Results 121 to 130 of about 1,072 (156)
Metabolic Profiling Analysis of Cytochrome B5 Production in E. Coli N4830-1 Using GC-MS
Tengsuttiwat T +5 more
europepmc +1 more source
The Evolution of Helium-Rich Subdwarf-B Stars [PDF]
Astrophysics and Space Science, 2004 Helium-rich subdwarf-B (He-sdB) stars are extremely rare hot subluminous stars found in the field of our Galaxy as well as in some globular clusters. The existence of these hot helium stars cannot be explained by canonical stellar evolution theories nor can it be explained by normal sdB evolution.
C S Jeffery
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The Quasar 0805+046 as a Helium-Rich Shell Star [PDF]
Astrophysics and Space Science, 1985 Within the framework of the plasma-laser star model of quasars it is proposed that the quasar 0805+046 is a helium-rich shell star. (a) The strong emission line at 4712 A is identified with Hei λ4713. (b) The discontinuity in the continuous energy distribution at λ3420 is identified with the helium discontinuity at λ3422.
Y P Varshni
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A Massive Star Origin for an Unusual Helium-Rich Supernova in an Elliptical Galaxy [PDF]
Nature, 2010 Accepted by Nature (24 March 2010), 32 pages including Supplementary ...
Koji S Kawabata +2 more
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A New Helium-Rich Star, BD +13°3224
Publications of the Astronomical Society of the Pacific, 1963Jesse L Greenstein
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HD 96446: A Helium-Rich B-Type Star
Publications of the Astronomical Society of the Pacific, 1959Mercedes Jaschek, Carlos Jaschek
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Helium rich stars produce the UV upturn
Proceedings of the International Astronomical Union, 2019AbstractWe measure the evolution of the UV upturn color for galaxies on the red sequence in clusters at 0 < z < 0.7 and to luminosity levels L ∼ L*. We show that the UV upturn color does not change until at least z = 0.55 but becomes significantly redder at z = 0.7. This is the first detection of evolution in the UV upturn.
R. De Propris +3 more
openaire +1 more source
Full Evolutionary Models for PG 1159 Stars. Implications for the Helium-Rich O(He) Stars [PDF]
Astronomy and Astrophysics, 2006 11 pages, 9 figures. Accepted for publication in A&A (slightly modified version)
Leandro G Althaus, M M Miller Bertolami
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Analysis of IUE Spectra of Helium-Rich White Dwarf Stars [PDF]
Astronomy and Astrophysics, 2006 8 pages, 5 ...
Gerald Handler +2 more
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