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The Transition from Population III to Population II Stars [PDF]
The Astrophysical Journal, 2004 4 pages, 2 figures.
Fang, Taotao, Cen, Renyue
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Cosmic reionization by stellar sources: Population II stars [PDF]
Monthly Notices of the Royal Astronomical Society, 2003 We study the reionisation of the Universe by stellar sources using a numerical approach that combines fast 3D radiative transfer calculations with high resolution hydrodynamical simulations. Ionising fluxes for the sources are derived from intrinsic star formation rates computed in the underlying hydrodynamical simulations.
Sokasian, Aaron +3 more
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CRITICAL METALLICITY FOR POPULATION II STARS
Odessa Astronomical Publications, 2008 We present simple arguments about metallicity of transition from first stellar generation (population III) to the second one. We consider the efficiency of fragmentation in gas induced by thermal instability in cold gas layers and filaments (T < 104 K ...
E. O. Vasiliev, Yu. A. Shchekinov
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Radial velocities of Population II stars. II
Open Astronomy, 1999 Bartkevičius A., Sperauskas J.
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The Possible Signs of Hydrogen and Helium Accretion from Interstellar Medium on the Atmospheres of F-K Giants in the Local Region of the Galaxy [PDF]
Journal of Astronomy and Space Sciences, 2021 The dependencies of the chemical element abundances in stellar atmospheres with respect to solar abundances on the second ionization potentials of the same elements were investigated using the published stellar abundance patterns for 1,149 G and K ...
Alexander Yushchenko +8 more
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Radial Velocities of Population II Stars. I.
Open Astronomy, 1992 Bartkevičius A. +3 more
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Anomalous Cepheids discovered in a sample of galactic short period Type II Cepheids [PDF]
Serbian Astronomical Journal, 2018 We revisited the short period Type II Cepheids (T2Cs), called the BL Herculis (BLHs), in the Galactic Field to derive a homogeneous analysis of their Fourier parameters.
Jurković M.I.
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Hypervelocity Stars. II. The Bound Population [PDF]
The Astrophysical Journal, 2007 Hypervelocity stars (HVSs) are stars ejected completely out of the Milky Way by three-body interactions with the massive black hole in the Galactic center. We describe 643 new spectroscopic observations from our targeted survey for HVSs. We find a significant (3.5 sigma) excess of B-type stars with large velocities +27510 kpc that are most plausibly ...
Brown, Warren R. +4 more
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Lithium 6104 Å in Population II stars [PDF]
Astronomy & Astrophysics, 2002 We have obtained echelle spectroscopy of 14 Population II objects selected from those previously observed by Bonifacio & Molaro (1997). For one object, HD 140283, we obtained exquisite data with the High Dispersion Spectrograph on the Subaru Telescope, with S/N exceeding 1000 per 0.018A pixel.
Ford, A. +7 more
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