Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Precision angular diameters for 16 southern stars with VLTI/PIONIER   In the current era of Gaia and large, high signal to noise stellar
spectroscopic surveys, there is an unmet need for a reliable library of
fundamentally calibrated stellar effective temperatures based on accurate
stellar diameters. Here we present a set of precision diameters and
temperatures for a sample of 6 dwarf, 5 sub-giant, and 5 giant stars observed
with the PIONIER beam combiner at the VLTI. Science targets were observed in at
least two sequences with five unique calibration stars each for accurate
visibility calibration and to reduce the impact of bad calibrators. We use the
standard PIONIER data reduction pipeline, but bootstrap over interferograms, in
addition to employing a Monte-Carlo approach to account for correlated errors
by sampling stellar parameters, limb darkening coefficients, and fluxes, as
well as predicted calibrator angular diameters. The resulting diameters were
then combined with bolometric fluxes derived from broadband Hipparcos-Tycho
photometry and MARCS model bolometric corrections, plus parallaxes from Gaia to
produce effective temperatures, physical radii, and luminosities for each star
observed. Our stars have mean angular diameter and temperatures uncertainties
of 0.8% and 0.9% respectively, with our sample including diameters for 10 stars
with no pre-existing interferometric measurements. The remaining stars are
consistent with previous measurements, with the exception of a single star
which we observe here with PIONIER at both higher resolution and greater
sensitivity than was achieved in earlier work.

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The categories of this paper are: hep-lat
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The categories of this paper are: hep-ph
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The categories of this paper are: cs
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The categories of this paper are: bayes-an
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The categories of this paper are: math-ph
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The categories of this paper are: plasm-ph
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The categories of this paper are: cmp-lg
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The categories of this paper are: ao-sci
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The categories of this paper are: supr-con
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The categories of this paper are: econ
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The categories of this paper are: comp-gas
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The categories of this paper are: solv-int
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The categories of this paper are: eess
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The categories of this paper are: nucl-th
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The categories of this paper are: physics
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The categories of this paper are: gr-qc