Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: GPS & CSS radio sources and space-VLBI   A short overview is given of the status of research on young extragalactic
radio sources. We concentrate on Very Long Baseline Interferometric (VLBI), and
space-VLBI results obtained with the VLBI Space Observatory Programme (VSOP).
In 2012, VSOP-2 will be launched, which will allow VLBI observations at an
unprecedented angular resolution. One particular question VSOP-2 could answer
is whether some of the High Frequency Peakers (HFP) are indeed the youngest
objects in the family of GPS and CSS sources. VSOP-2 observations can reveal
their angular morphology and determine whether any are Ultra-compact Symmetric
Objects.

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The categories of this paper are: dg-ga
1
The categories of this paper are: cs
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The categories of this paper are: bayes-an
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The categories of this paper are: solv-int
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The categories of this paper are: hep-lat
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The categories of this paper are: acc-phys
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The categories of this paper are: math-ph
31
The categories of this paper are: ao-sci
2
The categories of this paper are: math
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The categories of this paper are: adap-org
3
The categories of this paper are: physics
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The categories of this paper are: comp-gas
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The categories of this paper are: chem-ph
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The categories of this paper are: hep-th
4
The categories of this paper are: cond-mat
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The categories of this paper are: cmp-lg