Millimeter observations of HCM6A, a gravitationally lensed Lyman alpha emitting galaxy at z=6.56

Abstract

The gravitationally lensed Lyman-alpha emitting galaxy, HCM6A, detected by Hu et al. (2002) at z=6.56 behind the Abell 370 cluster was observed with the MAMBO-2 array of bolometers at 1.2mm wavelength. The galaxy was not detected down to 1.08 mJy (3 sigma), but the depth of the observations and the lens amplification allow us to improve by approximately one order of magnitude previously published upper limits on far infrared emission of Lyman-alpha emitting galaxies at this redshift. The following upper limits are derived from our observations assuming typical dust parameters: dust mass <5.3x10^7 Msun, IR luminosity <2.1x10^{11} Lsun, and star formation rate, SFR<35 Msun/yr. The observed restframe UV--optical--IR spectral energy distribution (SED) of this galaxy is compatible with that of normal spiral galaxies or blue compact dwarf galaxies. SEDs of prototypical ULIRGs, such as Arp 220, are clearly excluded. Finally, we obtain an upper limit of < 2.1x10^{-2} Msun/yr/Mpc^{-3} for the dust-obscured SFR density of Lyman-alpha selected galaxies at z~6.6.

References in corpus (7)

• Three Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Polarization Analysis
• The End of the Reionization Epoch Probed by Ly-alpha Emitters at z=6.5 in the Subaru Deep Field
• Dust Formation and Survival in Supernova Ejecta
• Millimeter and Radio Observations of z~6 Quasars
• Constraints on Physical Properties of z~6 Galaxies Using Cosmological Hydrodynamic Simulations
• Radio and millimeter properties of $z\sim 5.7$ Ly$\alpha$ emitters in the COSMOS field: limits on radio AGN, submm galaxies, and dust obscuration
• Millimeter observations of HCM6A, a gravitationally lensed Lyman alpha emitting galaxy at z=6.56

Cited by in corpus (7)

• Cluster Lenses
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• ALMA Observation of 158 micron [CII] Line and Dust Continuum of a z=7 Normally Star-forming Galaxy in the Epoch of Reionization
• New constraints on dust emission and UV attenuation of z=6.5-7.5 galaxies from millimeter observations
• ALMA Observations of the Host Galaxy of GRB090423 at z=8.23: Deep Limits on Obscured Star Formation 630 Million Years After the Big Bang
• Millimeter observations of HCM6A, a gravitationally lensed Lyman alpha emitting galaxy at z=6.56
• Resolving dust and Lyα emission in a lensed galaxy at the epoch of reionization with JWST/CANUCS