Astronomy and Astrophysics – Astronomy
Scientific paper
May 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995apjs...98..259l&link_type=abstract
Astrophysical Journal Supplement v.98, p.259
Astronomy and Astrophysics
Astronomy
47
Galaxy: Center, Ism: H Ii Regions
Scientific paper
We have mapped the sky field around Sagittarius C in the VLA B, C, and D-configurations at 1616 MHz, and mapped molecular gas in the immediate vicinity of Sgr C in the j = 1-0 line of 13CO. In the radiocontinuum this region is littered with shells and loops and several filaments (long, thin structures) aligned both along and across the Galactic plane. The most prominent object is Sgr C itself, a shell-like H II region; this is adjacent and seemingly connected to a twisted or braided nonthermal filament like that seen (on a finer and grander scale) in Sgr A. Higher resolution mapping of the Sgr C filament reinforces the impression that the same forces must act in both regions. A thermal feature seen projected against the Sgr C filament also has a striking analog in the "sickle" feature (GO.18-0.04) in Sgr A.
The molecular gas most obviously associated with Sgr C is seen around the radio recombination-line velocity of -65 km s-1; Sgr C itself appears to occupy a cavity within this (and perhaps other) material. The main body of this neutral gas (M359.5-0. 15) lies directly below Sgr C in Galactic latitude, abutting the (abrupt) southern terminus of the brightest portion of the Sgr C filament. FIR emission occurs at one edge of the Sgr C shell, adjacent to but just outside the molecular cloud, perhaps in a photodissociation region at the neutral-ionized gas boundary.
Liszt Harvey Steven
Spiker Robert W.
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