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Optical imagery and spectrophotometry of CTB 80Narrow-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.
Document ID
19890050340
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Hester, J. Jeff (California Inst. of Tech. Pasadena, CA, United States)
Kulkarni, Shrinivas R. (California Institute of Technology Pasadena, United States)
Date Acquired
August 14, 2013
Publication Date
May 1, 1989
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 340
ISSN: 0004-637X
Subject Category
ASTROPHYSICS
Funding Number(s)
CONTRACT_GRANT: NAS5-25451
Distribution Limits
Public
Copyright
Other