Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Astrophysical Parameters and Habitable Zone of the Exoplanet Hosting
  Star GJ 581   GJ 581 is an M dwarf host of a multiplanet system. We use long-baseline
interferometric measurements from the CHARA Array, coupled with trigonometric
parallax information, to directly determine its physical radius to be $0.299
\pm 0.010 R_{\odot}$. Literature photometry data are used to perform spectral
energy distribution fitting in order to determine GJ 581's effective surface
temperature $T_{\rm EFF}=3498 \pm 56$ K and its luminosity $L=0.01205 \pm
0.00024 L_{\odot}$. From these measurements, we recompute the location and
extent of the system's habitable zone and conclude that two of the planets
orbiting GJ 581, planets d and g, spend all or part of their orbit within or
just on the edge of the habitable zone.

21
The categories of this paper are: adap-org
29
The categories of this paper are: funct-an
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The categories of this paper are: q-fin
13
The categories of this paper are: quant-ph
4
The categories of this paper are: cond-mat
24
The categories of this paper are: dg-ga
34
The categories of this paper are: chem-ph
1
The categories of this paper are: cs
36
The categories of this paper are: cmp-lg
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The categories of this paper are: stat
18
The categories of this paper are: econ
31
The categories of this paper are: ao-sci
9
The categories of this paper are: nlin
20
The categories of this paper are: acc-phys
33
The categories of this paper are: plasm-ph
0
The categories of this paper are: hep-ph