絕對視星等 的英文怎麼說
中文拼音 [juéduìshìxīngděng]
絕對視星等
英文
absolute visual magnitude- 絕 : Ⅰ動詞(斷絕) cut off; sever Ⅱ形容詞1 (完全沒有了; 窮盡; 凈盡) exhausted; used up; finished 2 ...
- 對 : Ⅰ動詞1 (回答) answer; reply 2 (對待; 對付) treat; cope with; counter 3 (朝; 向; 面對) be tr...
- 視 : Ⅰ動詞1. (看) look at 2. (看待) regard; look upon 3. (考察) inspect; watch Ⅱ名詞(姓氏) a surname
- 星 : 名詞1 (夜晚天空中閃爍發光的天體) star 2 [天文學] (宇宙間能發射光或反射光的天體) heavenly body...
- 等 : Ⅰ量詞1 (等級) class; grade; rank 2 (種; 類) kind; sort; type Ⅱ形容詞(程度或數量上相同) equa...
- 星等 : [天文學] magnitude; star magnitude; stellar magnitude; brightness
-
For example, the apparent magnitude of our sun is - 26. 8, but its absolute magnitude is just 4. 8. the absolute magnitude describes the
例如太陽的視星等為- 26 . 9等,但它的絕對星等只有4 . 8等。Two stars have the same absolute magnitude. one is thousand times farther away than the other. what is the difference in apparent magnitudes ? which magnitude larger
兩顆星具有相同的絕對星等,其中的一顆比另一顆距離遠1000倍,它們的目視星等有何不同?哪一個的星等數值大?The longer the period, the brighter the star is. thus, by measuring the period of a cepheid variable, we know its absolute magnitude, hence, we can tell how far it is away by comparing with its apparent magnitude
所以,只要知道某一造父變星的周期,我們便可得知它的絕對星等,只要和它的視星等作比較,便可以求得它和我們的距離。The 29 f globular clusters in the galaxy are selected as samples in my paper ( the space distribution and motional orbits of the samples have not been researched in detail before. ). according to the basic parameters : azimuth coordinates, distances from the sun, radial velocities and proper motions of sample clusters, the initial positions and velocities of the samples are reduced using the galactic coordinates, and their orbits are integrated by numerical method for three different galactic gravitational potential models
本文選用銀河系中29個累積光譜型為f型的球狀星團作為樣本(這些樣本星團的空間分佈和運動特徵都沒有被詳細地討論過) ,根據它們的基本資料:方位坐標、日心距、視向速度,絕對自行等參數,歸算處理得出了各樣本星團的空間分佈和運動速度。分享友人