Messier 106
(Redirected from M106)
| Galaxy | List of galaxies |
|---|---|
 M106 taken at St. Francis Xavier University | |
| Observation data (Epoch J2000) | |
| Constellation | Canes Venatici |
| Right ascension | 12h 18m 57.5s[1] |
| Declination | +47° 18′ 14″[1] |
| Redshift | 448 ± 3 km/s[1] |
| Distance | 23.7 ± 1.5 Mly (7.3 ± 0.5 Mpc)[2] |
| Type | SAB(s)bc[1] |
| Apparent dimensions (V) | 18′.6 × 7′.2[1] |
| Apparent magnitude (V) | +9.1[1] |
| Notable features | Maser galaxy,[3] Seyfert II galaxy[4] |
| Other designations | |
| | |
Messier 106 (also known as NGC 4258) is a spiral galaxy about in the constellation Canes Venatici. It was discovered by Pierre Méchain in 1781. M106 is at a distance of about 22 to 25 million light-years away from Earth. It is also a Seyfert II galaxy, which means that due to x-rays and unusual emission lines detected, it is suspected that part of the galaxy is falling into a supermassive black hole in the center.[5]
Contents |
Characteristics
M106 has a water vapor maser that is seen by the 22GHz line of ortho-H2O that evidences dense and warm molecular gas. Water masers are useful to observe nuclear accretion disks in active galaxies. M106 has a slightly warped, thin, almost edge-on Keplerian disk which is on a subparsec scale. It surrounds a central area with mass 4 × 107M?.[6]
See also
External links
References
- ^ a b c d e f g NASA/IPAC Extragalactic Database. Results for NGC 4258. Retrieved on 2006-10-18.
- ^ J. L. Tonry, A. Dressler, J. P. Blakeslee, E. A. Ajhar, A. B. Fletcher, G. A. Luppino, M. R. Metzger, C. B. Moore (2001). "The SBF Survey of Galaxy Distances. IV. SBF Magnitudes, Colors, and Distances". Astrophysical Journal 546: 681-693.
- ^ Bonanos, Alceste Z. (2006). "Eclipsing Binaries: Tools for Calibrating the Extragalactic Distance Scale". Binary Stars as Critical Tools and Tests in Contemporary Astrophysics, International Astronomical Union. Symposium no. 240, held 22-25 August, 2006 in Prague, Czech Republic, S240, #008.
- ^ Humphreys, E. M. L.; Greenhill, L. J.; Reid, M. J.; Argon, A. L.; Moran, J. M. (2004). "Improved Maser Distance to NGC 4258". American Astronomical Society Meeting 205, #73.01; Bulletin of the American Astronomical Society 36: 1468.
- ^ A spiral galaxy with a strange core.
- ^ Henkel, C.; Peck, A. B.; Tarchi, A.; Nagar, N. M.; Braatz, J. A.; Castangia, P.; Moscadelli, L. (June II 2005). "New H2O masers in Seyfert and FIR bright galaxies". Astronomy and Astrophysics 436 (1): 75-90.
Categories
Canes Venatici constellation | Messier objects | NGC objects | UGC objects | PGC objects | Intermediate spiral galaxies | Spiral galaxies | M106 group