Volume 371, Number 1, May III 2001
|Page(s)||300 - 311|
|Published online||15 May 2001|
The peculiar supernova remnant CTB 80
University of Crete, Physics Department, PO Box 2208, 710 03 Heraklion, Crete, Greece
2 Foundation for Research and Technology-Hellas, PO Box 1527, 711 10 Heraklion, Crete, Greece
3 Max Planck Institut für Extraterrestrische Physik, 85741 Garching, Germany
Corresponding author: F. Mavromatakis, firstname.lastname@example.org
Accepted: 2 March 2001
Deep CCD exposures of the peculiar supernova remnant CTB 80 in the light of the HNii ], [Sii ], [Oii ], and [Oiii ] filters have been obtained. These images reveal significant shock heated emission in the area of the remnant. An extended bright diffuse nebula in the south-east part of CTB 80 overlaps soft X-ray emission from ROSAT but it does not appear to be related to the remnant under study. New diffuse and filamentary structures are detected to the south, south-east, and north of PSR 1951+32, most likely associated with CTB 80. Especially, the sulfur line image shows emission in the north along the outer boundary of the IRAS and HI shells. The [Oiii ] emission is filamentary, suggesting shock velocities greater than 100 km s-1 but its spatial extent is quite limited. Lower shock velocities are expected in the north and north-east areas of the remnant, since [Oii ] emission is present, while [Oiii ] line emission is not detected. The comparison between the [Oiii ] and [Oii ] line images further suggest the presence of significant inhomogeneities in the interstellar medium. The flux-calibrated images do not indicate the presence of incomplete recombination zones, and we estimate that the densities of the preshock clouds should not exceed a few atoms per cm3. The typical projected angular widths of the observed filaments are ~30´´. Typical surface brightness values of the long [Oiii ] filament in the south are ~12 10-17 erg s-1 cm-2 arcsec-2 while the [Oii ] image is characterized by fluxes of 10-20 10-17 erg s-1 cm-2 arcsec-2. The area covered by the optical radiation along with the radio emission at 1410 MHz suggest that CTB 80 occupies a larger angular extent than was previously known.
Key words: ISM: general / ISM: supernova remnants / ISM: individual objects: CTB 80
© ESO, 2001
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.