A new candidate supernova remnant G 70.5+1.9

¹ Technological Education Institute of Crete, Department of Sciences, PO Box 1939, 710 04 Heraklion, Crete, Greece e-mail: fotis@stef.teicrete.gr
² Institute of Astronomy & Astrophysics, National Observatory of Athens, I. Metaxa & V. Pavlou, P. Penteli, 15236 Athens, Greece e-mail: ptb@astro.noa.gr
³ Jodrell Bank Centre for Astrophysics, University of Manchester, Manchester M13 9PL, UK e-mail: jmeaburn@jb.man.ac.uk
⁴ Department of Astronomy, University of Illinois at Urbana-Champaign, 1002 West Green Street, Urbana, IL 61801-3080, USA e-mail: caulet@astro.uiuc.edu

Received: 26 March 2009
Accepted: 18 May 2009

Abstract

A compact complex of line emission filaments in the galactic plane has the appearance of those expected of an evolved supernova remnant, although non-thermal radio and X-ray emission have not yet been detected. This optical emission line region has now been observed with deep imagery and both low and high-dispersion spectroscopy. Diagnostic diagrams of the line intensities from the present spectra and the new kinematical observations both point to a supernova origin. However, several features of the nebular complex still require an explanation within this interpretation.