Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: SN 2019hcc: A Type II Supernova Displaying Early O II Lines   We present optical spectroscopy together with ultraviolet, optical and
near-infrared photometry of SN 2019hcc, which resides in a host galaxy at
redshift 0.044, displaying a sub-solar metallicity. The supernova spectrum near
peak epoch shows a `w' shape at around 4000 {\AA} which is usually associated
with O II lines and is typical of Type I superluminous supernovae. SN 2019hcc
post-peak spectra show a well-developed H alpha P-Cygni profile from 19 days
past maximum and its light curve, in terms of its absolute peak luminosity and
evolution, resembles that of a fast-declining Hydrogen-rich supernova (SN IIL).
The object does not show any unambiguous sign of interaction as there is no
evidence of narrow lines in the spectra or undulations in the light curve. Our
tardis spectral modelling of the first spectrum shows that Carbon, Nitrogen and
Oxygen (CNO) at 19000 K reproduce the `w' shape and suggests that a combination
of non-thermally excited CNO and metal lines at 8000 K could reproduce the
feature seen at 4000 {\AA}. The Bolometric light curve modelling reveals that
SN 2019hcc could be fit with a magnetar model, showing a relatively strong
magnetic field (B > 3 x 10^14 G), which matches the peak luminosity and rise
time without powering up the light curve to superluminous luminosities. The
high-energy photons produced by the magnetar would then be responsible for the
detected O II lines. As a consequence, SN 2019hcc shows that a `w' shape
profile at around 4000 {\AA}, usually attributed to O II, is not only shown in
superluminous supernovae and hence it should not be treated as the sole
evidence of the belonging to such a supernova type.

12
The categories of this paper are: nucl-th
18
The categories of this paper are: econ
23
The categories of this paper are: solv-int
9
The categories of this paper are: nlin
36
The categories of this paper are: cmp-lg
13
The categories of this paper are: quant-ph
20
The categories of this paper are: acc-phys
28
The categories of this paper are: alg-geom
4
The categories of this paper are: cond-mat
8
The categories of this paper are: hep-ex
35
The categories of this paper are: mtrl-th
17
The categories of this paper are: q-fin
1
The categories of this paper are: cs
34
The categories of this paper are: chem-ph
31
The categories of this paper are: ao-sci
16
The categories of this paper are: stat