搜索结果: 16-30 共查到“知识库 实测天体物理学”相关记录224条 . 查询时间(2.18 秒)
Non-thermal radiation from a runaway massive star
thermal radiation runaway massive star
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2010/11/15
We present a study of the radio emission from a massive runaway star. The star forms a bow shock that is clearly observed in the infrared. We have performed VLA observations under the assumption that ...
Dark Energy as Double N-Flation--Observational Predictions
Dark Energy as Double N-Flation--Observational Predictions
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2010/11/15
We propose a simple model for dark energy useful for comparison with observations. This is based on the idea that dark energy and inflation should be caused by exactly the same physical process.
1.3 mm Wavelength VLBI of Sagittarius A*: Detection of Time-Variable Emission on Event Horizon Scales
Galaxy center — submillimeter general — techniques high angular resolution — techniques
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2010/11/15
Sagittarius A*, the 4 × 106 M⊙ black hole candidate at the Galactic Center, can be studied on Schwarzschild radius scales with (sub)millimeter wavelength Very Long Baseline Interferometry (VLBI). We...
HST SpectralObservations near the He II Ly-alpha Break: Implications for He II Reionization
galaxies active intergalactic medium quasars general ultraviolet galaxies
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2010/11/12
Quasars that allow the study of IGM He II are very rare, since they must be at high redshift along sightlines free of substantial hydrogen absorption, but recent work has dramatically expanded the num...
Intermediate-mass-ratio-inspirals in the Einstein Telescope. II. Parameter estimation errors
Intermediate-mass-ratio-inspirals Einstein Telescope Parameter estimation errors
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2010/11/16
We explore the precision with which the Einstein Telescope (ET) will be able to measure the
parameters of intermediate–mass–ratio inspirals (IMRIs), i.e., the inspirals of stellar mass compact object...
Precise Estimates of the Physical Parameters for the Exoplanet System HD-17156 Enabled by HST FGS Transit and Asteroseismic Observations
stars planetary systems — stars oscillations — stars
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2010/11/9
We present observations of three distinct transits of HD 17156b obtained with the Fine Guidance Sensors (FGS) on board the Hubble Space Telescope (HST)5.
The First Galaxies: Assembly of Disks and Prospects for Direct Detection
cosmology observations galaxies formation galaxies
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2010/11/9
The James Webb Space Telescope (JWST) will enable observations of galaxies at redshifts z & 10 and hence allow to test our current understanding of structure formation at very early times. Previous wo...
Polarised foreground removal at low radio frequencies using rotation measure synthesis: Uncovering the signature of hydrogen reionisation
cosmology observation cosmology theory di use radiation nstrumentation:
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2010/11/12
Measurement of redshifted 21-cm emission from neutral hydrogen promises to be the most e ective method for studying the reionisation history of hydrogen and,indirectly, the rst galaxies. These studie...
Thin shell morphology in the circumstellar medium of massive binaries
Hydrodynamics – Stars binaries general – Stars circumstellar matter – Stars massive – Stars winds outflows
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2010/11/11
Context. In massive binaries, the powerful stellar winds of the two stars collide, leading to the formation of shock-dominated environments that can be modelled only in 3D.
Asteroseismology of the Transiting Exoplanet Host HD 17156 with HST FGS
planetary systems stars oscillations stars individual techniques
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2010/11/9
Observations conducted with the Fine Guidance Sensor on Hubble Space Telescope (HST) providing
high cadence and precision time-series photometry were obtained over 10 consecutive days in December 200...
Probing the faint end of the quasar luminosity function at z ~ 4 in the COSMOS field
cosmology observations — quasars general — surveys
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2010/11/12
We searched for quasars that are 3 mag fainter than the SDSS quasars in the redshift range 3.7 . z . 4.7 in the COSMOS field to constrain the faint end of the quasar luminosity function.
Dynamos in Stellar Convection Zones: of Wreaths and Cycles
Dynamos Stellar Convection Zones Wreaths and Cycles
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2010/11/15
We live near a magnetic star whose cycles of activity are driven by dynamo action beneath the surface. In the solar convection zone, rotation couples with plasma motions to build
highly organized mag...
Masking a singularity with k-essence fields in an emergent gravity metric
emergent gravity metric
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2010/11/16
It is known that dynamical solutions of the k-essence equation of motion change the metric for
the perturbations around these solutions and the perturbations propagate in an emergent spacetime with m...
The First Ultra-Cool Brown Dwarf Discovered by the Wide-field Infrared Survey Explorer
(stars:) brown dwarfs (Galaxy:)solar neighborhood infrared
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2010/11/12
We report the discovery of the first new ultra-cool brown dwarf found with the Wide-field Infrared Survey Explorer (WISE). The object’s preliminary designation is WISEPC J045853.90+643451.
Inflationary observables in loop quantum cosmology
Cosmology of Theories beyond the SM Loop quantum gravity and cosmology
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2010/11/16
The full set of cosmological observables coming from linear scalar and tensor perturbations of loop quantum cosmology is computed in the presence of inverse-volume corrections.