The Host Haloes of Lyman Break Galaxies and Sub-millimeter Sources

Abstract

We use the observed sizes and star formation rates of Lyman-break galaxies (LBGs) to understand their properties expected in the hierarchical scenario of galaxy formation. The observed size distribution constrains the masses of the host haloes of LBGs from below, while the observed star-formation distribution constrains the masses from above. Assuming a flat CDM model with a cosmological constant (${\Omega }_{\Lambda }=0.7$), we find that consistency with observations requires the circular velocities of LBG host haloes to be in the range 100--$300\mathrm{km}{\mathrm{s}}^{-1}$. The predicted comoving correlation length of these objects is $\sim 3h^{-1}\mathrm{Mpc}$, and the predicted velocity dispersion of their stellar contents is typically $70\mathrm{km}{\mathrm{s}}^{-1}$. The same prescription applied to larger haloes in the CDM cosmogony predicts the existence of galaxies with star formation rates $\sim 1000{\mathrm{M}}_{\odot }\mathrm{y}{\mathrm{r}}^{-1}$ at redshift $z\sim 3$. We explore the possibility of identifying these galaxies to be the bright sub-millimeter (sub-mm) sources detected by SCUBA. The model predicts that the host haloes of these sub-mm sources are massive. These galaxies are predicted to be strongly correlated, with a comoving correlation length of $\sim 7h^{-1}\mathrm{Mpc}$. The descendants of the bright sub-mm sources should reside in clusters of galaxies at the present time, and it is likely that these objects are the progenitors of giant ellipticals. The model predicts the existence of a relatively bright and red population of galaxies at $z\sim 3$, which may be observed in the K-band.

27 pages, 14 figures, submitted to MNRAS

References in corpus (3)

• The Rest Frame Optical Spectra of Lyman Break Galaxies: Star Formation, Extinction, Abundances, and Kinematics
• Clustering Segregation With UV Luminosity in Lyman-Break Galaxies at z~3 and Its Implications
• The star-formation history of the universe - an infrared perspective

Cited by in corpus (19)

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• Subaru Deep Survey V. A Census of Lyman Break Galaxies at z=4 and 5 in the Subaru Deep Fields: Photometric Properties
• The nature of faint submm-selected galaxies
• The abundance and clustering of dark haloes in the standard Lambda CDM cosmogony
• Clustering of Submillimeter-Selected Galaxies
• Subaru Deep Survey VI. A Census of Lyman Break Galaxies at z=4 and 5 in the Subaru Deep Fields: Clustering Properties
• Galaxy Halo Occupation at High Redshift
• Lyman-break galaxies at z~5 -I. First significant stellar mass assembly in galaxies that are not simply z~3 LBGs at higher redshift
• Properties of host haloes of Lyman-break galaxies and Lyman-alpha Emitters from their number densities and angular clustering
• Modelling SCUBA sources in a Lambda-CDM cosmology: hot starbursts or cold extended galactic dust?
• Galaxy Formation in Preheated Intergalactic Media
• Infrared Luminous Lyman Break Galaxies: A Population that Bridges LBGs and SCUBA Galaxies
• On the Spatial Correlations of Lyman Break Galaxies
• Masses of high-z galaxy hosting haloes from angular clustering and their evolution in the CDM model
• Galaxy Collisions - Dawn of a New Era
• An analytic model for the galactic winds and mass outflows
• Pairwise velocity dispersion of galaxies at high redshift: theoretical predictions
• Dynamics of Lyman Break Galaxies and Their Host Halos
• SED-inferred properties and morphology of Lyman-break galaxies at $z\sim 1$ in the CDF-S