2019ApJS..244...39F


C.D.S. - SIMBAD4 rel 1.7 - 2020.10.19CEST17:57:42

2019ApJS..244...39F - Astrophys. J., Suppl. Ser., 244, 39-39 (2019/October-0)

PEXO: a global modeling framework for nanosecond timing, microarcsecond astrometry, and µm s–1 radial velocities.

FENG F., LISOGORSKYI M., JONES H.R.A., KOPEIKIN S.M., BUTLER R.P., ANGLADA-ESCUDE G. and BOSS A.P.

Abstract (from CDS):

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 µas, and radial velocity of 1 µm s–1 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 that set a practical limit for ground-based radial velocities close to 1 cm s–1. Considering the various caveats in barycentric correction and ancillary data Required to realize cm s–1 modeling, we recommend the preservation of original observational data. The PEXO modeling package is available at GitHub (https://github.com/phillippro/pexo) and Zenodo (Feng et al. 2019).

Abstract Copyright: © 2019. The American Astronomical Society. All rights reserved.

Journal keyword(s): astrometry - ephemerides - relativistic processes - stars: general - techniques: radial velocities - time

Simbad objects: 17

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Number of rows : 17

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 NAME NCP reg 00 00 00 +90 00.0           ~ 143 0
2 * tau Cet PM* 01 44 04.0834226 -15 56 14.926552 4.43 4.22 3.50 2.88 2.41 G8V 1101 1
3 BD+57 793 * 04 21 52.7044170433 +57 49 01.892074012   10.27 9.85     F5V 131 2
4 BD+57 793b Pl 04 21 52.7044170433 +57 49 01.892074012           ~ 175 1
5 * alf CMa B WD* 06 45 09.3021501316 -16 43 00.716804119   8.41 8.44     DA1.9 497 1
6 M 87 BiC 12 30 49.42338230 +12 23 28.0438581 10.16 9.59 8.63   7.49 ~ 6282 3
7 V* V645 Cen Er* 14 29 42.9451234609 -62 40 46.170818907 14.21 12.95 11.13 9.45 7.41 M5.5Ve 984 0
8 * alf Cen ** 14 39 29.71993 -60 49 55.9990   0.4 -0.1     G2V+K1V 831 0
9 * alf Cen B PM* 14 39 35.06311 -60 50 15.0992 2.89 2.21 1.33     K1V 901 1
10 * alf Cen A SB* 14 39 36.49400 -60 50 02.3737 0.96 0.72 0.01     G2V 1143 0
11 NAME Sgr A* X 17 45 40.03599 -29 00 28.1699           ~ 3515 3
12 NAME Gal Center reg 17 45 40.04 -29 00 28.1           ~ 11753 0
13 [EG97] S2 *i* 17 45 40.0442 -29 00 27.975           B0/2V 283 1
14 NAME Barnard's star BY* 17 57 48.4997994034 +04 41 36.111354228 12.497 11.24 9.511 8.298 6.741 M4V 665 2
15 Kepler-210 Ro* 19 30 00.8101566734 +43 04 59.362696026           M0V 45 1
16 Kepler-210c Pl 19 30 00.8101566734 +43 04 59.362696026           ~ 17 0
17 TRAPPIST-1 LM* 23 06 29.3684052886 -05 02 29.031690445     18.798 16.466 14.024 M7.5e 532 0

    Equat.    Gal    SGal    Ecl

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2020.10.19-17:57:42

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