Boötes I (dwarf galaxy)

Boötes Dwarf Galaxy
Observation data (J2000 epoch)
Constellation Boötes
Right ascension 14h 00m 06s[1]
Declination +14° 30′ 00″ ± 15″[1]
Distance 197 ± 18 kly (60 ± 6 kpc)[1]
Type dSph[1]
Apparent dimensions (V) 26′.0 ± 1′.4[1]
Apparent magnitude (V) 13.1[a]
Other designations
Boo dSph, Boötes Satellite, Boötes Dwarf Spheroidal Galaxy, Boötes dSph galaxy[2]
See also: Galaxy, List of galaxies

The Boötes Dwarf Galaxy (Boo I dSph) is a faint galaxy, with a total luminosity of 100,000 Suns and an absolute magnitude of –5.8. It lies about 197,000 light-years away in the constellation Boötes. This dwarf spheroidal galaxy appears to be tidally disrupted[1] by the Milky Way Galaxy, which it orbits, and has two stellar tails that cross over to form a cross. Tidally disrupted galaxies usually only form one tail.

Like many of the ultrafaint dwarf spheroidals, the entire galaxy is fainter than the star Rigel (absolute magnitude –6.8).

External links

Notes

  1. ^ Apparent magnitude = Absolute magnitude + Distance modulus = -5.8[1] + 18.9[1] = 13.1

References

  1. ^ a b c d e f g h Belokurov, V.; Zucker, D. B.; Evans, N. W.; Wilkinson, M. I.; Irwin, M. J.; Hodgkin, S.; Bramich, D. M.; Irwin, J. M.; Gilmore, G.; Willman, B.; Vidrih, S.; Newberg, H. J.; Wyse, R. F. G.; Fellhauer, M.; Hewett, P. C.; Cole, N.; Bell, E. F.; Beers, T. C.; Rockosi, C. M.; Yanny, B.; Grebel, E. K.; Schneider, D. P.; Lupton, R.; Barentine, J. C.; Brewington, H.; Brinkmann, J.; Harvanek, M.; Kleinman, S. J.; Krzesinski, J.; Long, D.; Nitta, A.; Smith, J. A.; Snedden, S. A. (2006). "A Faint New Milky Way Satellite in Bootes". The Astrophysical Journal 647 (2): L111–L114. arXiv:astro-ph/0604355. Bibcode 2006ApJ...647L.111B. doi:10.1086/507324. 
  2. ^ "SIMBAD Astronomical Database". Results for Bootes dSph. http://simbad.u-strasbg.fr/Simbad. Retrieved 2006-12-20. 
Location
Galactic core
Spiral arms
Satellite galaxies
Other

Coordinates: 14h 00m 06s, +14° 30′ 00″