Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Formation of Bimodal Dust Species in Nova Ejecta I: Chemical
  Conditions   The formation of bimodal dust species (that is, both of silicate and
amorphous carbon dust grains are observed in a nova eruption) in nova ejecta is
still debated. Using the Modules for Experiments in Stellar Astrophysics code
and considering the effects of WD's mass, mass-accretion rate and the chemical
profiles of WD which are described by new parameter --- mixing depth on the
chemical abundances of nova ejecta, we investigate the possibility that bimodal
dust species are produced in a nova eruption. We find that $C/O$ (the ratio of
carbon number density to oxygen number density) of nova ejecta is affected by
the mixing depth. For the model with a small mixing depth, the $C/O$ of nova
ejecta can evolute from lager than 1.0 to smaller than 1.0 in a whole eruption,
which provides the chemical condition for the formation of bimodal dust
species.

13
The categories of this paper are: quant-ph
15
The categories of this paper are: nucl-ex
20
The categories of this paper are: acc-phys
26
The categories of this paper are: bayes-an
0
The categories of this paper are: hep-ph
21
The categories of this paper are: adap-org
28
The categories of this paper are: alg-geom
3
The categories of this paper are: physics
12
The categories of this paper are: nucl-th
7
The categories of this paper are: hep-th
32
The categories of this paper are: atom-ph
27
The categories of this paper are: comp-gas
18
The categories of this paper are: econ
34
The categories of this paper are: chem-ph
22
The categories of this paper are: chao-dyn
5
The categories of this paper are: gr-qc