SN 1994D was a Type Ia supernova event on the outskirts of galaxy NGC 4526, which was observed in 1994.

Observation

Light curves in four photometric bands for SN 1994D, adapted from Richmond et al. (1995)

It was offset by 9.0″ west and 7.8″ south of the galaxy center and positioned near a prominent dust lane. It was caused by the explosion of a white dwarf star composed of carbon and oxygen. This event was discovered on March 7, 1994, by R. R. Treffers and associates using the automated 30-inch telescope at Leuschner Observatory. It reached peak visual brightness, magnitude 11.9, two weeks later on March 22. 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. A mass of 0.014 to 0.03 M☉ in helium would be needed to produce this feature.

See also

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:. Bibcode:. doi:. S2CID .

External links