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Reionization after Planck: The Derived Growth of the Cosmic Ionizing Emissivity now matches the Growth of the Galaxy UV Luminosity Density
R. J. Bouwens, G. D. Illingworth, P. A. Oesch +4
Thomson optical depth tau measurements from Planck provide new insights into the reionization of the universe. In pursuit of model-independent constraints on the properties of the…
Spectroscopy of z ~ 7 candidate galaxies: Using Lyman-alpha to constrain the neutral fraction of hydrogen in the high-redshift universe
Joseph Caruana, Andrew J. Bunker, Stephen M. Wilkins +4
Following our previous spectroscopic observations of galaxies with Gemini/GNIRS and VLT/XSHOOTER, which targeted a total of 8 objects, we present here our results from a deep…
Theoretical predictions for the effect of nebular emission on the broad band photometry of high-redshift galaxies
Stephen M. Wilkins, William Coulton, Joseph Caruana +6
By combining optical and near-IR observations from the Hubble Space Telescope with NIR photometry from the Spitzer Space Telescope it is possible to measure the rest-frame UV-optic…
VLT/XSHOOTER & Subaru/MOIRCS Spectroscopy of HUDF-YD3: No Evidence for Lyman-alpha Emission at z=8.55
Andrew J. Bunker, Joseph Caruana, Stephen M. Wilkins +5
We present spectroscopic observations with VLT/XSHOOTER and Subaru/MOIRCS of a relatively bright Y-band drop-out galaxy in the Hubble Ultra Deep Field, first selected by Bunker et…
Constraining the Bright-end of the UV Luminosity Function for z ~ 7 - 9 Galaxies: results from CANDELS/GOODS-South
Silvio Lorenzoni, Andrew J. Bunker, Stephen M. Wilkins +3
The recent Hubble Space Telescope near-infrared imaging with the Wide-Field Camera #3 (WFC3) of the GOODS-South field in the CANDELS program covering nearly 100arcmin^2, along with…
No Evidence for Lyman-alpha Emission in Spectroscopy of z > 7 Candidate Galaxies
Joseph Caruana, Andrew J. Bunker, Stephen M. Wilkins +5
We present Gemini/GNIRS spectroscopic observations of 4 z-band (z~7) dropout galaxies and VLT/XSHOOTER observations of one z-band dropout and 3 Y-band (z~8-9) dropout galaxies in t…
The UV Properties of Star Forming Galaxies I: HST WFC3 Observations of Very-high Redshift Galaxies
Stephen M. Wilkins, Andrew J. Bunker, Elizabeth Stanway +2
The acquisition of deep Near-IR imaging with Wide Field Camera 3 on the Hubble Space Telescope has provided the opportunity to study the very-high redshift Universe. For galaxies u…
Candidate z~8-9 Galaxies from WFC3 Imaging
Silvio Lorenzoni, Andrew Bunker, Stephen Wilkins +3
We present a search for galaxies at 7.6<z<9.8 using the latest HST WFC3 near-infrared data, based on the Lyman-break technique. We search for galaxies which have large (Y-J) colour…
New Star Forming Galaxies at z\approx 7 from WFC3 Imaging
Stephen M. Wilkins, Andrew J. Bunker, Silvio Lorenzoni +1
The addition of Wide Field Camera 3 (WFC3) on the Hubble Space Telescope (HST) has led to a dramatic increase in our ability to study the z>6 Universe. The increase in the near-inf…