Results 21 to 30 of about 3,286 (161)
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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Early Stages of Stellar Evolution [PDF]
Symposium - International Astronomical Union, 1977 A wealth of new observational data made available through the advent of modern infrared and microwave techniques, have provided astronomers with their first glimpses into the current-epoch stellar wombs - dark interstellar clouds. As a consequence, the past ten years have witnessed major advances in our understanding of the early evolution of stars and
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NGC 2362: A Template for Early Stellar Evolution
The Astrophysical Journal, 2001 9 pages, 3 figures, to be published in ...
Moitinho, A. +3 more
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FU Orionis eruptions and early stellar evolution [PDF]
Symposium - International Astronomical Union, 1990 The FU Orionis phenomenon has attracted increasing attention in recent years, and is now accepted as a crucial element in the early evolution of low mass stars. The general characteristics of FUors are outlined and individual members of the class are discussed. The discovery of a new FUor, BBW 76, is presented, together with a discussion of photometric
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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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Slow flares and eruptive phenomena in early stages of stellar evolution [PDF]
Symposium - International Astronomical Union, 1990 Correlations between different eruptive phenomena (fast and slow flares, large-scale eruptive variations up to fuor phenomenon) in stellar instability during stage of evolution are analysed A conclusion is drawn on the difference in natures of eruptive phenomena lasting some ten minutes and slower variations lasting more than one day.
M. A. Ibrahimov, V. S. Shevckenko
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Asteroseismology of High-Mass Stars: New Insights of Stellar Interiors With Space Telescopes
Frontiers in Astronomy and Space Sciences, 2020 Massive stars are important metal factories in the Universe. They have short and energetic lives, and many of them inevitably explode as a supernova and become a neutron star or black hole.
Dominic M. Bowman
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The Early Evolution of Dense Stellar Systems [PDF]
Proceedings of the International Astronomical Union, 2007 AbstractThe early evolution of dense stellar systems is dominated by the majority mass component – the gas – and so any credible modeling of the first Myr or so of a cluster's life inevitably involves hydrodynamical simulations. Such simulations have increased considerably in sophistication over the last few years and are now beginning to incorporate ...
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COSMIC EVOLUTION OF VIRIAL AND STELLAR MASS IN MASSIVE EARLY-TYPE GALAXIES [PDF]
The Astrophysical Journal, 2010 We measure the average mass properties of a sample of 41 strong gravitational lenses at moderate redshift (z ~ 0.4 - 0.9), and present the lens redshift for 6 of these galaxies for the first time. Using the techniques of strong and weak gravitational lensing on archival data obtained from the Hubble Space Telescope, we determine that the average mass ...
Lagattuta, David J. +9 more
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V410 Puppis: A useful laboratory for early stellar evolution
Monthly Notices of the Royal Astronomical Society, 2022 ABSTRACT New spectrometric (HERCULES) and ground-based multicolour photometric data on the multiple star V410 Puppis are combined with satellite photometry (HIPPARCOS and TESS), as well as historic astrometric observations. Absolute parameters for V410 Pup Aab are derived: MAa = 3.15 ± 0.10, MAb = 1.83 ± 0.08 (M⊙); RAa = 2.12 ± 0.10, RAb
Ahmet Erdem +8 more
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