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Please use this identifier to cite or link to this item: http://hdl.handle.net/2248/3765
Title: The variation of photospheric active regions in HD 127535
Authors: Mekkaden, M. V
Geyer, E. H
Keywords: H alpha line
Luminous intensity
Photometry
Starspots
Stellar atmospheres
UBV spectra
Computational astrophysics
Light curve
Light sources
Radio emission
Issue Date: Apr-1988
Publisher: European Southern Observatory
Citation: Astronomy and Astrophysics , Vol. 195, No. 1 - 2, pp. 214 - 217
Abstract: UBVRI photometry of the chromospherically active star HD 127535 obtained during April 1987 is presented. The analysis shows that the light variation is quasi-sinusoidal and the amplitude and the phase of the light minimum have changed drastically compared to the previous observations. These changes are attributed to the formation and evolution of magnetically active regions on the stellar surface. Furthermore, a quantitative analysis of the observations available in the literature since 1981 indicates that the sudden changes in activity on HD 127535 may be caused by short-lived spot groups rather than a single spot of longer life time. The maximum activity on HD 127535 occured during 1985.
URI: http://hdl.handle.net/2248/3765
ISSN: 0004-6361
Appears in Collections:IIAP Publications

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