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Global Lorentzian geometry from lightlike geodesics: What does an observer in (2+1)-gravity see?
lightlike geodesics (2+1)-gravity
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2010/3/19
We show how an observer could measure the non-local holonomy variables that parametrise the flat Lorentzian 3d manifolds arising as spacetimes in (2+1)-gravity. We consider an observer who emits light...
Polarized Line Profiles as Diagnostics of Circumstellar Geometry in Type IIn Supernovae
Polarized Line Profiles Type IIn Supernovae Circumstellar Geometry
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2009/6/30
Polarized Line Profiles as Diagnostics of Circumstellar Geometry in Type IIn Supernovae。
GEOMETRY OF LARGE RADIO LOOPS AT 1420 MHz
RADIO LOOPS 1420 MHz GEOMETRY
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2009/4/3
GEOMETRY OF LARGE RADIO LOOPS AT 1420 MHz。