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Letters to Nature
Nature 396, 142-144 (12 November 1998) | doi:10.1038/24106; Received 3 April 1998; Accepted 20 August 1998
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Emission from 44Ti associated with a previously unknown Galactic supernova
A. F. Iyudin1, V. Schönfelder1, K. Bennett2, H. Bloemen3, R. Diehl1, W. Hermsen3, G. G. Lichti1, R. D. van der Meulen3, J. Ryan4 & C. Winkler2
- Max Planck Institut für extraterrestrische Physik, Postfach 1603, D-85740 Garching, Germany
- Astrophysics Division, ESTEC, 2200 AG Noordwijk, The Netherlands
- SRON-Utrecht, Sorbonnelaan 2, 3584 CA Utrecht, The Netherlands
- University of New Hampshire, Institute for Studies of Earth, Oceans and Space, Durham, New Hampshire 03284, USA
Correspondence to: A. F. Iyudin1 Correspondence and requests for materials should be addressed to A.F.I.
(e-mail: Email: ani@mpe-garching.mpg.de).
Abstract
Nearly 400 years have passed since a supernova was last observed directly in the Milky Way (by Kepler, in 1604). Numerous Galactic supernovae are expected to have occurred since then1, but only one (Cassiopeia A) may have been seen2. The historical record of supernovae is therefore incomplete, as demonstrated by the spatial distribution of young supernova remnants3. The discovery4,5 of
-ray emission from the decay of 44Ti nuclei associated with Cassiopeia A, the youngest known remnant, has revealed a new way to search for the remnants of other relatively recent supernovae (less than
1,000 years old). Here we report the discovery of 44Ti line emission from a previously unknown young supernova remnant, in the direction of the Vela remnant. We estimate a distance of
200 parsecs and an age of
680 years for the remnant, making it the closest young remnant to the Earth. Why it was not recorded historically remains unknown.
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