Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The asynchronous polar V1432 Aquilae and its path back to synchronism   V1432 Aquilae is the only known eclipsing asynchronous polar. In this respect
it is unique and therefore merits our attention. We report the results of a
15-year campaign by the globally distributed Center for Backyard Astrophysics
to observe V1432 Aql and investigate its return to synchronism. Originally
knocked out of synchrony by a nova explosion before observing records began,
the magnetic white dwarf in V1432 Aql is currently rotating slower than the
orbital period but is gradually catching up. The fortuitously high inclination
of the binary orbit affords us the bonus of eclipses providing a regular clock
against which these temporal changes can be assessed. At the present rate,
synchronism should be achieved around 2100. The continually changing trajectory
of the accretion stream as it follows the magnetic field lines of the rotating
white dwarf produces a complex pattern of light emission which we have measured
and documented, providing comprehensive observational evidence against which
physical models of the system can be tested.

28
The categories of this paper are: alg-geom
22
The categories of this paper are: chao-dyn
21
The categories of this paper are: adap-org
31
The categories of this paper are: ao-sci
12
The categories of this paper are: nucl-th
18
The categories of this paper are: econ
2
The categories of this paper are: math
24
The categories of this paper are: dg-ga
11
The categories of this paper are: hep-lat
15
The categories of this paper are: nucl-ex
19
The categories of this paper are: eess
29
The categories of this paper are: funct-an
34
The categories of this paper are: chem-ph
10
The categories of this paper are: q-bio
13
The categories of this paper are: quant-ph
30
The categories of this paper are: q-alg