X-ray properties of the mode-switching pulsar PSR B0943+10

S. Mereghetti (1) , L. Kuiper (2) , A. Tiengo (3, 1, 4) , J. Hessels (5) , W. Hermsen (2, 6) , K. Stovall (7) , A. Possenti (8) , J Rankin (9) , P Esposito (6) , R. Turolla (10) , D Mitra (9, 11) , Karen Wright (12) , B. Stappers (12) , A. Horneffer (13) , S. Osłowski (13) , M. M Serylak (14, 15) , Jean-Mathias Greissmeier (16, 15) , M. Rigoselli (17, 1)

1 OAM - INAF - Osservatorio Astronomico di Milano
2 SRON - SRON Netherlands Institute for Space Research
3 SSSUP - Scuola Universitaria Superiore Sant'Anna [Pisa]
4 INFN - Istituto Nazionale di Fisica Nucleare, Sezione di Pavia
5 ASTRON - Netherlands Institute for Radio Astronomy
6 Anton Pannekoek Institute for Astronomy
7 The University of New Mexico [Albuquerque]
8 OAC - INAF - Osservatorio Astronomico di Cagliari
9 University of Vermont [Burlington]
10 Unipd - Università degli Studi di Padova = University of Padua
11 NCRA - National Centre for Radio Astrophysics [Pune]
12 JBCA - Jodrell Bank Centre for Astrophysics
13 MPIFR - Max-Planck-Institut für Radioastronomie
14 UWC - University of the Western Cape
15 USN - Unité Scientifique de la Station de Nançay
16 LPC2E - Laboratoire de Physique et Chimie de l'Environnement et de l'Espace
17 UNIMIB - Università degli Studi di Milano-Bicocca = University of Milano-Bicocca

The mode-switching pulsar PSR B0943+10 has been extensively studied in the radio band for many years and, more recently, it has been found to vary also in X-rays, with a flux anticorrelated with the radio emission. Here we review the results of long observations of PSR B0943+10 carried out with XMM-Newton and the LOFAR, LWA and Arecibo radio telescopes in 2014. These results support a scenario in which both unpulsed non-thermal emission, likely of magnetospheric origin, and pulsed thermal emission from a small polar cap (~1500 m2) with a strong non-dipolar magnetic field (~ 1014 G), are present during both radio modes and vary in intensity in a correlated way.

Domains: Solar and Stellar Astrophysics [astro-ph.SR]

S. Mereghetti, L. Kuiper, A. Tiengo, J. Hessels, W. Hermsen, et al.. X-ray properties of the mode-switching pulsar PSR B0943+10. Journal of Physics: Conference Series, 2017, International Conference Physics of Neutron Stars - 2017. 50 years after. 10–14 July 2017, St. Petersburg, Russian Federation, 932, pp.012009. ⟨10.1088/1742-6596/932/1/012009⟩. ⟨insu-02940787⟩