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J/A+A/279/541 Submillimeter obs of shocked molecular (Van Dishoek+ 1993)
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Submillimeter observations of the shocked molecular gas associated with
the supernova remnant IC 443
Van Dishoeck E.F., Jansen D.J., Phillips T.G.
<Astron. Astrophys. 279, 541 (1993)>
=1993A&A...279..541V
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ADC_Keywords: Supernova remnants ; Radio lines
Keywords: ISM : molecules - ISM : supernova remnants -
ISM: individual objects: IC 443 - shock waves -
radio lines : interstellar
Abstract:
Submillimeter observations of various simple molecules in the shocked
molecular gas associated with the supernova remnant IC 443 are presented.
CO 3-2 line profiles along the shocked ring are used to constrain the global
kinematics of the region. Searches for other molecules in the shocked
gas have been performed at two positions in clump G and one position in
clump B. High-frequency lines of HCO(+), HCN, HNC, CS, SO, SiO, H2CO
and C2H have been detected, and significant upper limits have been obtained
for various other, more complex molecules. The physical parameters in
the shocked gas have been derived from an analysis of the excitation of
these species. The observed abundances are substantially lower than those
found in one-fluid hydrodynamic shock models with a small H/H2 ratio,
but appear consistent with the limited models in which H/H2 is significant.
Objects:
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RA (2000) DE Designation(s)
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06 16.0 +22 24 IC 443 = SNR 189.0+03.0 = 3C 157
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1 67 57 Observations and fits of IC 443 G I
table2 67 23 Observations and fits of IC 443 G II
table3 67 50 Observations and fits of IC 443 B
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Note on table1:
a: upper limits are 2 sigma values in 1 MHz bandwidth
Preshock and shocked emission cannot be distinguished; about 20 % of
the integrated emission is estimated to be due to the preshocked gas.
Note on table3:
DV is kept fixed at 12, 20 and 20 km/s in the fit to those
profiles that show multiple components.
Byte-by-byte Description of file: table1, table2, table3
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Bytes Format Units Label Explanations
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1- 7 A7 --- Species Ion or molecule name
12- 22 A11 --- Transit Transition levels upper-lower
24- 29 I6 MHz Freq Frequency
31 A1 --- l_T(MB) '<' if T(MB) is an upper limit
(upper limits are 2 sigma values in 1 MHz
bandwidth)
32- 36 F5.2 K T(MB) ?Main beam temperature
40- 44 F5.1 km/s V(LSR) ?Velocity
47- 50 F4.1 km/s DV ?FWHM of line
53- 57 F5.1 K.km/s W ?Main beam temperature integrated over profile
59 A1 --- Note Remark (see above)
61- 68 A8 --- Obs Telescope and Year of observation
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(End) Francois Ochsenbein [CDS] 20-Jul-1993