NGC 2841

NGC 2841 is an inclined, unbarred, spiral galaxy in the constellation Ursa Major that exhibits a prominent inner ring structure. It was discovered on 9 March 1788 by William Herschel.[2] Initially thought to be about 30 million light-years distant, a 2001 Hubble Space Telescope survey of the galaxy's Cepheid variables determined its distance to be approximately 14.1 megaparsecs or 46 million light-years.[3]

NGC 2841
Image taken by the Hubble Space Telescope.
Observation data (J2000 epoch)
ConstellationUrsa Major
Right ascension 9h 22m 02.6s[1]
Declination+50° 58′ 35″[1]
Redshift638 ± 3 km/s[1]
Apparent magnitude (V)10.1[1]
Characteristics
TypeSA(r)b, LINER[1]
Apparent size (V)8′.1 × 3′.5[1]
Other designations
UGC 4966, PGC 26512[1]

Structure

NGC 2841 is a giant spiral galaxy with properties similar to those of the Andromeda Galaxy.[3] It is a prototypical flocculent spiral galaxy, a type of spiral galaxy whose arms are patchy and discontinuous.[4]

NGC 2841 is home to a large population of young blue stars, and a few H II regions.[5]

LINER emission

NGC 2841 contains a low-ionization nuclear emission-line region (LINER), a type of region that is characterized by spectral line emission from weakly ionized atoms.[6]

  • Hubble image of NGC 2841.
  • Picture taken at the Mount Lemmon SkyCenter showing the whole galaxy.

References
  1. "NASA/IPAC Extragalactic Database". Results for NGC 2841. Retrieved 2006-10-04.
  2. "Celestial Atlas". Cseligman. Retrieved 2016-03-01.
  3. Macri, L. M.; Stetson, P. B.; Bothun, G. D.; Freedman, W. L.; et al. (September 2001). "The Discovery of Cepheids and a New Distance to NGC 2841 Using the Hubble Space Telescope". Astrophysical Journal. 559 (1): 243–259. arXiv:astro-ph/0105491. Bibcode:2001ApJ...559..243M. doi:10.1086/322395. ISSN 0004-637X.
  4. "A Near-Infrared Atlas of Spiral Galaxies", by Debra Meloy Elmegreen, "CH3. Discussion" (accessed 23 April 2010)
  5. Marochnik, Leonid; Suchkov, Anatoly (1995-11-01). Milky Way Galaxy (1st ed.). Routledge. p. 267. ISBN 978-2-88124-931-0.
  6. L. C. Ho; A. V. Filippenko; W. L. W. Sargent (1997). "A Search for "Dwarf" Seyfert Nuclei. III. Spectroscopic Parameters and Properties of the Host Galaxies". Astrophysical Journal Supplement. 112 (2): 315–390. arXiv:astro-ph/9704107. Bibcode:1997ApJS..112..315H. doi:10.1086/313041.



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