Issue |
A&A
Volume 385, Number 3, April III 2002
|
|
---|---|---|
Page(s) | 1042 - 1048 | |
Section | The Sun | |
DOI | https://doi.org/10.1051/0004-6361:20020185 | |
Published online | 15 April 2002 |
First optical light from the supernova remnant G 17.4-2.3
1
University of Crete, Physics Department, PO Box 2208, 710 03 Heraklion, Crete, Greece
2
Foundation for Research and Technology-Hellas, PO Box 1527, 711 10 Heraklion, Crete, Greece
Corresponding author: P. Boumis, ptb@physics.uoc.gr
Received:
19
November
2001
Accepted:
29
January
2002
Deep optical CCD images of the supernova remnant G 17.4–2.3 were
obtained and faint emission has been discovered therein. The images, taken in
the emission lines of
H
], [S ii] and [
], reveal filamentary structures in the
east, south–east area, while diffuse emission in the south and
central regions of the remnant is also present. The radio emission in
the same area is found to be well correlated with the brightest
optical filament. The flux calibrated images suggest that the
optical filamentary emission originates from shock-heated gas, while the diffuse emission seems to
originate from an
region ([S ii]/Hα
< 0.3). Furthermore,
deep long–slit spectra were taken at the bright [
] filament and
clearly show that the emission originates from shock heated gas. The
[
] flux suggests shock velocities into the interstellar
clouds” greater than 100 km s-1, while the [
ratio indicates
electron densities ~240 cm-3. Finally, the Hα emission has
been measured to be between 7 to 20
10-17 erg s-1 cm-2 arcsec-2.
Key words: ISM: general / ISM: supernova remnants / ISM: individual objects: G 17.4–2.3
© ESO, 2002
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.