NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-06-18 T02:45:03 PDT
Help | Comment | NED Home

For refcode 1992MNRAS.254..509F:
Retrieve 22 NED objects in this reference.
Please click here for ADS abstract

NED Abstract

Copyright by Royal Astronomical Society. 1992MNRAS.254..509F Near-infrared images of LINER and starburst galaxies Duncan A. Forbes, Martin J. Ward, D. L. DePoy, Catherine Boisson and M. S. Smith Institute of Astronomy, Madingley Road, Cambridge CB3 OHA Department of Physics, Nuclear Physics Laboratory, Keble Road, Oxford OX1 3RH Astronomy Department, Ohio State University, Columbus, OH 43210, USA Cerro Tololo Inter-American Observatory, Casilla 603, La Serena, Chile Observatoire de Paris, 5, Place Jules Janssen, F-92195 Meudon Cedex, France Joint Astronomy Centre, 665 Komohana Street, Hilo, HI 96720, USA Accepted 1991 September 16. Received 1991 September 11; in original form 1991 August 1 SUMMARY We present near-infrared observations of the nuclei of 22 LINER and starburst galaxies. Most of the galaxies that make up our sample exhibit a smooth regular near-infrared structure. A few show more complex morphologies with `hotspots'. Colour index maps indicate the combined effects of dust obscuration, emission from hot dust, and stellar population gradients. We describe a method, based on a generalized Gaussian fit to the galaxy profile, which estimates the flux due to a point source within the galaxy. This method provides an alternative to traditional procedures for estimating the nuclear component, irrespective of whether this is due to a compact cluster of stars or an obscured Seyfert nucleus. The nuclear near-infrared emission correlates with the soft X-rays and 6-cm radio emission. This is consistent with both star formation or a mini black hole as the source of the nuclear activity. Most of these galaxies have extended near-infrared emission. This strongly supports a starlight and/or thermal dust origin for the emission. We predict that in many cases the X-ray emission will also be extended. From this study there is no strong evidence at near-infrared wavelengths to support the idea that LINER and starburst galaxies harbour black holes at their centres.
Retrieve 22 NED objects in this reference.
Please click here for ADS abstract

Back to NED Home