Burst oscillations from neutron star LMXBs.

Thursday 19 Dec 2013, 16:00 → 17:00 Asia/Tokyo

RIBF Bldg. Room 203 (RIKEN Wako)

============================================================ 第138回 「高エネルギー宇宙物理研究室 知の共有ゼミ」 のご案内 ============================================================ 日時 : 2013年12月19日 (木曜日) 16:00から 会場 : RIBF棟会議室203号室 講師 : Sudip Bhattacharyya (Tata Institute of Fundamental Research) 題目 : Burst oscillations from neutron star LMXBs. 概要 : Thermonuclear X-ray bursts, observed from neutron star low-mass X-ray binaries (LMXBs), originate due to intermittent unstable thermonuclear burning of accreted matter accumulated on the stellar surfaces. When such a burning is azimuthally asymmetric on a spinning neutron star, variation of X-ray flux with frequencies close to the stellar spin frequency can be observed. Such a variation, known as burst oscillation, can be very useful to probe thermonuclear flame spreading on neutron stars, as well as to measure stellar parameters, for example, mass and radius. These measurements will be helpful to study a fundamental problem of physics, that is understanding the superdense degenerate matter in neutron star cores. I will briefly describe burst oscillations, and will discuss how a future X-ray space mission, such as LOFT, will be useful to measure neutron star mass and radius. 知の共有ゼミ