منابع مشابه
On Quasar Masses and Quasar Host Galaxies
The mass of massive black holes in quasar cores can be deduced using the typical velocities of Hβ-emitting clouds in the Broad Line Region (BLR) and the size of this region. However, this estimate depends on various assumptions and is susceptible to large systematic errors. The Hβ-deduced black hole mass in a sample of 14 bright quasars is found here to correlate with the quasar host galaxy lum...
متن کاملTwo Close–Separation Quasar–Quasar Pairs in the Large Bright Quasar Survey
We present photometric and spectroscopic observations of two close quasar– quasar pairs found in the Large Bright Quasar Survey (LBQS) (Hewett et al. 1995, AJ, 109, 1498). The two components of the 2153-2056 pair (z = 1.845, ∆θ = 7. 8, B = 17.9 and 21.3) have the same redshifts within the relatively large uncertainty, ∆vA−B = −1100±1500 km s, of the observations. The quasars are most likely spa...
متن کاملLoud Quasar Lobe Dominated Radio Loud Quasar Radio Galaxy Broad
In this second paper, in a series of two, we determine the properties of the stellar torus that we showed in the first paper to result as a product of two merging black holes. If the surrounding stellar cluster is as massive as the binary black hole, the torque acting on the stars ejects a fraction which extracts the binary’s angular momentum. After the black holes coalesced on scales of ∼ 10 y...
متن کاملQuasar Absorption Lines as a Function of Quasar Orientation Measures
We present high resolution radio data at 3.5 and 20 cm from the VLA in the A configuration for 144 quasars with known C IV absorption line properties. Using these measurements, we compare and contrast a number of quasar orientation indicators. These quantities are used to study the velocity distribution of C IV absorption lines as a function of quasar orientation measures. That there is an exce...
متن کاملQuasar Microlensing at High Magnification and the Role of Dark Matter: Enhanced Fluctuations and Suppressed Saddlepoints
Contrary to naive expectation, diluting the stellar component of the lensing galaxy in a highly magnified system with smoothly distributed “dark” matter increases rather than decreases the microlensing fluctuations caused by the remaining stars. For a bright pair of images straddling a critical curve, the saddlepoint (of the arrival time surface) is much more strongly affected than the associat...
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ژورنال
عنوان ژورنال: Nature
سال: 1989
ISSN: 0028-0836,1476-4687
DOI: 10.1038/338212a0