Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Substellar-mass companions to the K-dwarf BD +14 4559 and the K-giants
  HD 240210 and BD +20 2457   We present the discovery of substellar-mass companions to three stars by the
ongoing Penn State - Toru\' n Planet Search (PTPS) conducted with the 9.2-m
Hobby-Eberly Telescope. The K2-dwarf, BD +14 4559, has a 1.5 M$_{J}$ companion
with the orbital period of 269 days and shows a non-linear, long-term radial
velocity trend, which indicates a possible presence of another planet-mass body
in the system. The K3-giant, HD 240210, exhibits radial velocity variations
that require modeling with multiple orbits, but the available data are not yet
sufficient to do it unambiguously. A tentative, one-planet model calls for a
6.9 M$_J$ planet in a 502-day orbit around the star. The most massive of the
three stars, the K2-giant, BD +20 2457, whose estimated mass is 2.8$\pm$1.5
M$_\odot$, has two companions with the respective minimum masses of 21.4 M$_J$
and 12.5 M$_J$ and orbital periods of 380 and 622 days. Depending on the
unknown inclinations of the orbits, the currently very uncertain mass of the
star, and the dynamical properties of the system, it may represent the first
detection of two brown dwarf-mass companions orbiting a giant. The existence of
such objects will have consequences for the interpretation of the so-called
brown dwarf desert known to exist in the case of solar-mass stars.

17
The categories of this paper are: q-fin
3
The categories of this paper are: physics
0
The categories of this paper are: hep-ph
7
The categories of this paper are: hep-th
1
The categories of this paper are: cs
35
The categories of this paper are: mtrl-th
15
The categories of this paper are: nucl-ex
30
The categories of this paper are: q-alg
12
The categories of this paper are: nucl-th
33
The categories of this paper are: plasm-ph
20
The categories of this paper are: acc-phys
29
The categories of this paper are: funct-an
21
The categories of this paper are: adap-org
4
The categories of this paper are: cond-mat
25
The categories of this paper are: patt-sol
11
The categories of this paper are: hep-lat