ESO 119-19, AM 0452-594, IRAS 04521-5949,PGC 16234
NGC 1703 is aspiral galaxy in the constellationDorado. The galaxy lies about 60 millionlight years away from Earth, which means, given its apparent dimensions, that NGC 1703 is approximately 50,000 light years across.[2] It was discovered byJohn Herschel on December 4, 1834.[4]
The galaxy is characterised as SA(s)c meaning that it doesn't have abar, however there may be a weak bar present.[5] There is no box-shapedbulge detected, a feature commonly associated with barred galaxies.[6] The galaxy is seen nearly face-on, at an inclination of about 27°.[5] It has a small nucleus and two well-defined spiral arms in agrand design pattern. The arms are smooth for about half a revolution but their outer regions are patchy. One arm can be traced for about a full revolution while the other fades after about three quarters of a revolution.[7] In the centre of the galaxy lies asupermassive black hole, whose mass is estimated to be 107.01 ± 0.40 (4 - 26 million)M☉, based on the pitch angle of the spiral arms.[8] Thestar formation rate based on theHI amount is estimated to be about 1.1 solar mass per year.[9]
NGC 1703 is located in the vicinity of theDorado Group, lying in the same galaxy cloud as the rest of the members.[10] Garcia considers the galaxy a member of the LGG 119 group, which also includesNGC 1672 andNGC 1688.[11]
^Méndez-Abreu, J.; Corsini, E. M.; Debattista, Victor P.; De Rijcke, S.; Aguerri, J. A. L.; Pizzella, A. (1 June 2008). "Confirmation of a Kinematic Diagnostic for Face-On Box/Peanut-shaped Bulges".The Astrophysical Journal.679 (2):L73 –L76.arXiv:0804.3589.Bibcode:2008ApJ...679L..73M.doi:10.1086/589541.hdl:11577/2447890.
^Eskridge, Paul B.; Frogel, Jay A.; Pogge, Richard W.; Quillen, Alice C.; Berlind, Andreas A.; Davies, Roger L.; DePoy, D. L.; Gilbert, Karoline M.; Houdashelt, Mark L.; Kuchinski, Leslie E.; Ramirez, Solange V.; Sellgren, K.; Stutz, Amelia; Terndrup, Donald M.; Tiede, Glenn P. (November 2002). "Near-Infrared and Optical Morphology of Spiral Galaxies".The Astrophysical Journal Supplement Series.143 (1):73–111.arXiv:astro-ph/0206320.Bibcode:2002ApJS..143...73E.doi:10.1086/342340.
^Davis, Benjamin L.; Berrier, Joel C.; Johns, Lucas; Shields, Douglas W.; Hartley, Matthew T.; Kennefick, Daniel; Kennefick, Julia; Seigar, Marc S.; Lacy, Claud H. S. (20 June 2014). "The Black Hole Mass Function Derived from Local Spiral Galaxies".The Astrophysical Journal.789 (2): 124.arXiv:1405.5876.Bibcode:2014ApJ...789..124D.doi:10.1088/0004-637X/789/2/124.S2CID119302157.
