ePrints

Discovery of X-Ray Polarization from the Black Hole Transient Swift J1727.8−1613

Lookup NU author(s): Dr Adam IngramORCiD, Melissa Ewing

Downloads

• Published version [.pdf]

Licence

This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).

Abstract

© 2023. The Author(s). Published by the American Astronomical Society.We report the first detection of the X-ray polarization of the bright transient Swift J1727.8−1613 with the Imaging X-ray Polarimetry Explorer. The observation was performed at the beginning of the 2023 discovery outburst, when the source resided in the bright hard state. We find a time- and energy-averaged polarization degree of 4.1% ± 0.2% and a polarization angle of 2.°2 ± 1.°3 (errors at 68% confidence level; this translates to ∼20σ significance of the polarization detection). This finding suggests that the hot corona emitting the bulk of the detected X-rays is elongated, rather than spherical. The X-ray polarization angle is consistent with that found in submillimeter wavelengths. Since the submillimeter polarization was found to be aligned with the jet direction in other X-ray binaries, this indicates that the corona is elongated orthogonal to the jet.

Publication metadata

Author(s): Veledina A, Muleri F, Dovciak M, Poutanen J, Ratheesh A, Capitanio F, Matt G, Soffitta P, Tennant AF, Negro M, Kaaret P, Costa E, Ingram A, Svoboda J, Krawczynski H, Bianchi S, Steiner JF, Garcia JA, Kravtsov V, Nitindala AP, Ewing M, Mastroserio G, Marinucci A, Ursini F, Tombesi F, Tsygankov SS, Yang Y-J, Weisskopf MC, Trushkin SA, Egron E, Iacolina MN, Pilia M, Marra L, Mikusincova R, Nathan E, Parra M, Petrucci P-O, Podgorny J, Tugliani S, Zane S, Zhang W, Agudo I, Antonelli LA, Bachetti M, Baldini L, Baumgartner WH, Bellazzini R, Bongiorno SD, Bonino R, Brez A, Bucciantini N, Castellano S, Cavazzuti E, Chen C-T, Ciprini S, De Rosa A, Del Monte E, Di Gesu L, Di Lalla N, Di Marco A, Donnarumma I, Doroshenko V, Ehlert SR, Enoto T, Evangelista Y, Fabiani S, Ferrazzoli R, Gunji S, Hayashida K, Heyl J, Iwakiri W, Jorstad SG, Karas V, Kislat F, Kitaguchi T, Kolodziejczak JJ, La Monaca F, Latronico L, Liodakis I, Maldera S, Manfreda A, Marin F, Marscher AP, Marshall HL, Massaro F, Mitsuishi I, Mizuno T, Ng C-Y, O'Dell SL, Omodei N, Oppedisano C, Papitto A, Pavlov GG, Peirson AL, Perri M, Pesce-Rollins M, Possenti A, Puccetti S, Ramsey BD, Rankin J, Roberts OJ, Romani RW, Sgro C, Slane P, Spandre G, Swartz DA, Tamagawa T, Tavecchio F, Taverna R, Tawara Y, Thomas NE, Trois A, Turolla R, Vink J, Wu K, Xie F

Publication type: Article

Publication status: Published

Journal: Astrophysical Journal Letters

Year: 2023

Volume: 958

Issue: 1

Print publication date: 20/11/2023

Online publication date: 21/11/2023

Acceptance date: 25/10/2023

Date deposited: 05/01/2024

ISSN (print): 2041-8205

ISSN (electronic): 2041-8213

Publisher: American Astronomical Society

URL: https://doi.org/10.3847/2041-8213/ad0781

DOI: 10.3847/2041-8213/ad0781

Altmetrics

Funding

Share