GOODS 850-5 -- A z>4 Galaxy Discovered in the Submillimeter?

TL;DR

This paper reports the identification of a bright submillimeter source, GOODS 850-5, which is likely a galaxy at redshift greater than 4, based on multi-wavelength observations despite its faintness at other wavelengths.

Contribution

The study provides the first interferometric identification of GOODS 850-5 and presents evidence supporting its high redshift nature, contributing to understanding of early universe galaxies.

Findings

GOODS 850-5 is extremely faint at optical wavelengths.

Detected in mid-IR and submillimeter, but weak in radio.

Likely a z>4 galaxy based on multi-wavelength data.

Abstract

We report an SMA interferometric identification of a bright submillimeter source, GOODS 850-5. This source is one of the brightest 850 um sources in the GOODS-N but is extremely faint at all other wavelengths. It is not detected in the GOODS HST ACS images and only shows a weak 2 sigma signal at 1.4 GHz. It is detected in the Spitzer IRAC bands and the MIPS 24 um band, however, with very low fluxes. We present evidence in the radio, submillimeter, mid-IR, near-IR, and optical that suggest GOODS 850-5 may be a z>4 galaxy.