Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A method to constrain mass and spin of GRB black hole within the NDAF
  model   Black holes (BHs) hide themselves behind various astronomical phenomena, and
their properties, i.e., mass and spin, are usually difficult to constrain. One
leading candidate for the central engine model of gamma-ray bursts (GRBs)
invokes a stellar mass BH and a neutrino-dominated accretion flow (NDAF), with
the relativistic jet launched due to neutrino-anti-neutrino annihilations. Such
a model gives rise to a matter-dominated fireball, and is suitable to interpret
GRBs with a dominant thermal component with a photospheric origin. We propose a
method to constrain BH mass and spin within the framework of this model, and
apply the method to a thermally-dominant GRB 101219B whose initial jet
launching radius $r_0$ is constrained from the data. Using our numerical model
of NDAF jets, we estimate the following constraints on the central BH: mass
$M_{\rm BH} \sim 5-9~M_\odot$, spin parameter $a_* \gtrsim 0.6$, and disk mass
$3~M_\odot \lesssim M_{\rm disk} \lesssim 4~M_\odot$. Our results also suggest
that the NDAF model is a competitive candidate for the central engine of GRBs
with a strong thermal component.

30
The categories of this paper are: q-alg
0
The categories of this paper are: hep-ph
33
The categories of this paper are: plasm-ph
13
The categories of this paper are: quant-ph
3
The categories of this paper are: physics
37
The categories of this paper are: supr-con
21
The categories of this paper are: adap-org
36
The categories of this paper are: cmp-lg
23
The categories of this paper are: solv-int
8
The categories of this paper are: hep-ex
26
The categories of this paper are: bayes-an
34
The categories of this paper are: chem-ph
29
The categories of this paper are: funct-an
4
The categories of this paper are: cond-mat
5
The categories of this paper are: gr-qc
31
The categories of this paper are: ao-sci