An X-Ray and Radio View of the 2022 Reactivation of the Magnetar SGR J1935+2154
Artikel i vetenskaplig tidskrift, 2024

Recently, the Galactic magnetar SGR J1935+2154 has garnered attention due to its emission of an extremely luminous radio burst, reminiscent of fast radio bursts (FRBs). SGR J1935+2154 is one of the most active magnetars, displaying flaring events nearly every year, including outbursts as well as short and intermediate bursts. Here, we present our results on the properties of the persistent and bursting X-ray emission from SGR J1935+2154 during the initial weeks following its outburst on 2022 October 10. The source was observed with XMM-Newton and NuSTAR (quasi-)simultaneously during two epochs, separated by ∼5 days. The persistent emission spectrum is well described by an absorbed blackbody plus power-law model up to an energy of ∼25 keV. No significant changes were observed in the blackbody temperature (kT BB ∼ 0.4 keV) and emitting radius (R BB ∼ 1.9 km) between the two epochs. However, we observed a slight variation in the power-law parameters. Moreover, we detected X-ray pulsations in all the data sets and derived a spin-period derivative of P ̇ = 5.52 ( 5 ) × 10 − 11 s s−1. This is 3.8 times larger than the value measured after the first recorded outburst in 2014. Additionally, we performed quasi-simultaneous radio observations using three 25-32 m class radio telescopes for a total of 92.5 hr to search for FRB-like radio bursts and pulsed emission. However, our analysis did not reveal any radio bursts or periodic emission.

Författare

A. Y. Ibrahim

Institut de Ciències de l'Espai (ICE) - CSIC

Institut d'Estudis Espacials de Catalunya (IEEC)

A. Borghese

Universidad de la Laguna

Instituto de Astrofísica de Canarias

Francesco Coti Zelati

Institut d'Estudis Espacials de Catalunya (IEEC)

Institut de Ciències de l'Espai (ICE) - CSIC

E. Parent

Institut de Ciències de l'Espai (ICE) - CSIC

Institut d'Estudis Espacials de Catalunya (IEEC)

A. Marino

Institut d'Estudis Espacials de Catalunya (IEEC)

Institut de Ciències de l'Espai (ICE) - CSIC

O. S. Ould-Boukattine

Netherlands Institute for Radio Astronomy (ASTRON)

Anton Pannekoek Institute for Astronomy

N. Rea

Institut de Ciències de l'Espai (ICE) - CSIC

Institut d'Estudis Espacials de Catalunya (IEEC)

S. Ascenzi

Gran Sasso Science Institute (GSSI)

Laboratori Nazionali del Gran Sasso

Istituto nazionale di astrofisica (INAF)

D. P. Pacholski

Universita' degli Studi di Milano-Bicocca

Istituto nazionale di astrofisica (INAF)

S. Mereghetti

Istituto nazionale di astrofisica (INAF)

G. L. Israel

Osservatorio Astronomico di Roma

A. Tiengo

Istituto nazionale di astrofisica (INAF)

Scuola Universitaria Superiore IUSS di Pavia

A. Possenti

Istituto nazionale di astrofisica (INAF)

M. Burgay

Istituto nazionale di astrofisica (INAF)

R. Turolla

University College London (UCL)

Università di Padova

S. Zane

University College London (UCL)

P. Esposito

Scuola Universitaria Superiore IUSS di Pavia

Istituto nazionale di astrofisica (INAF)

D. Götz

Université Paris-Saclay

S. Campana

Istituto nazionale di astrofisica (INAF)

Franz Kirsten

Chalmers, Rymd-, geo- och miljövetenskap, Onsala rymdobservatorium

M. P. Gawroński

Uniwersytet Mikolaja Kopernika

J. W. T. Hessels

Anton Pannekoek Institute for Astronomy

Netherlands Institute for Radio Astronomy (ASTRON)

Astrophysical Journal

0004-637X (ISSN) 1538-4357 (eISSN)

Vol. 965 1 87

Ämneskategorier

Astronomi, astrofysik och kosmologi

Fusion, plasma och rymdfysik

DOI

10.3847/1538-4357/ad293b

Mer information

Senast uppdaterat

2024-04-19