Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Transient outburst mechanisms in Supergiant Fast X-ray Transients   The recent discovery of a new class of recurrent and fast X-ray transient
sources, the Supergiant Fast X-ray Transients, poses interesting questions on
the possible mechanisms responsible for their transient X-ray emission. The
association with blue supergiants, the spectral properties similar to those of
accreting pulsars and the detection, in a few cases, of X-ray pulsations,
confirm that these transients are High Mass X-ray Binaries. I review the
different mechanisms proposed to explain their transient outbursts and the link
to persistent wind accretors. I discuss the different models in light of the
new observational results coming from an on-going monitoring campaign of four
Supergiant Fast X-ray Transients with Swift.

37
The categories of this paper are: supr-con
21
The categories of this paper are: adap-org
10
The categories of this paper are: q-bio
27
The categories of this paper are: comp-gas
9
The categories of this paper are: nlin
19
The categories of this paper are: eess
3
The categories of this paper are: physics
17
The categories of this paper are: q-fin
13
The categories of this paper are: quant-ph
31
The categories of this paper are: ao-sci
29
The categories of this paper are: funct-an
14
The categories of this paper are: math-ph
2
The categories of this paper are: math
20
The categories of this paper are: acc-phys
28
The categories of this paper are: alg-geom
4
The categories of this paper are: cond-mat