نتایج جستجو برای: polarized continuum model

تعداد نتایج: 2165174  

2006
C. Martin Gaskell

A model of wavelength-dependent lags in optical continuum variability of AGNs is proposed which avoids the problems of the popular " lamppost " model. Rather than being due to reprocessing of high-energy radiation from a hypothetical source above the accretion disk, the wavelength-dependent delays observed from the B to I bands are instead due to contamination of an intrinsically coherently var...

2000
B. M. GAENSLER JOHN M. DICKEY N. M. MCCLURE-GRIFFITHS A. J. GREEN M. H. WIERINGA R. F. HAYNES

The Southern Galactic Plane Survey (SGPS) is an H I and 1.4-GHz continuum survey of the 4th quadrant of the Galaxy at arcmin resolution. We present here results on linearly polarized continuum emission from an initial 28-square-degree Test Region for the SGPS, consisting of 190 mosaiced pointings of the Australia Telescope Compact Array, and covering the range 325.5< l < 332.5, −0.5< b< +3.5. C...

1997
E. Oliva A. Marconi A. Cimatti

High quality 4500–6800 Å spectropolarimetric observations of the Circinus galaxy are reported. These show polarized and relatively broad (FWHM∼3300 km/s) Hα (as well as marginal Hβ) arising from a <3′′ (<60 pc) region centered on the nucleus and coincident with the the peak of the narrow line region. Broad Hα might also be present ∼8′′ (160 pc) SE from the nucleus and close to the dust lane, bu...

1998
S. Shelah

The main result is that for λ strong limit singular failing the continuum hypothesis (i.e. 2 > λ+), a polarized partition theorem holds.

Journal: :Physical review. B, Condensed matter 1996
Manfra Aifer Goldberg Broido Pfeiffer West

The absolute spin polarization of a two-dimensional electron gas has been measured as a function of temperature at the ν = 1 quantum Hall state by magnetoabsorption spectroscopy. We find that the electrons become fully polarized as T → 0 and that the loss of spin polarization over the temperature regime of 500mK to 12K is consistent with a recently proposed continuum quantum ferromagnet model o...

2013
Casper Steinmann Kristoffer L. Blædel Anders S. Christensen Jan H. Jensen

An interface between semi-empirical methods and the polarized continuum model (PCM) of solvation successfully implemented into GAMESS following the approach by Chudinov et al (Chem. Phys. 1992, 160, 41). The interface includes energy gradients and is parallelized. For large molecules such as ubiquitin a reasonable speedup (up to a factor of six) is observed for up to 16 cores. The SCF convergen...

1998
Brian R. McNamara Craig L. Sarazin

We have obtained U-band polarimetry of the spatially extended, blue optical continuum associated with the FR I radio source PKS 2322−122. PKS 2322−122 is located in the Abell 2597 cluster central galaxy. We find a three sigma upper limit to the degree of polarization of the optical continuum of less than 6%. The accuracy of the measurement is limited primarily by our ability to measure the amou...

2009
Stefano Bianchi

The soft X-ray emission in obscured active galactic nuclei (AGN) is dominated by emission lines, produced in a gas photoionized by the nuclear continuum and likely spatially coincident with the optical narrow line region (NLR). However, a fraction of the observed soft X-ray flux appears like a featureless power law continuum. If the continuum underlying the soft X-ray emission lines is due to T...

1998
Brian R. McNamara Craig L. Sarazin Richard Elston Michael Wise

We have obtained U-band polarimetry of the spatially extended, blue optical continuum associated with the FR I radio source PKS 2322−122. PKS 2322−122 is located in the Abell 2597 cluster central galaxy. We find a three sigma upper limit to the degree of polarization of the optical continuum of less than 6%. The accuracy of the measurement is limited primarily by our ability to measure the amou...

2003
Paul S. Smith Gary D. Schmidt Dean C. Hines Craig B. Foltz

Highly polarized QSOs discovered in the Two-Micron All Sky Survey (2MASS) have been observed to determine the source(s) of optical polarization in this near-infrared color-selected sample. Broad emission lines are observed in the polarized flux spectra of most objects, and the polarization of the lines is at about the same level and position angle as the continuum. Generally, the continuum is b...

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