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2000MNRAS.312...70B - Mon. Not. R. Astron. Soc., 312, 70-82 (2000/February-2)
Observations of the post-common-envelope binaries EG UMa and PG 1026+002.
BLEACH J.N., WOOD J.H., CATALAN M.S., WELSH W.F., ROBINSON E.L. and SKIDMORE W.
Abstract (from CDS):
We present R-band relative photometry of EG UMa, which shows relative flux variations at around the 5 per cent level and the occurrence of a flare event. These observations are again interpreted as being the result of the intrinsic chromospheric activity of the M dwarf in this system.
We measure the semi-amplitude of the radial-velocity curve for PG 1026+002 to be 163.7±7.3km.s–1, which, being in agreement with that measured from emission lines, adds further support to the suggestion that the secondary-star emission in PG 1026+002 is also largely chromospheric in nature. Rotational velocities for PG 1026+002 were determined by measurement over the Nai absorption doublet only. The Vrotsini values obtained for PG 1026+002 using the three available template stars were all greater than expected from the assumption of synchronous rotation.
Abstract Copyright: 2000, Royal Astronomical Society
Journal keyword(s): binaries: close - stars: individual: EG UMa - stars: individual: PG 1026+002
Simbad objects: 8
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