1999/06/30 by E. Gaztañaga, E. Gaztanaga, Gavin Dalton +1 · 3 citations
Engineering · Physics and Astronomy · #Adaptive optics and wavefront sensing #Astronomy #Astrophysics #CCD and CMOS Imaging Sensors #Galaxy #Magnitude (astronomy) #Photometry (optics) #Physics #Position angle #Redshift #Sky #Stars #Stellar, planetary, and galactic studies #astro-ph
paper · pdf · doi:10.1046/j.1365-8711.2000.03139.x
published as Mon.Not.Roy.Astron.Soc. 312 (2000) 417 · Full size figures can be found in http://www.ieec.fcr.es/cosmo-www/zwicky.ps Version accepted for publication in MNRAS. Extended discussion on properties of nearby galaxies. References added. An inconsistency in the R band isophote used has been corrected. Main results and conclusions are unchanged
arxiv created 1999/10/11 · openalex publication_date 2000/02/21 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We present CCD (charge-coupled device) photometry for galaxies around 204 bright (mZ<15.5) Zwicky galaxies in the equatorial extension of the APM Galaxy Survey, sampling an area over 400 deg2, which extends 6 h in right ascension. We fit a best linear relation between the Zwicky magnitude system, mZ, and the CCD photometry, BCCD, by doing a likelihood analysis that corrects for Malmquist bias. This fit yields a mean scale error in Zwicky of 0.38 mag mag−1: i.e. ΔmZ≃(0.62±0.05)ΔBCCD and a mean zero-point of 〈BCCD−mZ〉=−0.35±0.15 mag. The scatter around this fit is about 0.4 mag. Correcting the Zwicky magnitude system with the best-fitting model results in a 60 per cent lower normalization and 0.35-mag brighter M* in the luminosity function. This brings the CfA2 luminosity function closer to the other low-redshift estimations (e.g. Stromlo-APM or LCRS). We find a significant positive angular correlation of magnitudes and position in the sky at scales smaller than about 5 arcmin, which corresponds to a mean separation of 120 h−1 kpc. We also present colours, sizes and ellipticities for galaxies in our fields, which provides a good local reference for the studies of galaxy evolution.