Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Spectral modeling of type II supernovae II. A machine learning approach
  to quantitative spectroscopic analysis   There are now hundreds of publicly available supernova spectral time series.
Radiative transfer modeling of this data gives insights into the physical
properties of these explosions such as the composition, the density structure,
or the intrinsic luminosity---this is invaluable for understanding the
supernova progenitors, the explosion mechanism, or for constraining the
supernova distance. However, a detailed parameter study of the available data
has been out of reach due to the high dimensionality of the problem coupled
with the still significant computational expense. We tackle this issue through
the use of machine-learning emulators, which are algorithms for
high-dimensional interpolation. These use a pre-calculated training dataset to
mimic the output of a complex code but with run times orders of magnitude
shorter. We present the application of such an emulator to synthetic type II
supernova spectra generated with the TARDIS radiative transfer code. The
results show that with a relatively small training set of 780 spectra we can
generate emulated spectra with interpolation uncertainties of less than one
percent. We demonstrate the utility of this method by automatic spectral
fitting of two well-known type IIP supernovae; as an exemplary application, we
determine the supernova distances from the spectral fits using the
tailored-expanding-photosphere method. We compare our results to previous
studies and find good agreement. This suggests that emulation of TARDIS spectra
can likely be used to perform automatic and detailed analysis of many transient
classes putting the analysis of large data repositories within reach.

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The categories of this paper are: econ
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The categories of this paper are: alg-geom
3
The categories of this paper are: physics
9
The categories of this paper are: nlin
11
The categories of this paper are: hep-lat
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The categories of this paper are: dg-ga
31
The categories of this paper are: ao-sci
12
The categories of this paper are: nucl-th
5
The categories of this paper are: gr-qc
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The categories of this paper are: funct-an
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The categories of this paper are: chem-ph
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The categories of this paper are: chao-dyn
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The categories of this paper are: hep-ex
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The categories of this paper are: hep-ph
32
The categories of this paper are: atom-ph
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The categories of this paper are: adap-org