2002MNRAS.331..666J


Query : 2002MNRAS.331..666J

2002MNRAS.331..666J - Mon. Not. R. Astron. Soc., 331, 666-672 (2002/April-2)

The latitude distribution of star-spots on He 699.

JEFFERS S.V., BARNES J.R. and COLLIER CAMERON A.

Abstract (from CDS):

In this paper, the latitude distribution of star-spots is analysed for the rapidly rotating G dwarf He 699. An image has been reconstructed from data taken with the William Herschel Telescope on La Palma on 2000 October 8. The predominant magnetic field structure is a decentred polar spot at high latitude, with smaller low-latitude features also present. This result is verified by independent reconstructions using even- and odd-numbered spectra. This work confirms and extends that of Barnes et al., and provides further evidence that there is a correlation between the presence of low-latitude features and the amplitude of the photometric light curve. It is also a further step in the search for activity cycles on young G dwarfs.

Abstract Copyright: 2002 Blackwell Science Ltd

Journal keyword(s): methods: data analysis - stars: activity - stars: imaging - stars: individual: He 699 - stars: late-type - stars: spots

CDS comments: Fig.1: stars 1 and 2 not in SIMBAD

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 - 2026
#notes
1 HD 1326 PM* 00 18 22.8849799680 +44 01 22.637951588   9.61 8.14 7.3   M2V 602 0
2 * ksi Cas SB* 00 42 03.8922075864 +50 30 45.120403944 4.05 4.71 4.81 4.82 4.94 B3IV 148 0
3 V* V484 Per BY* 03 22 21.9201012551 +49 08 27.732216837   12.07 11.37     G6V 78 0
4 V* V532 Per BY* 03 26 22.2275044296 +49 25 37.501937904   11.98 11.27     G2-3V 76 0
5 Cl Melotte 20 MGr 03 26 50.6 +48 51 48           ~ 928 0
6 HD 168009 PM* 18 15 32.4633956040 +45 12 33.540706764   6.931 6.298     G1V 239 0

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