UGC 11919
| UGC 11919 | |
|---|---|
SDSS image of UGC 11919. | |
| Observation data (J2000 epoch) | |
| Constellation | Lacerta |
| Right ascension | 22h 08m 10.54s[1] |
| Declination | +41° 10′ 38.43″[1] |
| Redshift | 0.017852[1] |
| Heliocentric radial velocity | 5352 ± 5 km/s[1] |
| Distance | 268.3 ± 18.8 Mly (82.25 ± 5.76 Mpc) |
| Apparent magnitude (V) | 13.26[1] |
| Characteristics | |
| Type | SABbc HII[1] |
| Size | ~111,000 ly (33.9 kpc) (estimated)[1] |
| Other designations | |
| 2MASX J22081056+4110383, CGCG 530-010, IRAS 22060+4055, PGC 68110, MCG +07-45-014[1] | |
UGC 11919 is an intermediate spiral galaxy located in the constellation of Lacerta. The redshift of the galaxy is (z) 0.017[1] and it was first discovered by astronomers in 1998.[2] It also has been categorized as an unusual spiral galaxy based on observations.[3]
Description
UGC 11919 is an unusual spiral galaxy with a low dynamical mass to light ratio. When observed, its own stellar velocity dispersion is shown to display a depression feature that possibly hints its nuclear stellar disk is suggested as kinetically decoupled.[4] Evidence also found the galaxy also has presence of spiral arms based on residual imaging and a H I disk feature that suggests as an end result of gravitational interactions. Two companions are found from the galaxy with their velocity differences being 355 and 252 kilometers per seconds respectively.[3]
A study published in 2015, has found the galaxy has a nuclear disk component with low amount of metallicity. This is likely caused through an accretion of a neighboring satellite galaxy of low mass, which is subsequently by star formation. On the other hand, the stellar bulge feature shows the highest metallicity rate. The estimated age of the bulge and nuclear disk is around 4.2 and 2.3 billion years while the disk feature is 2.6 billion years.[5]
References
- ^ a b c d e f g h i "NED Search results for UGC 11919". NASA/IPAC Extragalactic Database. Retrieved 2026-03-16.
- ^ Ma, Jun; Peng, Qiu-He; Gu, Qiu-Sheng (June 1998). "The thicknesses and inclinations of 71 northern spiral galaxies" (PDF). Astronomy and Astrophysics Supplement Series. 130 (3): 449–454. doi:10.1051/aas:1998235. ISSN 0365-0138.
- ^ a b Saburova, A. S.; Józsa, G. I. G.; Zasov, A. V.; Bizyaev, D. V. (2013-06-01). "WSRT observations and surface photometry of two unusual spiral galaxies". Astronomy & Astrophysics. 554: A128. doi:10.1051/0004-6361/201220901. ISSN 0004-6361.
- ^ Saburova, A. S.; Józsa, G. I. G.; Zasov, A. V.; Bizyaev, D. V.; Uklein, R. I. (May 2014). "The Story of UGC 11919: An Unusual Spiral Galaxy Possibly Having a Warp and Peculiarly Low Mass-to-Light Ratio". Multi-Spin Galaxies. 486: 73. ISSN 1050-3390.
- ^ Saburova, A.; Zasov, A.; Uklein, R.; Katkov, I. (2015-08-25). "Long-slit spectral observations and stellar mass-to-light ratio of spiral galaxy UGC11919". Monthly Notices of the Royal Astronomical Society. 453 (2): 1344–1354. doi:10.1093/mnras/stv1667. ISSN 0035-8711.
External links
- UGC 11919 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images