Redshift--Independent Distances of Spiral Galaxies: I. The Survey

Details Redshift--Independent Distances of Spiral Galaxies: I. The Survey Redshift--Independent Distances of Spiral Galaxies: I. The Survey

Dec 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993aas...183.7211s&link_type=abstract

American Astronomical Society, 183rd AAS Meeting, #72.11; Bulletin of the American Astronomical Society, Vol. 25, p.1403

Statistics

Applications

Scientific paper

In order to gain a more detailed mapping of the relative distribution of luminous and non--luminous matter in the local universe, I--band CCD images and HI 21 cm line profiles have been obtained for a sample of over 1800 inclined Sbc--Sc galaxies north of declination --42(deg) with cz < 7500 kms(-1) . Distance--dependent angular diameter selection criteria were applied in defining the sample, in the sense that the minimum diameter allowed for a sample galaxy decreases with increasing distance. This has the effect of keeping the population of galaxies sampled in each redshift shell of constant thickness relatively uniform over the entire velocity range surveyed. Particular attention has been paid to the uniformity of the data reduction procedures and the accurate estimation of the photometric and velocity--width errors. The HI line width measurements employ a new algorithm developed specifically to optimize the measurement for Tully--Fisher applications. This algorithm was used to remeasure all existing data by applying it to HI profiles which were subjected to far less smoothing than has traditionally been employed. Final reduction includes the derivation of various photometric parameters such as ellipticity, scale length, isophotal radii and total magnitudes, as well as recessional velocity and velocity width. Characteristics of the sample are discussed in detail, including possible selection biases, data reduction procedures and quality of the photometry. We also discuss how this sample combines with pre--existing ones to provide a uniform all--sky coverage.

Affiliated with

Also associated with

No associations

Rating

Redshift--Independent Distances of Spiral Galaxies: I. The Survey does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Redshift--Independent Distances of Spiral Galaxies: I. The Survey, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Redshift--Independent Distances of Spiral Galaxies: I. The Survey will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-779887