Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: X-ray outflows of active galactic nuclei warm absorbers: A 900 ks
  Chandra simulated spectrum   We report on the performance of the statistical, X-ray absorption lines
identification procedure XLINE-ID. As illustration, it is used to estimate the
time averaged gas density $n_H(r)$ of a representative AGN's warm absorber
($T\approx 10^5$~K) X-ray simulated spectrum. The method relies on three key
ingredients: (1) a well established emission continuum level; (2) a robust grid
of photoionisation models spanning several orders of magnitude in gas density
($n_H$), plasma column density ($N_H$), and in ionization states; (3)
theoretical curves of growth for a large set of atomic lines. By comparing
theoretical and observed equivalent widths of a large set of lines, spanning
highly ionized charge states from O, Ne, Mg, Si, S, Ar, and the Fe L-shell and
K-shell, we are able to infer the location of the X-ray warm absorber.

8
The categories of this paper are: hep-ex
36
The categories of this paper are: cmp-lg
5
The categories of this paper are: gr-qc
0
The categories of this paper are: hep-ph
15
The categories of this paper are: nucl-ex
37
The categories of this paper are: supr-con
7
The categories of this paper are: hep-th
14
The categories of this paper are: math-ph
21
The categories of this paper are: adap-org
32
The categories of this paper are: atom-ph
23
The categories of this paper are: solv-int
18
The categories of this paper are: econ
22
The categories of this paper are: chao-dyn
31
The categories of this paper are: ao-sci
28
The categories of this paper are: alg-geom
3
The categories of this paper are: physics