Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The puzzling early detection of low velocity 56Ni decay lines in SN
  2014J: Hints of a compact remnant   We show that the low-velocity 56Ni decay lines detected earlier than expected
in the type Ia SN 2014J find an explanation in the Quark-Nova Ia model which
involves the thermonuclear explosion of a tidally disrupted sub-Chandrasekhar
White Dwarf in a tight Neutron-Star-White-Dwarf binary system. The explosion is
triggered by impact from the Quark-Nova ejecta on the WD material; the
Quark-Nova is the explosive transition of the Neutron star to a Quark star
triggered by accretion from a CO torus (the circularized WD material). The
presence of a compact remnant (the Quark Star) provides: (i) an additional
energy source (spin-down power) which allows us to fit the observed light-curve
including the steep early rise; (ii) a central gravitational potential which
slows down some of the 56Ni produced to velocities of a few 1000 km/s. In our
model, the 56Ni decay lines become optically visible at ~20 days from explosion
time in agreement with observations. We list predictions that can provide
important tests for our model.

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The categories of this paper are: comp-gas
17
The categories of this paper are: q-fin
14
The categories of this paper are: math-ph
36
The categories of this paper are: cmp-lg
8
The categories of this paper are: hep-ex
35
The categories of this paper are: mtrl-th
32
The categories of this paper are: atom-ph
2
The categories of this paper are: math
11
The categories of this paper are: hep-lat
20
The categories of this paper are: acc-phys
18
The categories of this paper are: econ
21
The categories of this paper are: adap-org
31
The categories of this paper are: ao-sci
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The categories of this paper are: eess
9
The categories of this paper are: nlin
13
The categories of this paper are: quant-ph