A new approach to multi-frequency synthesis in radio interferometry

Autor:	Junklewitz, H., Bell, M. A., Enßlin, T.
Rok vydání:	2014
Předmět:	Astrophysics - Instrumentation and Methods for Astrophysics
Druh dokumentu:	Working Paper
DOI:	10.1051/0004-6361/201423465
Popis:	We present a new approach to multi-frequency synthesis in radio astronomy. Using Bayesian inference techniques, the new technique estimates the sky brightness and the spectral index simultaneously. In principle, the bandwidth of a wide-band observation can be fully exploited for sensitivity and resolution, currently only limited by higher order effects like spectral curvature. Employing this new approach, we further present a multi-frequency extension to the imaging algorithm RESOLVE. In simulations, this new algorithm outperforms current multi-frequency imaging techniques like MS-MF-CLEAN. Comment: 13 pages, 5 fugures, submitted to Astronomy and Astrophysics
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1401.4711 Zobrazit plný text záznamu View this record from Arxiv