Messier 100

Spiral galaxy in the constellation Coma Berenicies

Messier 100 (also known as NGC 4321) is an example of a so-called 'grand design' spiral galaxy.[1] It is visible in the southern part of constellation Coma Berenices. Messier 100 is one of the brightest and largest galaxies in the Virgo cluster, about 55 million light-years away, with a diameter of 160,000 light years.[2] It was discovered by Pierre Méchain in 1781. Later it was entered in Messier’s catalogue of nebulae and star clusters after Charles Messier made observations of his own a month later.[3][4] The galaxy was one of the first spirals discovered,[3] and was listed as one of 14 spiral nebulae by the Earl of Rosse in 1850.

Messier 100, by the European Southern Observatory
Core of Messier 100 taken with the high resolution channel of Hubble's Advanced Camera for Surveys.

The galaxy has two satellite galaxies, NGC 4323 – connected with M100 by a bridge of luminous matter – and NGC 4328.[5][6]

Star formation change

Messier 100 is considered a starburst galaxy with a radius of 1 kilo-parsec, where star formation has been taking place for least 500 million years in separate bursts.[7] Star formation is concentrated in a ring – actually two tightly wound spiral arms attached to a small nuclear bar.[8][9]

As usual on spiral galaxies of the Virgo Cluster, in the rest of the disk both star formation and neutral hydrogen are reduced in the galaxy's disk, something caused by interactions in the Virgo cluster.[10]

Related pages change

Other Grand design spiral galaxies

References change

  1. "Messier 100". SEDS: Spiral Galaxy M100 (NGC 4321), type Sc, in Coma Berenices. Archived from the original on 2011-09-03. Retrieved 2010-02-23.
  2. "Messier100". Hearst Observatory. Retrieved 2010-02-23.
  3. 3.0 3.1 "Messier 100". SEDS: Observations and Descriptions. Archived from the original on 2011-06-24. Retrieved 2010-02-23.
  4. "Catalog of Nebulae and Star Clusters". SEDS. Archived from the original on 2000-12-03. Retrieved 2010-02-23.
  5. S. di Serego Alighieri; et al. (2007). "The HI content of early-type galaxies from the ALFALFA survey I. Catalogued HI sources in the Virgo cluster". Astronomy and Astrophysics. 474 (3): 851. arXiv:0709.2096. Bibcode:2007A&A...474..851D. doi:10.1051/0004-6361:20078205. S2CID 5332365.
  6. "NGC 4323". SIMBAD. Retrieved 2010-02-23.
  7. Wozniak H.; et al. (1999). "Double-barred starburst galaxies viewed by ISOCAM". The Universe as Seen by ISO. 427: 989. Bibcode:1999ESASP.427..989W.
  8. Sakamoto, Kazushi; et al. (1995). "Bar-driven gas structure and star formation in the center of M100". The Astronomical Journal. 110 (3): 2075. Bibcode:1995AJ....110.2075S. doi:10.1086/117670.
  9. Allard E.L.; et al. (2006). "The star formation history and evolution of the circumnuclear region of M100". Monthly Notices of the Royal Astronomical Society. 371 (3): 1087–1105. arXiv:astro-ph/0606490. Bibcode:2006MNRAS.371.1087A. doi:10.1111/j.1365-2966.2006.10751.x. S2CID 119370091.
  10. R.A. Koopmann & J.D.P. Kenney (2004). "Hα Morphologies and environmental effects in Virgo Cluster spiral galaxies". Astrophysical Journal. 613 (2): 866–885. arXiv:astro-ph/0406243. Bibcode:2004ApJ...613..866K. doi:10.1086/423191. S2CID 17519217.