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The Central Molecular Zone (CMZ) is the most extreme star-forming environment in the Milky Way in terms of gas pressures, densities, temperatures, and dynamics. It acts as a critical test bed for developing star formation theories…

Astrophysics of Galaxies · Physics 2019-12-06 Maya A. Petkova , J. M. Diederik Kruijssen

It is well known that the Galactic bar drives a gas inflow into the Central Molecular Zone, which fuels star formation, accretion onto the central super-massive black hole, and large-scale outflows. This inflow happens mostly through two…

Astrophysics of Galaxies · Physics 2019-01-16 Mattia C. Sormani , Ashley T. Barnes

We use hydrodynamical simulations to study the Milky Way's central molecular zone (CMZ). The simulations include a non-equilibrium chemical network, the gas self-gravity, star formation and supernova feedback. We resolve the structure of…

The Central Molecular Zone (CMZ) of the Milky Way is fed by gas inflows from the Galactic disk along almost radial trajectories aligned with the major axis of the Galactic bar. However, despite being fundamental to all processes in the…

We present a study of the gas cycle and star formation history in the central 500 pc of the Milky Way, known as Central Molecular Zone (CMZ). Through hydrodynamical simulations of the inner 4.5 kpc of our Galaxy, we follow the gas cycle in…

Astrophysics of Galaxies · Physics 2019-10-23 L. Armillotta , M. R. Krumholz , E. M. Di Teodoro , N. M. McClure-Griffiths

The innermost region of the Milky Way harbors the central molecular zone (CMZ). This region contains a large amount of molecular gas but a poor star formation rate considering the densities achieved by the gas in this region. We used the…

Astrophysics of Galaxies · Physics 2025-01-29 Leonardo Chaves-Velasquez , Gilberto C. Gómez , Ángeles Pérez-Villegas

We develop a simple dynamical model for the evolution of gas in the centres of barred spiral galaxies, using the Milky Way's Central Molecular Zone (CMZ, i.e., the central few hundred pc) as a case study. We show that, in the presence of a…

Astrophysics of Galaxies · Physics 2015-08-26 Mark R. Krumholz , J. M. Diederik Kruijssen

The Central Molecular Zone (CMZ) is the way station at the heart of our Milky Way Galaxy, connecting gas flowing in from Galactic scales with the central nucleus. Key open questions remain about its 3-D structure, star formation properties,…

We study the gas inflows towards the Galactic Central Molecular Zone (CMZ) based on the gas morphological and kinematic features from the MWISP in the region of l=1.2 deg--19.0 deg and |b|<3.0 deg. We find that the near dust lane extends to…

Astrophysics of Galaxies · Physics 2024-08-06 Yang Su , Shiyu Zhang , Yan Sun , Ji Yang , Qing-Zeng Yan , Shaobo Zhang , Zhiwei Chen , Xuepeng Chen , Xin Zhou , Lixia Yuan

We recently proposed that the star-forming potential of dense molecular clouds in the Central Molecular Zone (CMZ, i.e. the central few 100 pc) of the Milky Way is linked to their orbital dynamics, potentially giving rise to an…

Astrophysics of Galaxies · Physics 2015-06-23 J. M. Diederik Kruijssen , James E. Dale , Steven N. Longmore

We present a dynamical model for gas transport, star formation, and winds in the nuclear regions of galaxies, focusing on the Milky Way's Central Molecular Zone (CMZ). In our model angular momentum and mass are transported by a combination…

Astrophysics of Galaxies · Physics 2017-01-18 Mark R. Krumholz. , J. M. Diederik Kruijssen , Roland M. Crocker

We present the first systematic study of the density structure of clouds found in a complete sample covering all major molecular clouds in the Central Molecular Zone (CMZ; inner $\sim{}200~\rm{}pc$) of the Milky Way. This is made possible…

As part of a series of papers aimed at understanding the evolution of the Milky Way's Central Molecular Zone (CMZ), we present hydrodynamical simulations of turbulent molecular clouds orbiting in an accurate model of the gravitational…

Astrophysics of Galaxies · Physics 2019-04-10 James E. Dale , J. M. Diederik Kruijssen , S. N. Longmore

The Central Molecular Zone (CMZ, the central 500 pc of the Milky Way) contains the largest reservoir of high-density molecular gas in the Galaxy, but forms stars at a rate 10-100 times below commonly-used star formation relations. We…

Astrophysics of Galaxies · Physics 2017-02-22 J. M. Diederik Kruijssen

The Central Molecular Zone (CMZ) is a ring-like accumulation of molecular gas in the innermost few hundred parsecs of the Milky Way, generated by the inward transport of matter driven by the Galactic bar. The CMZ is the most extreme…

Astrophysics of Galaxies · Physics 2022-03-23 Jonathan D. Henshaw , Ashley T. Barnes , Cara Battersby , Adam Ginsburg , Mattia C. Sormani , Daniel L. Walker

The gas distribution and dynamics in the inner Galaxy present many unknowns as the origin of the asymmetry of the longitude-velocity (lv) diagram of the Central Molecular Zone (CMZ). On the other hand, there are recent evidences in the…

Astrophysics · Physics 2009-11-13 Nemesio Rodriguez-Fernandez , Francoise Combes

Molecular clouds in the central molecular zone (CMZ) have been observed to feature turbulent line widths that are significantly higher, and scale with cloud size more steeply, than in the rest of the Milky Way. In the same Galactic region,…

Astrophysics of Galaxies · Physics 2022-05-25 Konstantinos Tassis , Vasiliki Pavlidou

The 3D structure of The Milky Way's Central Molecular Zone (CMZ) informs our understanding of star formation cycles, black hole accretion, and the evolution of galactic nuclei. However, a comprehensive 3D model has remained elusive, as no…

The Milky Way's Central Molecular Zone (CMZ) is the largest concentration of dense molecular gas in the Galaxy, the structure of which is shaped by the complex interplay between Galactic-scale dynamics and extreme physical conditions.…

To quantify the effect that bar driven mass inflow can have on the evolution of a galaxy requires an understanding of the dynamics of the inflowing gas. In this paper we study the kinematics of the dense molecular gas in a set of seven…

Astrophysics · Physics 2009-10-31 Michael W. Regan , Kartik Sheth , Stuart N. Vogel
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