Results 11 to 20 of about 1,859,132 (364)
On constructing horizontal branch models [PDF]
Astronomy & Astrophysics, 2005 We investigate different methods used to construct (zero-age) horizontal branch models and compare the resulting horizontal branch evolution with that of models resulting from the calculation of the complete stellar evolution from the main sequence and through the core helium flash.
Achim Weiss, Aldo Serenelli
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MORGOTH: incorporating horizontal branch modelling into star formation history determinations [PDF]
Monthly notices of the Royal Astronomical Society, 2018 We present a new method that incorporates the horizontal branch morphology into synthetic colour-magnitude diagram based star formation history determinations.
A. Savino +3 more
semanticscholar +2 more sources
The ages of stars: The horizontal branch [PDF]
Proceedings of the International Astronomical Union, 2008 AbstractHorizontal branch (HB) stars play a particularly important role in the “age debate,” since they are at the very center of the long-standing “second parameter” problem. In this review, I discuss some recent progress in our understanding of the nature and origin of HB stars.
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On the red giant branch mass loss in 47 Tucanae: Constraints from the horizontal branch morphology [PDF]
, 2016 We obtain stringent constraints on the actual efficiency of mass loss for red giant branch stars in the Galactic globular cluster 47 Tuc, by comparing synthetic modeling based on stellar evolution tracks with the observed distribution of stars along the ...
M. Salaris, S. Cassisi, A. Pietrinferni
semanticscholar +2 more sources
Inclusion of horizontal branch stars in the derivation of star formation histories of dwarf galaxies: The Carina dSph [PDF]
A&A 583, A126 (2015), 2015 We present a detailed analysis of the horizontal branch of the Carina dwarf spheroidal galaxy by means of synthetic modelling techniques, taking consistently into account the star formation history and metallicity evolution as determined from main ...
A. Savino +5 more
semanticscholar +2 more sources
Effects of tidally enhanced stellar wind on the horizontal branch morphology of globular clusters [PDF]
, 2012 Context. Metallicity is the first parameter to influence the horizontal branch (HB) morphology of globular clusters (GCs). It has been found, however, that some other parameters may also play an important role in affecting the morphology.
Z. Lei +3 more
semanticscholar +2 more sources
Evaporation of Jupiter‐like planets orbiting extreme horizontal branch stars [PDF]
, 2011 We study the evaporation of planets orbiting close to hot (extreme) horizontal branch (EHB) stars. These planets survived the common envelope phase inside the envelope of the red giant star progenitor.
Ealeal Bear, N. Soker
semanticscholar +2 more sources
Why hot horizontal branch stars can appear redder than red giants [PDF]
Astron.Astrophys. 407 (2003) 303-310, 2003 In this paper we report on a curious feature in the V, (U-B) color-magnitude diagrams of globular clusters. In our database, we find that a considerable fraction of blue horizontal branch stars, hotter than the instability strip and cooler than the Grundahl et al.
Y. Momany +6 more
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Blue horizontal branch stars in metal-rich globular clusters. I. NGC 6388 and NGC 6441 [PDF]
arXiv, 1999 We report the first results of an ongoing spectroscopic survey of blue horizontal branch stars in the metal-rich ([Fe/H] ~ -0.5) globular clusters NGC 6388 and NGC 6441. Based on data obtained with the ESO-New Technology Telescope (NTT), we provide gravities and temperatures for four stars in NGC 6388 and three stars in NGC 6441.
S. Moehler, A. V. Sweigart, M. Catelan
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Meikuang Anquan, 2021 This paper takes the multi-branch horizontal grouting well reinforced with limestone on the corresponding floor L8 in the 15011 coal seam working face of Zhaogu No.1 Mine as the research object.
LIU Xiugang +3 more
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