Recoating Yepun's mirror

Rotation curve (velocity vrs. distance from the centre) of the disk surrounding the black hole at the centre of Centaurus A . From the ISAAC spectrum displayed in ESO Press Photo eso0109, the `average' gas velocities along the slit direction can be derived. Position `0' on the horizontal axis indicates the exact position of the galaxy nucleus; at the distance of Centaurus A, 1 arcsec corresponds to 55.5 light-years (17 pc). The blue triangles and the red squares correspond to emission lines from singly ionized Iron atoms ([Fe II]) and Hydrogen (Paschen-Beta), respectively. The high velocities are the hallmark of a central black hole. The thick solid line represents the expected velocities, assuming the presence of a 200 million solar-mass black hole at the centre.



O snímku

Datum zveřejnění:8. března 2001
Související články:eso0109
Velikost:682 x 703 px

O objektu

Jméno:Centaurus A, NGC 5128
Typ:Local Universe : Galaxy : Component : Central Black Hole
Vzdálenost:13 milion světelné roky
Quasars and Black Holes

Image Formats