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Browsing by Author "Ellis, R.S."
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CO interferometry of gas-rich spiral galaxies in the outskirts of an intermediate redshift cluster
Geach, J.E.; Smail, I.; Coppin, Kristen; Moran, S.M.; Edge, A.C.; Ellis, R.S. (2009-05-01)We present IRAM Plateau de Bure Interferometer 3-mm observations of CO j(1→ 0) emission in two 24-μm selected starburst galaxies in the outskirts (~2-3,R) of the rich cluster C1 0024+16 (z = 0.395). The galaxies' inferred ... -
A coincidence of disturbed morphology and blue UV colour : Minor-merger-driven star formation in early-type galaxies at z~ 0.6
Kaviraj, S.; Tan, K.-M.; Ellis, R.S.; Silk, J. (2011-03-01)We exploit multiwavelength photometry of early-type galaxies (ETGs) in the Cosmological Evolution Survey (COSMOS) to demonstrate that the low-level star formation activity in the ETG population at intermediate redshift is ... -
The contribution of high-redshift galaxies to cosmic reionization : new results from deep WFC3 imaging of the Hubble Ultra Deep Field
Bunker, A.; Wilkins, S.; Ellis, R.S.; Stark, D.; Lorenzoni, S.; Chiu, K.; Lacy, M.; Jarvis, M.J.; Hickey, S. (2010)We have searched for star-forming galaxies at z≈ 7–10 by applying the Lyman-break technique to newly released Y-, J- and H-band images (1.1, 1.25 and 1.6 μm) from Wide Field Camera 3 (WFC3) on the Hubble Space Telescope. ... -
Minor-merger-driven growth of early-type galaxies over the last 8 billion years
Kaviraj, S.; Crockett, R.M.; Silk, J.; Ellis, R.S.; Yi, S.K.; O'Connell, R.W.; Windhorst, R.; Whitmore, B.C. (Cambridge University Press, 2011-09)We summarise recent progress in understanding the star formation activity in early-type galaxies (ETGs), using recent studies that leverage photometry in the rest-frame ultraviolet (UV) wavelengths. While classically thought ... -
Newborn spheroids at high redshift : When and how did the dominant, old stars in today's massive galaxies form?
Kaviraj, S.; Silk, J.; Ellis, R.S.; Cohen, S.; Windhorst, R.A.; Peirani, S.; O'Connell, R.W.; Whitmore, B.C.; Ryan Jr., R.E.; Hathi, N.P.; Dopita, M.A.; Frogel, J.A.; Dekel, A. (2013-01-11)We study ~330 massive (M > 10M), newborn spheroidal galaxies (SGs) around the epoch of peak star formation (1 <z <3) to explore the high-redshift origin of SGs and gain insight into when and how the old stellar populations ... -
Probing ∼L* Lyman-break galaxies at z≈ 7 in GOODS-South with WFC3 on Hubble Space Telescope
Wilkins, S.; Bunker, A.; Ellis, R.S.; Stark, D.; Stanway, E.R.; Chiu, K.; Lorenzoni, S.; Jarvis, M.J. (2010)We analyse recently acquired near-infrared Hubble Space Telescope imaging of the Great Observatories Origins Deep Survey (GOODS)-South field to search for star-forming galaxies at z≈ 7.0 . By comparing Wide Field Camera 3 ...