OPTICAL POLARIZATION STUDY ON THE REGION CENTAURUS: NGC 5662

VERGNE, MARÍA MARCELA; CARLOS FEINSTEIN; MARTINEZ, RUBEN

REVISTA MEXICANA DE ASTRONOMíA Y ASTROFíSICA

UNIV NACIONAL AUTONOMA MEXICO

Lugar: México; Año: 2018 vol. 54

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$% pm 0.13 $ and $heta_{V}$=89$^0$.6 $pm$ 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 $sim$ 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 to the polarization as the distance increase. A few of the observed stars present evidences of intrinsic polarization.