Ten Years of Monitoring 3C 273 with XMM–Newton

Journal of astrophysics and astronomy

Liu Liu1¹  Youhong Zhang1¹ 

[1] Department of Physics and Tsinghua Center for Astrophysics, Tsinghua University, Beijing, 100084, China.$$

关键词: Quasars: individual (3C 273);    X-rays: galaxies;    ultraviolet: galaxies.;   

DOI  :  

学科分类：天文学(综合)

来源: Indian Academy of Sciences

【 摘 要 】

We present ten years optical/UV/X-ray observations of 3C 273 performed using XMM–Newton between 2000 and 2009. The short-time scale variability behaviour of the soft and hard X-ray light curves may suggest different origins of the soft/hard X-ray emissions. We fit well the 0.2–10 keV X-ray spectrum with a hard power-law component plus a soft Comptonization component. The lack of 𝛤–𝐹 correlation of the hard power-law component and the weakness of iron 𝐾𝛼 lines may support dominance of the jet component. The soft X-ray excess correlates much better with ultraviolet than with the hard power-law component, strongly suggesting that soft excess emission originates from inverse Comptonization of UV photons.

【 授权许可】

Unknown