Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A new outburst in LMC-N66   This is the first report on the new outburst presented by the central star of
the LMC-N66 nebula. This object was classified as a planetary nebula, however,
its true nature is under debate. In the period 1955-1990 the central star was
almost undetectable and only nebular emission lines were observed. In 1990, the
beginning of an outburst was detected and in few months it became much brighter
and developed wide He and N lines, typical of a Wolf Rayet star of the
N-sequence. The maximum occurred in 1994 and afterwards the star slowly faded.
Analysis of its evolution showed that it has a variable mass-loss rate which
occasionally increases enormously, creating a false photosphere at a much
larger radius, making it appear a few magnitudes brighter. The present outburst
has occurred 13 years after the episode from 1994 to 2000. So far this new
event has similar characteristics although there are some significant
differences in the spectral features. We present optical and FUSE spectra
showing the main properties of this latter event.

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The categories of this paper are: alg-geom
10
The categories of this paper are: q-bio
7
The categories of this paper are: hep-th
37
The categories of this paper are: supr-con
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The categories of this paper are: econ
22
The categories of this paper are: chao-dyn
3
The categories of this paper are: physics
34
The categories of this paper are: chem-ph
0
The categories of this paper are: hep-ph
31
The categories of this paper are: ao-sci
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The categories of this paper are: dg-ga
11
The categories of this paper are: hep-lat
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The categories of this paper are: eess
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The categories of this paper are: q-fin
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The categories of this paper are: nlin
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The categories of this paper are: plasm-ph