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For refcode 1990MNRAS.242p...4B:
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Copyright by Royal Astronomical Society. 1990MNRAS.242p...4B Broad infrared line emission from the nuclei of Seyfert 2 galaxies Philip R. Blanco Department of Astronomy, University of Edinburgh, Blackford Hill, Edinburgh EH9 3HJ Martin J. Ward Institute of Astronomy, Madingley Road, Cambridge CB3 0HA Gillian S. Wright Joint Astronomy Centre, 605 Komohana Street, Hilo, HI 96720, USA Accepted 1989 October 5. Received 1989 October 4 SUMMARY We report spectroscopic observations at {lambda}/{delta}{lambda} ~300 of the Paschen {beta} hydrogen recombination line in the narrow line X-ray galaxies NGC 5506 and A0945-30 (=MCG-5-23-16), and in the Seyfert 2 galaxy NGC 4388. The line profiles NGC 5506 and A0945-30 are both found to possess broad components of FWHM > 1500 km s^-1^; this removes the previous controversy concerning the presence of broad line components in their H{alpha} line profiles. We use optical, X-ray and mid-infrared data to estimate the extinction towards the line and continuum sources in these objects in order to test the hypothesis that they are in fact moderately obscured Seyfert 1 nuclei. The non-detection of a broad Paschen {beta} line profile in NGC 4388 is consistent with a scattered (as opposed to a transmitted) origin for the observed off-nuclear broad H{alpha} emission, in agreement with models of the optical emission-line geometry in this galaxy.
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