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New Gravitational Lens Found.
As a result of spectral observations using the SAO RAS' BTA, a new
gravitational lens has been found (the Space Horseshoe), including
a gigantic central galaxy with a redshift of z=0.44 and a lensed image
of a more distant galaxy with vigorous star formation, located at z=2.38.
Though more than a hundred gravitational lenses are presently known of,
the discovered object has a number of unique characteristics: the
diameter of a lensed image (the Einstein ring) is 10", and the
amplification ratio of the galaxy luminosity due to gravitational
lensing is more than 35.
Intergalactic Meteorite Particle Discovery.
A spectrum of a small meteor with the speed of entry into the Earth's
atmosphere of ~300 km/s was registered using the 6m telescope. The size
of the meteorite particle was tenths of millimeter, which coincides with
the sizes of the chondrules in the carbon chondrites and is two orders
larger than typical sizes of interstellar dust.
Meteor's trajectory radiant coincides with the apex position of the
Solar system's movement to the centroid of the Local Group. Observations
of small sporadic meteors on the FAVOR wide-angle television CCD camera
confirmed a radiant with the significance level exceeding 96%. It was
concluded that presumably this meteor particle has an extragalactic origin.
Stellar-wind Envelope of Massive Supernova Progenitor Star
XRF060218/SN2006aj.
In the early spectra of the supernova SN2006aj related to the gamma-ray
burst GRB060218, H-alpha hydrogen lines with velocities of 28000km/s and
24000km/s were found, which points to the existence of a stellar-wind
envelope in the vicinity of the progenitor star. Such envelope is formed as
a result of massive star's evolution and was observed during the burst as a
powerful thermal component in its X-ray spectrum.
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