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SN 1994D was a Type Ia supernova event in the outskirts of galaxy NGC 4526. It was offset by 9.0″ west and 7.8″ south of the galaxy center and positioned near a prominent dust lane.[1] It was caused by the explosion of a white dwarf star composed of carbon and oxygen.[5] This event was discovered on March 7, 1994 by R. R. Treffers and associates using the automated 30-inch telescope at Leuschner Observatory.[2] It reached peak visual brightness two weeks later on March 22.[5] Modelling of the light curve indicates the explosion would have been visible around March 3-4. A possible detection of helium in the spectrum was made by W. P. S. Meikle and associates in 1996.[1] A mass of 0.014 to 0.03 M☉ in helium would be needed to produce this feature.[6]
 Hubble Space Telescope image of SN 1994D, visible at lower left | |
| Event type | Supernova |
|---|---|
| Type Ia[1] | |
| Date | March 7, 1994[2] |
| Constellation | Virgo |
| Right ascension | 12h 34m 02.395s[1] |
| Declination | +07° 42′ 05.70″[1] |
| Epoch | B2000.0 |
| Distance | 55.1 ± 5.2 Mly (16.9 ± 1.6 Mpc)[3] |
| Redshift | 0.0036, 0.0001, −0.0001, 0.0021, 0.0023, 0.0022, 0.0008, 0.0005, 0.0013, 0.0017, 0.0004, 0.0024, 0.0011, 0.0012, 0.0002  |
| Host | NGC 4526[2] |
| Progenitor type | White dwarf |
| Peak apparent magnitude | +15.2 |
| Preceded by | SN 1994C[4] |
| Followed by | SN 1994E[4] |
See also
References
- Meikle, W. P. S.; et al. (July 1996). "An early-time infrared and optical study of the Type IA supernovae SN 1994D and 1991T". Monthly Notices of the Royal Astronomical Society. 281 (1): 263–280. Bibcode:1996MNRAS.281..263M. doi:10.1093/mnras/281.1.263.
- Treffers, R. R.; Filippenko, A. V.; van Dyk, S. D.; Richmond, M. W.; et al. (1994). Green, D. W. E. (ed.). "Supernova 1994D in NGC 4526". IAU Circulars. 5946. Bibcode:1994IAUC.5946....2T.
- Hatt, Dylan; et al. (July 2018). "The Carnegie-Chicago Hubble Program. IV. The Distance to NGC 4424, NGC 4526, and NGC 4356 via the Tip of the Red Giant Branch". The Astrophysical Journal. 861 (2): 10. arXiv:1806.02900. Bibcode:2018ApJ...861..104H. doi:10.3847/1538-4357/aac9cc. 104.
- "List of Supernovae", Central Bureau for Astronomical Telegrams, International Astronomical Union, retrieved 2021-12-02.
- Lentz, Eric J.; et al. (August 2001). "Non-LTE Synthetic Spectral Fits to the Type Ia Supernova 1994D in NGC 4526". The Astrophysical Journal. 557 (1): 266–278. arXiv:astro-ph/0104225. Bibcode:2001ApJ...557..266L. doi:10.1086/322239.
- Boyle, Aoife; et al. (March 2017). "Helium in double-detonation models of type Ia supernovae". Astronomy & Astrophysics. 599: 12. arXiv:1611.05938. Bibcode:2017A&A...599A..46B. doi:10.1051/0004-6361/201629712. A46.
Further reading
- Branch, David; et al. (June 2005). "Comparative Direct Analysis of Type Ia Supernova Spectra. I. SN 1994D". The Publications of the Astronomical Society of the Pacific. 117 (832): 545–552. arXiv:astro-ph/0503165. Bibcode:2005PASP..117..545B. doi:10.1086/430135.
External links
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На других языках
[de] SN 1994D
SN 1994D war eine Supernova vom Typ Ia, die am 7. März 1994 in der Galaxie NGC 4526 aufleuchtete.[1] Sie wurde von R. R. Treffers, A. V. Filippenko, S. D. Van Dyk und M. W. Richmond entdeckt.[2] SN 1994D hatte bei ihrer Entdeckung eine scheinbare Helligkeit von 15,2 mag.[1] Später erreichte die Supernova eine maximale Helligkeit von 11,8 mag.[3] Der Stern war 50 Millionen Lichtjahre[4] von der Erde entfernt, was bedeutet, dass er bereits 50 Millionen Jahren zuvor explodiert war, als das Ereignis 1994 aus dem Erdorbit beobachtet werden konnte.- [en] SN 1994D
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