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The Theta-z relation for HST bulges and disks out to Z approximately equal 0.8

1994; IOP Publishing; Volume: 434; Linguagem: Inglês

10.1086/187573

1538-4357

S. B. Mutz, Rogier A. Windhorst, P. C. Schmidtke, S. M. Pascarelle, R. E. Griffiths, K. U. Ratnatunga, Stefano Casertano, Myungshin Im, Richard S. Ellis, Karl Glazebrook, Richard F. Green, Vicki L. Sarajedini,

Gamma-ray bursts and supernovae

view Abstract Citations (45) References (9) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS The Theta -z Relation for HST Bulges and Disks out to Z 0.8 Mutz, Steven B. ; Windhorst, Rogier A. ; Schmidtke, Paul C. ; Pascarelle, Sebastian M. ; Griffiths, Richard E. ; Ratnatunga, Kavan U. ; Casertano, Stefano ; Im, Myungshin ; Ellis, Richard S. ; Glazebrook, Karl ; Green, Richard F. ; Sarajedini, Vicki L. Abstract We present HST scale lengths and ground-based redshifts for 63 faint field galaxies down to I <~ 21.5 mag from the Medium-Deep Survey. These have measured redshifts z <~ 0.8 and half-light radii 0.1" < r_e_, r_s_ < 5". We present the {THETA}-z relation for r^1/4^-bulges and exponential disks separately for world models with q_0_ = 0.0-1.0. We show that selection against low surface brightness galaxies in the HST images and ground-based spectra is comparable to that in local surveys. We compare our HST disk-dominated galaxies to a magnitude-limited subsample of the ESO-Uppsala local spirals. Extrapolating the best-fit local exponential disk scale length (r_s_ = 3.5 kpc for H_0_ = 75) out to z = 0.8, we find a rather symmetrical distribution of HST disks around this value. This implies that galaxy disks have been stable since z~0.8. We compare our HST bulge-dominated galaxies with r^1/4^ profiles to a magnitude-limited subsample of local Seven Samurai ellipticals. The latter have a local best fit r_e_ = 5.7 kpc. Our HST bulge sample shows a similar distribution for z <~ 0.8. Elliptical galaxy scale lengths have thus also remained rather constant since z <~ 0.8. We set limits to their possible evolution. Publication: The Astrophysical Journal Pub Date: October 1994 DOI: 10.1086/187573 Bibcode: 1994ApJ...434L..55M Keywords: Astronomical Models; Disk Galaxies; Galactic Bulge; Galactic Evolution; Red Shift; Hubble Space Telescope; Luminous Intensity; Maximum Likelihood Estimates; Point Spread Functions; Sky Surveys (Astronomy); Astrophysics; COSMOLOGY: OBSERVATIONS; GALAXIES: DISTANCES AND REDSHIFTS; GALAXIES: EVOLUTION full text sources ADS | data products MAST (1) ESA (1)