Abstract
view Abstract Citations (17) References (14) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Imaging and Spectroscopic Studies of the Interacting System Markarian 171 Friedman, Scott D. ; Cohen, Ross D. ; Jones, B. ; Smith, Harding E. ; Stein, W. A. Abstract V, R, and I broadband CCD images, as well as H-alpha spectroscopic observations of Markarian 171, are presented. Two apparently interacting dust-enshrouded galaxies exhibit relatively normal V-R, V-I galactic stellar-population colors in their outer regions, and spatially extended H-alpha emission. However, the dereddened colors imply a hot stellar population. The dual characteristics of narrow H-alpha lines and spatially extended H-alpha emission clearly distinguish this type of activity from that associated with the compact central regions of active galactic nuclei and QSOs. Apparently, in the case of Mk 171 the interaction has induced star formation throughout a significant fraction of the galaxy (kiloparsecs) - not just in the immediate vicinity of the nucleus (parsecs). A peculiar stellar population of hot stars associated with a knot of weak H-alpha emission appears spatially separate from the other emission-line regions. It is possible that this stellar knot is a severed remnant attributable to the gravitational interaction between the two galaxies. Publication: The Astronomical Journal Pub Date: December 1987 DOI: 10.1086/114581 Bibcode: 1987AJ.....94.1480F Keywords: Astronomical Spectroscopy; Charge Coupled Devices; Emission Spectra; Gravitational Effects; H Alpha Line; Markarian Galaxies; Hot Stars; Spectral Energy Distribution; Star Distribution; Stellar Color; Astronomy; RADIO SOURCES: GALAXIES full text sources ADS | data products SIMBAD (7) NED (5)
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