Results 111 to 120 of about 9,582 (206)

Sporadic mass ejection in red supergiants

The Astrophysical Journal, 1979
A general mechanism first proposed by Burke (1969) is applied to red supergiants for determining the spin-down rate and angular-momentum loss of rotating stars. This model relies principally on sporadic mass ejection, which is assumed to be the result of turbulent elements accelerating material in cool supergiant atmospheres.
Kafatos, Menas, Michalitsianos, A. G.
openaire   +3 more sources

Variable Stars in M31 Stellar Clusters from the Panchromatic Hubble Andromeda Treasury

The Astrophysical Journal
Variable stars in stellar clusters can offer key constraints on stellar evolution and pulsation models, utilizing estimates of host cluster properties to constrain stellar physical parameters.
Richard Smith, Avi Patel, Monika D. Soraisam, Puragra Guhathakurta, Pranav Tadepalli, Sally Zhu, Joseph Liu, Léo Girardi, L. Clifton Johnson, Sagnick Mukherjee, Knut A. G. Olsen, Benjamin F. Williams   +11 more
doaj   +1 more source

Probing the Propeller Regime with Symbiotic X-ray Binaries

Universe
At the moment, there are two neutron star X-ray binaries with massive red supergiants as donors. Recently, De et al. (2023) proposed that the system SWIFT J0850.8-4219 contains a neutron star at the propeller stage.
Marina D. Afonina, Sergei B. Popov
doaj   +1 more source

The red supergiants & Wolf-Rayet stars of NGC 604

, 2010
We study the post-main sequence stars in NGC 604, the most luminous HII region in M33. Previously, a number of Wolf-Rayet (WR) stars and one red supergiant (RSG) have been discovered.
Barbá, Brandner, Cardelli, Crowther, Davies, Drissen, Drissen, Eldridge, Eldridge, Eldridge, Elias, Esteban, Ferland, Freedman, González-Delgado, Hamann, Hunter, John J. Eldridge, Koornneef, Kroupa, Langon, Leitherer, Levesque, Maraston, Massey, Massey, Massey, Maíz-Apellániz, Meynet, Mónica Relaño, Oey, Relaño, Relaño, Smith, Stetson, Terlevich, Vílchez, Westera, Yoon, Zurita   +39 more
core   +1 more source

A Spectroscopic Hunt for Post–Red Supergiants in the Large Magellanic Cloud. II. Turbulent Line Broadening in the Spectra of LMC Yellow Supergiants

The Astrophysical Journal
Massive stars in the Hertzsprung gap are a mixed population of objects in short-lived evolutionary phases: yellow supergiants (YSGs) evolving toward the red supergiant (RSG) phase, partially stripped post-RSGs, and other, rarer outcomes of stellar ...
Trevor Z. Dorn-Wallenstein, Kaitlyn M. Chen, Samantha C. Wu, Jared A. Goldberg, Anna J. G. O’Grady, Ayanna T. Mann, Poderosa I. Don-Wallanchez   +6 more
doaj   +1 more source

Transients by Black Hole Formation from Red Supergiants: Impact of Dense Circumstellar Matter

The Astrophysical Journal
Failed supernovae (SNe), which are likely the main channel for forming stellar-mass black holes, are predicted to accompany mass ejections much weaker than typical core-collapse SNe.
Daichi Tsuna, Xiaoshan Huang, Jim Fuller, Anthony L. Piro   +3 more
doaj   +1 more source

Photometric and spectroscopic variability of the blue supergiant ρ Leo

Astronomy & Astrophysics
Context. The post-main-sequence evolution of massive stars remains poorly understood, particularly in the case of blue supergiants. As key drivers of the dynamical and chemical evolution of galaxies, massive stars warrant detailed investigation during ...
Checha V. A., Aret A., Kolka I., Liimets T., Araya I., Christen A., Avila Marín G. F., Levenhagen R. S., Cidale L., Eenmäe T., Hajiyeva G., Kivila Ü., Mitrokhina V., Ramler H., Verro T.   +14 more
doaj   +1 more source

Blue Supergiants in the Pinwheel Galaxy M101: Comparison with H II Region Chemical Abundances, Spectroscopic Distance, and an Independent Determination of the Hubble Constant

The Astrophysical Journal
We present a quantitative spectroscopic study of 13 blue supergiant stars in the Pinwheel Galaxy M101, based on data obtained with the Low Resolution Imaging Spectrometer available at the Keck I telescope.
Fabio Bresolin, Rolf-Peter Kudritzki, Miguel A. Urbaneja, Eva Sextl, Adam G. Riess   +4 more
doaj   +1 more source

Red supergiant variability, Observations and theory

, 2021
Betelgeuse's recent dimming event is just one of many intriguing phenomena displayed by this exquisite exemplar of red supergiants. In this invited review I will discuss what is known and thought about variability of red supergiants. This will focus on variations on dynamical and thermal timescales, such as convection, pulsation, and possible eruptions
openaire   +1 more source

Inner Workings: A massive star dies without a bang, revealing the sensitive nature of supernovae. [PDF]

Proc Natl Acad Sci U S A, 2020
Croswell K.
europepmc   +1 more source