Issue |
A&A
Volume 382, Number 1, JanuaryIV 2002
|
|
---|---|---|
Page(s) | 291 - 300 | |
Section | The Sun | |
DOI | https://doi.org/10.1051/0004-6361:20011606 | |
Published online | 15 January 2002 |
A new candidate supernova remnant in Cygnus
1
University of Crete, Physics Department, PO Box 2208, 710 03 Heraklion, Crete, Greece
2
ASTRON, Radiosterrenwacht, Postbus 2, 7990 AA Dwingeloo, The Netherlands
3
Astronomical Institute, University of Amsterdam, The Netherlands
Corresponding author: F. Mavromatakis, fotis@physics.uoc.gr
Received:
17
July
2001
Accepted:
9
November
2001
Deep optical CCD imaging and spectroscopic observations of four new nebular
structures have been performed for the first time.
Filamentary and diffuse emission is detected in this field located
to the north–east of the CTB 80 supernova remnant (SNR).
Two long filaments are discovered to the north of LBN 156, while
a 23´ long filament, emitting strongly in the [
] line, is present
to the east of LBN 156. A complex and compact network of filaments
is located close to the center of our field.
Finally, the last new source of line emission detected in this field is
mainly diffuse and patchy and its morphology displays a semi–circular
shape. The long–slit spectra of these structures indicate emission from
shock–heated gas and the observed variations in the [
] fluxes most
likely reflect differences in the shock velocities.
Weak radio emission at 4850 MHz
seems correlated with almost all of the new structures.
It is proposed that all these structures, with the possible
exception of the brightest one, are part of a single supernova remnant.
Detailed radio observations should allow the determination
of the nature of the radio emission and provide a crucial test of our
suggested intepretation.
Key words: ISM: general / ISM: supernova remnants
© ESO, 2002
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