Observations of distant galaxies are important both for understanding how galaxies form and for probing the physical conditions of the Universe at early times. It is, however, very difficult to identify galaxies at redshifts z > 5, because they are so faint and have few spectral characteristics. We previously reported1 the probable identification of a galaxy at z = 6.68, based on one line and an apparent break in the spectrum just shortwards of that, which we interpreted as Lyman α emission and the Lyman α break, where photons with shorter wavelengths are absorbed by the intervening neutral hydrogen gas. Here we present optical photometry that shows moderate detections of light in the B- and V-band images, which are inconsistent with the expected absence of flux shortwards of the Lyman α break for a galaxy at z > 5, and inconsistent with the previous flux measurement. Moreover, the spectral energy distribution for this object cannot readily be fitted by any known galaxy spectral template at any redshift, so the redshift is undetermined.
Access optionsAccess options
Subscribe to Journal
Get full journal access for 1 year
only $3.90 per issue
All prices are NET prices.
VAT will be added later in the checkout.
Rent or Buy article
Get time limited or full article access on ReadCube.
All prices are NET prices.
Chen, H.-W., Lanzetta, K. M. & Pascarelle, S. A spectroscopically identified galaxy of probable redshift z = 6.68. Nature 398, 586–588 (1999).
Yahata, N. et al. Photometry and photometric redshifts of faint galaxies in the Hubble deep field south NICMOS field. Astrophys. J. 538, 493–504 (2000).
Puetter, R. C. & Yahil, A. in The Astronomical Data Analysis Software and Systems (ADASS) VIII Conference (eds Mehringer, D. M., Plante, R. L. & Roberts, D. A.) Vol. 172, 307–316 (Astronomical Society Publications, ASP, San Francisco, 1999).
Fernández-Soto, A., Lanzetta, K. M. & Yahil, A. A new catalog of photometric redshifts in the Hubble deep field. Astrophys. J. 513, 34–50 (1999).
Holtzman, J. A. et al. The photometric performance and calibration of WFPC2. Publ. Astron. Soc. Pacif. 107, 1065–1093 (1995).
Schmidt, B. P. et al. The high-z supernova search: measuring cosmic deceleration and global curvature of the universe using type Ia supernovae. Astrophys. J. 507, 46–63 (1998).
About this article
Quantitative study of the capillaries within the white matter of the Tg2576 mouse model of Alzheimer's disease
Brain and Behavior (2019)
Small GTPases (2019)
Animal Cells and Systems (2018)
Journal of Neuroscience Research (2017)
The role of neuroinflammation and amyloid in cognitive impairment in an APP/PS1 transgenic mouse model of Alzheimer's disease
CNS Neuroscience & Therapeutics (2017)