hauteur
发表于 2025-3-30 09:45:01
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描述
发表于 2025-3-30 14:34:34
UV Excess and AGB Evolution in Elliptical-Galaxy Stellar Populations, contributors to galaxy ultraviolet luminosity excess. While a blue HB morphology seems a natural characteristic of metal-poor stellar populations, its appearance in metal-rich systems, often coupled with a poorer rate of planetary nebulae per unit galaxy luminosity, might be calling for an intimate
ear-canal
发表于 2025-3-30 17:21:33
Binary Stars as the Source of the Far-UV Excess in Elliptical Galaxies,at this UV excess is caused by an old population of hot helium-burning stars without large hydrogen-rich envelopes rather than young stars, their origin has remained a mystery. Here we show that these stars most likely lost their envelopes because of binary interactions, similar to the hot subdwarf
Mystic
发表于 2025-3-31 00:24:35
,Stellar Populations in Field Early–Type Galaxies,tudy from ultraviolet (UV) to infrared (IR) of a sample 65 nearby ETGs. We derived Lick line-strength indices at different galacto-centric distances from the optical spectra (3700-7000 Å), and extracted ages, metallicites and element abundance ratios for the galaxies by comparison of the indices wit
resuscitation
发表于 2025-3-31 03:35:42
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钱财
发表于 2025-3-31 07:34:49
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大喘气
发表于 2025-3-31 10:51:13
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无王时期,
发表于 2025-3-31 16:23:19
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LINE
发表于 2025-3-31 20:09:10
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correspondent
发表于 2025-3-31 21:49:27
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