Results 31 to 40 of about 9,582 (206)

Cool, Luminous, and Highly Variable Stars in the Magellanic Clouds. II. Spectroscopic and Environmental Analysis of Thorne–Żytkow Object and Super-AGB Star Candidates

The Astrophysical Journal, 2023
In previous work, we identified a population of 38 cool and luminous variable stars in the Magellanic Clouds and examined 11 in detail in order to classify them as either Thorne–Żytkow objects (TŻOs; red supergiants with a neutron star cores) or super ...
Anna J. G. O‘Grady, Maria R. Drout, B. M. Gaensler, C. S. Kochanek, Kathryn F. Neugent, Carolyn L. Doherty, Joshua S. Speagle, B. J. Shappee, Michael Rauch, Ylva Götberg, Bethany Ludwig, Todd A. Thompson   +11 more
doaj   +1 more source

Infrared Model Spectra for Evolving Red Supergiants [PDF]

Journal of Astronomy and Space Sciences, 1993
The space and ground based infrared spectra of red supergiants are modeled and arranged in order of their evolutionary status with their theoretical model parameters. The chemical compositions of the dust shells around red supergiants are affected by the
Kyung-Won Suh
doaj  

Variability Survey of Massive Stars in OB-Associations: Preliminary Results on the Cygnus Region

Open Astronomy, 2012
We present V - and I-passband photometry of massive stars in the Cyg OB1 and Cyg OB2 associations, based on about 80 observing nights spanning 300 days in the 2011 season. The variability of 22 supergiants and 48 OB-stars with luminosity classes III-V is
Laur J., Tuvikene T., Eenmäe T., Kolka I., Leedjärv L.   +4 more
doaj   +1 more source

Post-Red Supergiants

, 2008
The yellow hypergiants are found in a stage between the massive Red Supergiants and the Wolf-Rayet stars. This review addresses current issues concerning the evolution of massive stars, concentrating on the transitional post-Red Supergiant phase.
Oudmaijer, Rene, Davies, Ben, de Wit, Willem-Jan, Patel, Mitesh   +3 more
openaire   +2 more sources

Stellar winds from Massive Stars [PDF]

, 2000
We review the various techniques through which wind properties of massive stars - O stars, AB supergiants, Luminous Blue Variables (LBVs), Wolf-Rayet (WR) stars and cool supergiants - are derived. The wind momentum-luminosity relation (e.g.
A Feldmeier, AE Wright, AW Fullerton, AW Fullerton, AW Fullerton, AW Pauldrach, B Bohannan, B Salasnich, C Jager, C Jager, C Leitherer, C Leitherer, CD Garmany, CJ Skinner, D Reimers, D Vanbeveren, DB Friend, DJ Hillier, DJ Hillier, DJ Hillier, E Josselin, F Najarro, F Najarro, G Meynet, GM Harper, HGJLM Lamers, HJGLM Lamers, HJGLM Lamers, HJGLM Lamers, ID Howarth, JI Castor, JM Chapman, JS Vink, JTH Loon, K Davidson, KZ Stanek, L Dessart, L Drissen, Lamers, LF Smith, M Jura, M Jura, MAT Groenewegen, MJ Barlow, N Langer, N Panagia, N Reid, P Petrenz, PA Crowther, PA Crowther, PA Crowther, PD Bennett, PF Bowers, PRJ Eenens, PW Morris, R Sylvester, RK Prinja, RK Prinja, RK Prinja, RP Kudritzki, SM Haser, SP Owocki, T Chlebowski, T Nugis, TJ Harries, TJ Jones, W Schmutz, WL Waldron, WL Waldron, WR Hamann   +69 more
core   +3 more sources

To Be or Not to Be: Alicante-8, a Cluster or Not?

The Astronomical Journal, 2023
Recent surveys have uncovered new young massive clusters that host dozens of red supergiants (RSGs) near the inner Galaxy. However, many of them have still not been fully studied. Using Very Large Telescope/X-shooter near-infrared spectra, we present the
Randa Asa’d, V. D. Ivanov, I. Negueruela, J. M John, A. Gonneau, M. Rejkuba   +5 more
doaj   +1 more source

Red and Yellow Hypergiants

Galaxies
The red and yellow hypergiants are a rare and important phase in the evolution of the most massive stars that can reach the cool part of the HR Diagram.
Terry Jones
doaj   +1 more source

High spectral resolution spectroscopy of the SiO fundamental lines in red giants and red supergiants with VLT/VISIR

, 2013
We present high spectral resolution (R = 30000) spectroscopic observations of the SiO fundamental lines near 8.1 micron in 16 bright red giants and red supergiants using VLT/VISIR.
Ohnaka, Keiichi
core   +1 more source

The red supergiant population in the Perseus arm [PDF]

, 2017
We present a new catalogue of cool supergiants in a section of the Perseus arm, most of which had not been previously identified. To generate it, we have used a set of well-defined photometric criteria to select a large number of candidates (637) that ...
Dorda, R, González-Fernández, C, Negueruela, I   +2 more
core   +3 more sources

Spitzer SAGE-SMC Infrared Photometry of Massive Stars in the Small Magellanic Cloud [PDF]

, 2010
We present a catalog of 5324 massive stars in the Small Magellanic Cloud (SMC), with accurate spectral types compiled from the literature, and a photometric catalog for a subset of 3654 of these stars, with the goal of exploring their infrared properties.
A. Z. Bonanos, Antoniou, Azzopardi, Azzopardi, Azzopardi, B. A. Whitney, B. L. Babler, B. Shiao, Bolatto, Bonanos, C. J. Evans, C. W. Engelbracht, D. J. Lennon, D. L. Massa, de Jager, Dougherty, Evans, F. Köhlinger, Feast, Foellmi, Grebel, Groenewegen, Habing, Ita, J. L. Hora, J. Th. van Loon, K. A. Misselt, K. D. Gordon, Kato, Kippenhahn, Lanz, Lanz, Larsen, Lennon, Levesque, Levesque, M. Block, M. Meixner, M. R. Meade, M. Sewilo, Maeder, Massey, Massey, Massey, Massey, Massey, Massey, Meixner, N. Panagia, Oestreicher, Panagia, Panagia, Pojmański, Prieto, R. Indebetouw, S. Bracker, Skrutskie, Sloan, Srinivasan, Szczygiel, Szymański, T. P. Robitaille, Udalski, Udalski, van Loon, van Loon, van Loon, van Loon, van Loon, van Loon, Wisniewski, Wisniewski, Wright, Zaritsky, Zickgraf   +74 more
core   +3 more sources