Hostname: page-component-7bb8b95d7b-495rp Total loading time: 0 Render date: 2024-10-01T14:28:06.880Z Has data issue: false hasContentIssue false

Radio Emission from High Redshift Galaxies: VLA Observations of the Hubble Deep Field

Published online by Cambridge University Press:  25 May 2016

E.A. Richards*
Affiliation:
University of Virginia & NRAO

Extract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

To study galaxy populations and their evolution at the highest possible redshifts, a small area of the sky, the Hubble Deep Field (HDF) was imaged to an unprecedented sensitivity of R = 29.5 (Williams et al. 1996). As a complement to the HST observations, we have used the VLA at 8 GHz to image an area 5.′4 in diameter (FWHM) centered on the HDF to an rms sensitivity of 2 μJy. With a radio resolution of about 3″, we have 33 sources above 9.5 μJy, seven in the 4 arcmin2 HDF field of which six have clear optical IDs. There are an additional 12 IDs in the HST flanking fields. The optical counterparts of the radio sources are a mixture of ellipticals, spirals, and irregulars, consistent with earlier surveys of comparable depth (Windhorst et al. 1995). With a median redshift <z> ∼ 1, the radio galaxies we are sampling are somewhat more distant than the classical starbursting galaxies which dominate less sensitive radio surveys. Our HDF identifications are predominately with post-starburst galaxies, moderate power AGN, and blue irregulars (Fomalont et al. 1996).

Type
Part 6. Large Scale Structure
Copyright
Copyright © Kluwer 1998 

References

Cowie, L. L. et al. 1996, Astron. J. submitted.Google Scholar
Fomalont, E. B., et al. 1996, Astrophys. J. Lett. in press.Google Scholar
Steidel, E. et al. 1996, Astrophys. J. Lett. 462, 17.Google Scholar
Williams, R. et al. 1996, Astron. J. in press.Google Scholar
Windhorst, R. A., et al. 1995, Nature 375, 471.Google Scholar