There are two main theories concerning massive star formation, accretion and merger.
文章简要叙述了有关大质量恒星形成的理论以及相关观测证据。
However, for massive star formation there still exist many indefinite factors.
恒星形成于分子云环境中。
Major improvement has been made in the studies of interstellar molecular clouds and star formation.
一方面是星际分子云与恒星形成的天文研究取得了令人瞩目的成就 。
By comparing the physical parameters of cluster and field galaxies,such as concentration index,specific star formation rate,stellar mass,and metallicity,the star formation properties of galaxies within different gravitational environments are studied.
通过对团星系和场星系的聚度参数、特征恒星形成率、星系中包含的恒星质量、金属丰度等物理参量的比较,研究了处在不同引力环境中星系的恒星形成性质。
The current star formation rates (SFRs) of galaxies and the variation with morphology environment and some physical properties of galaxies are crucial in our understanding of the evolution of galaxies.
基于越来越先进的观测技术，测量星系中的恒星形成率的精度也越来越高，尤其是近年来大规模的Sloan巡天(the Sloan Digital Sky Survey，简称SDSS)使得星系的样本不断的扩大，从而使得星系的恒星形成性质方面的研究也取得了很大的进展。
Moreover, the factors which have impacted on IGIMF are also studied, such as the embedded star cluster mass function (ECMF), the galactic total star formation rate (SFR) and the stellar initial mass function (IMF) in galactic clusters.
此外,研究还表明,星系内星团的质量分布函数(ECMF)形式、星系的总恒星形成率(SFR)及星系中星团的恒星初始质量函数形式等因素对星系的累积恒星初始质量函数都具有一定的影响。
Our aims are to study the oxygen abundance of the star-forming galaxies , to study the estimating methods and the calibration relations.
本论文主要研究了恒星形成星系的氧丰度,测量方法以及定标关系。
TENDENCY TO CLUSTER IN MASSIVE STAR FORMATION
大质量恒星形成时的成团倾向(英)
These stars form a group, the shape of which is rather like the shape of a watch.
这些恒星形成了一个星群，它的形状很像手表。
Spectral Line Observations of Massive Star Forming Regions and Circumstellar SiO Maser;
大质量恒星形成区和恒星SiO脉泽的谱线观测研究
The Trifid Nebula itself represents the final phase of star formation.
三叶星云本身代表着恒星形成的最后阶段。
Near-infrared Polarimetry in Study of Star Formation Regions
近红外偏振观测在恒星形成研究中的应用
This unusual explosive and intense star formation activity qualifies as a starburst.
这种不寻常的爆发和剧烈的恒星形成活动有星暴的资格。
Once the redshifts of the galaxies have been measured, we can begin to reconstruct the history of star formation.
一旦测得星系的红移，我们便可开始重建恒星形成的历史了。
3 the cloud from which a star is formed contains enough molecules to form numerous stars.
形成一颗恒星的星云内含有足以形成无数恒星的分子。
This is triggering a second stage of new star formation.
由此触发了第二阶段新恒星的形成。
Stars are born from a kind of primal soup known as the interstellar medium.
恒星是由一种称为星际介质的“原汤”形成的。
The starts were formed from gases that originally permeated the whole galaxy.
恒星是由原来遍及于整个星系内的气体所形成。
Accretion Disk and Angular Momentum Loss During Formation of a Star in the Nebular Disk
吸积盘与恒星在星云盘中形成时的角动量损失
The Collapse of the Molecular Cloud Core in the Formation of the Star and Planet;
恒星与行星的形成过程中的分子云核坍塌
Thick clouds of interstellar gas absorb most of the light and screen other stars from us.
恒星间气体所形成的厚云层，吸收大部分的光，并遮住其他星星。
New stars continued to come into being from the gas clouds of the disk.
新的恒星继续从圆盘中的气体云中形成。
A star is formed when a cloud of gas collapses from the interstellar medium toward high density.
一个气体云自星际物质中坍缩，密度达到很高时，即形成了一个恒星。
The stars in each given cluster presumably were formed almost simultaneously.
大体上说，每个给定星团中的恒星差不多是同时形成的。
At the current epoch in galactic history, star formation appears to take place in dark-cloud complexes.
在星系发展的现阶段，恒星的形成看来是在暗云复合体内进行的。