2001A&A...371..300M


Query : 2001A&A...371..300M

2001A&A...371..300M - Astronomy and Astrophysics, volume 371, 300-311 (2001/5-3)

The peculiar supernova remnant CTB 80.

MAVROMATAKIS F., VENTURA J., PALEOLOGOU E.V. and PAPAMASTORAKIS J.

Abstract (from CDS):

Deep CCD exposures of the peculiar supernova remnant CTB 80 in the light of the Hα+[NII], [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 100km/s 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 ∼12x10–17erg/s/cm2/arcsec2 while the [OII] image is characterized by fluxes of 10-20x10–17erg/s/cm2/arcsec2. The area covered by the optical radiation along with the radio emission at 1410MHz suggest that CTB 80 occupies a larger angular extent than was previously known.

Abstract Copyright:

Journal keyword(s): ISM: general - ISM: supernova remnants - ISM: individual objects: CTB 80

Simbad objects: 3

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Number of rows : 3
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 SNR G068.8+02.6 SNR 19 52 55 +32 54.2           ~ 340 1
2 LBN 069.48+02.29 HII 19 57 +33.2           ~ 4 0
3 LBN 069.80+01.74 HII 20 00 +33.2           ~ 4 0

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2022.08.10-13:04:02

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