SIMBAD references

2022MNRAS.516..907S - Mon. Not. R. Astron. Soc., 516, 907-923 (2022/October-2)

Three-dimensional structure of the central molecular zone.


Abstract (from CDS):

A detailed comparison of H I and CO line cube data of the Galactic Centre (GC) region from the archives is obtained. The central molecular zone (CMZ) is shown to be embedded in the H I disc (central H I zone, CHZ) of radius ∼320 pc and vertical scale height ∼70 pc. A radio continuum belt is shown to run parallel to molecular Arms I and II. The belt draws a double infinity (∞∞) on the sky, connecting Sgr E (l ∼ -1${_{.}^{\circ}}$2), C, B1, B2, and Sgr D (+1${_{.}^{\circ}}$2), and is interpreted as a warping star-forming ring. The molecular Arms are closely associated with the H I arms on the longitude-velocity diagram (LVD), showing coherent rigid-body ridges. Due to the close relationship between H I and CO, the H I line absorption can be used to determine the Arms' position relative to Sgr A, B1, B2, and C. Combining the trigonometric data of proper motions of Sgr A* and maser sources of Sgr B2 as well as radial velocities, the 3D velocity vector of Sgr B2 is determined. From these analyses, the molecular Arm I with Sgr B2 is shown to be located in the near side of Sgr A*, and Arm II with Sgr C in the other side, both composing a pair of symmetrical Arms around the GC. We present a possible 3D view of Sgr A through E and Arms I and II along with a parameter list.

Abstract Copyright: © 2022 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society

Journal keyword(s): ISM: atoms - ISM: molecules - Galaxy: centre - Galaxy: structure - radio lines: ISM

CDS comments: SNR G1.0-0.2 is SNR G000.1-00.2 in SIMBAD.

Simbad objects: 17

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