Optical polarimetry of the jets of nearby radio galaxies: I. The data

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dc.contributor.author Perlman, Eric en_US
dc.contributor.author Padgett, Alex en_US
dc.contributor.author Georganopoulos, Markos en_US
dc.contributor.author Sparks, William en_US
dc.contributor.author Biretta, John en_US
dc.contributor.author O'Dea, Christopher en_US
dc.contributor.author Baum, Stefi en_US
dc.contributor.author Birkinshaw, Mark en_US
dc.contributor.author Worrall, Diana en_US
dc.contributor.author Dulwich, Fred en_US
dc.contributor.author Jester, Sebastian en_US
dc.contributor.author Martel, Andre en_US
dc.contributor.author Capetti, Alessandro en_US
dc.contributor.author Leahy, Patrick en_US
dc.date.accessioned 2006-06-19T20:10:47Z en_US
dc.date.available 2006-06-19T20:10:47Z en_US
dc.date.issued 2006-06-05 en_US
dc.identifier.issn 0004-637X en_US
dc.identifier.uri http://hdl.handle.net/1850/2037 en_US
dc.description Archived in: arXiv:astro-ph/0606119 v1 6 Jun 2006 en_US
dc.description.abstract In this paper, the first in a series, we present an overview of new Hubble Space Telescope (HST) imaging polarimetry of six nearby radio galaxies (3C 15, 3C 66B, 3C 78, 3C 264, 3C 346, and 3C 371) with optical jets. These observations triple the number of extragalactic jets with subarcsecond-resolution optical polarimetry. We discuss the polarization characteristics of each jet and, as our Stokes I images also represent by far the deepest optical images yet obtained of each of these jets, we also discuss the morphology in total flux of each jet in detail. We find evidence of high optical polarization, averaging 20%, but reaching upwards of 50% in some objects, confirming that the optical emission is synchrotron, and that the components of the magnetic fields perpendicular to the line of sight are well ordered. We find a wide range of polarization morphologies, with each jet having a somewhat different relationship between total intensity and polarized flux and the polarization position angle. We find two trends in all of these jets. First, jet “edges” are very often associated with high fractional optical polarizations, as also found in earlier radio observations of these and other radio jets. In these regions, the magnetic field vectors appear to track the jet direction, even at bends, where we see particularly high fractional polarizations. This indicates a strong link between the local magnetic field and jet dynamics. Second, optical flux maximum regions are usually well separated from maxima in fractional polarization and often are associated with polarization minima. This trend is not found in radio data and was found in our optical polarimetry of M87 with HST. However, unlike in M87, we do not find a general trend for near-90◦ rotations in the optical polarization vectors near flux maxima. We discuss possibilities for interpreting these trends, as well as implications for jet dynamics, magnetic field structure and particle acceleration. (Refer to PDF file for exact formulas). en_US
dc.format.extent 742941 bytes en_US
dc.format.mimetype application/pdf en_US
dc.language.iso en_US en_US
dc.publisher University of Chicago Press: Astronomical Journal en_US
dc.subject Galaxies-active en_US
dc.subject Galaxies-jets en_US
dc.subject Polarization en_US
dc.title Optical polarimetry of the jets of nearby radio galaxies: I. The data en_US
dc.type Preprint en_US

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