Are Hubble Deep Field Galaxy Counts Whole Numbers?
arXiv:astro-ph/9603020 · doi:10.1086/310394
Abstract
We compute the two-point angular correlation function and number-magnitude relation of Hubble Deep Field sources in order to assess their nature. We find that the correlation peaks between 0.25 arcsec and 0.4 arcsec with amplitude of 2 or greater, and much more for the smallest objects. This angular scale corresponds to physical scales of order 1 kpc for redshifts z > 1. The correlation must therefore derive from objects with subgalaxian separations. At faint magnitudes, the counts satisfy the relation Number prop. to 1/flux, expected for images which are subdivisions of larger ones. A conservative conjecture may explain these results. Since high redshift space (z > 0.5) dominates the volume of the sample, observational redshift effects are important. The K-correction and surface brightness dimming of diffuse sources enhances the prominence of compact, unresolved, UV-bright objects, such as star-forming regions within normal gas-rich galaxies. If such regions appear as individual sources, they could explain the subgalaxian correlation.
accepted by ApJL, AASTeX 4.0 preprint style, 2 PostScript figures, Replacing astro-ph/9603020 (major modification: improved detection alg.)
References in corpus (2)
Cited by in corpus (31)
- A new catalog of photometric redshifts in the Hubble Deep Field
- Large Equivalent width Lyman-alpha line emission at z=4.5: young galaxies in a young universe
- Constraints on the assembly and dynamics of galaxies. II. Properties of kiloparsec-scale clumps in rest-frame optical emission of z ~ 2 star-forming galaxies
- Faint Blue Galaxies
- An HST/WFC3-IR Morphological Survey of Galaxies at z = 1.5-3.6: I. Survey Description and Morphological Properties of Star Forming Galaxies
- The First Detections of the Extragalactic Background Light at 3000, 5500, and 8000A (I): Results
- The Hubble Deep Fields
- Hubble Space Telescope images of submillimeter sources: large, irregular galaxies at high redshift
- Clustering at High Redshift: Precise Constraints from a Deep, Wide Area Survey
- Hubble Deep Field Constraint on Baryonic Dark Matter
- Cloning Hubble Deep Fields I: A Model-Independent Measurement of Galaxy Evolution
- Cloning Hubble Deep Fields: A Model-Independent Measurement of Galaxy Evolution
- An Extendable Galaxy Number Count Model
- Unavoidable Selection Effects in the Analysis of Faint Galaxies in the Hubble Deep Field: Probing the Cosmology and Merger History of Galaxies
- The Structure and Star Formation History of Early-Type Galaxies in the UDF/GRAPES Survey
- Clustering of Galaxies in the Hubble Deep Field
- A candidate gravitational lens in the Hubble Deep Field
- The Opacity of Nearby Galaxies from Colors and Counts of Background Galaxies: I. The Synthetic Field Method and its Application to NGC 4536 and NGC 3664
- Adaptive Optics Rest-Frame V-band Imaging of Lyman Break Galaxies at z~3: High-surface Density Disk-like Galaxies ?
- Dynamics of ``Small Galaxies'' in the Hubble Deep Field
- Quasar Candidates in the Hubble Deep Field
- Active Nuclei and Star-Forming Objects at z>2: Metallicities, Winds, and Formation Histories
- The Surface Brightness Fluctuations and Globular Cluster Populations of M87 and its Companions
- The metal absorption systems of the Hubble Deep Field South QSO
- Galaxy Clustering at z ~ 2 and Halo Radii
- A Possible Effect of the Period of Galaxy Formation on the Angular Correlation Function
- Dynamics of Lyman Break Galaxies and Their Host Halos
- Diffuse Dark and Bright Objects in the Hubble Deep Field
- On the Effective Spatial Separations in the Clustering of Faint Galaxies
- High Redshift Candidates and the Nature of Small Galaxies in the Hubble Deep Field
- ISO Observations of the 53W002 Group at 6.7 microns: In Search of the Oldest Stellar Populations at z=2.4