SN 1990U
SN 1990U was a type Ic supernova event in the nucleus of the galaxy NGC 7479. It was discovered July 27, 1990 by the Berkeley Automated Supernova Search after reaching magnitude 16±0.5.[1] Initially this was classified as a Type Ib supernova, but the weakness of the neutral helium absorption lines led to a reclassification.[4]
| Other designations | SN 1990U |
|---|---|
| Event type | Supernova  |
| Spectral class | SN Ic[1] |
| Date | July 27, 1990[1] |
| Constellation | Pegasus |
| Right ascension | 23h 04m 54.96s[2] |
| Declination | +12° 18′ 20.1″[2] |
| Epoch | J2000.0 |
| Galactic coordinates | 086.2501 -42.8526 |
| Distance | 105,000,000 l.y. |
| Redshift | 0.00794[3] |
| Host | NGC 7479 |
| Peak apparent magnitude | 16±0.5[1] |
References
- Gomez, G.; Lopez, R. (July 1994), "Spectral evolution of the He-Poor supernovae 1990U in NGC 7479 and 1991A in IC 2973", The Astronomical Journal, 108 (1): 195–201, Bibcode:1994AJ....108..195G, doi:10.1086/117058
- Tsvetkov, D. Yu.; Pavlyuk, N. N.; Bartunov, O. S.; Pskovskii, Yu. P., Sternberg Astronomical Institute Supernova Catalogue, Sternberg Astronomical Institute, Moscow University, retrieved 2015-08-26
- Modjaz, M.; Kewley, L.; Bloom, J. S.; Filippenko, A. V.; Perley, D.; Silverman, J. M. (April 2011), "Progenitor Diagnostics for Stripped Core-collapse Supernovae: Measured Metallicities at Explosion Sites", The Astrophysical Journal Letters, 731 (1): 6, arXiv:1007.0661, Bibcode:2011ApJ...731L...4M, doi:10.1088/2041-8205/731/1/L4, S2CID 56147580, L4
- Matheson, Thomas; Filippenko, Alexei V.; Li, Weidong; Leonard, Douglas C.; Shields, Joseph C. (March 2001), "Optical Spectroscopy of Type IB/C Supernovae", The Astronomical Journal, 121 (3): 1648–1675, arXiv:astro-ph/0101119, Bibcode:2001AJ....121.1648M, doi:10.1086/319390, S2CID 119438971
External links
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