{"product_id":"x-ray-studies-of-the-central-engine-in-active-galactic-nuclei-with-suzaku-von-hirofumi-noda","title":"X-ray Studies of the Central Engine in Active Galactic Nuclei with Suzaku","description":"The aim of this research was to use the X-ray satellite Suzaku to establish a picture of a central engine that effectively converts the gravitational energy of accreting matter onto the supermassive black hole to a huge amount of radiation in an active galactic nucleus. Although the engine is known to consist of a Comptonizing corona and an accretion disk, its image has remained unclear because primary emissions, coming directly from the engine, cannot be identified in X-ray spectra without models. The book describes a technique of time variability assisted spectral decomposition to model-independently examine X-ray signals, and how this was applied to the Suzaku archive data of active galactic nuclei. As a result, at least three distinct primary X-ray components have been discovered in an X-ray from an active galactic nucleus, presumably indicating a novel picture that the engine is composed of multiple coronae with different physical properties in an accretion flow. Furthermore, the determination of the spectral shapes of the primary X-rays has a significant impact on estimations of black hole spins, because it is essential to quantify reprocessed X-ray spectra. The successful model-independent decomposition of X-ray spectral components with flux variations of active galactic nuclei is likely to be effective in future data analyses from the soon-to-be-launched Japanese X-ray satellite ASTRO-H, which is capable of achieving unprecedented fine spectroscopy and broad energy band coverage.\u003cdiv class=\"aw-variant-hidden-subtitle-div\" id=\"aw-variant-subtitle-9789812877208\"\u003e\u003ch3\u003e\u003c\/h3\u003e\u003c\/div\u003e\u003cdiv class=\"aw-variant-hidden-subtitle-div\" id=\"aw-variant-subtitle-9789811357084\"\u003e\u003ch3\u003e\u003c\/h3\u003e\u003c\/div\u003e","brand":"Autorenwelt Shop","offers":[{"title":"Hardcover - 9789812877208","offer_id":40150916890717,"sku":"9789812877208","price":106.99,"currency_code":"EUR","in_stock":true},{"title":"Softcover - 9789811357084","offer_id":40150916857949,"sku":"9789811357084","price":106.99,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0940\/0622\/files\/f94d01eb-b83d-453a-a1f6-54344db78a6a.jpg?v=1775889383","url":"https:\/\/shop.autorenwelt.de\/products\/x-ray-studies-of-the-central-engine-in-active-galactic-nuclei-with-suzaku-von-hirofumi-noda","provider":"Autorenwelt Shop","version":"1.0","type":"link"}