On the role of strong gravity in polarization from scattering of light in relativistic flows

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dc.creatorHorak, J.
dc.creatorKaras, V.
dc.date2005-10-18
dc.date.accessioned2026-07-07T06:43:56Z
dc.date.available2026-07-07T06:43:56Z
dc.descriptionWe study linear polarization due to scattering of light on a cloudlet of particles, taking into account the radiation drag and the gravitational pull exerted on them by a central body. Effects of special and general relativity are included by connecting a model of Beloborodov (1998) for the local polarization of scattered light with Abramowicz, Ellis & Lanza (1990) formalism for the particle motion near an ultra-compact star. Compactness of the central body and its luminosity are two critical parameters of the model. We discuss the polarization magnitude of photons, which are Thomson-scattered into direct and higher-order images. Importance of the latter is only moderate under typical conditions, but they may give rise to distinct features, which we explore in terms of a toy model. The scattered signal exhibits variations of intensity and of polarization with mutual time-lags depending on the beaming/focusing effects and the light travel time.
dc.descriptionAccepted for publication in MNRAS; 16 pages, 13 figures
dc.identifierhttps://arxiv.org/abs/astro-ph/0510532
dc.identifierhttp://arxiv.org/abs/astro-ph/0510532
dc.identifierMon.Not.Roy.Astron.Soc. 365 (2006) 813-826
dc.identifierdoi:10.1111/j.1365-2966.2005.09748.x
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/102607
dc.subjectAstrophysics
dc.titleOn the role of strong gravity in polarization from scattering of light in relativistic flows
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