Results 111 to 120 of about 11,425 (209)

Detection of Rydberg Lines from the Atmosphere of Betelgeuse

The Astrophysical Journal Letters
Emission lines from Rydberg transitions are detected for the first time from a region close to the surface of Betelgeuse. The H30 α line is observed at 231.905 GHz, with an FWHM ∼42 km s ^−1 and extended wings. A second line at 232.025 GHz (FWHM ∼21 km s
W. R. F. Dent, G. M. Harper, A. M. S. Richards, P. Kervella, L. D. Matthews   +4 more
doaj   +1 more source

Diffuse neutrino background from past core collapse supernovae. [PDF]

Proc Jpn Acad Ser B Phys Biol Sci, 2023
Ando S, Ekanger N, Horiuchi S, Koshio Y.
europepmc   +1 more source

Wind Accretion and State Transitions in Cygnus X-1

, 2002
We present the results of a spectroscopic monitoring program (from 1998 to 2002) of the H-alpha emission strength in HDE 226868, the optical counterpart of the black hole binary, Cyg X-1. The H-alpha profiles consist of (1) a P Cygni component associated
B. Csak, Bondi H., Brocksopp C., C. T. Bolton, D. R. Gies, D. W. Wingert, Ebisawa K., Herrero A., J. R. Thomson, Kaper L., L. L. Kiss, Lamers H. J. G. L. M., Liang E. P., M. V. McSwain, Meyer F., P. J. Wiita, Pooley G., Poutanen J., Puls J., R. L. Riddle, Voloshina I. B., W. Huang, Z. Wang   +22 more
core   +1 more source

The Infrared-bright SW Knots in the Complex Ejecta of VY CMa

The Astronomical Journal
The red hypergiant VY CMa is remarkable for its very visible record of high-mass-loss events observed over the range of wavelengths from the optical and infrared to the submillimeter region with Atacama Large Millimeter/submillimeter Array (ALMA). The SW
Roberta M. Humphreys, Terry J. Jones, Kris Davidson, A. M. S. Richards, R. Ravi, A. P. Singh, L. M. Ziurys   +6 more
doaj   +1 more source

Dusty Blue Supergiants: News from High-Angular Resolution Observations

, 2014
An overview is presented of the recent advances in understanding the B[e] phenomenon among blue supergiant stars in light of high-angular resolution observations and with an emphasis on the results obtained by means of long baseline optical stellar ...
de Wit, Willem-Jan, Oudmaijer, Rene, Vink, Jorick   +2 more
core   +2 more sources

Red Supergiant Stars as Supernova Progenitors – the X-ray Perspective [PDF]

Proceedings of the International Astronomical Union, 2015
AbstractRed Supergiants (RSGs) have for decades been assumed to be the progenitors of Type IIP supernovae (SNe). They are expected to have dense winds with mass-loss rates up to 10−4 M⊙ yr−1. We have created a database of available X-ray lightcurves of SNe.
openaire   +1 more source

A comprehensive grid of massive binary evolution models for the Galaxy: Surface properties of post-mass-transfer stars

Astronomy & Astrophysics
Context. Massive stars often evolve in binary systems, and the interactions of these systems significantly affect their evolution. Massive stars in the Galaxy serve as valuable test beds for such interactions due to their proximity. Aims. We computed the
Jin Harim, Langer Norbert, Ercolino Andrea, de Mink Selma E.   +3 more
doaj   +1 more source

Nucleosynthesis from massive stars 50 years after B2FH

, 2007
We review some important observed properties of massive stars. Then we discuss how mass loss and rotation affect their evolution and help in giving better fits to observational constraints.
Abbott, Abbott, Asplund, Barkana, Beers, Bessell, Binns, Bodenheimer, Bodenheimer, Bouret, Burbidge, Cameron, Carr, Carretta, Chiappini, Chiappini, Christlieb, Crowther, Crowther, Crowther, Crowther, Crowther, Cusumano, de Jager, Decressin, Dessart, Diehl, Dohm-Palmer, Domiciano de Souza, Domiciano de Souza, Domogatsky, Donati, Donati, Donati, Dufton, Dwarkadas, Eggenberger, Eldridge, Foellmi, Foellmi, Fröhlich, Fullerton, G. Meynet, Gies, González Hernández, González Hernández, Gotz, Grevesse, Hamann, Heap, Heger, Henrichs, Hirschi, Hirschi, Hirschi, Hopkins, Huang, Israelian, Keller, Kudritzki, Lamers, Langer, Leitherer, Lennon, Limongi, Lucatello, Lyubimkov, Maeder, Maeder, Maeder, Maeder, Maeder, Maeder, Maeder, Maeder, Maeder, Maeder, Maeder, Maeder, Maeder, Maeder, Maeder, Maeder, Maeder, Martayan, Massey, Mathis, McErlean, Mendel, Merrill, Meylan, Meynet, Meynet, Meynet, Meynet, Meynet, Meynet, Meynet, Meynet, Mokiem, Morel, Neiner, Neiner, Neiner, Norris, Nugis, Ohishi, Owocki, Owocki, Pelupessy, Penny, Plez, Prantzos, Prantzos, Pérez-Gonzàlez, Reeves, Schaller, Smith, Smith, Spite, Spruit, Talon, Tayler, Townsend, Tuthill, Tuthill, Ud-Doula, Umeda, van der Hucht, van der Hucht, van Loon, Veilleux, Venn, Venn, Venn, Venn, Vink, Vink, Vink, von Zeipel, Vrancken, Wisniewski, Woosley, Woosley, Woosley, Yoon, Zahn   +146 more
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New red supergiant stars in the other side of our Galaxy

Monthly Notices of the Royal Astronomical Society
ABSTRACT Red supergiant stars (RSGs) are massive stars in a late stage of evolution, crucial for understanding stellar life cycles and Galactic structure. However, RSGs on the far side of our Galaxy have been underexplored due to observational challenges.
Lin Zhang, Bingqiu Chen, Yi Ren, Zehao Zhang, Jian Gao, Biwei Jiang   +5 more
openaire   +2 more sources

Discovery of a Weak CN Spectral Absorption Feature in Red Supergiant Stars in the Andromeda (M31) and Triangulum (M33) Galaxies

The Astrophysical Journal
Using Keck DEIMOS spectra of stars in the Andromeda (M31) and Triangulum (M33) galaxies, selected from the large multiband (near-ultraviolet, visible light, and near-infrared) Hubble Space Telescope surveys PHAT and PHATTER, respectively, we have ...
Puragra Guhathakurta, Douglas Grion Filho, Antara R. Bhattacharya, Lara R. Cullinane, Julianne J. Dalcanton, Karoline M. Gilbert, Leo Girardi, Anika Kamath, Evan N. Kirby, Arya Maheshwari, Paola Marigo, Alexandra Masegian, Amanda C. N. Quirk, Rachel Raikar, Stanley M. Rinehart V, Caelum J. Rodriguez, Benjamin F. Williams   +16 more
doaj   +1 more source