Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Instability in the dense supernova neutrino gas with flavor-dependent
  angular distributions   The usual description of self-induced flavor conversions for neutrinos
(\nu's) in supernovae is based on the simplified assumption that all the \nu's
of the different species are emitted "half-isotropically" by a common
neutrinosphere, in analogy to a blackbody emission. However, realistic
supernova simulations show that \nu angular distributions at decoupling are far
from being half-isotropic and, above all, are flavor-dependent. We show that
flavor-dependent angular distributions may lead to crossing points in the
angular spectra of different \nu species (where F_{\nu_e}=F_{\nu_x} and
F_{{\bar\nu}_e}=F_{{\bar\nu}_x}) around which a new multi-angle instability can
develop. To characterize this effect, we carry out a linearized flavor
stability analysis for different SN neutrino angular distributions. We find
that this instability can shift the onset of the flavor conversions toward
low-radii and produce a smearing of the splitting features found with trivial
$\nu$ emission models. As a result the spectral differences among \nu's of
different flavors could be strongly reduced.

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The categories of this paper are: math
20
The categories of this paper are: acc-phys
31
The categories of this paper are: ao-sci
9
The categories of this paper are: nlin
28
The categories of this paper are: alg-geom
26
The categories of this paper are: bayes-an
19
The categories of this paper are: eess
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The categories of this paper are: physics
32
The categories of this paper are: atom-ph
16
The categories of this paper are: stat
15
The categories of this paper are: nucl-ex
30
The categories of this paper are: q-alg
37
The categories of this paper are: supr-con
29
The categories of this paper are: funct-an
27
The categories of this paper are: comp-gas
14
The categories of this paper are: math-ph