Journal
ASTROPHYSICAL JOURNAL
Volume 879, Issue 2, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.3847/1538-4357/ab24d9
Keywords
binaries: close; pulsars: general; shock waves
Categories
Funding
- NASA [80NSSC17K0024]
Ask authors/readers for more resources
We model millisecond pulsar winds colliding with radiatively driven companion winds in black widow and redback systems. For the redbacks, the geometry of this intrabinary shock (IBS) is quite sensitive to the expected equatorial concentration in the pulsar outflow. We thus analytically extend IBS thin-shock models to similar to sin(2n)theta pulsar winds. We compute the synchrotron emission from such shocks, including the buildup and cooling of the particle population as it accelerates along the IBS. For reasonable parameters, this IBS flux dominates the binary emission in the X-ray band. The modeling shows subtle variation in spectrum across the IBS peak, accessible to sensitive X-ray studies. As example applications, we fit archival CXO/XMM data from the black widow pulsar J1959+2048 and the redback PSR J2339-0533, finding that the model reproduces well the orbital light-curve profiles and energy spectra. The results show a very hard injected electron spectrum, indicating likely dominance by reconnection. The light-curve fitting is sensitive to the geometric parameters, including the very important orbital inclination i. Coupled with optical fits of the companion star, such IBS X-ray light-curve modeling can strongly constrain the binary geometry and the energetics of the millisecond pulsar wind.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available