UGC 6945

UGC 6945
Observation data
Right ascension 11h 57m 54.87s[1]
Declination +36° 23′ 32.8″[1]
Redshift 0.035388 ± 0.000130[2]
Helio radial velocity +10,511 km s−1[2]
Distance 175 Mpc (570 Mly)
Apparent dimensions (V) 1.202′[3]
Other designations
Arp 194, VV 126
See also: Galaxy, List of galaxies

UGC 6945 is a pair of interacting galaxies. The galaxy to the northwest has an angular size of 0′.8 × 0′.6. It is in a disrupted state because of the interaction. About 40″ to the southeast is a normal-looking second galaxy with an angular size of 0′.35 × 0′.35. Based upon a radial velocity of about 10,500 km s−1, this galaxy pair is located at a distance of 175 Mpc (570 Mly) (assuming a Hubble constant value of 60 km s−1 Mpc−1). This indicates that the two galaxies are separated by a projected linear distance of roughly 34 Kpc (110 Kly).[4]

This pair underwent a head-on encounter about 108 years ago. Tidally-stripped gas from the encounter is falling toward the southern galaxy as a series of blobs, which are fueling a burst of star formation.[4]

References

  1. ^ a b Cotton, W. D.; Condon, J. J.; Arbizzani, E. (December 1999). "Arcsecond Positions of UGC Galaxies". The Astrophysical Journal Supplement Series 125 (2): 409–412. Bibcode 1999ApJS..125..409C. doi:10.1086/313286. 
  2. ^ a b Huchra, John P.; Geller, Margaret J.; Corwin, Harold G., Jr. (August 1995). "The CfA Redshift Survey: Data for the NGP +36 Zone". Astrophysical Journal Supplement 99: 391. Bibcode 1995ApJS...99..391H. doi:10.1086/192191. 
  3. ^ "UGC 6945 -- Interacting Galaxies". SIMBAD. Centre de Données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-id?Ident=UGC+6945. Retrieved 2011-03-11. 
  4. ^ a b Marziani, P.; Dultzin-Hacyan, D.; D'Onofrio, M.; Sulentic, J. W. (April 2003). "Arp 194: Evidence of Tidal Stripping of Gas and Cross-Fueling". The Astronomical Journal 125 (4): 1897–1907. arXiv:astro-ph/0212547. Bibcode 2003AJ....125.1897M. doi:10.1086/368142. 

External links