Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Evidence for deceleration in the radio jets of GRS1915+105?   There is currently a clear discrepancy in the proper motions measured on
different angular scales in the approaching radio jets of the black hole X-ray
binary GRS1915+105. Lower velocities were measured with the Very Large Array
(VLA) prior to 1996 than were subsequently found from higher-resolution
observations made with the Very Long Baseline Array and the Multi-Element Radio
Linked Interferometer Network. We initiated an observing campaign to use all
three arrays to attempt to track the motion of the jet knots from the 2006
February outburst of the source, giving us unprecedented simultaneous coverage
of all angular scales, from milliarcsecond scales out to arcsecond scales. The
derived proper motion, which was dominated by the VLA measurements, was found
to be 17.0 mas per day, demonstrating that there has been no significant
permanent change in the properties of the jets since 1994. We find no
conclusive evidence for deceleration of the jet knots, unless this occurs
within 70 mas of the core. We discuss possible causes for the varying proper
motions recorded in the literature.

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The categories of this paper are: nucl-th
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The categories of this paper are: hep-th
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The categories of this paper are: math-ph
1
The categories of this paper are: cs
19
The categories of this paper are: eess
2
The categories of this paper are: math
0
The categories of this paper are: hep-ph
26
The categories of this paper are: bayes-an
23
The categories of this paper are: solv-int
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The categories of this paper are: econ
8
The categories of this paper are: hep-ex
35
The categories of this paper are: mtrl-th
25
The categories of this paper are: patt-sol
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The categories of this paper are: supr-con
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The categories of this paper are: quant-ph
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The categories of this paper are: q-alg