Results 31 to 40 of about 472,116 (331)
The strange hot horizontal-branch binary star in NGC 6752
Open Astronomy, 2018 M5865 is the only so-far confirmed close binary found in the extreme horizontal branch (EHB) of a globular cluster. A detailed study has recently proposed that this object could be a close system (period P=1.61 days) comprising a EHB and a main-sequence ...
Bidin Christian Moni
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Horizontal Branch A- and B-type Stars in Globular Clusters [PDF]
, 2004 Globular clusters offer ideal laboratories to test the predictions of stellar evolution. When doing so with spectroscopic analyses during the 1990s, however, the parameters we derived for hot horizontal branch stars deviated systematically from ...
Moehler, S.
core +1 more source
A new calibration for the Blue Horizontal Branch [PDF]
Monthly Notices of the Royal Astronomical Society, 2013 We suggest a simple analytic approximation for magnitudes and hence distances of Blue Horizontal Branch (BHB) stars in Sloan colours. Precedent formulations do not offer a simple closed formula, nor do they cover the full dependences, e.g. on metallicity.
Ralph Schönrich, Francesco Fermani
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The Origin of Extreme Horizontal Branch Stars [PDF]
The Astrophysical Journal, 1996 Strong mass loss on the red giant branch (RGB) can result in the formation of extreme horizontal branch (EHB) stars. The EHB stars spend most of their He core and shell burning phase at high temperatures and produce copious ultraviolet flux. They have very small hydrogen envelopes and occupy a small range in mass.
Robert W. O'Connell +3 more
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Multi-objective design and optimization of squeezed branch pile based on orthogonal test
Scientific Reports, 2023 In recent years, the emergence of the squeezed branch pile has presented a new avenue for civil engineering, offering a distinctive structure and favorable mechanical characteristics.
Ziqi Wang, Cunbao Zhao, Wenyue Zhang
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Revista Brasileira de Ortopedia, 2014 Objective:To describe the path of the infrapatellar branch of the saphenous nerve (IBSN) using the medial joint line, anterior tibial tuberosity (ATT), tibial collateral ligament and a horizontal line parallel to the medial joint line that passes over ...
Julio Cesar Gali +6 more
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Pulsational instabilities in hot pre-horizontal branch stars
EPJ Web of Conferences, 2017 The ϵ mechanism is a self-excitation mechanism of pulsations which acts on the regions where nuclear burning takes place. It has been shown that the ϵ mechanism can excite pulsations in models of hot helium-core flash, and that the pulsations of LS IV-14·
Battich Tiara +3 more
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Meikuang Anquan, 2022 The branch hole is the key to ensure the long-distance drilling of directional hole along the target stratum, improve the coverage of directional drilling and accurately explore geological abnormal bodies.
FANG Jun
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Gaps in the blue horizontal branch.
The Astrophysical Journal, 1976 Data leads to the conclusion that several distinct groups of stars exist on the field stars horizontal branch sequence. Consideration of current understanding of the advanced evolution of Population II stars indicates that, if Greenstein's (1971) ''extended horizontal-branch'' hypothesis is correct, these discrete horizontal-branch groups correspond to
J.A. Graham, B. Newell
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Discovery of Blue Hook Stars in the Massive Globular Cluster M54
, 2003 We present BV photometry centered on the globular cluster M54 (NGC 6715). The color-magnitude diagram clearly shows a blue horizontal branch extending anomalously beyond the zero age horizontal branch theoretical models.
Alejandra Recio‐Blanco +7 more
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