Statistics – Computation
Scientific paper
Nov 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979apj...234..174f&link_type=abstract
Astrophysical Journal, Part 1, vol. 234, Nov. 15, 1979, p. 174-181. Research supported by the Alfred P. Sloan Foundation
Statistics
Computation
6
Emission Spectra, Milky Way Galaxy, Nebulae, Spectroscopic Telescopes, Supernova Remnants, Gratings (Spectra), Neutron Stars, Slits, Stellar Envelopes, Stellar Evolution, Stellar Mass Ejection
Scientific paper
The slitless spectra of the stars in the central regions of six galactic supernova remnants Cas A, Kepler, Tycho, SN 1006, RCW 86, and the Cygnus Loop were obtained with the prime focus transmission gratings at the 4M telescopes on Kitt Peak and Cerro Tololo. It was found that no stellar remnant with an unusually blue or peculiar spectrum is present in any of the remnants down to the limit of mpg of 18.5. Except for the Cygnus Loop, the area searched in each remnant is large enough that objects with transverse velocities of 1000 km/s would be well within the field. The results are also compared with a computation of emission from gas near a neutron star and with the unpulsed emission from the Crab pulsar; in both cases upper limits were set which place constraints on a possible condensed stellar remnant.
Fesen Robert A.
Kirshner Robert P.
Winkler Frank Jr. P.
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