scholarly journals A study of the effect of rotational mixing on massive stars evolution: surface abundances of Galactic O7-8 giant stars

2017 ◽  
Vol 599 ◽  
pp. A30 ◽  
Author(s):  
F. Martins ◽  
S. Simón-Díaz ◽  
R. H. Barbá ◽  
R. C. Gamen ◽  
S. Ekström
Keyword(s):  
Massive Stars ◽  
Giant Stars ◽  
Stars Evolution

29. Stellar Spectra (Spectres Stellaires)

1991 ◽  
Vol 21 (1) ◽  
pp. 309-326
Keyword(s):  
Milky Way ◽  
Massive Stars ◽  
Magellanic Clouds ◽  
Dynamical Interaction ◽  
Stellar Spectra ◽  
Luminous Blue Variables ◽  
Classical Novae ◽  
Giant Stars ◽  
Red Giant ◽  
Sydney Australia

In the triennium under review, from the late second half of 1987 to the early second half of 1990, Commission 29 has sponsored or cosponsored the following IAU Conferences: Coll. No. 106, “Evolution of Peculiar Red Giant Stars,” Bloomington, Indiana, July 1988; CoU. No. 114, “White Dwarfs,” Hanover, New Hamsphire, August 1988; Coll. No. 113, “Physics of Luminous Blue Variables,” Val Morin, Quebec, August 1988; Coll. No. 122, “Physics of Classical Novae,” Madrid, Spain, June 1989; Symp. No. 143, “Wolf-Rayet Stars and Interrelations with Other Massive Stars in Galaxies,” Denpasar, Indonesia, June 1990; Symp. No 148, “The Magellanic Clouds and their Dynamical Interaction with the Milky Way,” Sydney, Australia, July 1990; Symp. No. 145, “Evolution of Stars: the Photospheric Abundance Connection,” Druzba, Bulgaria. August 1990.

scholarly journals On the ionizing populations in GEHRs: unveiling integrated properties from the analysis of the Wolf-Rayet population

2003 ◽  
Vol 212 ◽  
pp. 698-699
Author(s):  
Marcelo Castellanos ◽  
Ángeles I. Díaz ◽  
Elena Terlevich
Keyword(s):  
Physical Properties ◽  
Emission Line ◽  
Massive Stars ◽  
Current Understanding ◽  
Evolutionary Synthesis ◽  
H Ii Regions ◽  
Expanding Atmospheres ◽  
Stars Evolution

In recent years, the detection of Wolf-Rayet stars in Giant Extragalactic H ii Regions (GEHRs) has yielded several questions about our current understanding of massive stars evolution and hot expanding atmospheres, the age of the ionizing populations and their impact onto the physical properties of GEHRs. Here, we present spectrophotometric observations of four extragalactic GEHRs which show WR features in their spectra. Our goal is to reproduce simultaneously the observed WR properties and the emission-line spectra with the help of current evolutionary synthesis models.

scholarly journals Core‐Collapse Very Massive Stars: Evolution, Explosion, and Nucleosynthesis of Population III 500–1000M⊙Stars

2006 ◽  
Vol 645 (2) ◽  
pp. 1352-1372 ◽  
Author(s):  
Takuya Ohkubo ◽  
Hideyuki Umeda ◽  
Keiichi Maeda ◽  
Ken’ichi Nomoto ◽  
Tomoharu Suzuki ◽  
...  
Keyword(s):  
Massive Stars ◽  
Core Collapse ◽  
Stars Evolution ◽  
Population Iii

scholarly journals The effect of rotation on RGB surface abundances

1997 ◽  
Vol 189 ◽  
pp. 349-354
Author(s):  
C. Charbonnel
Keyword(s):  
Stellar Evolution ◽  
Globular Cluster ◽  
Massive Stars ◽  
Observational Evidence ◽  
Evolution Theory ◽  
Mixing Processes ◽  
Giant Stars ◽  
The Subject ◽  
Abundance Anomalies ◽  
Chemical Anomalies

Pop II field and globular cluster giant stars (and, to a less extent, Pop I giants) exhibit chemical anomalies which are not predicted by standard stellar evolution theory. Two hypotheses have been proposed to explain these abundance variations, namely the primordial and the evolutionary explanations. A primordial origin for intracluster abundance anomalies (see e.g. Cottrel & Da Costa 1981) would be related to inhomogeneities in the cluster material due to pollution by a prior generation of massive stars. In the evolutionary hypothesis, abundance variations would be due to nuclear and mixing processes internal to the giant stars themselves. Many good reviews exist on the subject (see e.g. Briley et al. 1994a, Kraft 1994), in which observational evidence supporting both hypotheses are presented. In this conference, Da Costa recalls the most recent observational data, and some excellent poster contributions bring essential clues to the subject.

Very massive stars: Evolution with mass loss

1983 ◽  
Vol 93 (2) ◽  
pp. 313-345 ◽  
Author(s):  
Jaime Klapp
Keyword(s):  
Mass Loss ◽  
Massive Stars ◽  
Stars Evolution

Very massive stars: Evolution with mass loss

1984 ◽  
Vol 106 (2) ◽  
pp. 215-229 ◽  
Author(s):  
Jaime Klapp
Keyword(s):  
Mass Loss ◽  
Massive Stars ◽  
Stars Evolution

scholarly journals Code dependencies of pre-supernova evolution and nucleosynthesis in massive stars: evolution to the end of core helium burning

2015 ◽  
Vol 447 (4) ◽  
pp. 3115-3129 ◽  
Author(s):  
S. Jones ◽  
R. Hirschi ◽  
M. Pignatari ◽  
A. Heger ◽  
C. Georgy ◽  
...  
Keyword(s):  
Massive Stars ◽  
Helium Burning ◽  
Stars Evolution
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