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J/A+A/409/1017   Magnetic activity of 6 young solar stars. II   (Messina+, 2003)

Magnetic activity of six young solar analogues. II. Surface Differential Rotation from long-term photometry Messina S., Guinan E.F. <Astron. Astrophys. 409, 1017 (2003)> =2003A&A...409.1017M
ADC_Keywords: Photometry ; Stars, late-type ; Stars, G-type ; Stars, K-type Keywords: stars: activity - stars: late-type - stars: magnetic fields - stars: starspots Abstract: The present paper is the second of a series dedicated to the study of the magnetic activity in a selected sample of young solar analogues. The sample includes five single G0-G5V stars with ages between ~=130Myr and 700Myr: EK Dra, π1 UMa, HN Peg, κ1 Cet and BE Cet. In this study we also include the Pleiades-age (~=130Myr) K0V star DX Leo. Our analysis is based on high precision photometric observations carried out as part of "The Sun in Time" project, aimed at a multiwavelength study of stars with solar-like global properties, but with different ages and thus at different stages of evolution. Description: The following tables contain the results of the periodogram analysis performed on the photometric data of six young solar analogues plus the additional LQ Hya star. The following data are listed: first and last observing HJD, number of observing nights, rotational period, uncertainty on the rotational period, False Alarm Probability (FAP) Objects: ---------------------------------------------------------- RA (2000) DE Designation(s) (File) ---------------------------------------------------------- 00 22 51.8 -12 12 34 BE Cet = HD 1835 (table2.dat) 03 19 21.7 +03 22 13 kap1 Cet = HD 20630 (table3.dat) 08 39 11.7 +65 01 15 pi.1 UMa = HD 72905 (table4.dat) 21 44 31.2 +14 46 44 HN Peg = HD 206860 (table5.dat) 14 39 00.2 +64 17 30 EK Dra = HD 129333 (table6.dat) 09 32 43.8 +26 59 19 DX Leo = HD 82443 (table7.dat) 09 30 00.6 -10 57 48 LQ Hya = HD 82558 (table8.dat) ---------------------------------------------------------- File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2.dat 48 10 BE Cet periodogram analysis table3.dat 49 6 κ1 Cet periodogram analysis table4.dat 49 15 π1 UMa periodogram analysis table5.dat 58 41 EK Dra periodogram analysis table6.dat 56 8 HN Peg periodogram analysis table7.dat 50 15 DX Leo periodogram analysis table8.dat 55 16 LQ Hya periodogram analysis
See also: J/A+A/393/225 : Magnetic activity of 6 young solar analogues I (Messina+ 2002) Byte-by-byte Description of file: table?.dat
Bytes Format Units Label Explanations
1- 5 I5 d JD1-2440000 First observing HJD 8- 12 I5 d JD2-2440000 Last observing HJD 15- 17 I3 --- Nights Number of observing nights 21- 26 F6.4 d Per Rotational period 29- 34 F6.4 d e_Per Uncertainty on P 37- 45 E9.3 --- FAP False Alarm Probability 47 I1 --- Note [1/2]? Note (1)
Note (1): 1: primary period; 2: secondary period
Acknowledgements: Sergio Messina
(End) Patricia Bauer [CDS] 01-Sep-2003
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