Three-dimensional structure in field 349 of the southern sky survey. I - Redshifts for a magnitude-limited sample of galaxies from slit spectra

Details Three-dimensional structure in field 349 of the southern sky survey. I - Redshifts for a magnitude-limited sample of galaxies from slit spectra Three-dimensional structure in field 349 of the southern sky survey. I - Redshifts for a magnitude-limited sample of galaxies from slit spectra

Jun 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986mnras.220..901p&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 220, June 15, 1986, p. 901-925.

Astronomy and Astrophysics

Astronomy

14

Astronomical Spectroscopy, Emission Spectra, Galaxies, Red Shift, Sky Surveys (Astronomy), Southern Sky, Spatial Distribution, Galactic Clusters, Line Spectra, Radial Velocity, Spectral Correlation

Scientific paper

Redshifts are presented for a magnitude-limited sample (bj < 16.5) of 107 galaxies detected from scans with the COSMOS machine in the central 29 square degrees of the ESO/SERC southern sky survey field 349 (centred at 00h00m, -35°00', 1950 coordinates). Spectra at a dispersion of ˜210 Å mm-1 were obtained with the 1.9-m telescope of the South African Astronomical Observatory (SAAO), using the Image-tube Spectrograph and Reticon Photon Counting System (RPCS). Both cross-correlation techniques against filtered templates and direct measures of emission lines (if present) were used to obtain radial velocities to an accuracy of ˜75 km s-1. The observed sample represents a completeness of ˜80 per cent for all the galaxies detected by COSMOS down to bj=16.5 and provides a significant data base for analysis of the brighter end of the galaxy distribution in this field. The remaining unobserved galaxies were generally fainter than bj=16.0 although three were of low surface brightness. This survey, going ˜2.0 mag fainter than the CfA survey, is compatible with the Durham/AAT redshift survey (Shanks et al.) and should provide further insight into the nature of galaxy clustering.

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