SIMBAD references

2016MNRAS.462.1382B - Mon. Not. R. Astron. Soc., 462, 1382-1392 (2016/October-3)

Asymmetric structure in Sgr A* at 3 mm from closure phase measurements with VLBA, GBT and LMT.

BRINKERINK C.D., MUELLER C., FALCKE H., BOWER G.C., KRICHBAUM T.P., CASTILLO E., DELLER A.T., DOELEMAN S.S., FRAGA-ENCINAS R., GODDI C., HERNANDEZ-GOMEZ A., HUGHES D.H., KRAMER M., LEON-TAVARES J., LOINARD L., MONTANA A., MOSCIBRODZKA M., ORTIZ-LEON G.N., SANCHEZ-ARGUELLES D., TILANUS R.P.J., WILSON G.W. and ZENSUS J.A.

Abstract (from CDS):

We present the results of a closure phase analysis of 3 mm very long baseline interferometry measurements performed on Sagittarius A* (Sgr A*). We have analysed observations made in 2015 May using the Very Long Baseline Array, the Robert C. Byrd Green Bank Telescope and the Large Millimeter Telescope Alfonso Serrano and obtained non-zero closure phase measurements on several station triangles - indicative of a non-point-symmetric source structure. The data are fitted with an asymmetric source structure model in Sgr A*, represented by a simple two-component model, which favours a fainter component due east of the main source. This result is discussed in light of a scattering screen with substructure or an intrinsically asymmetric source.

Abstract Copyright: © 2016 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): accretion, accretion discs - techniques: interferometric - galaxies: active - galaxies: jets - radio continuum: galaxies - radio continuum: galaxies

Simbad objects: 4

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