Results 181 to 190 of about 11,734 (199)

A binary merger product as the direct progenitor of a Type II-P supernova

Niu* Z, Sun* N, Zapartas* E, Souropanis D, Cui Y, Maund JR, Andrews JJ, Briel MM, Fraser M, Gossage S, Kruckow MU, Liotine C, Liu Z, Srivas PM, Teng E, Wang X, Yang Y, Liu J.   +17 more
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An Abrupt Change in the Disk Fraction of Free-Floating Planets at the Deuterium-Burning Ignition Limit

Rodrigues T, Bouy H, Raymond S, Martín E, Bertin E, Romero JO, Barrado D, Huélamo N, Tamura M, Roig NM, Galli P, Cuillandre J.   +11 more
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Extended hot dust emission around the earliest massive quiescent galaxy

Ji Z, Williams C, Rieke G, Lyu J, Alberts S, Sun F, Helton J, Rieke M, Shivaei I, D'Eugenio F, Tacchella S, Robertson B, Zhu Y, Maiolino R, Bunker A, Sun Y, Willmer C.   +16 more
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The local stellar population

European Journal of Physics, 2003
We describe an undergraduate experiment that can be used to place the Sun in context with the properties of our nearest stellar neighbours. Using stars selected on the basis of their trigonometric parallaxes and spreadsheet software, the Hertzsprung–Russell diagram and luminosity function are constructed for stars within 16 pc, showing that the Sun is ...
K. H. Elliott, R. D. Jeffries
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On the local stellar populations

Monthly Notices of the Royal Astronomical Society, 2016
We present a study of the local stellar populations from a volume-complete all-sky survey of the about 500 bright stars with distances less than 25 pc and down to main-sequence effective temperatures T-eff >= 5300 K. The sample is dominated by a 93 per cent fraction of Population I stars, only 22 sources (5 per cent) are Population II stars, and 9 ...
Rolf Chini, Rolf Chini, Zhiwei Chen, Zhiwei Chen, Lena Kaderhandt, Klaus Fuhrmann   +5 more
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Summary on stellar populations

Proceedings of the International Astronomical Union, 2005
ELTs will bring galaxies within 5 Mpc or more “as close as the Magellanic Clouds”. This is why stellar populations is such an exciting subject for ELTs. We can resolve galaxies into stars and learn their history (1) from the “fossil record” of old stars and (2) looking back in time. The confrontation of these two views will bring important new insights
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Stellar Evolution and Stellar Populations in Galaxies

1992
Models of population synthesis are resting on an ensemble of other models, data and assumptions, in particular the models of stellar evolution, the data on initial compositions, the data on stellar spectra, the initial mass function (IMF), the star formation rate (SFR), the infall rate, etc… Here we shall concentrate on the properties of stellar models
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Stellar Populations and Mergers

1990
Our Galaxy has four stellar populations: the disk, the thick disk, the bulge, and the halo. Did they form out of a single proto-Galactic nebula, with each population being but a different stage in the process? Or have at least some of them nothing to do with the origins and evolution of the others, as expected from mergers?
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