搜索结果: 1-15 共查到“天体物理学 imaging”相关记录20条 . 查询时间(0.093 秒)
MEM and CLEAN Imaging of VLBA Polarisation Observations of Compact Active Galactic Nuclei
CLEAN Imaging VLBA Polarisation Compact Active Galactic Nuclei
2011/10/10
The Maximum Entropy Method (MEM) for the deconvolution of radio interferometry images is mathematically well based and presents a number of advantages over the usual CLEAN deconvolution, such as appre...
Characteristics of Gamma-Ray Loud Blazars in the VLBA Imaging and Polarimetry Survey
Gamma-Ray Loud Blazars the VLBA Imaging
2011/1/11
The radio properties of blazars detected by the Large Area Telescope (LAT) on board the Fermi Gamma-ray Space Telescope have been observed as part of the VLBA Imaging and Polarimetry Survey (VIPS). Th...
Near-Infrared Imaging Survey of Faint Companions around Young Dwarfs in the Pleiades Cluster
Near-Infrared Imaging Survey Faint Companions around Young Dwarfs
2011/1/10
We conducted a near-infrared imaging survey of 11 young dwarfs in the Pleiades cluster using the Subaru Telescope and the near-infrared coronagraph imager. We found 10 faint point sources, with magnit...
MUSTANG High Angular Resolution Sunyaev-Zel'dovich Effect Imaging of Sub-Structure in Four Galaxy Clusters
MUSTANG High Angular Resolution Sunyaev-Zel'dovich Effect Imaging
2011/1/11
We present 10" to 18" images of four massive clusters of galaxies through the Sunyaev-Zel'dovich Effect (SZE). These measurements, made at 90~GHz with the MUSTANG receiver on the Green Bank Telescope ...
We present the first set of polarimetric images made with the GMRT. These were obtained as part of the program to commission the polarization mode at the telescope. We find that the instrumental polar...
Imaging "Pinwheel"nebulae with optical long-baseline interferometry
techniques high angular resolution – techniques interferometric – binaries close – stars
2010/11/16
Dusty Wolf-Rayet stars are few but remarkable in terms of dust production rates (up to ˙M = 10−6M⊙/yr). Infrared excesses associated to mass-loss are found in the sub-types WC8 and WC9. Few WC9d...
Hubble Space Telescope Imaging and Spectral Analysis of Two Brown Dwarf Binaries at the L Dwarf/T Dwarf Transition
binaries visual — stars individual stars
2010/11/10
We present a detailed examination of the brown dwarf multiples 2MASS J08503593+1057156 and
2MASS J17281150+3948593, both suspected of harboring components that straddle the L dwarf/T
dwarf transitio...
Imaging the circumstellar dust distribution around AGB stars
Imaging the circumstellar dust AGB stars
2010/11/12
Stellar light from an AGB star is scattered by the circumstellar dust and polarized in the direction perpendicular to the source. Therefore, images of circumstellar envelopes around AGB stars in polar...
High-spatial-resolution imaging of thermal emission from debris disks
circumstellar matter infrared stars – planetary systems
2010/11/11
We have obtained sub-arcsec mid-IR images of a sample of debris disks within 100 pc. For our sample of nineteen A-type debris disk candidates chosen for their IR excess, we have resolved, for the firs...
Dissecting the Moth: Discovery of an off-centered ring in the HD 61005 debris disk with high-resolution imaging
circumstellar matter — planetary systems protoplanetary disks — Techniques
2010/11/15
The debris disk known as “The Moth” is named after its unusually asymmetric surface brightness distribution. It is located around the ∼90Myr old G8V star HD 61005 at 34.5 pc and has previously b...
Pulsar timing arrays as imaging gravitational wave telescopes: angular resolution and source (de)confusion
Pulsar timing arrays imaging gravitational wave telescopes
2011/1/10
Pulsar timing arrays (PTAs) will be sensitive to a finite number of gravitational wave (GW) "point" sources (e.g. supermassive black hole binaries). N quiet pulsars with accurately known distances d_{...
Compressed sensing for wide-field radio interferometric imaging
Instrumentation and Methods for Astrophysics (astro-ph.IM)
2011/1/7
For the next generation of radio interferometric telescopes it is of paramount importance to incorporate wide field-of-view (WFOV) considerations in interferometric imaging, otherwise the fidelity of ...
Millimeter imaging of MWC 758: probing the disk structure and kinematics
Solar and Stellar Astrophysics (astro-ph.SR) Earth and Planetary Astrophysics (astro-ph.EP)
2011/1/5
We investigate the structure and kinematics of the circumstellar disk around the Herbig Ae star MWC 758 using high resolution observations of the 12CO (3-2) and dust continuum emission at the waveleng...
Spectral imaging of the Sagittarius B2 region in multiple 7-mm molecular lines
Galaxy Astrophysics (astro-ph.GA)
2010/12/29
We have undertaken a spectral-line imaging survey of a 6 x 6 arcmin^2 area around Sgr B2 near the centre of the Galaxy, in the range from 30 to 50 GHz, using the Mopra telescope. The spatial resolutio...
Calibration of the AKARI Far-Infrared Imaging Fourier Transform Spectrometer
Instrumentation and Methods for Astrophysics (astro-ph.IM)
2010/12/28
The Far-Infrared Surveyor (FIS) onboard the AKARI satellite has a spectroscopic capability provided by a Fourier transform spectrometer (FIS-FTS). FIS-FTS is the first space-borne imaging FTS dedicate...