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|Abstract:||Galaxy-scale bars are expected to provide an effective means for driving material toward the central region in spiral galaxies, and possibly feeding supermassive black holes (BHs). Here we present a statistically complete study of the effect of bars on average BH accretion. From a well-selected sample of 50,794 spiral galaxies (with M-* similar to 0.2-30 x 10(10) M-circle dot) extracted from the Sloan Digital Sky Survey Galaxy Zoo 2 project, we separate those sources considered to contain galaxy-scale bars from those that do not. Using archival data taken by the Chandra X-ray Observatory, we identify X-ray luminous (L-X (sic) 10(41) erg s(-1)) active galactic nuclei and perform an X-ray stacking analysis on the remaining X-ray undetected sources. Through X-ray stacking, we derive a time-averaged look at accretion for galaxies at fixed stellar mass and star-formation rate, finding that the average nuclear accretion rates of galaxies with bar structures are fully consistent with those lacking bars (M-acc approximate to 3 x 10 (5) M-circle dot yr(-1)). Hence, we robustly conclude that large-scale bars have little or no effect on the average growth of BHs in nearby (z < 0.15) galaxies over gigayear timescales.|
|Electronic Publication Date:||13-Jul-2017|
|Citation:||Goulding, AD, Matthaey, E, Greene, JE, Hickox, RC, Alexander, DM, Forman, WR, Jones, C, Lehmer, BD, Griffis, S, Kanek, S, Oulmakki, M. (2017). Galaxy-scale Bars in Late-type Sloan Digital Sky Survey Galaxies Do Not Influence the Average Accretion Rates of Supermassive Black Holes. ASTROPHYSICAL JOURNAL, 843 (10.3847/1538-4357/aa755b|
|Type of Material:||Journal Article|
|Journal/Proceeding Title:||ASTROPHYSICAL JOURNAL|
|Version:||Final published version. Article is made available in OAR by the publisher's permission or policy.|
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