Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Stellar Coronal Spectroscopy with the Chandra HETGS   Spectroscopy with the Chandra High Energy Transmission Grating Spectrometer
provides details on X-ray emission and activity from young and cool stars
through resolution of emission lines from a variety of ions. We are beginning
to see trends in activity regarding abundances, emission measures, and
variability. Here we contrast spectra of TV Crt, a weak-lined T Tauri star,
with TW Hya, a Classical T Tauri star. TV Crt has a spectrum more like magnetic
activity driven coronae, relative to the TW Hya spectrum, which we have
interpreted as due to accretion-produced X-rays. We have also observed the long
period system, IM Pegasi to search for rotational modulation, and to compare
activity in a long period active binary to shorter period systems and to the
pre-main sequence stars. We detected no rotational modulation, but did see
long-duration flares.

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The categories of this paper are: hep-lat
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The categories of this paper are: comp-gas
3
The categories of this paper are: physics
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The categories of this paper are: atom-ph
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The categories of this paper are: stat
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The categories of this paper are: hep-th
36
The categories of this paper are: cmp-lg
1
The categories of this paper are: cs
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The categories of this paper are: solv-int
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The categories of this paper are: ao-sci
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The categories of this paper are: funct-an
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The categories of this paper are: dg-ga
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The categories of this paper are: quant-ph
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The categories of this paper are: math-ph
4
The categories of this paper are: cond-mat
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The categories of this paper are: eess