Spectrum of Gas Disc in Active Galaxy M87

A schematic diagram of velocity measurements of a rotating disk of hot gas in the core of active galaxy M87.

The measurement was made by studying how the light from the disk is redshifted and blueshifted -- as part of the swirling disk spins in earth's direction and the other side spins away from earth.


Holland Ford, Space Telescope Science Institute/Johns Hopkins University; Richard Harms, Applied Research Corp.; Zlatan Tsvetanov, Arthur Davidsen, and Gerard Kriss at Johns Hopkins; Ralph Bohlin and GeorgeHartig at Space Telescope Science Institute; Linda Dressel and Ajay K.Kochhar at Applied Research Corp. in Landover, Md.; and Bruce Margon fromthe University of Washington in Seattle NASA/ESA

About the Image

NASA press release
NASA caption
Release date:25 May 1994, 06:00
Size:800 x 800 px

About the Object

Name:IRAS 12282+1240, M 87, Messier 87, NGC 4486, Virgo Galaxy
Type:• Local Universe : Galaxy : Component : Central Black Hole
Distance:55 million light years

Image Formats

Large JPEG
148.2 KB
Screensize JPEG
211.0 KB

Colours & filters

H-alpha + Nii
658 nm Hubble Space Telescope

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