Deep optical observations of G 65.3+5.7
Abstract
We present the first CCD mosaic of the supernova remnant G 65.3+5.7 in the optical emission lines of [O II] and [O III]. The new images reveal several diffuse and filamentary structures both inside and outside the extent of the remnant as defined by its X-ray and radio emission. The medium ionization line of [O III] 5007 provides the sharpest view to the system, while the remnant appears less filamentary in the emission line of [O II]. There are significant morphological differences between the two images strongly suggesting the presence of incomplete shock structures. Deep long-slit spectra were taken at several different positions of G 65.3+5.7. All spectra originate from shock heated gas, while the majority of them is characterized by large [O III]/Hbeta ratios. The sulfur line ratios indicate electron densities below ~200 cm^{-3}, while estimates of the shock velocities lie in the range of 90-140 km/s. Finally, the observed variations of the Halpha/Hbeta ratios may reflect the presence of intrinsic absorption affecting the optical spectra.
Cite
@article{arxiv.astro-ph/0204079,
title = {Deep optical observations of G 65.3+5.7},
author = {Fotis Mavromatakis and Panayotis Boumis and John Papamastorakis and Joseph Ventura},
journal= {arXiv preprint arXiv:astro-ph/0204079},
year = {2009}
}
Comments
10 pages, 4 figures, accepted for publication in A&A