Results 71 to 80 of about 11,425 (209)

Red supergiant stars in the Large Magellanic Cloud [PDF]

Astronomy & Astrophysics, 2018
The characteristics of infrared properties and mid-infrared (MIR) variability of red supergiant (RSG) stars in the Large Magellanic Cloud (LMC) are analyzed based on 12 bands of near-infrared (NIR) to MIR co-added data from 2MASS, Spitzer and WISE, and ∼6.6 yr of MIR time-series data collected by the ALLWISE and NEOWISE-R projects.
Yang, Ming, Bonanos, Alceste Z., Jiang, Bi-Wei, Gao, Jian, Xue, Meng-Yao, Wang, Shu, Lam, Man I, Spetsieri, Zoi T., Ren, Yi, Gavras, Panagiotis   +9 more
openaire   +2 more sources

Vibrational Relaxation of D2O Induced by Collision with He: A Rigid Bender Close Coupling Study

ChemPhysChem, Volume 25, Issue 15, August 1, 2024.
The vibrational quenching cross sections for the relaxation of the D2O (ν2=1,3ka,kc) molecule by collision with He are presented. A monotonic increase of the cross sections is observed for high collision energies. Abstract The vibrational relaxation of the first excited bending state of D2O induced by collision with He is studied at the close coupling ...
Ricardo Manuel García‐Vázquez, Lisán David Cabrera‐González, Otoniel Denis Alpizar, Thierry Stoecklin   +3 more
wiley   +1 more source

The Transport of Angular Momentum for Massive Stars. I. Formation of Slowly Rotating Early-type Nitrogen-sequence Wolf–Rayet Stars

The Astrophysical Journal
The evolutionary scenario of early-type nitrogen-sequence Wolf–Rayet (WNE) stars predicts a slowly rotating subclass that typically forms after the red supergiant phase.
Jijuan Si, Yan Li, Xue-Feng Li, Zhi Li
doaj   +1 more source

The Time-averaged Mass-loss Rates of Red Supergiants as Revealed by Their Luminosity Functions in M31 and M33

The Astrophysical Journal, 2023
Mass loss in red supergiants (RSGs) is generally recognized to be episodic, but mass-loss prescriptions fail to reflect this. Evolutionary models show that the total amount of mass lost in this phase determines if these stars evolve to warmer ...
Philip Massey, Kathryn F. Neugent, Sylvia Ekström, Cyril Georgy, Georges Meynet   +4 more
doaj   +1 more source

The past and future evolution of a star like Betelgeuse

, 2013
We discuss the physics and the evolution of a typical massive star passing through an evolutionary stage similar to that of Betelgeuse. After a brief introduction recalling various observed parameters of Betelgeuse, we discuss the Pre-Main-Sequence phase
Ekstrom, Sylvia, Georgy, Cyril, Groh, Jose, Haemmerle, Lionel, Maeder, Andre, Meynet, Georges   +5 more
core   +1 more source

Probing extreme black‐hole outflows on short timescales via high spectral‐resolution x‐ray imagers

Astronomische Nachrichten, Volume 345, Issue 6-7, July-August 2024.
Abstract We investigate outflows and the physics of super‐Eddington versus sub‐Eddington regimes in black hole systems. Our focus is on prospective science using next‐generation high‐resolution soft x‐ray instruments. We highlight the properties of black hole ultraluminous x‐ray source (ULX) systems in particular. Owing to scale invariance in accreting
C. Pinto, J. F. Steiner, A. Bodaghee, P. Chakraborty, M. Sobolewska, D. R. Pasham, A. Ogorzalek, J. Zuhone, A. Bogdan, M. Vogelsberger   +9 more
wiley   +1 more source

The convection of close red supergiant stars observed with near-infrared interferometry

, 2015
Our team has obtained observations of the photosphere of the two closest red supergiant stars Betelgeuse ($\alpha$ Ori) and Antares ($\alpha$ Sco) using near infrared interferometry.
Aurière, Michel, Chiavassa, Andrea, Kervella, Pierre, Montargès, Miguel, Perrin, Guy   +4 more
core   +2 more sources

An Interferometric Imaging Survey of Red Supergiant Stars

, 2021
Red supergiant stars (RSGs) are an end stage of massive star evolution. Among the notable behaviors of stars during this stage are their irregular and semi-regular variability and mass-loss. In order to better understand the sources of these phenomena, we collected high resolution optical interferometric observations of 17 RSGs using the Center for ...
openaire   +1 more source

Characterizing the dynamical magnetosphere of the extremely slowly rotating magnetic O9.7 V star HD 54879 using rotational modulation of the Hα profile

Astronomische Nachrichten, Volume 345, Issue 4, May 2024.
Abstract The magnetic field in the O9.7 V star HD 54879 has been monitored for almost a decade. Spectropolarimetric observations reveal a rather strong mean longitudinal magnetic field that varies with a period of about 7.41 years. Observations in the Hα$$ \alpha $$ line show a variation with the same period, while the Hβ$$ \beta $$ line shows only ...
Manfred Küker, S. P. Järvinen, S. Hubrig, Ilya Ilyin, M. Schöller   +4 more
wiley   +1 more source

SN 2023ixf: The Closest Supernova of the Decade

Universe
Supernova 2023ixf occurred on 18 May 2023 in the nearby galaxy Messier 101 (D≈6.85 Mpc), making it the closest supernova in the last decade. Following its discovery, astronomers around the world rushed to observe the explosion across the electromagnetic ...
Wynn Jacobson-Galán
doaj   +1 more source