The galaxy photographed with the Víctor M. Blanco Telescope
Observation data (J2000 epoch)
Constellation
Dorado
Right ascension
04h 45m 42.500s[1]
Declination
−59° 14′ 49.85″[1]
Redshift
1331 ± 3 km/s[1]
Distance
51.7 ± 3.0 Mly (15.86 ± 0.92 Mpc)[2]
Apparent magnitude (V)
10.3[1]
Characteristics
Type
(R')SB(r)bc[1]
Apparent size (V)
6.6′ × 5.5′[1]
Other designations
PGC 15941[1]
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NGC 1672 is a barred spiral galaxy located in the constellation Dorado. It was discovered by the astronomer James Dunlop on November 5, 1826.[3] It was originally unclear whether it was a member of the Dorado Group, with some sources[4] finding it to be a member and other sources[5] rejecting its membership. However, recent tip of the red-giant branch (TRGB) measurements indicate that NGC 1672 is located at the same distance as other members, suggesting it is indeed a member of the Dorado Group.[2]
NGC 1672 has a large bar which is estimated to measure around 20 kpc.[6] It has very strong radio emissions emanating from its nucleus, bar, and the inner portion of the spiral arm region.[6] The nucleus is Seyfert type II and is engulfed by a starburst region.[6] The strongest polarized emissions come from the northeastern region which is upstream from its dust lanes.[6] Magnetic field lines are at large angles with respect to the bar and turn smoothly to the center.[6]
Two supernovae have been observed in NGC 1672: SN 2017gax (type Ib/c, mag. 14.1)[7] and SN 2022aau (type II, mag. 16.3).[8]
^ abcdefg"Results for object NGC 1672 (NGC 1672)". NASA/IPAC Extragalactic Database. California Institute of Technology. Retrieved 2021-04-29.
^ abTikhonov, N. A.; Galazutdinova, O. A. (2020). "Distance to the Dorado Group". Astrophysical Bulletin. 75 (4): 384–393. arXiv:2009.04090. Bibcode:2020AstBu..75..384T. doi:10.1134/S199034132004015X. S2CID 221556782.
^Seligman, Courtney. "New General Catalogue objects: NGC 1650 - 1699". cseligman.com. Retrieved 2021-04-29.
^Huchra, J. P.; Geller, M. J. (June 15, 1982). "Groups of galaxies. I - Nearby groups". Astrophysical Journal. 257 (Part 1): 423–437. Bibcode:1982ApJ...257..423H. doi:10.1086/160000.
^Maia, M. A. G.; da Costa, L. N.; Latham, David W. (April 1989). "A catalog of southern groups of galaxies". Astrophysical Journal Supplement Series. 69: 809–829. Bibcode:1989ApJS...69..809M. doi:10.1086/191328. ISSN 0067-0049.
^ abcdeBeck, R.; Shoutenkov, V.; Ehle, M.; Harnett, J. I.; et al. (August 2002). "Magnetic fields in barred galaxies. I. The atlas". Astronomy and Astrophysics. 391 (1): 83–102. arXiv:astro-ph/0207201. Bibcode:2002A&A...391...83B. doi:10.1051/0004-6361:20020642. S2CID 14749261.
^Transient Name Server entry for SN 2017gax. Retrieved 24 March 2023.
^Transient Name Server entry for SN 2022aau. Retrieved 24 March 2023.
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