Searching for the Physical Drivers of the Eigenvector 1 Correlation Space
نویسندگان
چکیده
منابع مشابه
Searching For the Physical Drivers of Eigenvector 1: Influence of Black Hole Mass and Eddington Ratio
We compute the virial mass of the central black hole (M) and the luminosity-to-mass (L/M) ratio of ≈ 300 low-z quasars and luminous Seyfert 1 nuclei. We analyze: (1) whether radio-quiet and radio-loud objects show systematic differences in terms of M and L/M; (2) the influence of M and L/M on the shape of the Hβ broad component line profile; (3) the significance of the so-called “blue outliers”...
متن کاملSearching for the Physical Drivers of Eigenvector 1: from Quasars to Nano-quasars
We point out an analogy between two accreting white dwarfs with jets (CH Cyg and MWC 560) and powerful quasars. In spite of the enormous difference in the mass of the central object (a factor ∼10), the emission lines are strikingly similar to those of I Zw 1 (the prototype “Narrow Line Seyfert 1” nucleus whose spectrum is widely used as an FeII template for almost all quasars). The spectral sim...
متن کاملstudy of cohesive devices in the textbook of english for the students of apsychology by rastegarpour
this study investigates the cohesive devices used in the textbook of english for the students of psychology. the research questions and hypotheses in the present study are based on what frequency and distribution of grammatical and lexical cohesive devices are. then, to answer the questions all grammatical and lexical cohesive devices in reading comprehension passages from 6 units of 21units th...
the use of appropriate madm model for ranking the vendors of mci equipments using fuzzy approach
abstract nowadays, the science of decision making has been paid to more attention due to the complexity of the problems of suppliers selection. as known, one of the efficient tools in economic and human resources development is the extension of communication networks in developing countries. so, the proper selection of suppliers of tc equipments is of concern very much. in this study, a ...
15 صفحه اولEigenvector 1: An Optimal Correlation Space for Active Galactic Nuclei.
We identify a correlation space involving optical and UV emission-line parameters as well as the soft X-ray spectral index that provides optimal discrimination between all principal classes of active galactic nuclei (AGNs). Most of the sources in our three high-quality data samples show a strong intercorrelation with narrow-line Seyfert 1 (NLSy1) galaxies and steep-spectrum radio galaxies occup...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2001
ISSN: 0004-637X,1538-4357
DOI: 10.1086/322286