Astronomy and Astrophysics – Astrophysics
Scientific paper
Nov 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980apj...241.1039s&link_type=abstract
Astrophysical Journal, Part 1, vol. 241, Nov. 1, 1980, p. 1039-1044. Research supported by the U.S. Department of Energy
Astronomy and Astrophysics
Astrophysics
48
Hot Stars, Nebulae, Stellar Evolution, Stellar Spectrophotometry, Supernova Remnants, Early Stars, Electrophotometers, Stellar Luminosity, Stellar Magnitude, Stellar Temperature, Subdwarf Stars, Ubv Spectra
Scientific paper
Results of a search for a blue object representing the remnant star of the supernova of 1006 A.D. are reported. The search was conducted using trailed prime-focus plates to detect optical pulsations of moderately bright stars and two-color plates to look for an unusually blue object. Although no object pulsing at between 0.1 and 8 Hz with a peak B magnitude brighter than 16.3 was detected, one very blue star was discovered on the two-color plates 2.45 arcmin from the center. Spectroscopy and photoelectric photometry in the UBVR of the blue star indicates an effective temperature of 38,500 + or - 4500 K, and absolute visual magnitude of 6.2 + or - 1.8, an interstellar reddening of 0.32 + or - 0.10, a distance of 1.1 kpc, a radial velocity of -14 km/sec and an upper limit of 320 km/sec on the transverse velocity. The star is classified as transitional between an O or a B subdwarf of high gravity and a WD star, with a temperature and location consistent with the remnant of the 1006 supernova.
Middleditch John
Schweizer Francois
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