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Related papers: AGN polarization modeling with STOKES

200 papers

Here, I overview one of the available techniques for the analysis of broad-band spectropolarimetric data, the Stokes QU-fitting. Since broad-band receivers have been installed at most radio facilities, the collection of radio data, both the…

Astrophysics of Galaxies · Physics 2021-08-24 Alice Pasetto

Present AGN and starburst models aiming to account for the observed infrared SEDs consider a physical description of the dust and a solution of the radiative transfer problem. MIR spectra obtained at different spatial scales (SST-IRS, ISO…

Astrophysics · Physics 2007-05-23 Ralf Siebenmorgen

In this Thesis, we describe the development of a three-dimensional radiative transfer code using Monte Carlo technique and its application to various astrophysical problems. This code is capable of simulating the radiation spectra coming…

High Energy Astrophysical Phenomena · Physics 2013-07-16 Himadri Ghosh

There is evidence for significant evolution in the gaseous and dust properties of galaxies since the era of cosmic noon ($1\lesssim z\lesssim 2.5$). The well known co-evolution of supermassive black holes with their host galaxies suggests a…

Astrophysics of Galaxies · Physics 2025-12-10 Devang H. Liya , David J. Rosario , Matthaios Charidis

How and when in the star formation sequence do dust grains start to grow into pebbles is a cornerstone question to both star and planet formation. We compute the polarized radiative transfer from a model solar-type protostellar core, using…

We use a 3D Monte Carlo radiative transfer code to study the polarimetric and photometric variability from stationary corotating interaction regions (CIR) in the wind of massive stars. Our CIRs are approximated by Archimedean spirals of…

Solar and Stellar Astrophysics · Physics 2019-09-25 Danny Carlos-Leblanc , Nicole St-Louis , Jon Bjorkman , Richard Ignace

A new version of Monte Carlo generator ELRADGEN for simulation of real photon emission in elastic electron-proton scattering is presented. The extensions in the new version include opportunity to deal with polarized particles:…

High Energy Physics - Phenomenology · Physics 2009-12-14 I. Akushevich , A. Ilyichev , N. Shumeiko

Near-Eddington radiation from active galactic nuclei (AGNs) has significant dynamical influence on the surrounding dusty gas, plausibly furnishing AGNs with geometrically thick obscuration. We investigate this paradigm with radiative…

Astrophysics of Galaxies · Physics 2017-08-21 Chi-Ho Chan , Julian H. Krolik

Several models of nuclear dust in active galactic nuclei (AGN) have been presented in the literature to determine its physical and geometrical properties, usually assuming the dust density distribution as the main aspect producing…

Nuclear starburst discs (NSDs) are star-forming discs that may be residing in the nuclear regions of active galaxies at intermediate redshifts. One dimensional (1D) analytical models developed by Thompson et al. (2005) show that these discs…

High Energy Astrophysical Phenomena · Physics 2017-04-03 Raj Gohil , David R. Ballantyne

The massive hot stars play crucial role in the dynamics of galaxies. These stars influence their surroundings through strong winds which are highly structured processes. The theoretical study of the non-symmetric phenomena of the stellar…

Solar and Stellar Astrophysics · Physics 2026-01-30 Jakub Fišák , Jiří Kubát , Nicolas Moens , Brankica Kubátová

In this research note, we start exploring the influence of the narrow line region (NLR) on the optical/UV continuum polarization of active galactic nuclei (AGN). We have upgraded our previous 3-component model of a thermal Seyfert nucleus…

High Energy Astrophysical Phenomena · Physics 2012-10-11 F. Marin , R. W. Goosmann

It is widely assumed that long-wavelength infrared (IR) emission from cold dust (T~20-40K) is a reliable tracer of star formation even in the presence of a bright active galactic nucleus (AGN). Based on radiative transfer (RT) models of…

We present a wide grid of models for the structure and transmission properties of warm absorbers in active galactic nuclei (AGN). Contrary to commonly used constant density models, our absorbing cloud is assumed to be under constant total…

Astrophysics · Physics 2007-05-23 A. Rozanska , R. Goosmann , A. -M. Dumont , B. Czerny

Polars (or AM Her systems) are cataclysmic variables without a disc due to the strong magnetic field of the white dwarf. Most of their emission comes from the region where the accretion column impacts the white dwarf and cools through…

Solar and Stellar Astrophysics · Physics 2009-09-08 J. E. R. Costa , C. V. Rodrigues

One of the main reasons that triggered star formation is contentious is the failure to accurately link the observations with models in a detailed, quantitative, way. It is therefore critical to continuously test and improve the model…

Solar and Stellar Astrophysics · Physics 2012-08-17 Thomas J. Haworth , Tim J. Harries , David M. Acreman

We present a unification model for a clumpy obscurer in active galactic nuclei (AGN) and investigate the properties of the resulting X-ray spectrum. Our model is constructed to reproduce the column density distribution of the AGN population…

High Energy Astrophysical Phenomena · Physics 2019-09-04 Johannes Buchner , Murray Brightman , Kirpal Nandra , Robert Nikutta , Franz E. Bauer

Hard X-rays observed in Active Galactic Nuclei (AGNs) are thought to originate from the Comptonization of the optical/UV accretion disk photons in a hot corona. Polarization studies of these photons can help to constrain the corona geometry…

High Energy Astrophysical Phenomena · Physics 2017-11-29 Banafsheh Beheshtipour , Henric Krawczynski , Julien Malzac

I outline methods for calculating the solution of Monte Carlo Radiative Transfer (MCRT) in scattering, absorption and emission processes of dust and gas, including polarization. I provide a bibliography of relevant papers on methods with…

Solar and Stellar Astrophysics · Physics 2013-01-09 Barbara A. Whitney

In this paper, we try to explain the observed correlation between the covering factor (CF) of hot dust and the properties of active galactic nuclei (AGNs), e.g., the bolometric luminosity ($L_{\rm{bol}}$) and black hole mass…

Astrophysics of Galaxies · Physics 2015-12-09 Jian-Jian He , Yuan Liu , Shuang-Nan Zhang