n. 组成; 形成; 组成物; 形成物; 编队; 队形 牛津词典 noun 组成；形成the action of forming sth; the process of being formedthe formation of a new government组成新政府evidence of recent star formation in the galaxy银河系新恒星形成的证据组成物；形成物a thing that has ...
Star formation at a rate of more than 15 solar masses a year has been observed inside a massive outflow of gas from a nearby galaxy; this could also be happening inside other galactic outflows. Massive, galactic-scale outflows of molecular gas with the p
This model has recently been modified to include a ubiquitous mode of fragmentation in the protostellar disks, such that the typical outcome of primordial star formation may be the formation of a binary or small multiple stellar system. We will also discuss extensions to this standard picture due...
Collapse and Formation of Stars. Reports on the modeling of star collapse and formation on high-speed computers. Early stages in the formation of a star; Use of increasingly realistic des... Boss,Alan,P. - 《Scientific American》 被引量: 0发表: 1985年 ...
of the young star in the Hertzsprung-Russell diagram follows the Henyey track11. Further contraction then leads the stellar core to burn the initially present12C into14N via the first parts of the CNO cycle (12C(p, γ)13N(β+, ν)13C(p, γ)14N), which is a chain of ...
1 solar mass or less.一个太阳质量的恒星结构基本都这样 SunStellar Models恒星模型The structure and evolution of a star is determined by the laws of恒星的结构和演化由下面的物理规律决定 流体静态平衡 能量传输 质量守恒 能量守恒一个恒星的质量(和化学组成)完全决定了它的性质。Thats why stars initially ...
A fundamental quest of modern astronomy is to locate the earliest galaxies and study how they influenced the intergalactic medium a few hundred million years after the Big Bang1,2,3. The abundance of star-forming galaxies is known to decline4,5 from redshifts of about 6 to 10, but a key...
We compare Spitzer Infrared Spectrograph observations of SQ-A & SQ-B in Stephan's Quintet, Ambartzumian's knot in Arp 105, Arp 242-N3, Arp 87-N1, a bridge star forming region, NGC 5291 N and NGC 5291 S. The PAHs tend to be mainly neutral grains with a typical size of 50 - 100...
Large area surveys with a high number of galaxies observed have undoubtedly marked a milestone in the understanding of several properties of galaxies, such as star-formation history, morphology, and metallicity. However, in many cases, these surveys provide fluxes from fixed small apertures (e.g....
A. et al. The origin of the mass–metallicity relation: insights from 53,000 star-forming galaxies in the Sloan Digital Sky Survey. Astrophys. J. 613, 898–913 (2004). Article ADS Google Scholar Noeske, K. G. et al. Star formation in AEGIS field galaxies since z = 1.1: the ...