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Accretion of Heavy Elements on Population II Stars
Publications of the Astronomical Society of Japan, 1957Abstract The effect of accretion of heavy elements on spectral appearance of population II stars, especially of globular cluster stars, are investigated in detail. It is shown to be implausible to explain the existence of these heavy elements by the accretion from outside.
Hisao Takebe, Naoyuki Matsunami
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The Cepheids of Population II and Related Stars
Publications of the Astronomical Society of the Pacific, 2002The Type II Cepheids include most intrinsic variables with periods between 1 and about 50 days, except for the classical Cepheids and the shortest semiregular variables of type M. The Type II Cepheids may be divided in groups by period, such that the stars with periods beween 1 and 5 days (BL Her class), 10-20 days (W Vir class), and greater than 20 ...
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Spectra of Population II Cepheid Variable Stars
1958The physical properties of the population II cepheids have been studied using the following material: photoelectric observations of Arp, low dispersion spectra of Joy, high dispersion spectra taken by Sanford and Abt, and numerous moderate dispersion spectra obtained by the author. Radial velocity curves for ten cepheids are shown.
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A B-type Star of Population II
Publications of the Astronomical Society of the Pacific, 1954Jesse L. Greenstein, James Cuffey
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Explosive scenario of the origin of population II stars
Astrophysics, 1989I. G. Kovalenko, Yu. A. Shchekinov
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