搜索结果: 1-13 共查到“天文学 methods”相关记录13条 . 查询时间(0.239 秒)
A critical analysis of three near-infrared photometric methods of estimating distances to cataclysmic variables
Stars: novae cataclysmic variables Stars:distances parallaxes Stars:statistics
2011/10/13
A critical analysis of three methods of estimating distances to cataclysmic variables (CVs) is performed. These methods, by Ak et al., Beuermann, and Knigge, all use near-infrared (JHK or Ks) magnitud...
A comparison of preprocessing methods for solar force-free magnetic field extrapolation
preprocessing methods solar force-free magnetic field extrapolation
2011/1/13
Extrapolations of solar photospheric vector magnetograms into three-dimensional magnetic fields in the chromosphere and corona are usually done under the assumption that the fields are force-free. The...
Deep Near-Infrared Survey of the Pipe Nebula II: Data, Methods, and Dust Extinction Maps
ISM clouds – infrared ISM –stars formation
2010/11/11
We present a new set of high resolution dust extinction maps of the nearby and essentially
starless Pipe Nebula molecular cloud. The maps were constructed from a concerted deep nearinfrared imaging s...
Probing the parameter space of HD 49933: a comparison between global and local methods
comparison global local methods
2010/11/16
We present two independent methods for studying the global stellar parameter space (mass M, age, chemical composition X0, Z0) of HD 49933 with seismic data. Using a local minimization and an MCMC algo...
Accuracy and Limitations of Fitting and Stereoscopic Methods to Determine the Direction of Coronal Mass Ejections from Heliospheric Imagers Observations
Solar and Stellar Astrophysics (astro-ph.SR) Space Physics (physics.space-ph)
2010/12/28
Using data from the Heliospheric Imagers (HIs) onboard STEREO, it is possible to derive the direction of propagation of coronal mass ejections (CMEs) in addition to their speed with a variety of metho...
The Spin of the Black Hole Microquasar XTE J1550-564 via the Continuum-Fitting and Fe-Line Methods
High Energy Astrophysical Phenomena (astro-ph.HE)
2010/12/24
We measure the spin of XTE J1550-564 in two ways: by modelling the thermal continuum spectrum of the accretion disc, and independently by modeling the broad red wing of the reflection fluorescence Fe-...
Oxygen Abundance Methods in SDSS: View from Modern Statistics
Galaxies abundance starburst—stars formation
2010/9/15
Our purpose is to find which is the most reliable one among various oxygen abundance determination methods.We will test the validity of several different oxygen abundance determination methods using m...
Comment on "Bayesian evidence: can we beat MultiNest using traditional MCMC methods", by Rutger van Haasteren (arXiv:0911.2150)
data analysis methods statistical
2010/3/18
In arXiv:0911.2150, Rutger van Haasteren seeks to criticize the nested sampling algorithm for Bayesian data analysis in general and its MultiNest implementation in particular. He introduces a new meth...
Measurement of Double Stars with a CCD Camera：Two Methods。
Small-scale Magnetic Field Diagnostics outside Sunspots：Comparison of Different Methods
Sun magnetic fluxtubes kG magnetic fields
2009/5/12
We analyse different observational data related to the problem
of intrinsic magnetic field strength in small-scale fluxtubes outside
sunspots. We conclude that the kG range of fluxtube fields follow...
ACTIVE CLOSE BINARIES (CB) MODELS AND METHODS FOR INTERPRETATION OF PHOTOMETRIC OBSERVATIONS
CLOSE BINARIES PHOTOMETRIC OBSERVATIONS
2009/4/8
An essential progress in astrophysics and CB evolution theory
started about 1970 thanks to the development of computer models enabling synthesizing
of the light curves and those of line-of-sight vel...
COMPARISON OF THE SMOOTHING METHODS：PRELIMINARY RESULTS
SMOOTHING METHODS PRELIMINARY RESULTS
2009/4/3
COMPARISON OF THE SMOOTHING METHODS：PRELIMINARY RESULTS。
METHODS OF SMOOTHING APPLIED TO DIFFERENCES IN STAR POSITIONS IN OBSERVATIONAL CATALOGUES
Whittaker - Robinson - Vondrak double stars Elementary Trigonometric and Exponential
2009/3/26
Three different methods, Whittaker - Robinson - Vondrak (WRV),
cubic spline (SPL) and Expansion of the Elementary Trigonometric and Exponential
Functions (ETE), are applied to differences in star po...