This paper compiled a new and much complete sample for G and F dwarf stars within 25 pc of the Sun.
收集了一个新的较为完备的太阳附近25pc内的F，G矮星样本，利用最新的窄带测光资料和定标关系导出了148颗F矮星和382颗G矮星的金属含量的分布，讨论了对银河系化学演化的意义。
An Attractive Topic—Brown Dwarf research;
一个引人注目的课题——褐矮星研究
It is then referred to as a White Dwarf.
这时，它被称为白矮星。
Do you know about the white dwarfs?
你对白矮星有所了解吗?
They said they found thirty-eight objects called @white dwarfs@.
他们发现了38个被叫做“白矮星”的物体。
The researchers suggest that there are many white dwarf stars throughout this halo.
研究人员猜想，光晕内到处有白矮星。
White dwarfs provide an important beginning for understanding the material in this chapter.
白矮星是掌握本章材料的重要出发点。
A third inconsistency has to do with the number of dwarf galaxies.
第三项矛盾与矮星系的数目有关。
As a slowly contracting dwarf the star may remain luminous for billions of years.
收缩较慢的白矮星仍会发光几十亿年。
Quasars or dwarf galaxies would scatter the elements more unevenly.
类星体或矮星系可使这些元素散布得更不平均。
Each white dwarf is a burned up, dying star like the sun.
每个白矮星都是类似于太阳燃烬后残存的恒星，
( Dwarf novae, explosions of light from the accretion disk around a white dwarf in a binary system, are examples of this phenomenon.
在双星系统中，环绕白矮星的吸积盘产生光爆而造成的矮新星，就是此现象的例子。
A few stars on the road to dwarfhood flare up briefly from time to time.
有些星星在演变为白矮星的过程中，不时地隐隐闪烁。
Whereas the ejection scenario does predict that brown dwarf disks should be truncated, it is still possible for ejected dwarfs to retain a small disk.
虽然排斥说的确预言棕矮星的气盘应被截断，但被排斥逐出的矮星仍有可能保留著小型气盘。
Mister Oppenheimer says most of the white dwarfs may be about ten-thousand-million years old.
奥本海姆先生说，大多数白矮星大约有100亿岁。
Observations might also catch brown dwarfs in the very act of forming.
观测时也可能会逮到正处于形成阶段的棕矮星。
What is left after an explosion is a dwarf star of extraordinary density.
爆炸后所留下的是一个密度巨大的矮星。
Ben Oppenheimer led the research team that discovered the white dwarfs.
本?奥本海姆领导发现这些白矮星的研究小组。
These newly discovered white dwarfs are said to be about four-hundred-fifty light years from Earth.
这些新发现的白矮星，据说距地球约450光年，
Nearly12.5 million light-years away in the dwarf galaxy NGC4449, a veritable stellar" fireworks" is on display.
在近1.25亿光年远的矮星系NGC4449中，正在展现一场真正的恒星“烟火”。
