Astronomy and Astrophysics Supplement Series, Vol. 120, December II 1996, 451-455
Polarisation in A-type stars with circumstellar shells
Indian Institute of Astrophysics, Bangalore 560034, India
Received March 13; accepted May 17, 1996
Abstract:We present the results of optical linear polarisation measurements of about 30 A-type stars that are known to be either Ae/A shell stars or have shown anomalous emission in the infrared. Compared with the general population of A-type stars, stars of this group are found to have polarisation that is also anomalous and is suggested to be circumstellar in origin.
Key words: polarisation --- stars: emission-line --- stars: circumstellar matter --- infrared: stars