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X-ray polarization from accretion disk winds




TekijätNitindala, Anagha P.; Veledina, Alexandra; Poutanen, Juri

KustantajaEDP Sciences

KustannuspaikkaLES ULIS CEDEX A

Julkaisuvuosi2025

JournalAstronomy and Astrophysics

Tietokannassa oleva lehden nimiAstronomy & Astrophysics

Lehden akronyymiASTRON ASTROPHYS

Artikkelin numeroA230

Vuosikerta694

Sivujen määrä13

ISSN0004-6361

eISSN1432-0746

DOIhttps://doi.org/10.1051/0004-6361/202453188

Verkko-osoitehttps://doi.org/10.1051/0004-6361/202453188

Rinnakkaistallenteen osoitehttps://research.utu.fi/converis/portal/detail/Publication/491487289


Tiivistelmä
X-ray polarimetry is a fine tool for probing the accretion geometry and physical processes operating in the proximity of compact objects, such as black holes and neutron stars. Recent discoveries made by the Imaging X-ray Polarimetry Explorer question our understanding of the accretion picture. The observed high levels of X-ray polarization in X-ray binaries and active galactic nuclei are challenging to achieve within the conventional scenarios. We investigate the possibility that a fraction (or even all) of the observed polarized signal arises from scattering in the equatorial accretion disk winds, the slow and extended outflows, which are often detected in these systems via spectroscopic means. We find that wind scattering can reproduce the levels of polarization that are observed in these sources.

Ladattava julkaisu

This is an electronic reprint of the original article.
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Julkaisussa olevat rahoitustiedot
This research has been supported by the Academy of Finland grant 355672 (AV) and the Ministry of Science and Higher Education grant 075-15-2024-647. Nordita is supported in part by NordForsk.


Last updated on 2025-22-04 at 11:29