Longslit Spectra of HCG 95c: Evidence for H II Regions

Details Longslit Spectra of HCG 95c: Evidence for H II Regions Longslit Spectra of HCG 95c: Evidence for H II Regions

May 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993aas...182.0622r&link_type=abstract

American Astronomical Society, 182nd AAS Meeting, #06.22; Bulletin of the American Astronomical Society, Vol. 25, p.801

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We report extended H-alpha emission in the red spectrum of spiral galaxy HCG 95c. The longslit spectra that we obtained for this galaxy extends from 5500 to 9500 Angstroms with a mean spectral resolution of ~ 14 Angstroms. The slit length of ~ 200 '' was ideally suited for studying the spatial distribution of emission features. Spectra were obtained with a slit orientated North-South, centered on the nucleus, parallel to the galaxy's northern spiral arm. The spectrum of HCG 95c shows redshifted H-alpha+[N II] and [S II] emission lines indicative of a LINER type AGN. Spatial profiles extracted from the spectra show extended H-alpha emission being emitted by H II regions in the northern spiral arm, while the equivalent profiles for strong lower excitation forbidden lines of [N II] and [S II] are confined to the nuclear region. Morphologically, HCG 95c is interacting with the brightest member of the group (HCG 95a). The spatial profiles suggest non-nuclear starburst activity triggered by tidal forces, while the nuclear spectrum indicates non-thermal activity. This Hickson Compact Group interacting pair could be in the early stages of merging. The observations were obtained at the UAO 61-inch telescope, Mt. Bigelow, AZ using the LPL longslit spectrometer in combination with an off-axis CCD camera guider system.

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