Results 1 to 10 of about 12,394 (217)

Yellow Supergiants and Post-red Supergiant Evolution in the Large Magellanic Cloud

The Astronomical Journal, 2023
The empirical evidence for an upper-mass limit for the red supergiant (RSG) progenitors of the Type II-P SNe at about 18 MSun, raises questions about the fate of the most luminous, most massive RSGs.
Roberta M. Humphreys, Terry J. Jones, John C. Martin   +2 more
doaj   +3 more sources

Red Supergiants in the Milky Way and Nearby Galaxies

Galaxies
Identifications of red supergiants (RSGs) in the Milky Way and nearby galaxies have experienced an exponential increase in recent years, driven by advancements in selection techniques, the continued expansion of archival datasets, and a steady increase ...
Alceste Z. Bonanos
doaj   +1 more source

The effect of massive binaries on stellar populations and supernova progenitors

, 2007
We compare our latest single and binary stellar model results from the Cambridge STARS code to several sets of observations. We examine four stellar population ratios, the number of blue to red supergiants, the number of Wolf-Rayet stars to O supergiants,
Belczynski, Brandt, Cameron, Cantiello, Cappellaro, Cappellaro, Chiosi, Christopher A. Tout, Crowther, Crowther, de Donder, de Donder, de Jager, Deupree, Dray, Dray, Eggenberger, Eggleton, Eggleton, Eldridge, Eldridge, Eldridge, Ferguson, Hansen, Heger, Heger, Heger, Heger, Hirschi, Hurley, Hurley, Izzard, Izzard, Izzard, John J. Eldridge, Kotak, Kroupa, Kudritzki, Langer, Livio, Maeder, Maeder, Massey, Massey, Meynet, Meynet, Meynet, Meynet, Meynet, Nugis, Paczynski, Pastorello, Petrovic, Petrovic, Podsiadlowski, Podsiadlowski, Podsiadlowski, Pols, Popov, Prantzos, Robert G. Izzard, Sills, Smartt, Smartt, Smith, Turatto, Van Dyk, Vanbeveren, Vanbeveren, Vink, Vink, Vázquez, Wellstein, Woosley, Young   +74 more
core   +1 more source

Disk winds of B[e] supergiants [PDF]

, 1998
The class of B[e] supergiants is characterized by a two-component stellar wind consisting of a normal hot star wind in the polar zone and a slow and dense disk-like wind in the equatorial region.
A.M. Magalhaes, B. Wolf, B. Wolf, C. Leitherer, F.-J. Zickgraf, F.-J. Zickgraf, F.-J. Zickgraf, F.-J. Zickgraf, G. Muratorio, H.J.G.L.M. Lamers, H.J.G.L.M. Lamers, J.P. Castor, N. Panagia, O. Stahl, R.E. Schulte-Ladbeck, R.M. Humphreys   +15 more
core   +2 more sources

MODELS OF CIRCUMSTELLAR MASERS IN BIPOLAR OUTFLOWS

Odessa Astronomical Publications, 2017
Sources of molecular maser radio emission in envelopes of late-type variable stars (red giants and supergiants) are considered. Radio and optical data on asymmetry of mass loss process in red giants are briefly reviewed.
G. M. Rudnitskij
doaj   +1 more source

COLOUR EXCESSES OF 74 SUPERGIANTS AND 30 CLASSICAL CEPHEIDS

Odessa Astronomical Publications, 2007
We derive accurate, homogeneous atmospheric parameters (Teff , log g, Vt, [Fe/H]) for 74 FGK non-variable supergiants and for 30 classical cepheids in 302 pulsation phases based on the highresolution, high signal-to-noise echelle spectra.
V. V. Kovtyukh, C. Soubiran, S. I. Belik, M. P. Yasinskaya, F. A. Chehonadskih, V. Malyuto   +5 more
doaj   +1 more source

