Astronomy:Messier 98

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Short description: Intermediate spiral galaxy in the constellation Coma Berenices
Messier 98
Messier 98.jpg
Galaxy Messier 98 by ESO New Technology Telescope
Observation data (J2000 epoch)
ConstellationComa Berenices
Right ascension 12h 13m 48.292s[1]
Declination+14° 54′ 01.69″[1]
Redshift−0.000474[2]
Helio radial velocity−142 ± 4 km/s[2]
Distance44.4 million light years (13.6 Mpc)[3]
Apparent magnitude (V)10.1[4]
Characteristics
TypeSAB(s)ab[3]
Apparent size (V)9′.8 × 2′.8[5]
Other designations
NGC 4192, UGC 7231, PGC 39028[2]

Messier 98, M98 or NGC 4192, is an intermediate spiral galaxy about 44.4[3] million light-years away in slightly northerly Coma Berenices, about 6° to the east of the bright star Denebola (Beta Leonis). It was discovered by French astronomer Pierre Méchain on 1781,[lower-alpha 1] along with nearby M99 and M100, and was catalogued by compatriot Charles Messier 29 days later in his Catalogue des Nébuleuses & des amas d'Étoiles.[5] It has a blueshift, denoting ignoring of its fast other movement (vectors of proper motion), it is approaching at about 140 km/s.[2]

The morphological classification of this galaxy is SAB(s)ab,[3] which indicates it is a spiral galaxy that displays mixed barred and non-barred features with intermediate to tightly wound arms and no ring.[6] It is highly inclined to the line of sight at an angle of 74°[7] and has a maximum rotation velocity of 236 km/s.[8] The combined mass of the stars in this galaxy is an estimated 76 billion (7.6 × 1010) times the mass of the Sun. It contains about 4.3 billion solar masses of neutral hydrogen and 85 million solar masses in dust.[9] The nucleus is active, displaying characteristics of a "transition" type object. That is, it shows properties of a LINER-type galaxy intermixed with an H II region around the nucleus.[10]

Messier 98 is a member of the Virgo Cluster, which is a large cluster of galaxies, part of the local supercluster.[11]

About 750 million years ago, it may have interacted with the large spiral galaxy Messier 99. These are now separated by 1,300,000 ly (400,000 pc).[8]


See also

References

  1. ↑ 1.0 1.1 Skrutskie, Michael F.; Cutri, Roc M.; Stiening, Rae; Weinberg, Martin D.; Schneider, Stephen E.; Carpenter, John M.; Beichman, Charles A.; Capps, Richard W. et al. (1 February 2006). "The Two Micron All Sky Survey (2MASS)". The Astronomical Journal 131 (2): 1163–1183. doi:10.1086/498708. ISSN 0004-6256. Bibcode: 2006AJ....131.1163S. https://ui.adsabs.harvard.edu/abs/2006AJ....131.1163S/abstract. 
  2. ↑ 2.0 2.1 2.2 2.3 "NASA/IPAC Extragalactic Database". Results for Messier 98. http://nedwww.ipac.caltech.edu/cgi-bin/nph-objsearch?objname=Messier+98&img_stamp=yes. 
  3. ↑ 3.0 3.1 3.2 3.3 Erwin, Peter; Debattista, Victor P. (May 2013), "Peanuts at an angle: detecting and measuring the three-dimensional structure of bars in moderately inclined galaxies", Monthly Notices of the Royal Astronomical Society 431 (4): 3060–3086, doi:10.1093/mnras/stt385, Bibcode: 2013MNRAS.431.3060E. 
  4. ↑ "Messier 98". https://messier.seds.org/m/m098.html. 
  5. ↑ 5.0 5.1 Thompson, Robert; Thompson, Barbara (2007), Illustrated Guide to Astronomical Wonders: From Novice to Master Observer, Diy Science, O'Reilly Media, Inc., p. 196, ISBN 978-0596526856, https://books.google.com/books?id=ymt9nj_uPhwC&pg=PA196. 
  6. ↑ Buta, Ronald J. et al. (2007), Atlas of Galaxies, Cambridge University Press, pp. 13–17, ISBN 978-0521820486, https://books.google.com/books?id=g-P7dCbB5MEC&pg=PA16. 
  7. ↑ Schoeniger, F.; Sofue, Y. (July 1997), "The CO Tully-Fisher relation for the Virgo cluster", Astronomy and Astrophysics 90: 1681–1759, Bibcode: 1997A&A...323...14S. 
  8. ↑ 8.0 8.1 Duc, Pierre-Alain; Bournaud, Frederic (February 2008), "Tidal Debris from High-Velocity Collisions as Fake Dark Galaxies: A Numerical Model of VIRGOHI 21", The Astrophysical Journal 673 (2): 787–797, doi:10.1086/524868, Bibcode: 2008ApJ...673..787D. 
  9. ↑ Davies, J. I. et al. (February 2012), "Studies of the Virgo Cluster. II – A catalog of 2096 galaxies in the Virgo Cluster area", Monthly Notices of the Royal Astronomical Society 419 (4): 3505–3520, doi:10.1111/j.1365-2966.2011.19993.x, Bibcode: 2012MNRAS.419.3505D. 
  10. ↑ Terashima, Yuichi et al. (1985), "ASCA Observations of "Type 2" LINERs: Evidence for a Stellar Source of Ionization", The Astrophysical Journal 533 (2): 729–743, doi:10.1086/308690, Bibcode: 2000ApJ...533..729T. 
  11. ↑ Binggeli, B.; Sandage, A.; Tammann, G. A. (1985), "Studies of the Virgo Cluster. II – A catalog of 2096 galaxies in the Virgo Cluster area", Astronomical Journal 90: 1681–1759, doi:10.1086/113874, Bibcode: 1985AJ.....90.1681B. 
  1. ↑ 15 March

External links

Coordinates: Sky map 12h 13m 48.3s, +14° 54′ 01″



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