Results 31 to 40 of about 81,623 (245)
Autosomal Dominant Leukodystrophy: A Disease of the Nuclear Lamina
Frontiers in Cell and Developmental Biology, 2019 The nuclear lamina is a fibrous meshwork of proteins found adjacent to the inner nuclear membrane that plays a critical role in the maintenance of nuclear architecture.
Quasar S. Padiath
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Science, 1986 In the quarter century since the first optical identification of a "radio star" (3C 48), astronomers have come to general agreement that the underlying quasar energy source is accretion onto a massive black hole. There is much less agreement on the detailed physics of the processes by which this energy is converted to the forms observed, but this has ...
Trimble, Virginia, Woltjer, Lodewijk
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Quasars Probing Quasars. I. Optically Thick Absorbers near Luminous Quasars [PDF]
The Astrophysical Journal, 2006 With close pairs of quasars at different redshifts, a background quasar sightline can be used to study a foreground quasar's environment in absorption. We search 149 moderate resolution background quasar spectra, from Gemini, Keck, the MMT, and the SDSS to survey Lyman Limit Systems (LLSs) and Damped Ly-alpha systems (DLAs) in the vicinity of 1.8 < ...
Scott Burles +13 more
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Circum-Galactic Medium in the Halo of Quasars
Frontiers in Astronomy and Space Sciences, 2017 The properties of circum-galactic gas in the halo of quasar host galaxies are investigated analyzing Mg II 2800 and C IV 1540 absorption-line systems along the line of sight close to quasars.
Riccardo Ottolina +6 more
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Publications of the Astronomical Society of Australia, 2001 AbstractMicrolens-induced variability in multiple quasars can be used to study two cosmological issues of great interest, the size and brightness profile of quasars on one hand, and the distribution of compact (dark) matter along the line of sight on the other. Here a summary is given of recent theoretical progress as well as observational evidence for
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On Quasar Masses and Quasar Host Galaxies [PDF]
The Astrophysical Journal, 1998 Accepted for publication in ApJ Letters, 7 pages, aas2pp4 ...
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Construction Tender Subcontract Selection using Case-based Reasoning
Construction Economics and Building, 2012 Obtaining competitive quotations from suitably qualified subcontractors at tender tim n significantly increase the chance of w1nmng a construction project.
Due Luu, Wily Sher
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A Thirty-Four Billion Solar Mass Black Hole in SMSS J2157-3602, the Most Luminous Known Quasar [PDF]
, 2020 From near-infrared spectroscopic measurements of the MgII emission line doublet, we estimate the black hole (BH) mass of the quasar, SMSS J215728.21-360215.1, as being (3.4 +/- 0.6) x 10^10 M_sun and refine the redshift of the quasar to be z=4.692.
Bian, Fuyan +5 more
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Model simulation of heavy metals in river systems: case study the Negro river basin
Revista Facultad de Ingeniería Universidad de Antioquia, 2019 Este trabajo describe la aplicación de un modelo de calidad de agua para la simulación de metales pesados en sistemas fluviales. La estrategia propuesta incluye un enfoque de modelación 1D con la extensión del modelo QUASAR-ADZ para la representación del
Carlos Alberto Palacio-Tobón +3 more
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Cosmology With Quasars: Predictions for eROSITA From a Quasar Hubble Diagram
Frontiers in Astronomy and Space Sciences, 2020 The effort for understanding the matter and energy content of the Universe and its evolution relies on different probes, such as cosmic background radiation, cluster lensing, supernovae.
Elisabeta Lusso, Elisabeta Lusso
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