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New method may resolve difficulty in measuring universe's expansion（图）
New method difficulty measuring universe
2019/10/23
Astronomers using National Science Foundation radio telescopes have demonstrated how a combination of gravitational-wave and radio observations, along with theoretical modeling, can turn the mergers o...
New insights into galaxy structure from galphat– I. Motivation, methodology and benchmarks for Sérsic models
new galaxy image decomposition tool galphat
2014/12/20
We introduce a new galaxy image decomposition tool, galphat (GALaxy PHotometric ATtributes), which is a front-end application of the Bayesian Inference Engine (bie), a parallel Markov chain Monte Carl...
PSR J0007+7303 in the CTA1 SNR: New Gamma-ray Results from Two Years of Fermi-LAT Observations
CTA1 SNR:Gamma-ray Results Fermi-LAT Observations
2011/10/12
One of the main results of the Fermi Gamma-Ray Space Telescope is the discovery of {\gamma}-ray selected pulsars. The high magnetic field pulsar, PSR J0007+7303 in CTA1, was the first ever to be disco...
The origin of RXJ1856.5-3754 and RXJ0720.4-3125 -- updated using new parallax measurements
stars: kinematics – pulsars: individual: RXJ1856.5-3754 – pulsars: individual
2011/9/29
RXJ1856 and RXJ0720 are the only young isolated radio-quiet neutron stars (NSs) for which trigonometric parallaxes were measured. Due to detection of their thermal emission in X-rays they are importan...
An All Sky Extrasolar Planet Survey with new generation multiple object Doppler instruments at Sloan telescope
Sky Extrasolar Planet Doppler instruments Sloan telescope
2009/6/30
An All Sky Extrasolar Planet Survey with new generation multiple object Doppler instruments at Sloan telescope。
A New Approach in Data Reduction：Proper Handling of Random Errors and Image Distortions
METHODS ANALYTICAL METHODS STATISTICAL Image Distortions
2009/6/11
A New Approach in Data Reduction：Proper Handling of Random Errors and Image Distortions。
In this paper are presented recalculated elliptical and Thiel-Innes
orbitatal elements for the followingdouble stars:WDS05255-0033,WDS12272+2701,
WDS 13336+2944 and WDS 21031+0132 (two versions). Th...
In this paper are presented recalculated elliptical and Thiel-Innes
orbitatal elements for the followingdouble stars:WDS05255-0033,WDS12272+2701,
WDS 13336+2944 and WDS 21031+0132 (two versions). Th...