Discovering New B[e] Supergiants and Candidate Luminous Blue Variables in Nearby Galaxies

Galaxies, 2023
Mass loss is one of the key parameters that determine stellar evolution. Despite the progress we have achieved over the last decades we still cannot match the observational derived values with theoretical predictions. Even worse, there are certain phases,
Grigoris Maravelias, Stephan de Wit, Alceste Z. Bonanos, Frank Tramper, Gonzalo Munoz-Sanchez, Evangelia Christodoulou   +5 more
doaj   +1 more source

A METHOD FOR DETERMINING THE PHYSICAL PARAMETERS OF HOT SUPERGIANTS BASED ON SPECTRAL ENERGY DISTRIBUTION ANALYSIS

Physical Sciences and Technology
This study determines the physical parameters of B- and A-type hot supergiants through the construction and analysis of their spectral energy distributions (SEDs).
Alina Gyuchtash, Shakhida Nurmakhametova, Nadezhda Vaidman, Serik Khokhlov, Aldiyar Agishev, Aigerim Bakhytkyzy   +5 more
doaj   +1 more source

Dissecting Galaxies with Quantitative Spectroscopy of the Brightest Stars in the Universe

, 2010
Measuring distances to galaxies, determining their chemical composition, investigating the nature of their stellar populations and the absorbing properties of their interstellar medium are fundamental activities in modern extragalactic astronomy helping ...
Allende Prieto, Beaulieu, Bonanos, Bono, Bresolin, Bresolin, Bresolin, Bresolin, Bresolin, Bresolin, Deharveng, Denicolo, Dopita, Evans, Fiorentino, Freedman, Garnett, Gieren, Gieren, Gieren, Humphreys, Kaufer, Kennicutt, Kewley, Kewley, Kobulnicky, Komatsu, Kudritzki, Kudritzki, Kudritzki, Lequeux, Macri, Mager, Magrini, Maiolino, Marconi, McCarthy, McCarthy, McGaugh, Meynet, Mould, Mould, Mould, Pettini, Pietrzynski, Pilyugin, Przybilla, Przybilla, Przybilla, Przybilla, Przybilla, Przybilla, Riess, Riess, Rizzi, Rosolowsky, Rubin, Saha, Sakai, Sandage, Schiller, Schlegel, Spergel, Tegmark, Tremonti, U, Urbaneja, Urbaneja, Urbaneja, Venn, Venn, Venn, Venn, Vilchez, Vlajic, Willner, Zaritski   +76 more
core   +1 more source

VdBH 222: a starburst cluster in the inner Milky Way [PDF]

, 2014
Context. It has been suggested that the compact open cluster VdBH 222 is a young massive distant object.Aims. We set out to characterise VdBH 222 using a comprehensive set of multi-wavelength observations.Methods.We obtained multi-band optical (UBVR) and
A. Marco, Andrillat, Babusiaux, Benjamin, Brand, Burton, Buzzoni, C. González-Fernández, Cardelli, Chesneau, Clark, Clark, Clark, Clark, Clark, Currie, Davies, Davies, Davies, Davies, Ekström, Fernie, Figer, Fiorucci, FitzGerald, Garzón, Georgy, González-Fernández, González-Fernández, Green, Hou, I. Negueruela, J. Maíz Apellániz, J. S. Clark, Jacoby, Johnson, Koornneef, Landolt, Levesque, Levesque, Marco, Marigo, Maíz Apellániz, Maíz Apellániz, Maíz Apellániz, Maíz Apellániz, Maíz Apellániz, Mermilliod, Meynet, Moorwood, Negueruela, Negueruela, Negueruela, Negueruela, Nishiyama, Palacios, Piatti, R. Dorda, Ramírez Alegíra, Reid, Reid, Rieke, Sanna, Skrutskie, Stetson, Sánchez-Blázquez, van den Bergh, Wegner, Winkler   +68 more
core   +4 more sources