Messier 84

Messier 84 nucleus by HST

Messier 84 (also known as NGC 4374) is a lenticular galaxy in the constellation of Virgo. M84 is in the heavily populated inner core of the Virgo Cluster of galaxies.

Radio observations and Hubble Space Telescope images of M84 have revealed two jets of matter shooting out from the galaxy's centre, as well as a disk of rapidly rotating gas and stars. This suggests there is a supermassive black hole at the centre of the galaxy. Its mass is 1.5 ×109 M☉, that is gravitation amounting to 15 billion solar masses.

History

Charles Messier discovered Messier 84 in 1781 when he searched for "nebulous objects" in the night sky. The object is the 84th in the Messier Catalogue.

Supernovae

Two supernovae have been observed in M84: SN 1957 and SN 1991bg. Possibly, a third, SN 1980I is part of M84 or, alternatively, one of its neighboring galaxies, NGC 4387 and M86.

References

  1. ↑ Finoguenov A. & Jones C. (2002). "Chandra observation of low-mass X-Ray binaries in the elliptical galaxy M84". Astrophysical Journal. 574 (2): 754–761. arXiv:astro-ph/0204046. Bibcode:2002ApJ...574..754F. doi:10.1086/340997. S2CID 17551432.
  2. ↑ Bower G.A. (1998). "Kinematics of the nuclear ionized gas in the radio galaxy M84 (NGC 4374)". Astrophysical Journal. 492 (1): 111–114. arXiv:astro-ph/9710264. Bibcode:1998ApJ...492L.111B. doi:10.1086/311109. S2CID 119456112.
  3. ↑ Jones K.G. (1991). Messier's nebulae and star clusters (2nd ed.). Cambridge: Cambridge University Press. ISBN 0-521-37079-5.
  4. ↑ Götz W. (1958). "Supernova in NGC 4374 (= M 84)". Astronomische Nachrichten. 284 (3): 141–142. Bibcode:1958AN....284..141G. doi:10.1002/asna.19572840308.
  5. ↑ Kosai H.; et al. (1958). "Supernova 1991bg in NGC 4374". IAU Circ. 5400: 1. Bibcode:1991IAUC.5400....1K.
  6. ↑ Smith H.A. (1981). "The spectrum of the intergalactic supernova 1980I". Astronomical Journal. 86: 998–1002. Bibcode:1981AJ.....86..998S. doi:10.1086/112975.