Juri Poutanen

Jan 31, 2025 | aanda.org | Alessandro Papitto |Alessandro Di Marco |Juri Poutanen

Home All issues Volume 694 (February 2025) A&A, 694 (2025) A37 Full HTML Issue A&A Volume 694, February 2025 Article Number A37 Number of page(s) 9 Section Astrophysical processes DOI https://doi.org/10.1051/0004-6361/202451775 Published online 30 January 2025 A&A, 694, A37 (2025) Discovery of polarized X-ray emission from the accreting millisecond pulsar SRGA J144459.2–604207 1⋆, 2, 3,4, 5,6, 1,7,8, 2,7,8, 1, 3, 9, 1,8, 10,11, 9, 12,13, 14, 1, 3, 15, 1, 16, 17, 18, 11, 1, 19,20 and 15 1 INAF...

Aug 7, 2024 | mdpi.com | Juri Poutanen |Sergey S Tsygankov |Sofia V. Forsblom

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Jun 17, 2024 | nature.com | Jeremy Heyl |Victor Doroshenko |Ilaria Caiazzo |Juri Poutanen |Sergey S Tsygankov |Matteo Bachetti | +62 more

AbstractIn an accreting X-ray pulsar, a neutron star accretes matter from a companion star through an accretion disk. The magnetic field of the rotating neutron star disrupts the inner edge of the disk, funnelling the gas to flow onto the poles on its surface. Hercules X-1 is a prototypical persistent X-ray pulsar about 7 kpc from Earth.

Sep 4, 2023 | aanda.org | Victor Doroshenko |Universität Tübingen |Juri Poutanen |Jeremy Heyl

Home All issues Volume 677 (September 2023) A&A, 677 (2023) A57 Full HTML Issue A&A Volume 677, September 2023 Article Number A57 Number of page(s) 10 Section Stellar structure and evolution DOI https://doi.org/10.1051/0004-6361/202347088 Published online 04 September 2023 A&A 677, A57 (2023) Complex variations in X-ray polarization in the X-ray pulsar LS V +44 17/RX J0440.9+4431 1, 2, 3, 2, 4, 5,6, 2,7, 8, 2, 9, 2, 10, 11, 1, 12, 12, 12, 13,12, 1, 2, 2, 2, 14, 15,16, 17, 18,19, 8, 18, 20, 8,...

Jul 17, 2023 | nature.com | Steven R. Ehlert |Dawoon Kim |Immacolata Donnarumma |Ioannis Liodakis |Iván Agudo |Svetlana G. Jorstad | +71 more

AbstractThe magnetic-field conditions in astrophysical relativistic jets can be probed by multiwavelength polarimetry, which has been recently extended to X-rays. For example, one can track how the magnetic field changes in the flow of the radiating particles by observing rotations of the electric vector position angle Ψ. Here we report the discovery of a ΨX rotation in the X-ray band in the blazar Markarian 421 at an average flux state.