DRAFT VERSION JUNE 18, 2018 Preprint typeset using LATEX style emulateapj v. 5/2/11 CLUMPY GALAXIES IN CANDELS. I. THE DEFINITION OF UV CLUMPS AND THE FRACTION OF CLUMPY GALAXIES AT 0.5 <Z< 3 1 2 3 1 4 5 YICHENG GUO ,HENRY C. FERGUSON ,ERIC F. BELL ,DAVID C. KOO ,CHRISTOPHER J. CONSELICE , MAURO GIAVALISCO , 2 6 2 7 8 9 2 SUSAN KASSIN ,YU LU ,RAY LUCAS ,NIR MANDELKER ,DANIEL M. MCINTOSH , JOEL R. PRIMACK ,SWARA RAVINDRANATH , 1 10 7 1 1 2 GUILLERMO BARRO ,DANIEL CEVERINO ,AVISHAI DEKEL ,SANDRA M. FABER , JEROME J. FANG ,ANTON M. KOEKEMOER , 2 11 12 12 KAI NOESKE , MARC RAFELSKI , , AMBER STRAUGHN 1 UCO/Lick Observatory, Department of Astronomy and Astrophysics, University of California, Santa Cruz, CA, USA;
[email protected] 2 Space Telescope Science Institute, Baltimore, MD, USA 3 Department of Astronomy, University of Michigan, Ann Arbor, MI, USA 4 School of Physics and Astronomy, University of Nottingham, University Park, Nottingham NG7 2RD, UK 5 Department of Astronomy, University of Massachusetts, Amherst, MA, USA 6 Kavli Institute for Particle Astrophysics and Cosmology, Stanford, CA, USA 7 Center for Astrophysics and Planetary Science, Racah Institute of Physics, The Hebrew University, Jerusalem 91904 Israel 8 Department of Physics and Astronomy, University of Missouri-Kansas City, Kansas City, MO, USA 9 Department of Physics, University of California, Santa Cruz, CA, USA 10 Departamento de F´ısica Te´orica, Universidad Aut´onoma de Madrid, 28049 Madrid, Spain 11 NASA Postdoctoral Program Fellow and 12 Astrophysics Science Division, Goddard Space Flight Center, Code 665, Greenbelt, MD 20771, USA Draft version June 18, 2018 ABSTRACT Although giant clumps of stars are thought to be crucial to galaxy formation and evolution, the most basic demographics of clumps are still uncertain, mainly because the definition of clumps has not been thoroughly discussed.