Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Modified Gravity (MOG) and Heavy Neutron Star in Mass Gap   The modified gravity (MOG) theory is applied to the gravitational wave binary
merger GW190814 to demonstrate that the modified Tolman-Oppenheimer-Volkoff
equation for a neutron star can produce a mass $M=2.6 -2.7 M_\odot$, allowing
for the binary secondary component to be identified as a heavy neutron star in
the hypothesized mass gap $2.5 - 5 M_\odot$.

26
The categories of this paper are: bayes-an
24
The categories of this paper are: dg-ga
21
The categories of this paper are: adap-org
14
The categories of this paper are: math-ph
2
The categories of this paper are: math
1
The categories of this paper are: cs
15
The categories of this paper are: nucl-ex
10
The categories of this paper are: q-bio
22
The categories of this paper are: chao-dyn
8
The categories of this paper are: hep-ex
20
The categories of this paper are: acc-phys
17
The categories of this paper are: q-fin
34
The categories of this paper are: chem-ph
4
The categories of this paper are: cond-mat
7
The categories of this paper are: hep-th
11
The categories of this paper are: hep-lat