Host galaxy of ASASSN-14li

Host galaxy of ASASSN-14li


10/01/2019 11:15 pm


X-ray: NASA/CXC/MIT/D. Pasham et al; Optical: HST/STScI/I. Arcavi


The host galaxy of ASASSN-14li, a black hole devouring a star, as observed by the NASA/ESA Hubble Space Telescope in optical wavelengths. The insert in the lower left shows the X-ray view obtained by NASA’s Chandra observatory.

Observations of ASASSN-14li have revealed an exceptionally bright and stable signal that oscillated over a period of 131 seconds for a long time: 450 days.

By combining this with information about the black hole’s mass and size, the astronomers found that the hole must be spinning rapidly – at more than 50% of the speed of light – and that the signal came from its innermost regions.

More information

Explore this object in ESASky

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