207 research outputs found
The K-band luminosity function of nearby field galaxies
We present a measurement of the K-band luminosity function (LF) of field
galaxies obtained from near-infrared imaging of a sample of 345 galaxies
selected from the Stromlo-APM Redshift Survey. The LF is well-fitted over the
ten magnitude range -26 < M_K < -16 by a Schechter function with parameters
alpha = -1.16 +- 0.19, M* = -23.58 +- 0.42, phi* = 0.012 +- 0.008 Mpc^-3
assuming a Hubble constant of H_0 = 100 km/s/Mpc. We have also estimated the LF
for two subsets of galaxies subdivided by the equivalent width of the Halpha
emission line at EW(Halpha) = 10A. There is no significant difference in LF
shape between the two samples, although there is a hint (~1 sigma significance)
that emission line galaxies (ELGs) have M* roughly one magnitude fainter than
non-ELGs. Contrary to the optical LF, there is no difference in faint-end slope
alpha between the two samples.Comment: 10 pages, 9 embedded figures, MNRAS, in press. Minor changes to
correspond to accepted versio
The APM Bright Galaxy Catalogue
The APM Bright Galaxy Catalogue lists positions, magnitudes, shapes and
morphological types for 14,681 galaxies brighter than magnitude 16.44
over a 4,180 square degree area of the southern sky. Galaxy and stellar images
have been located from glass copy plates of the United Kingdom Schmidt
Telescope (UKST) IIIaJ sky survey using the Automated Photographic Measuring
(APM) facility in Cambridge, England. The majority of stellar images are
rejected by the regularity of their image surface brightness profiles.
Remaining images are inspected by eye on film copies of the survey material and
classed as stellar, multiple stellar, galaxy, merger or noise. Galaxies are
further classified as elliptical, lenticular, spiral, irregular or uncertain.
The 180 survey fields are put onto a uniform photometric system by comparing
the magnitudes of galaxies in the overlap regions between neighbouring plates.
The magnitude zero-point, photometric uniformity and photographic saturation
are checked with CCD photometry. Finally, the completeness and reliability of
the catalogue is assessed using various internal tests and by comparing with
several independently constructed galaxy catalogues.Comment: 52 pages, uuencoded, gzipped tar archive, includes all figures. The
catalogue data is available from
ftp://adc.gsfc.nasa.gov/pub/adc/archives/journal_tables/MNRAS/278/1025
UBR charge-coupled device photometry of Stromlo-APM galaxies
We present CCD photometry in the Johnson-Kron-Cousins UBR bands for a sample
of 320 galaxies selected from the Stromlo-APM Redshift Survey. We use this CCD
data to estimate the galaxy luminosity function in the U, B, R and b_J bands,
finding consistent results with earlier work. Fainter galaxies serendipitously
observed on our CCD frames allow a check of the photometric calibration of the
APM Galaxy Survey. We find no evidence of any significant scale error in the
APM magnitudes.Comment: 8 pages, 7 figure
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