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] |
| Apparent magnitude (V) | 13.1[a] |
| Characteristics | |
| Type | dSph[1] |
| Apparent size (V) | 26′.0 ± 1′.4[1] |
| Other designations | |
| Boo dSph, Boötes Satellite, Boötes Dwarf Spheroidal Galaxy, Boötes dSph galaxy,[2] PGC 4713553 | |
The Boötes Dwarf Galaxy (Boo I dSph) is a galaxy, which appears faint, with a luminosity of 100,000 L☉ and an absolute magnitude of –5.8. It lies about 197 thousand light-years (60.4 kiloparsecs) 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 appears fainter than the Rigel system (absolute magnitude –7.84).[3]
Notes
- ^ Apparent magnitude = Absolute magnitude + Distance modulus = –5.8[1] + 18.9[1] = 13.1
References
- 1 2 3 4 5 6 7 8 Belokurov, V.; Zucker, D. B.; Evans, N. W.; Wilkinson, M. I.; et al. (2006). "A Faint New Milky Way Satellite in Bootes". The Astrophysical Journal. 647 (2): L111–L114. Bibcode:2006ApJ...647L.111B. arXiv:astro-ph/0604355
. doi:10.1086/507324. - ↑ "SIMBAD Astronomical Database". Results for Bootes dSph. Retrieved 2006-12-20.
- ↑ Shultz, M.; Wade, G. A.; Petit, V.; Grunhut, J.; Neiner, C.; Hanes, D.; MiMeS Collaboration (2014). "An observational evaluation of magnetic confinement in the winds of BA supergiants". Monthly Notices of the Royal Astronomical Society. 438 (2): 1114. Bibcode:2014MNRAS.438.1114S. arXiv:1311.5116 . doi:10.1093/mnras/stt2260.
External links
- The Universe within 500,000 light-years The Satellite Galaxies (Atlas of the Universe)
- Two New Galaxies Orbiting the Milky Way (Ken Croswell) April 19, 2006
- Strange satellite galaxies revealed around Milky Way Kimm Groshong (New Scientist) 17:00 24 April 2006
- New Milky Way companions found: SDSS-II first to view two dim dwarf galaxies (SDSS) May 8, 2006
- Astronomers Find Two New Milky Way Companions (SpaceDaily) May 10, 2006
- Boötes Dwarf Galaxy at Constellation Guide
| Location | Milky Way → Milky Way subgroup → Local Group → Virgo Supercluster → Laniakea Supercluster → Observable universe → Universe Each arrow (→) may be read as "within" or "part of". |  | |||||||
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| Galactic core | |||||||||
| Spiral arms | |||||||||
| Satellite galaxies |
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| Related | |||||||||
 Astronomy portal | |||||||||
Coordinates: 
14h 00m 06s, +14° 30′ 00″
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