Structure and photometry of an I less than 20.5 galaxy sample from the Hubble Space Telescope medium deep survey

Details Structure and photometry of an I less than 20.5 galaxy sample from the Hubble Space Telescope medium deep survey Structure and photometry of an I less than 20.5 galaxy sample from the Hubble Space Telescope medium deep survey

May 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995apj...444...21p&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 444, no. 1, p. 21-40

Astronomy and Astrophysics

Astronomy

10

Astronomical Photometry, Galactic Structure, Galaxies, Image Analysis, Sky Surveys (Astronomy), Cosmology, Error Analysis, Galactic Evolution, Hubble Space Telescope, Image Reconstruction, Radii, Red Shift, Stellar Luminosity

Scientific paper

A set of 100 faint galaxies from nine Hubble Space Telescope (HST) Wide Field Camera (WFC) I-band images have been analyzed as part of the Medium Deep Survey (MDS) Key Project. This sample reaches a depth of I approximately less than or equal to 20.5 (corresponding to B approximately 22-23) and complements the first set of fainter galaxies analyzed by the MDS team. Images were deconvolved using the Lucy-Richardson algorithm and a newly developed procedure designed to yield a more reliable determination of structure in the low-S/N regime. These deconvolved images were used to characterize the structure of the galaxies through quantative measurements of total magnitudes, half-light radii, exponential disk scale lengths, and disk-to-total rations. Extensive testing was done to establish the validity of the procedures used and to characterize the degree of systematic errors present in the analysis techniques. The observed size-magnitude distribution appears consistent with a scenario in which luminous galaxies have evolved little in intrinsic luminosity, size, or structure over recent epochs in a 'normal' cosmology (0 less than q0 less than 0.5 and Lambda0 = 0). The predicted nonevolving distributions were based on models designed to fit existing counts, colors, and redshifts of faint galaxies and on the observed correlations between metric rest-frame size and luminosity found in a nearby galaxy sample studied by Kent (1984-1985). The typical galaxy in our sample is expected to be at z approximately equal to 0.3, and to have a luminosity approximately 0.5 mag fainter than L* and a half-light radius of approximately 1 sec or approximately 6 kpc (H 0 = 50 km/s Mpc). The observed distribution of disk-to-total ratios, while uncertain, is in agreement with that of Kent's sample and thus supports the view that substantial evolution has not occurred over the look-back times characteristic of our sample.

Affiliated with

Also associated with

No associations

Rating

Structure and photometry of an I less than 20.5 galaxy sample from the Hubble Space Telescope medium deep 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 Structure and photometry of an I less than 20.5 galaxy sample from the Hubble Space Telescope medium deep survey, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Structure and photometry of an I less than 20.5 galaxy sample from the Hubble Space Telescope medium deep survey will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1058289