【 在 EPS (一江煙水) 的大作中提到: 】
: 【 在 akn (akn) 的大作中提到: 】
: : 1.為何利用無線電觀測星系的時候,都是利用QSO來作流量和圖像的修正?
: 1. The emission from QSOs is very strong at all radio wavelengths.
: 2. They are ideal point sources in most cases.
: 3. You can find QSOs in almost all directions, they are not confined
: to galactic plane or zodiacal plane.
1.well,compared with the normal galaxy,QSO is strong at radio wavelengths.But
in fact,we should understand that almost QSO is radio quiet,they only have
peaks at optics and infrared wavelengths.
--
※ 來源:‧南十字 crux.chem.nsysu.edu.tw‧[FROM: 163.24.171.151]