Eales, Stephen Anthony  ORCID: https://orcid.org/0000-0002-7394-426X, Becklin, E. E., Hodapp, K. W., Simons, D. A. and Wynn-Williams, C. G.
1990.
The subarcsecond infrared structures at the centers of infrared-luminous galaxies.
Astrophysical Journal
365
, pp. 478-486.
10.1086/169502
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Abstract
This paper presents 1.6-2.2-micron imaging observations of the centers of nine galaxies with high 60-100-micron luminosities. Eight of the nine galaxies contain central 2.2-micron sources that are larger than the point spread function, which typically had a size (FWHM) of 1.0 arcsec. The typical physical size of the 2.2-micron sources is about 0.5 kpc. One of the galaxies (NGC 6240) contains a double source, with the components having a similar separation (about 1.5 arcsec) and position angle to the radio and optical components. The central regions of six out of the nine galaxies have 2.2-micron surface brightnesses that are equal to or greater than the maximum 2.2-micron central surface brightness of a sample of optically selected galaxies. The H-K colors of the central regions of the infrared-luminous galaxies are about 0.5 mag redder than the colors of the central regions of optically selected galaxies. The result that the nuclear 2.2-micron sources in almost all of the galaxies are extended is evidence that most of the 2.2-micron emission is from sources other than active nuclei.
| Item Type: | Article |
|---|---|
| Date Type: | Publication |
| Status: | Published |
| Schools: | Schools > Physics and Astronomy |
| Subjects: | Q Science > QB Astronomy |
| Uncontrolled Keywords: | galactic nuclei; infrared astronomy; infrared sources (astronomy); brightness distribution; infrared astronomy satellite; point spread functions |
| Publisher: | IOP Science |
| ISSN: | 0004-637X |
| Last Modified: | 24 Oct 2022 11:19 |
| URI: | https://orca.cardiff.ac.uk/id/eprint/47705 |
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