Published by
EDP Sciences
EDP Sciences Journals List
Subscriber Authentication Point
Home All issues Volume 405/ 2 Article
Free access
Issue A&A
Volume 405, Number 2, July II 2003
Page(s) 591 - 596
Section Formation, structure and evolution of stars
DOI http://dx.doi.org/10.1051/0004-6361:20030603



A&A 405, 591-596 (2003)
DOI: 10.1051/0004-6361:20030603

The faint supernova remnant G 34.7-0.4 (W44)

F. Mavromatakis1, P. Boumis2 and C. D. Goudis2, 3

1  University of Crete, Physics Department, PO Box 2208, 710 03 Heraklion, Crete, Greece
2  Institute of Astronomy & Astrophysics, National Observatory of Athens, I. Metaxa and V. Pavlou, P. Penteli, 15236 Athens, Greece
3  Astronomical Laboratory, Department of Physics, University of Patras, 26500 Rio-Patras, Greece

(Received 11 March 2003 / Accepted 18 April 2003 )

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 H $\alpha+[$ $\ion{N}{ii}$ ] fluxes are ~8  $\times$ 10-17 erg s -1 cm -2 arcsec -2, while the [ $\ion{S}{ii}$ ] fluxes are lower around 4  $\times$ 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 [ $\ion{S}{ii}$ ] and [ $\ion{N}{ii}$ ] emission relative to H $\alpha$ 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.


Key words: ISM: general -- ISM: supernova remnants -- ISM: individual objects: G 34.7-0.4

Offprint request: F. Mavromatakis, fotis@physics.uoc.gr

SIMBAD Objects



© ESO 2003

What is OpenURL?

The OpenURL standard is a protocol for transmission of metadata describing the resource that you wish to access. An OpenURL link contains article metadata and directs it to the OpenURL server of your choice. The OpenURL server can provide access to the resource and also offer complementary services (specific search engine, export of references...). The OpenURL link can be generated by different means.
  • If your librarian has set up your subscription with an OpenURL resolver, OpenURL links appear automatically on the abstract pages.
  • You can define your own OpenURL resolver with your EDPS Account. In this case your choice will be given priority over that of your library.
  • You can use an add-on for your browser (Firefox or I.E.) to display OpenURL links on a page (see http://www.openly.com/openurlref/). You should disable this module if you wish to use the OpenURL server that you or your library have defined.