The 2nd PANDA Symposium on Multimessager Astronomy - Jets and Shocks in the Universe

Finding a Precessional Disk around the Obscured Supergiant X-ray Binary IGR~J16318-4848

25 Apr 2013, 17:30

5m

Xi'an

Oral Talk

Speaker

Dr Jingzhi Yan (Purple Mountain Obs.)

Description

We present the results of the long-term near infrared (NIR) photometric observations on IGR~J16318-4848. Two period of 26.7 days and 79.7 days are found in the Swift/BAT light curve. A similar 80-day period is found from the $JHK$ light curve of IGR~J16318. The 26.7-day period is interpreted as the orbital period of the system and the neutron star moves in the dense circumstellar disk of the supergiant star. The same 80-day period found both in the Swift/BAT and the $JHK$ light curves might be due to the precession of the circumstellar disk, which caused by the tidal motion of the neutron star.