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PEXO : a global modeling framework for nanosecond timing, microsecond astrometry, and μm/s radial velocities. / Feng, Fabo; Lisogorskyi, Maksym; Jones, Hugh R. A.; Kopeikin, Sergei M.; Butler, R. Paul; Anglada-Escude, Guillem; Boss, Alan P.

In: Astrophysical Journal Supplement, Vol. 244, 39, 15.10.2019.

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Feng, Fabo ; Lisogorskyi, Maksym ; Jones, Hugh R. A. ; Kopeikin, Sergei M. ; Butler, R. Paul ; Anglada-Escude, Guillem ; Boss, Alan P. / PEXO : a global modeling framework for nanosecond timing, microsecond astrometry, and μm/s radial velocities. In: Astrophysical Journal Supplement. 2019 ; Vol. 244.

Bibtex

@article{4de01e12bd8347b7ad83c86d3fc10dac,
title = "PEXO: a global modeling framework for nanosecond timing, microsecond astrometry, and μm/s radial velocities",
abstract = " The ability to make independent detections of the signatures of exoplanets with complementary telescopes and instruments brings a new potential for robust identification of exoplanets and precision characterization. We introduce PEXO, a package for Precise EXOplanetology to facilitate the efficient modeling of timing, astrometry, and radial velocity data, which will benefit not only exoplanet science but also various astrophysical studies in general. PEXO is general enough to account for binary motion and stellar reflex motions induced by planetary companions and is precise enough to treat various relativistic effects both in the solar system and in the target system. We also model the post-Newtonian barycentric motion for future tests of general relativity in extrasolar systems. We benchmark PEXO with the pulsar timing package TEMPO2 and find that PEXO produces numerically similar results with timing precision of about 1 ns, space-based astrometry to a precision of 1{\mu}as, and radial velocity of 1 {\mu}m/s and improves on TEMPO2 for decade-long timing data of nearby targets, due to its consideration of third-order terms of Roemer delay. PEXO is able to avoid the bias introduced by decoupling the target system and the solar system and to account for the atmospheric effects which set a practical limit for ground-based radial velocities close to 1 cm/s. Considering the various caveats in barycentric correction and ancillary data required to realize cm/s modeling, we recommend the preservation of original observational data. The PEXO modeling package is available at GitHub (https://github.com/phillippro/pexo). ",
keywords = "astro-ph.EP, astro-ph.IM, astro-ph.SR",
author = "Fabo Feng and Maksym Lisogorskyi and Jones, {Hugh R. A.} and Kopeikin, {Sergei M.} and Butler, {R. Paul} and Guillem Anglada-Escude and Boss, {Alan P.}",
note = "54 pages, 2 tables, 19 figures, accepted for publication in ApJS, PEXO is available at https://github.com/phillippro/pexo",
year = "2019",
month = oct,
day = "15",
doi = "10.3847/1538-4365/ab40b6",
language = "English",
volume = "244",
journal = "Astrophysical Journal, Supplement Series",
issn = "0067-0049",
publisher = "IOP Publishing Ltd.",

}

RIS

TY - JOUR

T1 - PEXO

T2 - a global modeling framework for nanosecond timing, microsecond astrometry, and μm/s radial velocities

AU - Feng, Fabo

AU - Lisogorskyi, Maksym

AU - Jones, Hugh R. A.

AU - Kopeikin, Sergei M.

AU - Butler, R. Paul

AU - Anglada-Escude, Guillem

AU - Boss, Alan P.

N1 - 54 pages, 2 tables, 19 figures, accepted for publication in ApJS, PEXO is available at https://github.com/phillippro/pexo

PY - 2019/10/15

Y1 - 2019/10/15

N2 - The ability to make independent detections of the signatures of exoplanets with complementary telescopes and instruments brings a new potential for robust identification of exoplanets and precision characterization. We introduce PEXO, a package for Precise EXOplanetology to facilitate the efficient modeling of timing, astrometry, and radial velocity data, which will benefit not only exoplanet science but also various astrophysical studies in general. PEXO is general enough to account for binary motion and stellar reflex motions induced by planetary companions and is precise enough to treat various relativistic effects both in the solar system and in the target system. We also model the post-Newtonian barycentric motion for future tests of general relativity in extrasolar systems. We benchmark PEXO with the pulsar timing package TEMPO2 and find that PEXO produces numerically similar results with timing precision of about 1 ns, space-based astrometry to a precision of 1{\mu}as, and radial velocity of 1 {\mu}m/s and improves on TEMPO2 for decade-long timing data of nearby targets, due to its consideration of third-order terms of Roemer delay. PEXO is able to avoid the bias introduced by decoupling the target system and the solar system and to account for the atmospheric effects which set a practical limit for ground-based radial velocities close to 1 cm/s. Considering the various caveats in barycentric correction and ancillary data required to realize cm/s modeling, we recommend the preservation of original observational data. The PEXO modeling package is available at GitHub (https://github.com/phillippro/pexo).

AB - The ability to make independent detections of the signatures of exoplanets with complementary telescopes and instruments brings a new potential for robust identification of exoplanets and precision characterization. We introduce PEXO, a package for Precise EXOplanetology to facilitate the efficient modeling of timing, astrometry, and radial velocity data, which will benefit not only exoplanet science but also various astrophysical studies in general. PEXO is general enough to account for binary motion and stellar reflex motions induced by planetary companions and is precise enough to treat various relativistic effects both in the solar system and in the target system. We also model the post-Newtonian barycentric motion for future tests of general relativity in extrasolar systems. We benchmark PEXO with the pulsar timing package TEMPO2 and find that PEXO produces numerically similar results with timing precision of about 1 ns, space-based astrometry to a precision of 1{\mu}as, and radial velocity of 1 {\mu}m/s and improves on TEMPO2 for decade-long timing data of nearby targets, due to its consideration of third-order terms of Roemer delay. PEXO is able to avoid the bias introduced by decoupling the target system and the solar system and to account for the atmospheric effects which set a practical limit for ground-based radial velocities close to 1 cm/s. Considering the various caveats in barycentric correction and ancillary data required to realize cm/s modeling, we recommend the preservation of original observational data. The PEXO modeling package is available at GitHub (https://github.com/phillippro/pexo).

KW - astro-ph.EP

KW - astro-ph.IM

KW - astro-ph.SR

U2 - 10.3847/1538-4365/ab40b6

DO - 10.3847/1538-4365/ab40b6

M3 - Article

VL - 244

JO - Astrophysical Journal, Supplement Series

JF - Astrophysical Journal, Supplement Series

SN - 0067-0049

M1 - 39

ER -