Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Accretion disk winds in active galactic nuclei: X-ray observations,
  models, and feedback   Powerful winds driven by active galactic nuclei (AGN) are often invoked to
play a fundamental role in the evolution of both supermassive black holes
(SMBHs) and their host galaxies, quenching star formation and explaining the
tight SMBH-galaxy relations. A strong support of this "quasar mode" feedback
came from the recent X-ray observation of a mildly relativistic accretion disk
wind in a ultraluminous infrared galaxy (ULIRG) and its connection with a
large-scale molecular outflow, providing a direct link between the SMBH and the
gas out of which stars form. Spectroscopic observations, especially in the
X-ray band, show that such accretion disk winds may be common in local AGN and
quasars. However, their origin and characteristics are still not fully
understood. Detailed theoretical models and simulations focused on radiation,
magnetohydrodynamic (MHD) or a combination of these two processes to
investigate the possible acceleration mechanisms and the dynamics of these
winds. Some of these models have been directly compared to X-ray spectra,
providing important insights into the wind physics. However, fundamental
improvements on these studies will come only from the unprecedented energy
resolution and sensitivity of the upcoming X-ray observatories, namely ASTRO-H
(launch date early 2016) and Athena (2028).

34
The categories of this paper are: chem-ph
8
The categories of this paper are: hep-ex
10
The categories of this paper are: q-bio
37
The categories of this paper are: supr-con
20
The categories of this paper are: acc-phys
36
The categories of this paper are: cmp-lg
13
The categories of this paper are: quant-ph
23
The categories of this paper are: solv-int
16
The categories of this paper are: stat
32
The categories of this paper are: atom-ph
17
The categories of this paper are: q-fin
21
The categories of this paper are: adap-org
33
The categories of this paper are: plasm-ph
4
The categories of this paper are: cond-mat
7
The categories of this paper are: hep-th
31
The categories of this paper are: ao-sci