Study of the interacting system NGC 6845

Rodrigues, I., Dottori, H., Brinks, E. and Mirabel, F. (1999) Study of the interacting system NGC 6845. The Astronomical Journal, 117 (6). pp. 2695-2708. ISSN 0004-6256
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We present optical spectroscopy, B, V , R, and I CCD photometry, and VLA neutral hydrogen observations of the interacting quartet NGC 6845, also know as Klemola 30. NGC 6845 A, the dominant component, sports a broad and bright tidal bridge and a faint tidal tail, which bifurcates. The tidal bridge has a B[I color bluer than that of the inner disk of NGC 6845 A. Five strong condensations, identified as H II regions brighter than the brightest one known in our Galaxy, are found along the tidal bridge, with the two most luminous located at the bridge tip. Two giant H II regions, comparable to 30 Dor, are located where the tidal bridge and the tidal tail join the disk of NGC 6845 A.


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