Ghosh, S. K. ; Bisht, R. S. ; Iyengar, K. V. K. ; Rengarajan, T. N. ; Tandon, S. N. ; Verma, R. P. (1992) Far-infrared observations of NGC 4945 and the Circinus galaxy The Astrophysical Journal, 391 (1). pp. 111-120. ISSN 0004-637X
Full text not available from this repository.
Official URL: http://adsabs.harvard.edu/abs/1992ApJ...391..111G
Related URL: http://dx.doi.org/10.1086/171328
Abstract
The study reports observations of NGC 4945 and the Circinus galaxy carried out with a 1-m balloon-borne FIR telescope. Pointed observations of IRAS, using survey detectors, were deconvolved to get higher angular resolution intensity maps at 12, 25, 60, and 100 microns, respectively, for both galaxies. In NGC 4945, the nucleus was found to be cooler than its immediate surroundings. Whereas both galaxies show a prominent central source, only NGC 4945 shows extended disk emission in all bands. The central source in both galaxies was found to be somewhat more extended than a point source at wavelengths 50 microns or greater, the resulting deconvolved size being about 40 arcsec. The 150-micron upper limit for the Circinus galaxy implies a steeper wavelength dependence of dust emissivity than is the case for NGC 4945.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to University of Chicago Press. |
| Keywords: | Far Infrared Radiation; Galactic Nuclei; Infrared Astronomy; Spiral Galaxies; Astronomical Photometry; Balloon-borne Instruments; Cosmic Dust; Infrared Astronomy Satellite; Infrared Telescopes |
| ID Code: | 51663 |
| Deposited On: | 29 Jul 2011 04:23 |
| Last Modified: | 15 Jul 2012 10:54 |
Repository Staff Only: item control page
