Figure 24-2: R I V U X G
A Quasar and Its Host Galaxy (a) Appearing pointlike, a quasar can look like a star in images. In this HST image, the bright glare of a quasar named 3C 273 hides its fainter host galaxy. Quasar 3C 273 also has a jet seen in visible light, although quasar jets are usually seen at radio wavelengths. (b) Using a special technique, the quasar is blocked out to reveal the host galaxy.
A Quasar and Its Host Galaxy (a) Appearing pointlike, a quasar can look like a star in images. In this HST image, the bright glare of a quasar named 3C 273 hides its fainter host galaxy. Quasar 3C 273 also has a jet seen in visible light, although quasar jets are usually seen at radio wavelengths. (b) Using a special technique, the quasar is blocked out to reveal the host galaxy.
(NASA, A. Martel [JHU], the ACS Science Team, J. Bahcall [IAS] and ESA)