搜索结果: 1-15 共查到“天文学 distance”相关记录21条 . 查询时间(0.375 秒)
Precise Location,Distance Provide Breakthrough in Study of Fast Radio Bursts
Precise Location Distance Breakthrough Fast Radio Bursts
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2017/1/9
For the first time, astronomers have pinpointed the location in the sky of a Fast Radio Burst (FRB), allowing them to determine the distance and home galaxy of one of these mysterious pulses of radio ...
DISTANCE DETERMINATION TO THE CRAB-LIKE PULSAR WIND NEBULA G54.1+0.3 AND THE SEARCH FOR ITS SUPERNOVA REMNANT SHELL
supernova remnants molecules radio continuum
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2014/12/23
We discovered a large-scale shell G53.9+0.2 around the Crab-like pulsar wind nebula (PWN) G54.1+0.3 with 1420 MHz continuum Very Large Array observations. This is confirmed by a new infrared (IR) imag...
NOvA experiment sees first long-distance neutrinos（图）
NOvA long-distance neutrinos
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2014/3/20
Scientists on the world's longest-distance neutrino experiment announced today that they have seen their first neutrinos.
Measuring a cosmological distance-redshift relationship using only gravitational wave observations of binary neutron star coalescences
neutron stars gravitational waves cosmology
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2011/10/14
Detection of gravitational waves from the inspiral phase of binary neutron star coalescence will allow us to measure the effects of the tidal coupling in such systems. These effects will be measurable...
A More General Model for the Intrinsic Scatter in Type Ia Supernova Distance Moduli
General Model Intrinsic Scatter Supernova Distance Moduli
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2011/10/13
We describe a new formalism to fit the parameters $\alpha$ and $\beta$ that are used in the SALT2 model to determine the standard magnitudes of Type Ia supernovae. The new formalism describes the intr...
Distance determination for RAVE stars using stellar models III: The nature of the RAVE survey and Milky Way chemistry
Stars: distances, Stars: fundamental parameters, Galaxy: abundances, Galaxy: disk, Galaxy: stellar content, Galaxy: structure
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2011/9/29
We apply the method of Burnett & Binney (2010) for the determination of stellar distances and parameters to the internal catalogue of the Radial Velocity Experiment (Steinmetz et al. 2006). Subsamples...
Measuring the Earth-Sun distance during a lunar eclipse
Measuring Earth-Sun distance lunar eclipse
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2011/9/28
The classical method for measure the Earth-Sun distance is due to Aristarchus and it is based upon the measure of the angle Moon-Earth-Sun when the Moon is exactly in quadrature. Such an angle is only...
The orbit and distance of WR140
orbit distance of WR140
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2010/11/10
A campaign of 35 epochs of milli-arcsecond resolution VLBAobservations of the archetype collidingwind WR+O star binary system WR140 show the wind-collision region (WCR) as a bow-shaped arc of emission...
A Series Solution to the Luminosity Distance in a Flat LCDM Universe
Cosmological distances Numerical methods
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2010/11/15
Cosmological observations indicate that our universe is flat and dark energy (DE)
dominated at present. The luminosity distance plays an important role in the investigation
of the evolution and stru...
On the Distance and Age of the Pulsar Wind Nebula 3C58
the Distance the Pulsar Wind Nebula 3C58
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2011/1/10
There is a growing community of astronomers presenting evidence that the pulsar wind nebula 3C58 is much older than the connection with the historical supernova of A.D 1181 would indicate. Most of the...
Distance and time constraints on accelerating cosmological models
Cosmology and Extragalactic Astrophysics (astro-ph.CO) General Relativity and Quantum Cosmology (gr-qc) High Energy Physics - Phenomenology (hep-ph)
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2010/12/24
The absence of guidance from fundamental physics about the mechanism behind cosmic acceleration has given rise to a number of alternative cosmological scenarios.
THE PROXIMITIES OF ASTEROIDS AND CRITICAL POINTS OF THE DISTANCE FUNCTION
Celestial mechanics Minor planets asteroids
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2010/10/29
The proximities are important for di®erent purposes, for example to evaluate the risk of collisions of asteroids or comets with the Solar-System planets. We describe a simple and e±cient method fo...
Computational Developments for Distance Determination of Stellar Groups
Distance determination spectral type frequency function
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2010/9/15
In this paper, we consider a statistical method for distance determination of stellar groups. The method depends on the assumption that the members of the group scatter around a mean absolute magnitud...
Black hole hunters set new distance record（图）
Black hole hunters new distance record
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2010/1/28
Using the European Southern Observatory´s Very Large Telescope (VLT), astronomers from the University of Sheffield have detected a stellar mass black hole much farther away than any other previo...
The effect of pressure gradients on luminosity distance - redshift relations
pressure gradients luminosity distance redshift relations
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2010/3/18
Inhomogeneous cosmological models have had significant success in explaining cosmological observations without the need for dark energy. Generally, these models imply inhomogeneous matter distribution...