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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
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
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)
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
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...
The effect of pressure gradients on luminosity distance - redshift relations
pressure gradients luminosity distance redshift relations
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...
On the distance to the bright nonthermal radio sources in the direction of an extraordinarily massive cluster of red supergiants
nonthermal radio sources extraordinarily massive cluster red supergiants
2009/6/30
On the distance to the bright nonthermal radio sources in the direction of an extraordinarily massive cluster of red supergiants。