搜索结果: 1-15 共查到“天文学 polarization”相关记录26条 . 查询时间(0.296 秒)
LINEAR POLARIZATION AND TOTAL FLUX DENSITY OF SILICON MONOXIDE MASERS AND ACTIVE EXTRAGALACTIC OBJECTS AT MILLIMETER WAVELENGTHS
Millimeter-wave wireless resources Linear polarization Radio astronomy observatory telescope Maser The Milky Way
2014/12/10
In order to investigate the linear polarization properties of millimeter-wave radio sources, a polarimeter was constructed for use on the Five College Radio Astronomy Observatory 14m telescope. Linear...
POLARBEAR seeks cosmic answers in microwave polarization（图）
microwave polarization POLARBEAR
2014/12/1
An international team of physicists has measured a subtle characteristic in the polarization of the cosmic microwave background radiation that will allow them to map the large-scale structure of the u...
The properties and polarization of the H2O and CH3OH maser environment of NGC7538-IRS1
Stars: formation - masers: water, methanol - polarization - magnetic fi elds - ISM: individual: NGC7538
2011/10/17
NGC7538 is a complex massive star-forming region. The region is composed of several radio continuum sources, one of which is IRS1, a high-mass protostar, from which a 0.3 pc molecular bipolar outflow ...
Adaptive optics assisted near-infrared polarization measurements of sources in the Galactic Center
Galaxy: center - Polarization - dust, extinction - Infrared: stars
2011/10/11
The goals of this work are to provide NIR polarimetry of the stellar sources in the central pc at the resolution of an 8m telescope for the first time, along with new insights into the nature of the k...
Near-infrared Linear Polarization of Ultracool Dwarfs
Near-infrared Linear Polarization tracool Dwarfs
2011/10/8
We report on near-infrared J- and H-band linear polarimetric photometry of eight ultracool dwarfs (two late-M, five L0-L7.5, and one T2.5) with known evidence for photometric variability due to dust c...
A Sino-German $λ$6\ cm polarization survey of the Galactic plane VI. Discovery of supernova remnants G178.2-4.2 and G25.1-2.3
supernova remnants – ISM: individual objects: G178.2− 4.2, G25.1− 2.3 – Radio continuum: ISM
2011/9/27
Supernova remnants (SNRs) were often discovered in radio surveys of the Galactic plane. Because of the surface-brightness limit of previous surveys, more faint or confused SNRs await discovery. The Si...
Analysis of Seeing-Induced Polarization Cross-Talk and Modulation Scheme Performance
Analysis Seeing-Induced Polarization Cross-Talk Modulation Scheme Performance
2011/9/27
We analyze the generation of polarization cross-talk in Stokes polarimeters by atmospheric seeing, and its effects on the noise statistics of spectropolarimetric measurements for both single-beam and ...
The instrumental polarization of the Nasmyth focus polarimetric differential imager NAOS/CONICA (NACO) at the VLT - Implications for time-resolved polarimetric measurements of Sgr A*
the Nasmyth focus polarimetric differential imager NAOS/CONICA (NACO)
2011/1/10
We report on the results of calibrating and simulating the instrumental polarization properties of the ESO VLT adaptive optics camera system NAOS/CONICA (NACO) in the Ks-band. We use the Stokes/Muelle...
Macroscopic Geo-Magnetic Radiation Model; Polarization effects and finite volume calculations
Macroscopic Geo-Magnetic Radiation Model Polarization effects finite volume calculations
2011/1/11
An ultra-high-energy cosmic ray (UHECR) colliding with the Earth's atmosphere gives rise to an Extensive Air Shower (EAS). Due to different charge separation mechanisms within the thin shower front co...
The new generation CMB B-mode polarization experiment: POLARBEAR
new generation CMB B-mode polarization experiment
2010/11/10
We describe the Cosmic Microwave Background (CMB) polarization experiment called Po-larbear. This experiment will use the dedicated Huan Tran Telescope equipped with a powerful 1,200-bolometer array r...
Constraints on the Polarization of the Anomalous Microwave Emission in the Perseus Molecular Complex from 7-year WMAP data
diffuse radiation radiation mechanisms general – radio continuum ISM
2010/11/11
We have used the seven year Wilkinson Microwave Anisotropy Probe (WMAP) data in order to update
the measurements of the intensity signal in the G159.6-18.5 region within the Perseus Molecular
Comple...
Origin of Molecular Outflow Determined from Thermal Dust Polarization
formation ISM jets and outflows magnetic fields polarization methods numerical
2010/11/9
The observational expectation of polarization measurements of thermal dust ra-diation is investigated to find information on molecular outflows based on magne-tohydrodynamical (MHD) and radiation tran...
Stokes tomography of radio pulsar magnetospheres. I. Linear polarization
Solar and Stellar Astrophysics (astro-ph.SR)
2011/1/4
Polarimetric studies of pulsar radio emission traditionally concentrate on how the Stokes vector (I, Q, U, V) varies with pulse longitude, with special emphasis on the position angle (PA) swing of the...
An uncombed inversion of multi-wavelength observations reproducing the Net Circular Polarization in a sunspots' penumbra
Solar and Stellar Astrophysics (astro-ph.SR)
2010/12/28
I derived a geometrical model of the penumbral magnetic field topology from an uncombed inversion setup that aimed at reproducing the NCP of simultaneous spectra in near-IR (1.56 mu) and VIS (630 nm) ...
Improved Dark Energy Detection through the Polarization-assisted WMAP-NVSS ISW Correlation
Cosmology and Extragalactic Astrophysics (astro-ph.CO)
2010/12/23
Integrated Sachs-Wolfe (ISW) effect can be estimated by cross-correlating Cosmic Microwave Background (CMB) sky with tracers of the local matter distribution.