Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Photometric Investigation of Novae T Pyx, BT Mon and V574 Pup at
  Quiescence by using the 2.4 m Thai National Telescope   Recurrent novae (RNe) are novae with multiple recorded outbursts powered by a
thermonuclear runaway. The outburst occurs on the surface of the white dwarf
which accompanies with a late type main-sequence or giant secondary star
transferring material onto the white dwarf primary star. They resemble
classical novae (CNe) outbursts but only RNe has more than one recorded
outbursts. RNe play an important role as one of the suspected progenitor
systems of Type Ia supernovae (SNe) which are used as primary distance
indicators in cosmology. Thus, it is important to investigate the outburst type
of CNe and RNe and finally ascertain the population of objects that might
ultimately be candidates for Type Ia SNe explosions. The proposal that RNe
occupy a region separated from CNe in an outburst amplitude versus speed class
diagram was adopted. Since the low amplitude results from the existence of an
evolved secondary and/or high mass transfer rate in the quiescent system, RNe
candidates should accordingly have low amplitude. We selected 3 preliminary
targets including T Pyx, BT Mon and V574 Pup. Their amplitudes are not that low
but the lowest amplitude that can be observed with Thai National Telescope
(TNT). We obtained their magnitudes at quiescence using ULTRASPEC camera on the
2.4-m TNT. The positions of three targets on optical and near-infrared
color-magnitude diagrams suggest that all three should have mainsequence
secondary stars. This is true for T Pyx, whose secondary star has been
confirmed its spectroscopy to be a main-sequence star, but not yet confirmed
for BT Mon and V574 Pup.

8
The categories of this paper are: hep-ex
25
The categories of this paper are: patt-sol
1
The categories of this paper are: cs
19
The categories of this paper are: eess
37
The categories of this paper are: supr-con
13
The categories of this paper are: quant-ph
20
The categories of this paper are: acc-phys
17
The categories of this paper are: q-fin
30
The categories of this paper are: q-alg
5
The categories of this paper are: gr-qc
27
The categories of this paper are: comp-gas
4
The categories of this paper are: cond-mat
7
The categories of this paper are: hep-th
11
The categories of this paper are: hep-lat
22
The categories of this paper are: chao-dyn
12
The categories of this paper are: nucl-th