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Browsing by Author "Urry, C. Megan"
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The green valley is a red herring : Galaxy Zoo reveals two evolutionary pathways towards quenching of star formation in early-and late-type galaxies
Schawinski, Kevin; Urry, C. Megan; Simmons, Brooke D.; Fortson, Lucy; Kaviraj, Sugata; Keel, William C.; Lintott, Chris J.; Masters, Karen L.; Nichol, Robert C.; Sarzi, Marc; Skibba, Ramin; Treister, Ezequiel; Willett, Kyle W.; Wong, O. Ivy; Yi, Sukyoung K. (2014-05-01)We use SDSS+GALEX+Galaxy Zoo data to study the quenching of star formation in lowredshift galaxies. We show that the green valley between the blue cloud of star-forming galaxies and the red sequence of quiescent galaxies ... -
Optical detection of the Pictor A jet and tidal tail : evidence against an IC/CMB jet
Gentry, Eric S.; Marshall, Herman L.; Hardcastle, M.J.; Perlman, Eric S.; Birkinshaw, Mark; Worrall, Diana M.; Lenc, Emil; Siemiginowska, Aneta; Urry, C. Megan (2015-07-20)New images of the FR II radio galaxy Pictor A from the Hubble Space Telescope reveal a previously undiscovered tidal tail, as well as a number of jet knots coinciding with a known X-ray and radio jet. The tidal tail is ...