upper main sequence 上主星序 initial main sequence 初始主序 main program sequence 主要程序步骤 zerorotation main sequence 无自转主序 相似单词 main n.[C] 1.(通往建筑物的)主管道,总管,输电干线 2.(建筑物的)污水总管道 3.水源,煤气源,电源,(水、煤气、电等的)供应系统,下水道系统 a. 主要...
We present a spectral atlas of the post-main-sequence population of the most\nmassive Galactic globular cluster, omega Centauri. Spectra were obtained of\nmore than 1500 stars selected as uniformly as possible from across the (B, B-V)\ncolour-magnitude diagram of the proper motion cluster ...
Late in their evolution, massive stars may undergo periods of violent instability and mass loss, but the mechanism responsible for these episodes has not been identified. We study one potential contributor: the development of local radiation-driven instabilities in the outer layers of main sequence ...
Furthermore, massive planets around post-main-sequence stars could accrete a non-negligible amount of material from the enhanced stellar winds, thereby significantly altering their atmospheric chemistry as well as causing a significant accretion luminosity during the epochs of most intense stellar mass ...
Context. Many galactic B[e] stars suffer from improper distance determinations, which make it difficult to distinguish between a pre- and post-main sequence evolutionary phase on the basis of luminosity arguments. In addition, these stars have opaque circumstellar material, obscuring the central star...
Globular ClustersHubble Space TelescopeStellar CoresCamerasPoint Spread FunctionsAccurate photometry for individual post-main-sequence stars in the core of the ... Guhathakurta,Puragra,Yanny,... - 《Astronomical Journal》 被引量: 232发表: 1992年 Kinematic Decoupling of Globular Clusters with the Exten...
The chemical evolution of galaxies is governed by the chemical yields from stars, and here we focus on the important contributions from asymptotic giant branch (AGB) stars. AGB nucleosynthesis is, however, still riddled with complexities. Observations from post-asymptotic giant branch (post-AGB) sta...
32 — Post Main-Sequence Evolution [Revision : 1.1]• Shell Ignition– Shortly before hydrogen exhaustion in center of stars above ∼ 1.1M?, energy producedby core is insufficient to match luminosity radiated by envelope– Typically occurs when X ≈ 0.05– Kelvin-Helmholtz contraction makes up...
Serving as a spin-off sequel toThe Batman(2022), the limited seriesThe Penguinfollows Oswald “Oz” Cobb’s rise to power in Gotham City’s criminal underworld. Reprising his role fromThe Batman,Colin Farrell stars as the Penguin, which involved a dramatic transformation including bodysuits, pr...
Stars: Raúl Méndez, Humberto Busto, Erick Trinidad Camacho, Magda Brugengheim, Santiago Mendoza Cortes, Nailea Norvind | Written and Directed by Isaac EzbanMy initiation into Sci-Fi London looked like it was going to tick all the boxes for me: time-twisting premise; Primer-esque allusions ...