A CORRELATION BETWEEN STAR FORMATION RATE AND AVERAGE BLACK HOLE ACCRETION IN STAR-FORMING GALAXIES

作者：Chen Chien Ting J^*; Hickox Ryan C; Alberts Stacey; Brodwin Mark; Jones Christine; Murray Stephen S; Alexander DavidM; Assef Roberto J; Brown Michael J I; Dey Arjun; Forman William R; Gorjian Varoujan; Goulding Andrew D; Le Floc' h Emeric; Jannuzi Buell T; Mullaney James R; Pope Alexandra

来源：Astrophysical Journal, 2013, 773(1): 3.

DOI：10.1088/0004-637X/773/1/3

• galaxies: active
• galaxies: evolution
• galaxies: starburst
• infrared: galaxies
• X-rays: galaxies

We present a measurement of the average supermassive black hole accretion rate (BHAR) as a function of the star formation rate (SFR) for galaxies in the redshift range 0.25 %26lt; z %26lt; 0.8. We study a sample of 1767 far-IR-selected star-forming galaxies in the 9 deg(2) Bootes multi-wavelength survey field. The SFR is estimated using 250 mu m observations from the Herschel Space Observatory, for which the contribution from the active galactic nucleus (AGN) is minimal. In this sample, 121 AGNs are directly identified using X-ray or mid-IR selection criteria. We combined these detected AGNs and an X-ray stacking analysis for undetected sources to study the average BHAR for all of the star-forming galaxies in our sample. We find an almost linear relation between the average BHAR (in M-circle dot yr(-1)) and the SFR (in M-circle dot yr(-1)) for galaxies across a wide SFR range 0.85 %26lt; log SFR %26lt; 2.56 : logBHAR = (-3.72 +/- 0.52) + (1.05 +/- 0.33) log SFR. This global correlation between SFR and average BHAR is consistent with a simple picture in which SFR and AGN activity are tightly linked over galaxy evolution timescales.

• 出版日期2013-8-10
• 单位中国地震局