Superorbital Periods in Supergiant High-Mass X-ray Binaries
Abstract
Using data from the Swift Burst Alert Telescope (BAT) we discovered superorbital periods in four high-mass X-ray binaries accreting from the winds of supergiant primaries: 4U 1909+07 (= X 1908+075), IGR J16418-4532, IGR J16479-4514 and IGR J16493-4348. Together with a previously known superorbital period in 2S 0114+650, the systems show a surprising monotonic relationship between superorbital and orbital periods. We report on a continuing investigation of the superorbital modulation and searches for new superorbital periods including candidate superorbital modulation in IGR J16393-4643 (= AX J16390.4-4642) and 1E 1145.1-6141.
- Publication:
-
AAS/High Energy Astrophysics Division #14
- Pub Date:
- August 2014
- Bibcode:
- 2014HEAD...1412202C