Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Detection of Flare-associated CME Candidates on Two M-dwarfs by GWAC and
  Fast, Time-resolved Spectroscopic Follow-ups   The flare-associated stellar coronal mass ejection (CME) in solar-like and
late type stars is quite essential for the habitability of an exoplanet. In
this paper, we report detection of flare-associated CMEs in two M-dwarfs,
thanks to the high cadence survey carried out by the Ground Wide-angle Camera
system and the fast photometric and spectroscopic follow-ups. The flare energy
in $R-$band is determined to be $1.6\times10^{35}\ \mathrm{erg}$ and
$8.1\times10^{33}\ \mathrm{erg}$ based on the modeling of their light curves.
The time-resolved spectroscopyic observations start at about 20 and 40 minutes
after the trigger in both cases. The large projected maximum velocity of
$\sim500-700\ \mathrm{km\ s^{-1}}$ suggests that the high velocity wing of
their H$\alpha$ emission lines are most likely resulted from a CME event in
both stars, after excluding the possibility of chromospheric evaporation and
coronal rain. The masses of the CMEs are estimated to be $1.5-4.5\times10^{19}\
\mathrm{g}$ and $7.1\times10^{18}\ \mathrm{g}$.

10
The categories of this paper are: q-bio
21
The categories of this paper are: adap-org
13
The categories of this paper are: quant-ph
18
The categories of this paper are: econ
8
The categories of this paper are: hep-ex
11
The categories of this paper are: hep-lat
20
The categories of this paper are: acc-phys
33
The categories of this paper are: plasm-ph
7
The categories of this paper are: hep-th
31
The categories of this paper are: ao-sci
30
The categories of this paper are: q-alg
22
The categories of this paper are: chao-dyn
1
The categories of this paper are: cs
24
The categories of this paper are: dg-ga
9
The categories of this paper are: nlin
35
The categories of this paper are: mtrl-th