Multiwavelength Observations of the Gamma-Ray Binary PSR J2032+4127/MT91 213 near Periastron
Abstract
PSR J2032+4127/MT91 213 is a unique gamma-ray binary consisting of a young pulsar and a Be star in a very long orbit of 50 years. We carried out a multiwavelength observation campaign during the periastron passage in late 2017. We show that the X-ray spectrum of the system hardened near periastron, with a significant decrease in the power-law photon index from Γ ~2 to 1.2 and evidence of increased absorption column density. We also discovered coincident radio and X-ray flares one week after periastron, which is possibly the result of the pulsar wind interacting with the Be stellar disk and generating synchrotron radiation. However, a multiwavelength comparison indicates that the X-ray and radio spectra cannot be simply connected by a single PL component. Hence, the emission in these two energy bands must originate from different particle populations.
- Publication:
-
American Astronomical Society Meeting Abstracts #235
- Pub Date:
- January 2020
- Bibcode:
- 2020AAS...23530202N