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Optical polarimetry and photometry of young sun-like star LO Peg

Published online by Cambridge University Press:  26 August 2011

J. C. Pandey ,
B. J. Medhi  and
R. Sagar
J. C. Pandey
Affiliation:
Aryabhatta Research Institute of Observational Sciences, Nainital, India -263129 email: jeewan@aries.res.in
B. J. Medhi
Affiliation:
Aryabhatta Research Institute of Observational Sciences, Nainital, India -263129 email: jeewan@aries.res.in
R. Sagar
Affiliation:
Aryabhatta Research Institute of Observational Sciences, Nainital, India -263129 email: jeewan@aries.res.in
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Abstract

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We have carried out the B,V and R-band polarimetric and V-band photometric study of the star LO Peg. Our analysis reveal that LO Peg is highly polarized among the sun-like stars. The degree of polarization and polarization position angle are found to be rotationally modulated. The levels of polarization observed in LO Peg could be the result of scattering of an anisotropic stellar radiation field by an optically thin circumstellar envelope or scattering of the stellar radiation by prominence-like structures. The long term photometric observations of LO Peg indicate three independent groups of spots are present on the surface of LO Peg.

Keywords

Stars: activitystars: late-typestars: spotstechniques: photometrictechniques: polarimetric
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 6 , Symposium S273: The Physics of Sun and Star Spots , August 2010 , pp. 455 - 459
Copyright
Copyright © International Astronomical Union 2011

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