Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Revision of Stellar Intrinsic Colors in the Infrared by the
  Spectroscopic Surveys   Intrinsic colors of normal stars are derived in the popularly used infrared
bands involving the 2MASS/JHKs, WISE, Spitzer/IRAC and AKARI/S9W filters. Based
on three spectroscopic surveys -- LAMOST, RAVE and APOGEE, stars are classified
into groups of giants and dwarfs, as well as metal-normal and metal-poor stars.
An empirical analytical relation of the intrinsic color is obtained with
stellar effective temperature (Teff) for each group of stars after the
zero-reddening stars are selected from the blue edge in the $J-\lambda$ versus
(Teff) diagram. It is found that metallicity has little effect on the infrared
colors. In the near-infrared bands, our results agree with previous work. In
addition, the color indexes H-W2 and Ks-W1 that are taken as constant to
calculate interstellar extinction are discussed. The intrinsic color of M-type
stars are derived separately due to lack of accurate measurement of their
effective temperature.

21
The categories of this paper are: adap-org
29
The categories of this paper are: funct-an
12
The categories of this paper are: nucl-th
37
The categories of this paper are: supr-con
10
The categories of this paper are: q-bio
2
The categories of this paper are: math
3
The categories of this paper are: physics
18
The categories of this paper are: econ
24
The categories of this paper are: dg-ga
15
The categories of this paper are: nucl-ex
1
The categories of this paper are: cs
7
The categories of this paper are: hep-th
27
The categories of this paper are: comp-gas
5
The categories of this paper are: gr-qc
20
The categories of this paper are: acc-phys
34
The categories of this paper are: chem-ph