THE ROTATION PERIOD OF EPSILON-ERI FROM PHOTOMETRY OF ITS STARSPOTS

被引：13

作者：

FREY, GJ

GRIM, B

HALL, DS

MATTINGLY, P

ROBB, S

WOOD, J

ZEIGLER, K

机构：

[1] VANDERBILT UNIV,DYER OBSERV,NASHVILLE,TN 37235

[2] TENNESSEE STATE UNIV,CTR EXCELLENCE INFORMAT SYST,NASHVILLE,TN 37203

[3] NIGHTWATCH OBSERV,FAIR OAKS,CA 95628

[4] GREENTREE OBSERV,TEMPE,AZ 85284

[5] FAUN LANE OBSERV,GARDEN GROVE,CA 92641

[6] GILA ASTRON RES INST,CLAYPOOL,AZ 85532

来源：

ASTRONOMICAL JOURNAL | 1991年 / 102卷 / 05期

关键词：

D O I：

10.1086/116005

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

BV photometry at six observatories in 1988/1989 and 1989/1990 shows variability resulting from five starspots which lived 1 or 2 months each, had rotation periods in the range 10.d0 < P < 12.d3, and had amplitudes in the range 0.m01-0.m03. From the range in P we estimate k > 0.20 +/- 0.05 for the differential rotation coefficient. Ca II K-line photometry, polarimetry, and earlier photometry reported in the literature has also shown variability with periodicities in the same 10d-12d range.

引用

页码：1813 / 1815

页数：3

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