4 papers
State transitions in LMC X-3
Roberto Soria, Mat Page, Kinwah Wu
We carried out a multiwavelenght study of the black-hole candidate LMC X-3 with XMM-Newton. The system showed a transition to a low-hard state, in which the X-ray spectrum was well…
Discrete and diffuse X-ray emission in the nucleus and disk of the starburst spiral galaxy M83
Roberto Soria, Kinwah Wu
We have studied the face-on, barred spiral M83 (NGC 5236) with Chandra. Eighty-one point sources are detected (above 3.5-sigma) in the ACIS S3 image: 15 of them are within the inne…
Low and High Angular Momentum Accretion Flows in BHCs: Case Study of XTE J1550-564
Roberto Soria, Kinwah Wu, Diana Hannikainen +2
The 1998 outburst of XTE J1550-564 started with a hard X-ray spike, rising in less than a day and declining after 3-4 days; at the same time, the soft X-ray flux was rising with a…
Continuum and line emission from post-shockc flows
Mark Cropper, Kinwah Wu, Gavin Ramsay
The post-shock flow in the accretion region of MCVs is considered to be a magnetically confined cooling flow. The X-ray spectrum from this hot plasma is emitted from a range of tem…