Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Probing the Progenitors of Type Ia Supernovae using Circumstellar
  Material Interaction Signatures   This work aims to study different probes of Type Ia supernova progenitors
that have been suggested to be linked to the presence of circumstellar material
(CSM). In particular, we have investigated, for the first time, the link
between narrow blueshifted NaID absorption profiles and the presence and
strength of the broad high-velocity CaII near infrared triplet absorption
features seen in Type Ia supernovae around maximum light. With the probes
exploring different distances from the supernova; NaID > 10$^{17}$cm,
high-velocity CaII features < 10$^{15}$cm. For this, we have used a new
intermediate-resolution X-shooter spectral sample of 15 Type Ia supernovae. We
do not identify a link between these two probes, implying either that, one (or
both) is not physically related to the presence of CSM or that the occurrence
of CSM at the distance explored by one probe is not linked to its presence at
the distance probed by the other. However, the previously identified
statistical excess in the presence of blueshifted (over redshifted) NaID
absorption is confirmed in this sample at high significance and is found to be
stronger in Type Ia supernovae hosted by late-type galaxies. This excess is
difficult to explain as being from an interstellar-medium origin as has been
suggested by some recent modelling, as such an origin is not expected to show a
bias for blueshifted absorption. However, a circumstellar origin for these
features also appears unsatisfactory based on our new results given the lack of
link between the two probes of CSM investigated.

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The categories of this paper are: cmp-lg
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
0
The categories of this paper are: hep-ph
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The categories of this paper are: alg-geom
5
The categories of this paper are: gr-qc
34
The categories of this paper are: chem-ph
3
The categories of this paper are: physics
23
The categories of this paper are: solv-int
33
The categories of this paper are: plasm-ph
14
The categories of this paper are: math-ph
20
The categories of this paper are: acc-phys
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The categories of this paper are: supr-con
15
The categories of this paper are: nucl-ex
2
The categories of this paper are: math