pith. sign in

arxiv: 1407.0112 · v2 · pith:JH5BBH6Qnew · submitted 2014-07-01 · 🌌 astro-ph.HE

NuSTAR Detection Of A Cyclotron Line In The Supergiant Fast X-ray Transient IGR J17544-2619

Varun Bhalerao (1) , Patrizia Romano (2) , John Tomsick (3) , Lorenzo Natalucci (4) , David M. Smith (5) , Eric Bellm (6) , Steven E. Boggs (3) , Deepto Chakrabarty (7)
show 43 more authors
Finn E. Christensen (8) William W. Craig (3 9) Felix Fuerst (6) Charles J. Hailey (10) Fiona A. Harrison (6) Roman A. Krivonos (3) Ting-Ni Lu (6 11) Kristin Madsen (6) Daniel Stern (12) George Younes (13) William Zhang (14) ((1) Inter University Centre for Astronomy Astrophysics India (2) INAF Istituto di Astrofisica Spaziale e Fisica Cosmica (3) Space Sciences Laboratory University of California Berkeley (4) Istituto Nazionale di Astrofisica INAF-IAPS (5) Physics Department Santa Cruz Institute for Particle Physics Santa Cruz (6) Cahill Center for Astronomy Caltech (7) Kavli Institute for Astrophysics Space Research MIT (8) DTU Space National Space Institute Technical University of Denmark (9) Lawrence Livermore National Laboratory (10) Columbia Astrophysics Laboratory Columbia University (11) Institute of Astronomy National Tsing Hua University (12) Jet Propulsion Laboratory California Institute of Technology (13) USRA NSSTC (14) NASA Goddard Space Flight Center)
This is my paper
classification 🌌 astro-ph.HE
keywords x-rayj17544-2619compactcyclotronfastfieldlinemagnetic
0
0 comments X
read the original abstract

We present NuSTAR spectral and timing studies of the Supergiant Fast X-ray Transient (SFXT) IGR J17544-2619. The spectrum is well-described by a ~1 keV blackbody and a hard continuum component, as expected from an accreting X-ray pulsar. We detect a cyclotron line at 17 keV, confirming that the compact object in IGR J17544-2619 is indeed a neutron star. This is the first measurement of the magnetic field in a SFXT. The inferred magnetic field strength, B = (1.45 +/- 0.03) * 10^12 G * (1+z) is typical of neutron stars in X-ray binaries, and rules out a magnetar nature for the compact object. We do not find any significant pulsations in the source on time scales of 1-2000 s.

This paper has not been read by Pith yet.

discussion (0)

Sign in with ORCID, Apple, or X to comment. Anyone can read and Pith papers without signing in.