Optical Polarization Study on the region Centaurus: NGC 5662

M. M. VERGNE; C. FEINSTEIN; MARTINEZ, R. E.

REVISTA MEXICANA DE ASTRONOMíA Y ASTROFíSICA

UNIV NACIONAL AUTONOMA MEXICO

Lugar: Districto Federal; Año: 2018 vol. 54 p. 293 - 308

0185-1101

We present (BVRI) multicolor linear polarimetric data of 73 of the brightest stars in the open cluster NGC 5662. Our objective is study the characteristics  of the interstellar medium (ISM) towards and in the environment of it.NGC 5662 is polarimetrically characterized by P V = 2.27% ± 0.13 andθ V =89 0 .6 ± 1.17. Its Polarization Efficiency is much higher than the normal efficiency of ISM. The observed visual polarization in NGC 5662 is caused at least by three components of dust at ∼ 200 pc, 500 pc and 900 pc from the Sun.These have different polarimetric characteristics and the layer located at 500 pc has variable density. The absorption presents a different behavior tothe polarization as the distance increase. A few of the observed stars present evidences of intrinsic polarization.