Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Exploring accretion disc physics and black hole growth with regular
  monitoring of ultrafast AGN winds   15 years of XMM-Newton observations have established that ultra-fast, highly
ionized winds are common in radio-quiet AGN. A simple theory of
Eddington-limited accretion correctly predicts the typical velocity (~0.1c) and
high ionization of such winds, with observed flow energy capable of ejecting
star-forming gas. With a recent extended XMM-Newton observation of the
archetypal UFO, PG1211+143, revealing a more complex flow pattern, we suggest
that targetted observations over the next decade offer unique potential for
probing the inner accretion disc structure and SMBH growth.

17
The categories of this paper are: q-fin
15
The categories of this paper are: nucl-ex
23
The categories of this paper are: solv-int
19
The categories of this paper are: eess
27
The categories of this paper are: comp-gas
31
The categories of this paper are: ao-sci
24
The categories of this paper are: dg-ga
12
The categories of this paper are: nucl-th
11
The categories of this paper are: hep-lat
13
The categories of this paper are: quant-ph
36
The categories of this paper are: cmp-lg
30
The categories of this paper are: q-alg
35
The categories of this paper are: mtrl-th
34
The categories of this paper are: chem-ph
14
The categories of this paper are: math-ph
20
The categories of this paper are: acc-phys