
微類星體
Sign in to savethumb|Artist's impression of the microquasar SS 433 A microquasar, a smaller version of a quasar, is a compact region surrounding a stellar black hole with a mass several times that of its companion star, observable in sufficient detail, in our own or nearby galaxy. The matter being pulled from the companion star forms an accretion disk around the black hole. This accretion disk may become so hot, due to friction, that it begins to emit X-rays. The disk also projects narrow streams or "jets" of subatomic particles at near-light speed, generating a strong radio wave emission.
Wikidata facts
- Subclass of
- X-ray binary
Show 2 more facts
- topic's main category
- Category:Microquasars
- Commons category
- Microquasars
via Wikidata · CC0
Article · 中文
微類星體是類星體的小型表親。其命名看得出來是源自類星體,而兩者間有些共同點:強烈且時變的無線電波放射,常表現成無線電波噴流(radio jet),以及一個圍繞黑洞的積氣盤(accretion disk)。在類星體,黑洞具有超級大的質量(百萬計的太陽質量);在微類星體,黑洞質量為幾個太陽質量。在微類星體,堆積的質量體來自一顆普通的恆星,而且積氣盤在可見光區與X射線區具有非常高的亮度。微類星體有時候稱作「無線電波噴流X射線雙星」,以和其他的X射線雙星(X-ray binaries)做區別。一部分的無線電波放射來自於相對論性噴流(近光速),常表現出外顯的超光速運動。 微類星體在研究相對論性噴流方面極為重要。噴流成形於黑洞附近,而黑洞附近的時間尺度和黑洞質量成比例關係。因此,尋常的類星體要幾百年才做的改變,微類星體可以在一天內完全經歷。
Abstract from DBpedia / Wikipedia · CC BY-SA