2003A&A...402.1043A


C.D.S. - SIMBAD4 rel 1.7 - 2020.08.14CEST18:29:15

2003A&A...402.1043A - Astronomy and Astrophysics, volume 402, 1043-1053 (2003/5-2)

Separation of high resolution spectra of the multiple star system UX Ari.

AARUM ULVAS V. and ENGVOLD O.

Abstract (from CDS):

This paper presents a technique for separation of individual components in composite stellar spectra. The technique is based on a comparison of residual depths of the component spectral lines to residual depths of the corresponding spectral lines of a single star of the same spectral class. We apply the technique to high resolution spectra of the RS CVn system UX Ari, where the spectral lines from all three components are well resolved. The deduced variations in the relative flux of the primary component agree well with simultaneously obtained photometric observations of UX Ari. The starspots causing the light curve variations and the facular areas causing the chromospheric emission seem to be separated by about 180° in longitude on the surface of the primary component. We also find that the secondary component of UX Ari is subject to some chromospheric activity. Finally, some fundamental parameters of the third star in the spectrum are derived and discussed.

Abstract Copyright:

Journal keyword(s): techniques: spectroscopic - stars: activity - binaries: spectroscopic - stars: imaging - stars: individual: UX Ari - starspots

Simbad objects: 6

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Number of rows : 6

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 * kap01 Cet BY* 03 19 21.6963205 +03 22 12.715139 5.71 5.52 4.85 4.27 3.91 G5V 824 0
2 V* UX Ari RS* 03 26 35.3764089427 +28 42 54.211100955 7.76 7.28 6.37     K0IV 663 0
3 HD 23565 PM* 03 48 37.4615935629 +51 49 23.771445113 10.292 8.32 7.70     G5V 25 0
4 HD 71148 PM* 08 27 36.7845769755 +45 39 10.757178045   6.94   5.9   G1V 172 0
5 HD 76151 PM* 08 54 17.9469808897 -05 26 04.046487788 6.89 6.67 6.00     G2V 471 0
6 V* RS CVn Al* 13 10 36.9078781154 +35 56 05.587686902 8.57 8.51 7.93 7.7   F6IV+G8IV 684 0

    Equat.    Gal    SGal    Ecl

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2020.08.14-18:29:15

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