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ALMA Central molecular zone Exploration Survey (ACES) V: CS(2-1), SO(2_3-1_2), CH3CHO(5_1,4-4_1,3), HC3N(11-10), and H40a lines data

Pei-Ying Hsieh, Daniel L. Walker, Adam Ginsburg, Ashley T. Barnes, Xing Lu, Álvaro Sánchez-Monge, Savannah R. Gramze, Nazar Budaiev, Marc W. Pound, Jaime E. Pineda, Claire Cook, Jonathan D. Henshaw, Katharina Immer, Namitha Issac, Desmond Jeff, Fu-Heng Liang, Steven N. Longmore, Elisabeth A. C. Mills, Sergio Martín, Xing Pan, Thushara G. S. Pillai, Qizhou Zhang, John Bally, Cara Battersby, Laura Colzi, Paul T. P. Ho, Izaskun Jiménez-Serra, J. M. Diederik Kruijssen, Maya Petkova, Mattia C. Sormani, Robin G. Tress, Jennifer Wallace, J. Armijos-Abendaño, Lucia Armillotta, N. Bijas, Rojita Budhathoki-Chhetrya, Laura A. Busch, Natalie O. Butterfield, Mélanie Chevance, Ana Karla Díaz-Rodríguez, Christoph Federrath, Rubén Fedriani, Pablo García, Qi-Lao Gu, Rebecca J. Houghton, Yue Hu, Janik Karoly, Ralf S. Klessen, Mark R. Krumholz, Farideh Mazoochi, Francisco Soguera-Lara, Dylan Paré, Denise Riquelme-Vásquez, Víctor M. Rivilla, Miriam G. Santa-Maria, Anika Schmiedeke, Yoshiaki Sofue, Volker Tolls, Q. Daniel Wang, Gwenllian M. Williams, Fengwei Xu, Suinan Zhang

Abstract

We present data from the ALMA Central Molecular Zone Exploration Survey (ACES) Large Program, which provides broad spectral-line and 3 mm continuum coverage of the Central Molecular Zone (CMZ) at a spatial resolution of 0.1 pc. The survey delivers homogeneous, wide-field mosaics that enable direct comparisons of the physical and chemical conditions across diverse environments in the Galactic center. In this data release paper, we present the CS(2-1), SO(2_3-1_2), CH3CHO(5_1,4-4_1,3), HC3N(11-10), and H40a lines observed simultaneously within two broad spectral windows. These lines reveal pronounced spatial and chemical variations across the CMZ, tracing distinct components of molecular gas, shock-affected regions, and ionized structures. The high angular resolution and multi-line capability of the ACES dataset make it a powerful resource for future studies of gas dynamics, star formation activity, and the physical connection between the CMZ and Sgr A*.

ALMA Central molecular zone Exploration Survey (ACES) V: CS(2-1), SO(2_3-1_2), CH3CHO(5_1,4-4_1,3), HC3N(11-10), and H40a lines data

Abstract

We present data from the ALMA Central Molecular Zone Exploration Survey (ACES) Large Program, which provides broad spectral-line and 3 mm continuum coverage of the Central Molecular Zone (CMZ) at a spatial resolution of 0.1 pc. The survey delivers homogeneous, wide-field mosaics that enable direct comparisons of the physical and chemical conditions across diverse environments in the Galactic center. In this data release paper, we present the CS(2-1), SO(2_3-1_2), CH3CHO(5_1,4-4_1,3), HC3N(11-10), and H40a lines observed simultaneously within two broad spectral windows. These lines reveal pronounced spatial and chemical variations across the CMZ, tracing distinct components of molecular gas, shock-affected regions, and ionized structures. The high angular resolution and multi-line capability of the ACES dataset make it a powerful resource for future studies of gas dynamics, star formation activity, and the physical connection between the CMZ and Sgr A*.
Paper Structure (18 sections, 14 figures, 3 tables)

This paper contains 18 sections, 14 figures, 3 tables.

Table of Contents

  1. Introduction
  2. Observations and Data Processing
  3. ACES Data Products and Structural Highlights
  4. Moment Maps of CMZ Mosaics
  5. mom 1 map and longitude-velocity maps
  6. Key Structures
  7. The circumnuclear disk
  8. The Brick
  9. The 20 and 50 km s$^{-1}$ cloud
  10. The three little pigs (TLP)
  11. Morphological Correlations Between the CS($2-1$), SO(2$_{3}-1_{2}$), HC$_3$N($11-10$), CH$_3$CHO($5_{1,4}-4_{1,3}$) and SiO(2-1)
  12. Summary
  13. Zoom-Ins of H40$\alpha$ line
  14. 2-D correlation matrix
  15. Data release summary
  16. ...and 3 more sections

Figures (14)

  • Figure 1: The spectra of broad spectral windows (SPW 33, 35) towards the Sgr C MM1 hot core and water maser core of Brick cloud. The lines presented in this paper are labeled. The native channel width of broad spectral window is 1.48 km s$^{-1}$ with an effective bandwidth of $\sim1.86$ GHz ($\sim$ 5680 km s$^{-1}$ per spectral window).
  • Figure 2: The ratio of ACES and NRO 45m map. The ratio map was made with the integrated intensity maps.
  • Figure 3: ALMA integrated intensity maps (mom 0) of CS($2-1$), SO(2$_{3}-1_{2}$), HC$_3$N($11-10$) and CH$_3$CHO($5_{1,4}-4_{1,3}$) lines towards the CMZ. The nomenclature of previously identified features are labeled. The common beam size is 2.84$\times$ 2.11 with a position angle of $-$89.46$^\circ$ for the CS($2-1$), SO(2$_{3}-1_{2}$), and CH$_3$CHO($5_{1,4}-4_{1,3}$) lines. The common beam size is 2.65$\times$ 1.97 with a position angle of $-$89.96$^\circ$ for the HC$_3$N($11-10$) line. Note that the acetaldehyde line (CH$_3$CHO($5_{1,4}-4_{1,3}$)) maps are integrated with CH$_3$CHO($5_{1,4}-4_{1,3}$) E and CH$_3$CHO($5_{1,4}-4_{1,3}$) A.
  • Figure 4: ALMA peak intensity maps (mom 8) of CS($2-1$), SO(2$_{3}-1_{2}$), HC$_3$N($11-10$) and CH$_3$CHO($5_{1,4}-4_{1,3}$) lines towards the CMZ. Note that the acetaldehyde line (CH$_3$CHO($5_{1,4}-4_{1,3}$)) maps are stacked with CH$_3$CHO($5_{1,4}-4_{1,3}$) E and CH$_3$CHO($5_{1,4}-4_{1,3}$) A (also see Figure \ref{['fig:spectrum']}).
  • Figure 5: ALMA mosaic map of H40$\alpha$ line towards the CMZ. From the top to the bottom we present the mom 0, peak intensity, and mom 1 images. The common beam size is 2.84$\times$ 2.11 with a position angle of $-$89.46$^\circ$.
  • ...and 9 more figures