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Stacked Star Formation Rate Profiles of Bursty Galaxies Exhibit “Coherent” Star Formation

  • Authors: Matthew E. Orr, Christopher C. Hayward, Erica J. Nelson, Philip F. Hopkins, Claude-André Faucher-Giguère, Dušan Kereš, T. K. Chan, Denise M. Schmitz, and Tim B. Miller

2017 The Astrophysical Journal Letters 849 L2.

  • Provider: AAS Journals

Caption: Figure 3.

Stacked SFR (top row), sSFR (middle row), and neutral gas (bottom row) surface density profiles (binned into 1 kpc annuli) for two stellar mass bins, ﹩8.4\lt \mathrm{log}({M}_{\star }/{M}_{\odot })\lt 9.4﹩ (left column) and ﹩9.6\lt \mathrm{log}({M}_{\star }/{M}_{\odot })\lt 10.2﹩ (right column), for ﹩0.7\lt z\lt 1.5﹩. Prior to stacking, in each mass bin, the galaxies have been separated according to their position relative to the MS: above (blue dashed), on (black solid), or below (red dashed–dotted). The SFR, sSFR, and ﹩{{\rm{\Sigma }}}_{\mathrm{gas}}﹩ profiles generally decrease monotonically with radius. Moreover, the stacked profiles of galaxies above (below) the MS are above (below) those of MS galaxies at nearly all radii.

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