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and neutron stars may explain the creation of transient supernovae explosions that tend to occur far away from host galaxies. ur paper examines so-called calcium-rich transientssays Joseph Lyman from the University of Warwick. hese are luminous explosions
when two neutron stars collide or when a neutron star merges with a black hole. Although mergers between neutron stars and black holes would not explain these brighter calcium-rich transients the researchers considered that
if the collision was instead between a white dwarf star and neutron star it would fit their observations because:
hat we therefore propose is these are systems that have been ejected from their galaxy. A good candidate in this scenario is a white dwarf and a neutron star in a binary system.
The neutron star is formed when a massive star goes supernova. The mechanism of the supernova explosion causes the neutron star to be kicked to very high velocities (100s of km/s). This high velocity system can then escape its galaxy
and if the binary system survives the kick the white dwarf and neutron star will merge causing the explosive transient. he researchers who say such merging systems of white dwarfs
and neutron stars may produce high energy gamma-ray bursts will next look for any new examples of calcium-rich transients to confirm this.
Such merging systems will contribute significant sources of gravitational waves potentially detectable by upcoming experiments that will shed further light on the nature of these exotic systems.
Researchers from University of Leicester and the Lund University Observatory contributed to the work. Source:
University of Warwickyou are free to share this article under the Creative Commons Attribution-Noderivs 3. 0 Unported license n
#8th-century tree rings hint at close-range space blast A blast of radiation that hit Earth circa AD 770 may have been caused not by a solar flare but by the energetic debris from the collision of two nearby neutron stars.
and thought to be caused by the collision of two neutron stars black holes or white dwarfs. The pair suggest that the odd isotope levels in the trees
They suggest looking for a neutron star between 3000 and 12000 light years away left over from such a merger.
#NASA Chandra captures x-ray echoes pinpointing distant neutron star Astronomers using NASA Chandra X-ray Observatory have discovered the largest and brightest set of rings from X-ray light echoes ever observed.
These extraordinary rings, produced by an intense flare from a neutron star, provide astronomers a rare chance to determine how far across the Milky way galaxy the star is from Earth.
a double star system in the plane of our galaxy containing a neutron star, the dense remnant of a massive star pulverized in a supernova explosion.
The neutron star is in orbit with another massive star and is shrouded by thick clouds of interstellar gas and dust.
This behavior is something astronomers generally see more often in systems containing black holes than in systems like Circinus X-1 that contain a neutron star.
This extreme velocity is associated usually with jets produced by a black hole. ircinus X-1 acts in some ways like a neutron star
and form neutron stars, the final stage of collapse before some go on to make black holes.''In that environment, it quite possible that pentaquarks are formed,
when stars collapse into neutron stars or potentially black holesnfluencing what they look like and where they go in their life cycle.
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