Expected Sub-mm Emission and Dust Properties of Lyman Break Galaxies at High Redshift

Abstract

We investigate expected sub-mm emission and dust properties of the Lyman Break Galaxies (LBGs) in the Hubble Deep Field (HDF). The SCUBA Deep Survey (Hughes et al., 1998) provides an upper limit of the 850 micron flux densities of the LBGs. With this constraint, we argue that a typical ultra-violet to far-infrared spectral shape of the high-redshift LBGs is rather close to a template spectrum of low-reddening starburst galaxies in the local universe but different from that of heavily dust-enshrouded ultra-luminous far-infrared galaxies like Arp220. We also evaluate the lower-limit temperature of dust in LBGs assuming single- and two-component modified black-body spectrum. To estimate the total amount of energy re-emitted in FIR wavelength, we take two different approaches; model fitting of the UV spectra of LBGs and an empirical method using the relationship between UV spectral shape and UV/FIR flux ratio observed for local starburst galaxies. Both methods give lower-limit temperature of the LBGs as around 40 K, which is higher than the typical dust temperature of local optical- and infrared-selected galaxies. This result is also supported by the comparison of the expected sub-mm flux of the LBGs with the cosmic FIR background radiation. The high dust temperature may indicate the effective massive-star formation or different dust properties in the high-redshift LBGs.

11 pages, 4 figures; The Astrophysical Journal (Letters), in press

References in corpus (12)

• Unveiling Dust-enshrouded Star Formation in the Early Universe: a Sub-mm Survey of the Hubble Deep Field
• A Deep Sub-millimeter Survey of Lensing Clusters: A New Window on Galaxy Formation and Evolution
• SCUBA: A common-user submillimetre camera operating on the James Clerk Maxwell Telescope
• Dusty star forming galaxies at high redshift
• Keck Spectroscopy of Redshift z~3 Galaxies in the Hubble Deep Field
• Infared Observations of Nebular Emission Lines from Galaxies at z = 3
• The Canada-UK Deep Sub-Millimeter Survey II: First identifications, redshifts and implications for galaxy evolution
• The Panchromatic Starburst Intensity Limit At Low And High Redshift
• Optical-IR Spectral Energy Distributions of z>2 Lyman Break Galaxies
• The Spectral Energy Distribution of Normal, Starburst and Active Galaxies
• Comparison of the COBE FIRAS and DIRBE Calibrations
• Radio Identification of Sub-mm Sources in the Hubble Deep Field

Cited by in corpus (28)

• The Dust Opacity of Star-Forming Galaxies
• The Stellar Populations and Evolution of Lyman Break Galaxies
• Subaru Deep Survey V. A Census of Lyman Break Galaxies at z=4 and 5 in the Subaru Deep Fields: Photometric Properties
• ALMA Spectroscopic Survey in the Hubble Ultra Deep Field: The Infrared Excess of UV-selected z=2-10 galaxies as a function of UV-continuum Slope and Stellar Mass
• An Intensely Star-Forming Galaxy at z~7 with Low Dust and Metal Content Revealed by Deep ALMA and HST Observations
• Subaru Deep Survey VI. A Census of Lyman Break Galaxies at z=4 and 5 in the Subaru Deep Fields: Clustering Properties
• Discovery of a Giant Lya Emitter Near the Reionization Epoch
• Keck Deep Fields. II. The UV Galaxy Luminosity Function at z~4, 3, and 2
• SEDfit: Software for Spectral Energy Distribution Fitting of Photometric Data
• Serendipitously Detected Galaxies in the Hubble Deep Field
• Molecular Gas in the Lensed Lyman Break Galaxy cB58
• Faint Submillimeter Galaxies Revealed by Multifield Deep ALMA Observations: Number Counts, Spatial Clustering, and A Dark Submillimeter Line Emitter
• Extinction of gamma-ray burst afterglows as a diagnostic of the location of cosmic star formation
• Spectral Energy Distributions of Dusty Galaxies
• The infrared-dark dust content of high redshift galaxies
• Dust emission from the lensed Lyman break galaxy cB58
• A model for the infrared dust emission from forming galaxies
• Radiative properties of the first galaxies: rapid transition between blue and red
• The Ultraviolet-Far Infrared Energy Budget of the Gravitationally Lensed Lyman Break Galaxy MS1512-cB58
• Dust masses of $z>5$ galaxies from SED fitting and ALMA upper limits
• Dust emission model of Lyman-break galaxies
• IR characteristic emission and dust properties of star-forming galaxies at 4.5 $<$ z $<$ 6.2
• Far-Infrared Properties of Lyman Break Galaxies from Cosmological Simulations
• Variation of dust properties with cosmic time implied by radiative torque disruption
• The temperatures of dust-enshrouded AGNs
• Submillimeter Observations of Low Metallicity Galaxy NGC 4214
• ALMA Observations for CO Emission from Luminous Lyman-break Galaxies at $z=6.0293$-$6.2037$
• "Zombie" or active? An alternative explanation to the properties of star-forming galaxies at high redshift