Circumnuclear eccentric gas flow in the Galactic Center revealed by ALMA CMZ Exploration Survey (ACES)

Sofue, Y; Oka, T; Longmore, S; Walker, D; Ginsburg, A; Henshaw, JD; Bally, J; Barnes, AT; Battersby, C; Colzi, L; Ho, P; Jimenez-Serra, I; Kruijssen, JMD; Mills, E; Petkova, MA; Sormani, MC; Wallace, J; Armijos-Abendaño, J; Dutkowska, KM; Enokiya, R; García, P; Gramze, S; Henkel, C; Hsieh, P-Y; Hu, Y; Immer, K; Iwata, Y; Karoly, J; Klessen, RS; Kohno, K; Krumholz, MR; Lipman, D; Morris, MR; Nogueras-Lara, F; Pineda, JE; Martín, S; Requena-Torres, MA; Rivilla, VM; Riquelme-Vásquez, D; Sánchez-Monge, Á; Santa-Maria, MG; Smith, HA; Tolls, V; Wang, QD

Circumnuclear eccentric gas flow in the Galactic Center revealed by ALMA CMZ Exploration Survey (ACES)

Export Citation

Sofue, Y, Oka, T, Longmore, S ORCID: 0000-0001-6353-0170, Walker, D, Ginsburg, A, Henshaw, JD ORCID: 0000-0001-9656-7682, Bally, J, Barnes, AT, Battersby, C, Colzi, L, Ho, P, Jimenez-Serra, I, Kruijssen, JMD, Mills, E, Petkova, MA, Sormani, MC, Wallace, J, Armijos-Abendaño, J, Dutkowska, KM, Enokiya, R et al (2025) Circumnuclear eccentric gas flow in the Galactic Center revealed by ALMA CMZ Exploration Survey (ACES). Publications of the Astronomical Society of Japan, 77 (4). L55-L62. ISSN 0004-6264

[thumbnail of Circumnuclear eccentric gas flow in the Galactic Center revealed by ALMA CMZ Exploration Survey ACES.pdf]

Preview

Text
Circumnuclear eccentric gas flow in the Galactic Center revealed by ALMA CMZ Exploration Survey ACES.pdf - Published Version
Available under License Creative Commons Attribution.
Download (2MB) | Preview

Publisher URL: https://academic.oup.com/pasj/article/77/4/L55/820...

Abstract

We analyze the CS (⁠J =2-1) line cube from the internal data release obtained by the large-scale program “ALMA CMZ Exploration Survey (ACES)” to investigate the kinematic structure of the innermost ∼10 pc region of the Galaxy, which contains the high-velocity compact cloud (HVCC) at ( l,b,vLSR) ∼ ( +0º02, -0º02, 100km s⁻¹) (hereafter G0.02). The longitude–velocity diagram (LVD) of the cloud draws an elliptical structure, which is interpreted as an orbital trajectory in the (l,vLSR) space of a noncircular (eccentric) motion of the molecular gas in the gravitational potential of an extended mass distribution in the central 10 pc of the Galaxy. We argue that G0.02 is a kinematic tracer of the inner potential, a rare case of a dense gas following an eccentric orbit in the nuclear gravitational field.

Item Type:	Article
Uncontrolled Keywords:	51 Physical Sciences; 5109 Space Sciences; Galaxy: center; Galaxy: structure; ISM: clouds; ISM: kinematics and dynamics; ISM: molecules; 5109 Space Sciences; 51 Physical Sciences; 0201 Astronomical and Space Sciences; Astronomy & Astrophysics; 5101 Astronomical sciences
Subjects:	Q Science > QB Astronomy Q Science > QC Physics
Divisions:	Astrophysics Research Institute
Publisher:	Oxford University Press
Date of acceptance:	13 June 2025
Date of first compliant Open Access:	13 April 2026
Date Deposited:	13 Apr 2026 13:02
Last Modified:	13 Apr 2026 13:02
DOI or ID number:	10.1093/pasj/psaf072
URI:	https://researchonline.ljmu.ac.uk/id/eprint/28361

View Item

CORE (COnnecting REpositories)