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000001913 005__ 20160701171655.0
000001913 0247_ $$2DOI$$a10.1007/BF00640694
000001913 037__ $$aASTROimport-70
000001913 100__ $$aDenoyelle, J.
000001913 245__ $$aMain-sequence broadening in the double cluster H and Chi Persei
000001913 260__ $$c1990
000001913 520__ $$aPrecise photometric observations of stars in the double cluster h and Chi Persei reveal a large spread in the colors and magnitudes of the upper main sequence; half of the stars are variables that are Be stars or related stars. The reported age difference between both clusters is found to be spurious. Rotation apparently affects both the intrinsic and the observed colors of the early-type stars in h and Chi Persei. This result questions the validity of photometric calibrations that heavily rely on h and Chi Persei or similar clusters. 
000001913 700__ $$a Waelkens, C.
000001913 700__ $$a Cuypers, J.
000001913 700__ $$a Degryse, K.
000001913 700__ $$a Heynderickx, D.
000001913 700__ $$a Lampens, P.
000001913 700__ $$a Poedts, S.
000001913 700__ $$a Polfliet, R.
000001913 700__ $$a Rufener, F.
000001913 700__ $$a Smeyers, P.
000001913 773__ $$c109-111$$pAstrophysics and Space Science$$v169$$y1990
000001913 85642 $$ahttp://esoads.eso.org/abs/1990Ap%26SS.169..109D
000001913 905__ $$apublished in
000001913 980__ $$aREFERD