Herschel water maps towards the vicinity of the black hole Sgr A

Abstract:

Aims. We study the spatial distribution and kinematics of water emission in a~ 8× 8 pc 2 region of the Galactic center (GC) that covers the main molecular features around the supermassive black hole Sagittarius A*(Sgr A*). We also analyze the water excitation to derive the physical conditions and water abundances in the circumnuclear disk (CND) and the “quiescent clouds”. Methods. We presented the integrated line intensity maps of the ortho 1 10− 1 01, and para 2 02− 1 11 and 1 11− 0 00 water transitions observed using the On the Fly mapping mode with the Heterodyne Instrument for the Far Infrared (HIFI) on board Herschel. To study the water excitation, we used HIFI observations of the ground state ortho and para HO transitions toward three selected positions in the vicinity of Sgr A*. In our study, we also used dust continuum measurements of the CND, obtained with the Spectral and Photometric Imaging …

Año de publicación:

2019

Keywords:

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