During the course of their evolution, stars shed their outer layers and lose a significant fraction of their initial mass. Stars with masses of 8MSunor less can lose enough mass to become white dwarfs, which have masses less than the Chandrasekhar limit (about 1.4MSun). The pressure exerted ...
stars: pre-main sequencestars: evolutionstars: formationstars: interiorsstars: low-massHertzsprung-Russel and C-M diagramsstars: abundancesThe main characteristics of standard pre-main sequence (PMS) models are described. A discussion of the uncer- tainties affecting the current generation of PMS ...
Low‐Mass X‐Ray Binaries as the Source of the Very Soft X‐Ray Emission in the X‐Ray–faintest Early‐Type Galaxies 来自 IOP 喜欢 0 阅读量: 29 作者: JA Irwin 摘要: The X‐ray emission from the faintest X‐ray elliptical and ...
The vast majority of stars with mass similar to that of the Sun are expected to destroy lithium (Li) gradually over the course of their lives, via low-temperature nuclear burning. This has now been supported by observations of hundreds of thousands of red giant stars...
Low Mass X-ray Binaries As the Source of the Very Soft X-ray Emission in the X-ray Faintest Early-Type GalaxiesSTARS: BINARIES: CLOSEGALAXIES: ELLIPTICAL AND LENTICULARCDGALAXIES: ISMX-RAYS: GALAXIESX-RAYS: ISMX-RAYS: STARSStars: Binaries: Close...
CEMP-rs stars present most of the characteristics of extrinsic stars such as CEMP-s, CH, barium, and extrinsic S stars; they can be explained as being polluted by a low-mass, low-metallicity thermally-pulsing asymptotic giant branch (TP-AGB) companion experiencing i-process nucleosynthesis after...
2.Low mass, high structural stiffness and friction free viscous damping give excellent dynamic performance characteristics. 低质量, 高刚度和摩擦阻尼特性提供优良的动态性能无粘性. 3.High - mass stars emit ultraviolet and blue light, whereas low - mass stars emit yellow and red light. ...
The effects of mass loss on the evolution of low-mass stars (actual mass smaller than 1.4 M ⊙ ) are reviewed. The case of globular cluster stars is discussed in some detail, and it is shown that evolutionary theory sets quite precise limits to the mass-loss rate in population II red ...
Energy in stars is provided by nuclear reactions, which, in many cases, produce radioactive nuclei. When stable nuclei are irradiated by a flux of protons or neutrons, capture reactions push stable matter out of stability into the regime of unstable spec
Here, we summarize the general characteristics of the SLoWPoKES sample and present preliminary results describing the properties of wide, low-mass pairs. While the majority of the identified pairs are disk dwarfs, there are 70 halo subdwarf (SD) pairs and 21 white dwarf-disk dwarf pairs, as ...