2014A&A...570A..62B


C.D.S. - SIMBAD4 rel 1.7 - 2020.10.23CEST02:56:07

2014A&A...570A..62B - Astronomy and Astrophysics, volume 570A, 62-62 (2014/10-1)

Rigorous treatment of barycentric stellar motion. Perspective and light-time effects in astrometric and radial velocity data.

BUTKEVICH A.G. and LINDEGREN L.

Abstract (from CDS):

High-precision astrometric and radial-velocity observations require accurate modelling of stellar motions in order to extrapolate measurements over long time intervals, and to detect deviations from uniform motion caused, for example, by unseen companions. We aim to explore the simplest possible kinematic model of stellar motions, namely that of uniform rectilinear motion relative to the solar system barycentre, in terms of observable quantities including error propagation. The apparent path equation for uniform rectilinear motion is solved analytically in a classical (special-relativistic) framework, leading to rigorous expressions that relate the (apparent) astrometric parameters and radial velocity to the (true) kinematic parameters of the star in the barycentric reference system. We present rigorous and explicit formulae for the transformation of stellar positions, parallaxes, proper motions, and radial velocities from one epoch to another, assuming uniform rectilinear motion and taking light-time effects into account. The Jacobian matrix of the transformation is also given, allowing accurate and reversible propagation of errors over arbitrary time intervals. The light-time effects are generally very small, but exceed 0.1mas or 0.1m/s over 100yr for at least 33 stars in the Hipparcos catalogue. For high-velocity stars within a few tens of pc from the Sun, light-time effects are generally more important than the effects of the curvature of their orbits in the Galactic potential.

Abstract Copyright:

Journal keyword(s): methods: data analysis - technique: radial velocity - astrometry - parallaxes - proper motions - reference systems

Simbad objects: 35

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Number of rows : 35

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 HD 225213 Er* 00 05 24.4278018131 -37 21 26.504223709 11.074 10.022 8.562 7.589 6.432 M2V 183 0
2 * mu. Cas SB* 01 08 16.39470 +54 55 13.2264 5.93 5.86 5.17 4.55 4.13 G5Vb 545 1
3 BD-01 306 PM* 02 14 40.2992022335 -01 12 05.123755516 9.60 9.631 9.066 8.712 8.377 G0 133 0
4 Wolf 1324 PM* 03 16 26.8160295534 +38 05 55.929933749           esdK7 50 0
5 Ross 34 LM* 03 28 53.1414 +37 22 56.807   12.43 11.11 10.54   esdK7 62 0
6 BD+66 268 PM* 03 31 17.4003372547 +66 43 49.024023927 10.48 10.57 9.91 9.30 8.87 G0 160 0
7 HD 25329 PM* 04 03 14.9983565018 +35 16 23.806254921 9.75 9.37 8.50 7.75 7.23 K1VbFe-2 348 0
8 * omi02 Eri Er* 04 15 16.3197260 -07 39 10.338087 5.69 5.25 4.43 3.74 3.29 K0V 745 0
9 HD 29907 SB* 04 38 22.4006754245 -65 24 57.599417729   10.52 9.91     F8V 88 0
10 HD 33793 Ro* 05 11 40.5893175460 -45 01 06.353955874 11.624 10.433 8.853 7.9 6.899 M1VIp 284 0
11 HD 34328 PM* 05 13 05.2763883242 -59 38 44.266050124   9.95 9.46     G0wA8V 120 0
12 CD-57 1633 HV* 07 06 28.9517777029 -57 27 29.118056344   10.04 9.54     F7V 88 0
13 HD 64090 PM* 07 53 33.1186555870 +30 36 18.263360879 8.75 8.86 8.25 7.70 7.30 K0:V_Fe-3 341 0
14 CD-80 328 PM* 09 24 20.9723082165 -80 31 21.303920418   10.63 10.00     sdG 70 0
15 HD 84937 PM* 09 48 56.09801 +13 44 39.3237 8.49 8.68 8.32 7.97 7.70 F8Vm-5 723 0
16 V* DR Oct RS* 10 07 29.5259500705 -85 04 32.989590219   9.42 8.685   7.709 G3V 103 0
17 HD 95735 Er* 11 03 20.19400 +35 58 11.5682 10.030 8.960 7.520 5.99 4.79 M2+V 629 0
18 BD+44 2051 PM* 11 05 28.57798 +43 31 36.3914 11.440 10.270   7.9   M1.0Ve 270 0
19 HD 304043 PM* 11 16 00.2045864202 -57 32 51.571393210 13.666 12.848 11.516 10.497 9.132 M3.5 52 1
20 Ross 451 LM* 11 40 20.3054683893 +67 15 32.361929733   12.291   11.2   esdM0 60 0
21 HD 103095 PM* 11 52 58.7683801554 +37 43 07.240082865 7.38 7.20 6.45 5.80 5.35 K1V_Fe-1.5 750 1
22 HD 134440 PM* 15 10 12.9678041572 -16 27 46.510775897 10.69 10.217 9.426 8.913 8.441 K2V 257 0
23 HD 134439 PM* 15 10 13.0874231858 -16 22 45.866399625 10.03 9.837 9.066 8.604 8.160 sd:K1Fe-1 301 0
24 HD 140283 Pe* 15 43 03.0967798658 -10 56 00.595803430 7.508 7.711 7.212 6.63 8.21 F9VkA5mA1 862 0
25 HD 148816 PM* 16 30 28.4586643435 +04 10 41.603810207 7.75 7.81 7.28 6.82 6.49 F7V 284 0
26 NAME Gal Center reg 17 45 40.04 -29 00 28.1           ~ 11759 0
27 NAME Barnard's star BY* 17 57 48.4997994034 +04 41 36.111354228 12.497 11.24 9.511 8.298 6.741 M4V 666 2
28 HD 193901 PM* 20 23 35.8472360557 -21 22 14.228814044 9.08 9.22 8.67 8.17 7.87 F7V 258 0
29 Ross 769 PM* 21 04 53.3814348388 -16 57 31.948746396 14.061 12.946 11.467 10.505 9.421 M1.5V 56 0
30 * 61 Cyg A BY* 21 06 53.9396100677 +38 44 57.897024357 7.50 6.39 5.21 4.19 3.54 K5V 950 0
31 * 61 Cyg ** 21 06 53.95 +38 44 57.9           ~ 158 0
32 * 61 Cyg B Er* 21 06 55.2640651855 +38 44 31.362140913 8.63 7.40 6.03 4.86 3.55 K7V 670 1
33 * eps Ind PM* 22 03 21.6542294981 -56 47 09.537018193   5.75 4.69     K5V 479 0
34 HD 217987 PM* 23 05 52.0354545522 -35 51 11.058757520   8.82 7.34     M2V 218 0
35 V* SX Phe SX* 23 46 32.8929064612 -41 34 54.770795675   7.40 7.12     A3V 315 0

    Equat.    Gal    SGal    Ecl

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2020.10.23-02:56:07

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