| NGC 1325 | |
|---|---|
 Hubble Space Telescope image of NGC 1325 | |
| Observation data (J2000 epoch) | |
| Constellation | Eridanus |
| Right ascension | 03 25.576 |
| Declination | −21° 32′ 38.61″ |
| Heliocentric radial velocity | 1,588 |
| Distance | 75.0 Mly (23.01 Mpc)h 0.73 |
| Group or cluster | Eridanus cluster |
| Apparent magnitude (V) | 11.5 |
| Characteristics | |
| Type | SBbc |
| Apparent size (V) | 4.47′ × 1.66′ |
| Notable features | Flocculent spiral galaxy |
| Other designations | |
| IRAS 03221-2143, NGC 1325, UGCA 70, PGC 12737, ESO 548-7, MCG -4-9-4 | |
| References: | |
NGC 1325 is a flocculent spiral galaxy situated in the constellation of Eridanus. Located about 75 million light years away, it is a member of the Eridanus cluster of galaxies, a cluster of about 200 galaxies. It was discovered by William Herschel on 19 December 1799.
NGC 1325 has a Hubble classification of SBbc, which indicates it is a barred spiral galaxy with moderately wound arms. Its angular size on the night sky is 4.5' x 1.7'. The disk of the galaxy is inclined at an angle of 71° with the main axis aligned along a position angle of 232°. The rotation curve for the galaxy is flat across much of the radius from the core. The galaxy is moving away from the Milky Way with a heliocentric radial velocity of 1,588 km/s.
Supernovae
Two supernovae have been observed in NGC 1325:
- SN 1975S was discovered by Justus Dunlap and Yvonne Dunlap at Corralitos Observatory on 30 December 1975 . Designated with a magnitude of 14.6, it was positioned 53″ east and 77″ north of the galactic nucleus. The color of this supernova and the rapid decline of the lightcurve suggest it was a type II supernova.
- SN 2021yja (type II-P or type Ic, mag. 15.334) was discovered by ATLAS on September 8, 2021. A core-collapse supernova, it was initially categorized as a type II, but may instead be a type Ic.
References
- ^ Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
- ^ Tully, R. Brent; et al. (August 2016). "Cosmicflows-3". The Astronomical Journal. 152 (2): 21. arXiv:1605.01765. Bibcode:2016AJ....152...50T. doi:10.3847/0004-6256/152/2/50. S2CID 250737862. 50.
- ^ Angiras, R. A.; et al. (July 2006). "Origin of disc lopsidedness in the Eridanus group of galaxies". Monthly Notices of the Royal Astronomical Society. 369 (4): 1849–1857. arXiv:astro-ph/0604120. Bibcode:2006MNRAS.369.1849A. doi:10.1111/j.1365-2966.2006.10418.x. S2CID 118927254.
- Dunlop, Storm (2005). Atlas of the Night Sky. Collins. ISBN 978-0-00-717223-8.
- ^ Paturel, G.; et al. (December 2003). "HYPERLEDA. I. Identification and designation of galaxies". Astronomy and Astrophysics. 412: 45–55. Bibcode:2003A&A...412...45P. doi:10.1051/0004-6361:20031411.
- "NGC 1325". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2021-12-15.
- Mitchell, Carl J.; et al. (March 2018). "The RINGS Survey. III. Medium-resolution Hα Fabry-Pérot Kinematic Data Set". The Astronomical Journal. 155 (3): 28. arXiv:1801.07750. Bibcode:2018AJ....155..123M. doi:10.3847/1538-3881/aaabb8. S2CID 59472535. 123.
- Dunlap, J.; Dunlap, Y. (December 1975). Marsden, B. G. (ed.). "Supernova in NGC 1325". IAU Circular. 2893 (1): 1. Bibcode:1975IAUC.2893....1D.
- "List of Supernovae", Central Bureau for Astronomical Telegrams, International Astronomical Union, retrieved 2021-12-02.
- Wegner, G. (December 1977). "Photometric observations of the supernovae in NGC 7723, NGC 1325 and NGC 4402". Monthly Notices of the Royal Astronomical Society. 181 (4): 677–684. Bibcode:1977MNRAS.181..677W. doi:10.1093/mnras/181.4.677.
- "SN 2021yja". Transient Name Server. IAU. Retrieved 2 December 2024.
- Smith, K. W.; et al. (September 2021). "ATLAS21bidw (AT2021yja): discovery of a candidate SN in NGC 1325 (22 Mpc)". Transient Name Server AstroNote 2021-235. 235: 1. Bibcode:2021TNSAN.235....1S.
- Ryder, S. D.; et al. (September 2021). "Radio observations of SN 2021yja". The Astronomer's Telegram. 14915: 1. Bibcode:2021ATel14915....1R.
External links
Media related to NGC 1325 at Wikimedia Commons
