.
Stencel, R. E.
core  

A modeling perspective on the diversity of red supergiant stars exploding within circumstellar material

Astronomy & Astrophysics
With the ever faster cadence of untargeted surveys of the sky, the supernova (SN) community will capture a growing number of shock breakouts in red supergiant (RSG) stars in the coming years.
Dessart Luc, Jacobson-Galán Wynn V.
doaj   +1 more source

UV chromospheric and circumstellar diagnostic features among F supergiant stars [PDF]

, 1981
A survey of F supergiant stars to evaluate the extension of chromospheric and circumstellar characteristics commonly observed in the slightly cooler G, K, and M supergiant is discussed.
Stencel, R. E., Worden, S. P., Giampapa, M. S.   +2 more
core  

James Webb Space Telescope Observations of the Nearby and Precisely Localized FRB 20250316A: A Potential Near-IR Counterpart and Implications for the Progenitors of Fast Radio Bursts

The Astrophysical Journal Letters
We present deep James Webb Space Telescope near-infrared imaging to search for a quiescent or transient counterpart to FRB 20250316A, which was precisely localized with the CHIME Outriggers array to an area of 11 × 13 pc in the outer regions of NGC 4141 ...
Peter K. Blanchard, Edo Berger, Shion E. Andrew, Aswin Suresh, Kohki Uno, Charles D. Kilpatrick, Brian D. Metzger, Harsh Kumar, Navin Sridhar, Amanda M. Cook, Yuxin Dong, Tarraneh Eftekhari, Wen-fai Fong, Walter W. Golay, Daichi Hiramatsu, Ronniy C. Joseph, Victoria M. Kaspi, Mattias Lazda, Calvin Leung, Kiyoshi W. Masui, Juan Mena-Parra, Kenzie Nimmo, Aaron B. Pearlman, Vishwangi Shah, Kaitlyn Shin, Sunil Simha   +25 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

Imaging the subsurface architecture in porphyry copper deposits using local earthquake tomography. [PDF]

Sci Rep, 2023
Comte D, Palma G, Vargas J, Calle-Gardella D, Peña M, García-Fierro S, D'Andres J, Roecker S, Pichott S.   +8 more
europepmc   +1 more source

Evolutionary Synthesis Modeling of Red Supergiant Features in the Near--Infrared

, 2007
We present evolutionary synthesis models applied to near--infrared spectral features observed in the spectra of young Magellanic Cloud clusters and starburst galaxies.
Jeffrey D. Goldader, Livia Origlia, Ernesto Oliva, Claus Leitherer, Daniel Schaerer   +4 more
core  

Boil-off of red supergiants: mass loss and type II-P supernovae

The Open Journal of Astrophysics
The mass loss mechanism of red supergiant stars is not well understood, even though it has crucial consequences for their stellar evolution and the appearance of supernovae that occur upon core-collapse.
Jim Fuller, Daichi Tsuna
doaj   +1 more source

The convective photosphere of the red supergiant CE TauriI. VLTI/PIONIER H-band interferometric imaging

, 2018
International audienceRed supergiant stars are one of the latest stages in the evolution of massive stars. Their photospheric convection may play an important role in the launching mechanism of their mass loss; however, its characteristics and dynamics ...
F. Baron, M. Montargès, A. Chiavassa, A. Lèbre, Baron, F., Lèbre, A., B. Tessore, Montargès, M., Montarges, Miguel, Chiavassa, A., Norris, R., Tessore, B., R. Norris   +12 more
core   +1 more source