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Title:
The faint supernova remnant G 34.7-0.4 (W44)
Authors:
Mavromatakis, F.; Boumis, P.; Goudis, C. D.
Affiliation:
AA(University of Crete, Physics Department, PO Box 2208, 710 03 Heraklion, Crete, Greece), AB(Institute of Astronomy & Astrophysics, National Observatory of Athens, I. Metaxa and V. Pavlou, P. Penteli, 15236 Athens, Greece), AC(Institute of Astronomy & Astrophysics, National Observatory of Athens, I. Metaxa and V. Pavlou, P. Penteli, 15236 Athens, Greece; Astronomical Laboratory, Department of Physics, University of Patras, 26500 Rio-Patras, Greece)
Publication:
Astronomy and Astrophysics, v.405, p.591-596 (2003) (A&A Homepage)
Publication Date:
07/2003
Origin:
A&A
A&A Keywords:
ISM: general, ISM: supernova remnants, ISM: individual objects: G 34.7-0.4
DOI:
10.1051/0004-6361:20030603
Bibliographic Code:
2003A&A...405..591M

Abstract

Flux calibrated images of the known supernova remnant G 34.7-0.4 in basic optical emission lines are presented. The low ionization images show a relatively flat flux distribution. The diffuse and patchy morphology of the detected optical emission may indicate the presence of turbulent magnetic fields. Typical observed Hnii fluxes are ˜8 × 10-17 erg s-1 cm-2 arcsec-2, while the Sii fluxes are lower around 4 × 10-17 erg s-1 cm-2 arcsec-2. Emission in the medium ionization line of [ion {O}{iii}] 5007 Å is not detected within our sensitivity limits, probably due to the heavy extinction towards the remnant. The long-slit spectra reveal strong Sii and [ion {N}{ii}] emission relative to Ha and moderate [ion {O}i] 6300 Å emission. Shock velocities in the range of 110-150 km s-1 and low electron densities are estimated. Archival MSX infrared data show emission in the south and west areas of the remnant matching rather well the optical and radio emission.
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