J/A+A/526/A44 Observations of II Peg (Lindborg+, 2011)
Doppler images of the RS Canum Venaticorum binary II Pegasi during the years
1994-2002.
Lindborg M., Korpi M.J., Hackman T., Tuominen I., Ilyin I., Piskunov N.
<Astron. Astrophys. 526, A44 (2011)>
=2011A&A...526A..44L 2011A&A...526A..44L
ADC_Keywords: Stars, variable ; Spectroscopy
Keywords: stars: individual: HD 224085 - stars: activity - stars: imaging -
starspots
Abstract:
We publish 16 Doppler imaging temperature maps for the years
1994-2002 of the active RS CVn star II Peg. The six maps from
1999-2002 are based on previously unpublished observations. Through
Doppler imaging we want to study the spot evolution of the star and in
particular compare this with previous results showing a cyclic spot
behaviour and persistent active longitudes.
Description:
The observations were collected with the SOFIN spectrograph at the
Nordic Optical Telescope. The temperature maps were calculated using
a Doppler imaging code based on Tikhonov regularization.
Objects:
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RA (2000) DE Designation(s)
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23 55 04.1 +28 38 01 II Peg = HD 224085
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 27 144 Summary of the observations 1994-1995, 1996-1998,
and 1999-2002
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See also:
J/A+A/334/863 : II Peg radial velocities (Berdyugina+ 1998)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 14 F14.6 d HJD Heliocentric Julian date
16- 23 F8.6 --- Phase Phase calculated based on the ephemeris
given in the paper
25- 27 I3 --- S/N Signal-to-Noise Ratio
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Acknowledgements:
Marjaana Lindborg, marjaana.lindborg(at)helsinki.fi
(End) Patricia Vannier [CDS] 16-Nov-2010