Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Formation of mass gap objects in highly asymmetric mergers   The LIGO/Virgo Collaboration (LVC) recently reported the detection of
GW190814, a merger of a $23^{+1.0}_{-0.9}~M_{\odot}$ primary black hole (BH),
and a $2.6^{+0.08}_{-0.08}~M_{\odot}$ secondary. The secondary's mass falls
into the mass-gap regime, which refers to the scarcity of compact objects in
the mass range of 2-5 $M_{\odot}$. The first clue to the formation of the
GW190814 lies in the fact that the primary is a very massive BH. We suggest
that the secondary was born as a neutron star (NS) where a significant amount
of the supernova ejecta mass from its formation remained bound to the binary
due to the presence of the massive BH companion. The bound mass forms a
circumbinary accretion disk, and its accretion onto the NS created a mass-gap
object. In this scenario, LIGO/Virgo will only detect mass-gap objects in
binary mergers with an extreme mass ratio. We also predict a correlation
between the mass of the secondary and the mass of the primary in such
asymmetric mergers. Our model can be tested with future data from the LVC's
third-observing run.

36
The categories of this paper are: cmp-lg
22
The categories of this paper are: chao-dyn
23
The categories of this paper are: solv-int
4
The categories of this paper are: cond-mat
10
The categories of this paper are: q-bio
35
The categories of this paper are: mtrl-th
15
The categories of this paper are: nucl-ex
11
The categories of this paper are: hep-lat
8
The categories of this paper are: hep-ex
37
The categories of this paper are: supr-con
2
The categories of this paper are: math
31
The categories of this paper are: ao-sci
29
The categories of this paper are: funct-an
34
The categories of this paper are: chem-ph
33
The categories of this paper are: plasm-ph
14
The categories of this paper are: math-ph