Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The value of astrometry for exoplanet science   Exoplanets mass measurements will be a critical next step to assess the
habitability of Earth-like planets: a key aspect of the 2020 vision in the
previous decadal survey and also central to NASA's strategic priorities.
Precision astrometry delivers measurement of exoplanet masses, allowing
discrimination of rocky planets from water worlds and enabling much better
modeling of their atmosphere improving species retrieval from spectroscopy. The
scientific potential of astrometry will be enormous. The intrinsic
astrophysical noise floor set by star spots and stellar surface activity is
about a factor of ten more benign for astrometry than for the more established
technique of Radial Velocity, widening the discovery region and pushing
detection thresholds to lower masses than previously possible. On the
instrumental side, precision astrometry is limited by optical field distortion
and detector calibration issues. Both technical challenges are now being
addressed successfully in the laboratory. However, we have identified the need
to continue these technology development efforts to achieve sub-microarcsecond
astrometry precision necessary for detection and characterization of Earth-like
planets around nearby FGK stars. The international community has realized the
importance of astrometry, and various astrometry missions have been proposed
and under development, with a few high profile missions now operational. We
believe that it is vital for the U.S. scientific community to participate in
the development of these new technologies and scientific discoveries. We
recommend exploring alternatives to incorporate astrometric capabilities into
future exoplanet flagship missions such as HABEX and LUVOIR, substantially
increasing the scientific return associated with the expected yield of
earth-like planets to be recovered.

21
The categories of this paper are: adap-org
7
The categories of this paper are: hep-th
29
The categories of this paper are: funct-an
35
The categories of this paper are: mtrl-th
1
The categories of this paper are: cs
37
The categories of this paper are: supr-con
22
The categories of this paper are: chao-dyn
16
The categories of this paper are: stat
19
The categories of this paper are: eess
11
The categories of this paper are: hep-lat
31
The categories of this paper are: ao-sci
8
The categories of this paper are: hep-ex
20
The categories of this paper are: acc-phys
9
The categories of this paper are: nlin
30
The categories of this paper are: q-alg
5
The categories of this paper are: gr-qc