{"product_id":"supermassive-black-hole-accretion-across-the-age-of-the-universe-von-anca-constantin","title":"Supermassive Black Hole Accretion Across the Age of the Universe","description":"\u003cp\u003eThis work searches for common grounds for the diversity of properties exhibited by the emission-line nuclei of galaxies, from large look-back times to the local universe. The studies presented here include: (1) a program of high signal-to-noise spectroscopy for 44 high redshift (z\u0026gt;4) quasars using the MMT and Keck observatories; (2) a detailed analysis of the ultraviolet and optical spectral behavior of 22 Narrow Line Seyfert 1 (NLS1) galaxies based on archival Hubble Space Telescope (HST) spectra; (3) an in-depth investigation of the proposed link between NLS1s and z\u0026gt;4 quasars, by means of comparison of composite spectra, and a Principal Component Analysis; (4) a simulation of Seyferts\/quasars designed to explore the role of dust in modifying their observed spectral energy distribution; and (5) a sensitive search for accretion signatures in a large sample of nearby emission-line galaxy nuclei, employing a quantitative comparison of the nebular line flux ratios in small (HST) and large (ground-based) apertures.\u003c\/p\u003e\u003cdiv class=\"aw-variant-hidden-subtitle-div\" id=\"aw-variant-subtitle-9783844324778\"\u003e\u003ch3\u003eLinking the Power Sources of Emission-Line Galaxy Nuclei from the Highest to the Lowest Redshifts\u003c\/h3\u003e\u003c\/div\u003e","brand":"Autorenwelt Shop","offers":[{"title":"Softcover - 9783844324778","offer_id":39469960659037,"sku":"9783844324778","price":68.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0940\/0622\/files\/431732e9-2b9e-4219-9241-9b54f8902366.jpg?v=1765348671","url":"https:\/\/shop.autorenwelt.de\/products\/supermassive-black-hole-accretion-across-the-age-of-the-universe-von-anca-constantin","provider":"Autorenwelt Shop","version":"1.0","type":"link"}