Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: N-body Interactions will be Detectable in the HR-8799 System within 5
  years with VLTI-GRAVITY   While Keplerian orbits account for the majority of the astrometric motion of
directly-imaged planets, perturbations due to N-body interactions allow us to
directly constrain exoplanet masses in multiplanet systems. This has the
potential to improve our understanding of massive directly-imaged planets,
which nearly all currently have only model-dependent masses. The VLTI-GRAVITY
instrument has demonstrated that interferometry can achieve 100x better
astrometric precision (Gravity Collaboration et al. 2019) than existing
methods, a level of precision that makes detection of planet-planet
interactions possible. In this study, we show that in the HR-8799 system,
planet-planet deviations from currently used Keplerian approximations (Lacour
et al. 2021) are expected to be up to one-quarter of a milliarc-second within
five years, which will make them detectable with VLTI-GRAVITY. Modeling of this
system to directly constrain exoplanet masses will be crucial in order to make
precise predictions.

26
The categories of this paper are: bayes-an
20
The categories of this paper are: acc-phys
7
The categories of this paper are: hep-th
3
The categories of this paper are: physics
23
The categories of this paper are: solv-int
10
The categories of this paper are: q-bio
36
The categories of this paper are: cmp-lg
17
The categories of this paper are: q-fin
12
The categories of this paper are: nucl-th
9
The categories of this paper are: nlin
30
The categories of this paper are: q-alg
1
The categories of this paper are: cs
19
The categories of this paper are: eess
16
The categories of this paper are: stat
32
The categories of this paper are: atom-ph
2
The categories of this paper are: math