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Imaging on a sphere with interferometers: The spherical wave harmonic transform

Tobia Carozzi (Institutionen för rymd- och geovetenskap, Onsala rymdobservatorium)
Monthly Notices of the Royal Astronomical Society: Letters (1745-3925). Vol. 451 (2015), 1, p. L6-L10.
[Artikel, refereegranskad vetenskaplig]

I present an exact and explicit solution to the scalar (Stokes flux intensity) radio interferometer imaging equation on a spherical surface which is valid also for non-coplanar interferometer configurations. This imaging equation is comparable to ω-term imaging algorithms, but by using a spherical rather than a Cartesian formulation this term has no special significance. The solution presented also allows direct identification of the scalar (spin 0 weighted) spherical harmonics on the sky. The method should be of interest for future multispacecraft interferometers, wide-field imaging with non-coplanar arrays, and cosmic microwave background spherical harmonic measurements using interferometers.

Nyckelord: Instrumentation: interferometers, Techniques: interferometric, Techniques: radar astronomy, Telescopes

Denna post skapades 2015-09-30. Senast ändrad 2015-11-02.
CPL Pubid: 223420


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Institutioner (Chalmers)

Institutionen för rymd- och geovetenskap, Onsala rymdobservatorium


Astronomi, astrofysik och kosmologi

Chalmers infrastruktur