Egami, E. and Armus, L. and Neugebauer, G. and Soifer, B. T. and Evans, A. S. and Murphy, T. W., Jr. (1999) The Nature of the Compact/Symmetric Near-IR Continuum Source in 4C 40.36. In: The Hy-Redshift Universe: Galaxy Formation and Evolution at High Redshift. Astronomical Society of the Pacific Conference Series. No.193. Astronomical Society of the Pacific , San Francisco, CA, pp. 86-89. ISBN 1-58381-019-6. https://resolver.caltech.edu/CaltechAUTHORS:20170221-111014799
![]() |
PDF
- Published Version
See Usage Policy. 288kB |
![]() |
PDF
- Accepted Version
See Usage Policy. 120kB |
Use this Persistent URL to link to this item: https://resolver.caltech.edu/CaltechAUTHORS:20170221-111014799
Abstract
Using NICMOS on HST, we have imaged the emission-line nebulae and the line-free continuum in 4C 40.36, a ultra-steep spectrum FR II radio galaxy at z = 2.269. The line-free continuum was found to be extremely compact and symmetric while the emission-line nebulae seen in Hɑ+[N II] show very clumpy structures spreading almost linearly over 16 kpc. However, this linear structure is clearly misaligned from the radio axis. The SED of the line-free continuum is very flat (ƒv ∝ v^(-0·5)), suggesting that if the continuum emission is produced by a single source, it is likely to be a young bursting stellar population or scattered AGN light. However, because of the lack of a line-free optical image with a comparable spatial resolution, we cannot exclude the possibility that the observed SED is a composite of a young blue population and an old red population.
Item Type: | Book Section | |||||||||
---|---|---|---|---|---|---|---|---|---|---|
Related URLs: |
| |||||||||
ORCID: |
| |||||||||
Additional Information: | © 1999 Astronomical Society of the Pacific. | |||||||||
Group: | Infrared Processing and Analysis Center (IPAC) | |||||||||
Series Name: | Astronomical Society of the Pacific Conference Series | |||||||||
Issue or Number: | 193 | |||||||||
DOI: | 10.48550/arXiv.9909517 | |||||||||
Record Number: | CaltechAUTHORS:20170221-111014799 | |||||||||
Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20170221-111014799 | |||||||||
Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | |||||||||
ID Code: | 74423 | |||||||||
Collection: | CaltechAUTHORS | |||||||||
Deposited By: | Ruth Sustaita | |||||||||
Deposited On: | 21 Feb 2017 19:41 | |||||||||
Last Modified: | 02 Jun 2023 01:32 |
Repository Staff Only: item control page