2001A&A...370..974D


C.D.S. - SIMBAD4 rel 1.7 - 2020.10.25CET09:49:58

2001A&A...370..974D - Astronomy and Astrophysics, volume 370, 974-981 (2001/5-2)

The radial velocities of the RS CVn star UX Ari. A triple system with a binary on the same line of sight.

DUEMMLER R. and AARUM V.

Abstract (from CDS):

UX Ari belongs to the class of very active RS CVn stars and has recently been the target of surface (Doppler) imaging. Although this technique needs a quite accurate determination of the orbit (in order to have the correct period for phasing and the correct Doppler shift correction of the line profiles) we found only one, quite old orbit solution, which has subsequently been used by everyone. We used published radial velocities (RVs), supplemented by a large number (124) of our own recent, high-accuracy RVs of both the primary (K0IV) and the secondary (G5V) to improve the orbit of UX Ari. In addition to the improved set of parameters, we found that the γ velocity of the system is systematically changing over time. It seems that UX Ari is a triple system. Actually, a third star is weakly present in the spectrum. While its RV is also changing, it is not a member of the system, but happens to be on the same line of sight. Finally, conclusions about the physical parameters of the objects from the orbits are presented.

Abstract Copyright:

Journal keyword(s): stars: individual: UX Ari - stars: binaries: spectroscopic - stars: late-type - stars: activity - techniques: radial velocities

VizieR on-line data: <Available at CDS (J/A+A/370/974): table2.dat>

Simbad objects: 7

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Number of rows : 7

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 V* UX Ari RS* 03 26 35.3764089427 +28 42 54.211100955 7.76 7.28 6.37     K0IV 665 0
2 HD 23565 PM* 03 48 37.4615935629 +51 49 23.771445113 10.292 8.32 7.70     G5V 26 0
3 HD 51419 PM* 06 58 11.7501358463 +22 28 33.184189940 7.630 7.560 6.940     G5VFe-1 73 0
4 * bet Gem PM* 07 45 18.94987 +28 01 34.3160 3.00 2.14 1.14 0.39 -0.11 K0IIIb 1049 1
5 HD 71148 PM* 08 27 36.7845769755 +45 39 10.757178045   6.94   5.9   G1V 174 0
6 HD 71952 PM* 08 32 33.4471902951 +53 06 53.450085479   7.252 6.226     K0IV 38 0
7 * 14 LMi PM* 09 46 42.4846931065 +45 06 51.816523578   7.762 6.812     K0IV 45 0

    Equat.    Gal    SGal    Ecl

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2020.10.25-09:49:58

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