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The Central Molecular Zone (CMZ; inner $\sim{}200~\rm{}pc$) of the Milky Way is a star formation (SF) environment with very extreme physical properties. Exploration of SF in this region is important because (i) this region allows us to test…

Astrophysics of Galaxies · Physics 2017-07-12 Jens Kauffmann , Thushara Pillai , Qizhou Zhang , Karl M. Menten , Paul F. Goldsmith , Xing Lu , Andrés E. Guzmán

The star formation rate (SFR) in the Central Molecular Zone (CMZ, i.e. the central 500 pc) of the Milky Way is lower by a factor of >10 than expected for the substantial amount of dense gas it contains, which challenges current star…

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 environment within the inner few hundred parsecs of the Milky Way, known as the "Central Molecular Zone" (CMZ), harbours densities and pressures orders of magnitude higher than the Galactic Disc; akin to that at the peak of cosmic star…

Astrophysics of Galaxies · Physics 2017-02-22 Ashley Thomas Barnes , Steven Longmore , Cara Battersby , John Bally , J. M. Diederik Kruijssen

The Central Molecular Zone (CMZ), located in the centre of the Milky Way, is a roughly cylindrical structure of molecular gas extending up to parsecs around the supermassive black hole Sagittarius A*. The average H2 ionisation rate in the…

High Energy Astrophysical Phenomena · Physics 2025-08-05 Sruthiranjani Ravikularaman , Sarah Recchia , Vo Hong Minh Phan , Stefano Gabici

Copious star formation occurs in the dense Central Molecular Zone (CMZ) of our Galaxy, but at a much smaller rate than occurs in a comparable mass of molecular gas in the Galactic disk. The combination of large turbulent velocity…

Astrophysics of Galaxies · Physics 2023-03-15 Mark R. Morris

We present the magnetic field in the dense material of the Central Molecular Zone (CMZ) of the Milky Way, traced in 850 $\mu$m polarized dust emission as part of the James Clerk Maxwell Telescope (JCMT) B-fields In STar-forming Region…

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…

The star formation rate in the Central Molecular Zone (CMZ) is an order of magnitude lower than predicted according to star formation relations that have been calibrated in the disc of our own and nearby galaxies. Understanding how and why…

The inner few hundred parsecs of the Milky Way, the Central Molecular Zone (CMZ), is our closest laboratory for understanding star formation in the extreme environments (hot, dense, turbulent gas) that once dominated the universe. We…

The central molecular zone (CMZ) plays an essential role in regulating the nuclear ecosystem of our Galaxy. To get an insight into the magnetic fields of the CMZ, we employ the Gradient Technique (GT), which is rooted in the anisotropy of…

Astrophysics of Galaxies · Physics 2022-02-09 Yue Hu , A. Lazarian , Q. Daniel Wang

We present Atacama Large Millimeter/submillimeter Array (ALMA) Band 6 (1.3 mm) observations of dense cores in three massive molecular clouds within the Central Molecular Zone (CMZ) of the Milky Way, including the Dust Ridge cloud e, Sgr C,…

Many galaxies host pronounced circumnuclear starbursts, fuelled by infalling gas. Such activity is expected to drive the secular evolution of the nucleus and generate super winds, while the intense radiation fields and extreme gas and…

Astrophysics of Galaxies · Physics 2021-05-12 J. S. Clark , L. R. Patrick , F. Najarro , C. J. Evans , M. E. Lohr

Several independent lines of evidence reveal that a relatively strong and highly ordered magnetic field is present throughout the Galaxy's central molecular zone (CMZ). The field within dense clouds of the central molecular zone is…

Astrophysics of Galaxies · Physics 2018-03-14 Mark R. Morris

The Milky Way's Central Molecular Zone (CMZ) differs dramatically from our local solar neighbourhood, both in the extreme interstellar medium conditions it exhibits (e.g. high gas, stellar, and feedback density) and in the strong dynamics…

The mass flows and energy cycles within the inner regions of galaxies exert a powerful influence on the evolution of the galaxy population. The centre of the Milky Way is the only galactic nucleus for which it is possible to resolve the…

Astrophysics of Galaxies · Physics 2026-02-25 Steven N. Longmore , John Bally , Ashley T. Barnes , Cara Battersby , Laura Colzi , Adam Ginsburg , Jonathan D. Henshaw , Paul T. P. Ho , Izaskun Jiménez-Serra , J. M. Diederik Kruijssen , Elisabeth A. C. Mills , Maya A. Petkova , Mattia C. Sormani , Robin G. Tress , Daniel L. Walker , Jennifer Wallace , Emad Alkhuja , Lucia Armillotta , Nazar Budaiev , Rojita Buddhacharya , Alyssa Bulatek , Michael Burton , Natalie O. Butterfield , Laura A. Busch , Paola Caselli , Mélanie Chevance , Claire Cook , Samuel Crowe , Ana Karla Díaz-Rodríguez , Enrico DiTeodoro , Simon R. Dicker , Katarzyna M. Dutkowska , Adam Fairley , Christoph Federrath , Rubén Fedriani , Zi-Xuan Feng , Karl Fiteni , Gary Fuller , Pablo García , Javier Goicoechea , Philipp Girichidis , Simon C. O. Glover , Mark Gorski , Savannah R. Gramze , Qi-Lao Gu , H. Perry Hatchfield , Christian Henkel , Rebecca J. Houghton , Pei-Ying Hsieh , Yue Hu , Katharina Immer , Desmond Jeff , Janik Karoly , Jens Kauffmann , Ralf S. Klessen , Mark R. Krumholz , Alex Lazarian , Emily M. Levesque , Fu-Heng Liang , Dani Lipman , Xunchuan Liu , Xing Lu , Qiu-yi Luo , Alessandro Lupi , Laura McCafferty , S. Martín , Farideh Mazoochi , Mark R. Morris , Marie Nonhebel , Francisco Nogueras-Lara , Tomoharu Oka , Juergen Ott , Marco Padovani , Xing Pan , Jaime E. Pineda , Thushara G. S. Pillai , Marc W. Pound , Miguel Requena Torres , Denise Riquelme-Vásquez , Víctor M. Rivilla , Galaxy Salo , Álvaro Sánchez-Monge , Miriam G. Santa-Maria , Rainer Schoedel , Anika Schmiedeke , Matthias Schultheis , Howard A. Smith , Yoshiaki Sofue , Leonardo Testi , Grant R. Tremblay , Arianna Vasini , Gijs Vermariën , Alexey Vikhlinin , Serena Viti , Q. Daniel Wang , Fengwei Xu , Suinan Zhang , Qizhou Zhang

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…

Magnetic fields of molecular clouds in the Central Molecular Zone (CMZ) have been relatively underobserved at sub-parsec resolution. Here we report JCMT/POL2 observations of polarized dust emission in the CMZ, which reveal magnetic field…

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