Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The hidden "AGN main sequence": Evidence for a universal black hole
  accretion to star formation rate ratio since z~2 producing a M_BH-M* relation   Using X-ray stacking analyses we estimate the average amounts of supermassive
black hole (SMBH) growth taking place in star-forming galaxies (SFGs) at z~1
and z~2 as a function of galaxy stellar mass (M*). We find 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., (i.e.,
dM_BH/dt ~ M*^(0.86+/-0.39) for the z~1 sample and dM_BH/dt ~ M*^(1.05+/-0.36)
for the z~2 sample). It follows that the ratio of SMBH growth rate to SFR is
(a) flat with respect to M* (b) not evolving with redshift and (c) close to the
ratio required to maintain/establish a SMBH to M* ratio of ~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~2, irrespective of host galaxy mass and AGN 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.

4
The categories of this paper are: cond-mat
37
The categories of this paper are: supr-con
14
The categories of this paper are: math-ph
13
The categories of this paper are: quant-ph
19
The categories of this paper are: eess
7
The categories of this paper are: hep-th
11
The categories of this paper are: hep-lat
18
The categories of this paper are: econ
1
The categories of this paper are: cs
35
The categories of this paper are: mtrl-th
29
The categories of this paper are: funct-an
21
The categories of this paper are: adap-org
32
The categories of this paper are: atom-ph
27
The categories of this paper are: comp-gas
16
The categories of this paper are: stat
9
The categories of this paper are: nlin