Optical imagery and spectrophotometry of CTB 80

Details Optical imagery and spectrophotometry of CTB 80 Optical imagery and spectrophotometry of CTB 80

May 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989apj...340..362h&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 340, May 1, 1989, p. 362-378. Research supported by the California Institut

Astronomy and Astrophysics

Astrophysics

22

Nebulae, Spectrophotometry, Supernova Remnants, Balmer Series, Oxygen, Photoionization, Radio Emission, Shock Waves, Silicon

Scientific paper

Narrow-band imagery and spectrophotometry of the central region of CTB 80 are presented. The images show weak forbidden O III and ubiquitous filamentary forbidden S II and H-alpha emission from the extended radio lobes in which the core is embedded. The data indicate that the extended component is shock heated. Balmer line-dominated emission is observed around the perimeter of the core. Assuming that the volume of the radio shell is similar to the volume of the thermal shell, it is found that a magnetic field of about 600 microG and a cosmic-ray proton-to-electron ratio of about 200 are required to explain the pressure and synchrotron volume emissivity in the radio shell. It is suggested that the optical emission form the core of CTB 80 arises behind shocks which are being driven into a magnetized thermal plasma by the confined relativistic wind from PSR 1951+32.

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