THE HIDDEN "AGN MAIN SEQUENCE": EVIDENCE FOR A UNIVERSAL BLACK HOLE ACCRETION TO STAR FORMATION RATE RATIO SINCE z ∼ 2 PRODUCING AN MBH-M* RELATION

被引：205

作者：

Mullaney, J. R. ^{[1
,2
]}

Daddi, E. ^{[1
]}

Bethermin, M. ^{[1
]}

Elbaz, D. ^{[1
]}

Juneau, S. ^{[1
]}

Pannella, M. ^{[1
]}

Sargent, M. T. ^{[1
]}

Alexander, D. M. ^{[2
]}

Hickox, R. C. ^{[3
]}

机构：

[1] CEA Saclay, Irfu Serv Astrophys, F-91191 Gif Sur Yvette, France

[2] Univ Durham, Dept Phys, Durham DH1 3LE, England

[3] Dartmouth Coll, Dept Phys & Astron, Hanover, NH 03755 USA

来源：

ASTROPHYSICAL JOURNAL LETTERS | 2012年 / 753卷 / 02期

关键词：

galaxies: active; galaxies: evolution; galaxies: star formation; X-rays: general; ACTIVE GALACTIC NUCLEI; DEEP FIELD; MASSIVE GALAXIES; HOST GALAXIES; STELLAR MASS; GAS FRACTIONS; DISK GALAXIES; BULGE MASS; EVOLUTION; LUMINOSITY;

D O I：

10.1088/2041-8205/753/2/L30

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Using X-ray stacking analyses we estimate the average amounts of supermassive black hole (SMBH) growth taking place in star-forming galaxies at z similar to 1 and z similar to 2 as a function of galaxy stellar mass (M-*). We find that the average SMBH growth rate follows remarkably similar trends with M-* and redshift as the average star formation rates (SFRs) of their host galaxies (i.e., (M) over dot(BH) proportional to M-*(0.86+/-0.39) for the z similar to 1 sample and (M) over dot(BH) proportional to M-*(1.05+/-0.36) for the z similar to 2 sample). It follows that the ratio of SMBH growth rate to SFR is (1) flat with respect to M-*, (2) not evolving with redshift, and (3) close to the ratio required to maintain/establish an SMBH to stellar mass ratio of approximate to 10(-3) as also inferred from today's M-BH-M-Bulge relationship. We interpret this as evidence that SMBHs have, on average, grown in step with their host galaxies since at least z similar to 2, irrespective of host galaxy mass and active galactic nucleus triggering mechanism. As such, we suggest that the same secular processes that drive the bulk of star formation are also responsible for the majority of SMBH growth. From this, we speculate that it is the availability of gas reservoirs that regulate both cosmological SMBH growth and star formation.

引用

页数：5

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