Optical Polarization and Near‐Infrared Photometry of the Proto–planetary Nebula Henize 3‐1475 | Zendy

C. V. Rodrigues | Zendy; F. Jablonski | Zendy; J. GregorioHetem | Zendy; G. R. Hickel | Zendy; M. J. Sartori | Zendy

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Optical Polarization and Near‐Infrared Photometry of the Proto–planetary Nebula Henize 3‐1475

Author(s) -

C. V. Rodrigues,

F. Jablonski,

J. GregorioHetem,

G. R. Hickel,

M. J. Sartori

Publication year - 2003

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/368073

Subject(s) - physics , polarization (electrochemistry) , photometry (optics) , nebula , astrophysics , position angle , infrared , polarimetry , monte carlo method , stars , planetary nebula , astronomy , optics , galaxy , scattering , chemistry , statistics , mathematics

We present BVRI CCD aperture polarization and near-infrared photometry of theproto-planetary nebula Hen 3-1475. Its intrinsic polarization is high and showsa strong spectral dependence. The position angles in all bands areperpendicular to the axis of the observed bipolar structure. A Monte Carlo codeis used to model the intrinsic polarization of \hhe. Using disk dimensions andother constraints suggested by previous works, we are able to reproduce theobservations with an optically thick disk composed by grains with a power-lawsize distribution ranging from 0.06 to 0.22 um. We also reliably estimate theforeground polarization from hundreds of stars contained in the CCD images. Itis parallel to the intrinsic polarization of Hen 3-1475. Possible implicationsof this result are discussed. From IR observations, we estimate a interstellarreddening, A(V), of about 3.2.Comment: ApJ accepted, 16 pages, 6 figure

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