Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A radio jet in the prototypical symbiotic star Z And?   As part of a multi-wavelength campaign to observe the 2000--2002 outburst of
the prototypical symbiotic star Z Andromedae, we observed this object six times
each with the Multi-Element Radio Linked Interferometer Network (MERLIN) and
Very Large Array (VLA). The radio flux varied significantly during the course
of the optical outburst at all three observation frequencies (1.4, 5, and 15
GHz). A jet-like extension was present in the 2001 September MERLIN image and
appeared to be aligned perpendicularly to the plane of the binary orbit.
Assuming that the ejection took place at the beginning of the optical outburst,
the 0.06 arcsec separation between the peak of the extended emission and the
central core implies that the ejected material was moving with a velocity of
\~400 km/s. This extended emission faded on a timescale of ~months and was not
detected at any other epoch. We consider the implications of jets being a
component of a ``prototypical'' symbiotic system and compare properties of the
observed jet of Z And with those of the jets in X-ray binary systems.

12
The categories of this paper are: nucl-th
26
The categories of this paper are: bayes-an
9
The categories of this paper are: nlin
5
The categories of this paper are: gr-qc
27
The categories of this paper are: comp-gas
33
The categories of this paper are: plasm-ph
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The categories of this paper are: q-alg
11
The categories of this paper are: hep-lat
10
The categories of this paper are: q-bio
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The categories of this paper are: acc-phys
3
The categories of this paper are: physics
18
The categories of this paper are: econ
16
The categories of this paper are: stat
0
The categories of this paper are: hep-ph
37
The categories of this paper are: supr-con
34
The categories of this paper are: chem-ph