Hostname: page-component-cd9895bd7-lnqnp Total loading time: 0 Render date: 2024-12-26T04:12:05.453Z Has data issue: false hasContentIssue false
  • English
  • Français

A Redshift Survey of Very Faint (B≤22.5) Field Galaxies, Radio Sources, and Quasars

Published online by Cambridge University Press:  04 August 2017

David C. Koo
David C. Koo*
Affiliation:
Department of Terrestrial Magnetism, Carnegie Institution of Washington, Washington, D. C. USA 20015

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.

As part of a three year program to study the evolution of galaxies, quasars, and radio sources (in collaborations with R. Kron and R. Windhorst), we will use over 30 nights on the KPNO 4-m CCD Cryogenic Camera System, in the multi-aperture mode, to measure the redshifts of several hundred very faint objects. These will be selected from four fields (SA68 00h+15; Lynx 08h+45; SA57 13h+30; Herc 17h+50); for each we possess 4-m plates in four bandpasses (limits: U≃23, B≃24, V≃23, I≃21) as well as Westerbork interferometer maps to 1 mJy at 21cm (a 50cm survey is in progress). Galaxies are selected randomly by their apparent red magnitudes as measured with a PDS; quasar candidates to B≈22.5 by stellar objects which lie apart from Galactic stars in the multi-color diagram; and radio sources by their positional coincidence with optical images (∼50% of the 300 radio sources are identified). To date, 10 nights have produced spectra of ∼250 field galaxies, ∼20 radio sources, and ∼40 quasar candidates.

Type
Research Article
Information
Symposium - International Astronomical Union , Volume 104: Early Evolution of the Universe and Its Present Structure , 1983 , pp. 105 - 106
Copyright
Copyright © Reidel 1983 

References

Braccesi, A., Zitelli, V., Bónoli, F., Formagginni, L.: 1980, Astron. Astrophys. 85, pp. 80–92.Google Scholar
Bruzual, G.A.: 1981, , Univ. of Calif., Berkeley Google Scholar
Koo, D.C.: 1981, , Univ. of Calif., Berkeley Google Scholar
Koo, D.C., Kron, R.G.: 1982, Astron. Astrophys. 105, pp. 107–119.Google Scholar