| 释义 |
metallicity 英mɪtæ'lɪsɪtɪ美mɪtæ'lɪsɪtɪ 高COCA⁹²²⁵²BNC¹⁴⁴⁶⁶⁴⁺³iWeb⁵⁴⁸⁶²Economist³⁴³¹⁸⁺³
基本例句
n.金属性¹⁰⁰
A historic progress on recent studies of whether there is a possible age- metallicity relation of stars in the Galactic disk, especially in the Galactic thick disk, is reviewed in some details.
对太阳邻域内银河系盘星、特别是厚盘恒星年龄-金属度关系的研究进展作了较为详细的回顾和评述； cnki
The absolute magnitudes in I and K bands of 58 red clump giants are computed and the relation between them and the metallicity are also showed.
计算了共58颗红团簇巨星在 I、 K波段的绝对星等，讨论了它们与恒星铁丰度之间的关系。 cnki
“ The galaxy has a very, very steep metallicity gradient,” she says.
这个星系有着一个很大的丰度梯度。 yeeyan
Because stars congregate at a galaxy's centre, the metallicity in most nearby spirals is greatest there and drops toward the edge.
因为恒星聚集在星系的中心，其附近的金属丰度最高并沿边缘方向逐渐降低。 yeeyan
Because we see the galaxy when it was young, this result suggests spiral discs start off with steep metallicity gradients.
因为我们看到的它还处于早期，这个结果表明螺旋星系主盘开始时有着很大的金属丰度梯度。 yeeyan
Benson says that the steep metallicity gradient agrees with the long-standing but unconfirmed idea that spiral galaxies form their discs of stars from the inside out.
Benson说，这个高梯度的结果与一个久已有之但一直未被证实的想法相符，这个想法就是螺旋星系的恒星主盘是由内而外形成的。 yeeyan
Different theories predict how this metallicity gradient changes over billions of years.
已有几种不同的理论对金属丰度梯度在亿万年间如何变化作了推测。 yeeyan
However, because few stars form on the disc's outskirts, the metallicity there stays low.
然而，因为主盘外围只有少量恒星，那里的金属丰度比较低。 yeeyan
If astronomers could observe metallicity gradients in spiral galaxies billions of light- years away, we could see how steep the gradients were billions of years ago and thus how they change over time.
如果天文学家能够观测到十亿光年外的螺旋星云的金属丰度梯度，我们就可以知道亿万年之前的梯度有多大，因此也就可以知道它是如何随时间变化的。 yeeyan
In addition, last year other astronomers reported a steep metallicity gradient in an even farther galaxy, but that galaxy is not a spiral, so its relevance to the Milky Way is less clear.
另外，去年有其他天文学家报告称在一个更远的星系中发现了较大的金属丰度梯度，但那个星系不是螺旋星系，所以它与银河系的关系就没有那么明确了。 yeeyan
In this thesis, we study the relation between the critical accretion rate and the metallicity via AGB stars approach.
在本文中我们通过 AGB星研究了此临界吸积率和金属丰度之间的关系。 cnki
In this model, a mass of gas collapses and creates lots of stars at the disc's centre, where the stars quickly boost the metallicity.
在这个模型下，一大团气体坍缩并在主盘中心形成大量恒星，它们在那里迅速增加着金属丰度。 yeeyan
It is known that solar- type stars with high metallicity have a high probability of hosting planets.
因此，高金属性的类太阳恒星很有可能被行星绕转。 www.astronomy.com.cn
One clue comes from the metallicity of the disc’s constituent stars.
一条线索来自于主盘内恒星的金属丰度。 yeeyan
The results show that the metallicity and ferromagnetism of the Co and Ni clusters are independent of the cluster sizes.
计算结果显示，钴、镍团簇的金属性和铁磁性不随团簇大小改变。 cnki
The metallicity distribution of G dwarfs in the solar neighborhood is one of the important constraints on models of the chemical evolution of the Galactic disk.
太阳附近 G矮星金属丰度分布函数是目前银河系化学演化模型的最严格的观测约束之一。 cnki
Then, over billions of years, stars develop in the outer regions, raising the metallicity there and flattening the gradient.
随后，在亿万年间，恒星发展到外部趋于，提高了外围的金属丰度，因而使得梯度降低了。 yeeyan
Three generations of stars may exist based on metallicity.
以金属度划分，恒星有三个世代。 yeeyan
Thus, the disc begins its existence with a steep metallicity gradient, like the one in the distant galaxy in Leo.
因此，主盘在形成伊始有一个很大的丰度梯度，就像遥远的狮子座里的那个星系那样。 yeeyan
Yuan and colleagues used the giant Keck II telescope atop Mauna Kea in Hawaii to measure the galaxy's metallicity at several different points.
Yuan和她的同事利用夏威夷莫纳克亚山上的凯克 II号望远镜对那个星系几个不同地点的金属丰度进行了测量。 yeeyan |