Results 21 to 30 of about 3,775,717 (320)
The main sequence of star clusters [PDF]
Monthly Notices of the Royal Astronomical Society, 2008 16 pages, 21 figures, accepted for publication in ...
Kupper, Andreas H. W. +2 more
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XUE: Molecular Inventory in the Inner Region of an Extremely Irradiated Protoplanetary Disk
The Astrophysical Journal Letters, 2023 We present the first results of the eXtreme UV Environments (XUE) James Webb Space Telescope (JWST) program, which focuses on the characterization of planet-forming disks in massive star-forming regions.
María Claudia Ramírez-Tannus +26 more
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On the Relationship of the Degrees of Correspondence of Dialects and Distances
Languages, 2019 This study analyzes the relationship between the degrees of resemblance and distances between dialects based on several dialectological atlases. This analysis investigates various correspondence data with respect to total valid data in setting reference ...
Takuichiro Onishi
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The Pre-main Sequence: Challenges and Prospects for Asteroseismology
Frontiers in Astronomy and Space Sciences, 2022 Stars do not simply pop up on the main sequence. Before the stars arrive on the zero-age main sequence, they form in the collapses of molecular clouds, gain matter through accretion processes, and compress their cores until hydrogen can burn in full ...
Konstanze Zwintz, Thomas Steindl
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About time of hydrogen burning in stellar entrails. New formulas for approximation
Вісник Астрономічної школи, 2017 The relationship between the duration of nuclear reactions and initial mass of the star is an important component a wide variety of astrophysical problems.
V. A. Zakhozhay, S. I. Zabuga
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Walkaway Star Candidates in IC 348 and Their Possible Birthplaces
The Astrophysical Journal, 2023 Observations and theories reveal that star-forming regions eject their members during the early evolution of the cluster. We present an initial search for stars ejected from the young cluster IC 348 based on an analysis of Gaia EDR3 astrometry of ...
Xingyu Zhou +4 more
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Duplicity on the main sequence [PDF]
Astrophysics and Space Science, 1984 AbstractA review paper or a lecture like the following one, will best serve ‘its’ conference by giving an overview of the basic facts, and an impartial review of current debates, also by trying to point out some apparently crucial questions whose solutions, we hope, will determine the line of future research.Because these stars are essentially ...
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Frontiers in Astronomy and Space Sciences, 2021 Theoretical prediction of surface stellar abundances of light elements–lithium, beryllium, and boron–represents one of the most interesting open problems in astrophysics.
E. Tognelli +14 more
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Boron Abundances in Main Sequence B-type Stars: A Test of Rotational Depletion during Main Sequence Evolution [PDF]
, 2001 Boron abundances have been derived for seven main sequence B-type stars from HST STIS spectra around the B III 2066 A line. In two stars, boron appears to be undepleted with respect to the presumed initial abundance.
A. M. Brooks +29 more
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The End of the Main Sequence [PDF]
The Astrophysical Journal, 1997 We present stellar evolution calculations for the lowest mass stars, i.e., those stars with masses in the range 0.08 M☉ ≤ M* ≤ 0.25 M☉. Our particular emphasis is on the post-main-sequence evolution of these objects. We establish a hydrogen-burning timescale of τH ~ 1.0 × 1013 years for the minimum-mass main-sequence star. This timescale determines the
Gregory Laughlin +2 more
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