Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: $\tau$ Ori and $\tau$ Lib: Two new massive heartbeat binaries   We report the discovery of two massive eccentric systems with BRITE data,
$\tau$ Ori and $\tau$ Lib, showing heartbeat effects close to the periastron
passage. $\tau$ Lib exhibits shallow eclipses that will soon vanish due to the
apsidal motion in the system. In neither system, tidally excited oscillations
were detected.

23
The categories of this paper are: solv-int
32
The categories of this paper are: atom-ph
15
The categories of this paper are: nucl-ex
3
The categories of this paper are: physics
25
The categories of this paper are: patt-sol
5
The categories of this paper are: gr-qc
35
The categories of this paper are: mtrl-th
30
The categories of this paper are: q-alg
36
The categories of this paper are: cmp-lg
19
The categories of this paper are: eess
1
The categories of this paper are: cs
31
The categories of this paper are: ao-sci
4
The categories of this paper are: cond-mat
10
The categories of this paper are: q-bio
7
The categories of this paper are: hep-th
22
The categories of this paper are: chao-dyn