ALCHEMI


The ALma Comprehensive High-resolution Extragalactic Molecular Inventory (ALCHEMI)

ALCHEMI was an ALMA Cycle 5 Large Programme (ALMA project 2017.1.00161.L) designed to image the circumnuclear zone (CMZ: 850x340 pc) of the nearby starburst galaxy NGC253 from 84 to 163 GHz (Bands 3 and 4) and from 211 to 373 GHz (Bands 6 and 7) at 1.6 arcsec (27pc) spatial resolution. An ALMA Cycle 6 project was added to ALCHEMI to augment its capabilities with 1.6 arcsec imaging of the NGC253 CMZ at ALMA Band 5 (163 to 211 GHz: ALMA Project 2018.1.00162.S). Further details on this project can be found on the ALCHEMI web page. A complete listing of publications derived from the ALCHEMI survey is provided below.

2025

  1. Huang et al. 2025
    Investigating the chemical link between H_2CO and CH_3OH within the central molecular zone of NGC 253
    K. -Y. Huang, E. Behrens, M. Bouvier, and 3 more authors
    A&A, Jul 2025
    DOI
  2. Bouvier et al. 2025
    Complex organic molecules towards the central molecular zone of NGC 253
    M. Bouvier, S. Viti, J. G. Mangum, and 9 more authors
    A&A, Jun 2025
    DOI
  3. Gong et al. 2025
    Shock-induced HCNH^+ abundance enhancement in the heart of the starburst galaxy NGC 253 unveiled by ALCHEMI
    Y. Gong, C. Henkel, C. T. Bop, and 15 more authors
    A&A, Apr 2025
    DOI
  4. Kishikawa et al. 2025
    Components of star formation in NGC 253: Non-negative matrix factorization analysis with the ALCHEMI integrated intensity images
    Ryo Kishikawa, Nanase Harada, Toshiki Saito, and 12 more authors
    PASJ, Feb 2025
    DOI

2024

  1. Behrens et al. 2024
    Neural Network Constraints on the Cosmic-Ray Ionization Rate and Other Physical Conditions in NGC 253 with ALCHEMI Measurements of HCN and HNC
    Erica Behrens, Jeffrey G. Mangum, Serena Viti, and 15 more authors
    ApJ, Dec 2024
    DOI
  2. Bouvier et al. 2024
    An ALCHEMI inspection of sulphur-bearing species towards the central molecular zone of NGC 253
    M. Bouvier, S. Viti, E. Behrens, and 19 more authors
    A&A, Sep 2024
    DOI
  3. Physical properties of the southwest outflow streamer in the starburst galaxy NGC 253 with ALCHEMI
    Min Bao, Nanase Harada, Kotaro Kohno, and 19 more authors
    A&A, Jul 2024
    DOI
  4. Butterworth et al. 2024
    Molecular isotopologue measurements toward super star clusters and the relation to their ages in NGC 253 with ALCHEMI
    J. Butterworth, S. Viti, P. P. Van der Werf, and 18 more authors
    A&A, Jun 2024
    DOI
  5. The ALCHEMI Atlas: Principal Component Analysis Reveals Starburst Evolution in NGC 253
    Nanase Harada, David S. Meier, Sergio Martı́n, and 24 more authors
    ApJS, Apr 2024
    DOI
  6. Tanaka et al. 2024
    Volume Density Structure of the Central Molecular Zone NGC 253 through ALCHEMI Excitation Analysis
    Kunihiko Tanaka, Jeffrey G. Mangum, Serena Viti, and 21 more authors
    ApJ, Jan 2024
    DOI

2023

  1. Huang et al. 2023a
    Reconstructing the shock history in the CMZ of NGC 253 with ALCHEMI (Corrigendum)
    K. -Y. Huang, S. Viti, J. Holdship, and 19 more authors
    A&A, Oct 2023
    DOI
  2. Huang et al. 2023
    Reconstructing the shock history in the CMZ of NGC 253 with ALCHEMI
    K. -Y. Huang, S. Viti, J. Holdship, and 19 more authors
    A&A, Jul 2023
    DOI

2022

  1. Behrens et al. 2022
    Tracing Interstellar Heating: An ALCHEMI Measurement of the HCN Isomers in NGC 253
    Erica Behrens, Jeffrey G. Mangum, Jonathan Holdship, and 19 more authors
    ApJ, Nov 2022
    DOI
  2. Harada et al. 2022
    ALCHEMI Finds a “Shocking” Carbon Footprint in the Starburst Galaxy NGC 253
    Nanase Harada, Sergio Martı́n, Jeffrey G. Mangum, and 15 more authors
    ApJ, Oct 2022
    DOI
  3. Methanol masers in NGC 253 with ALCHEMI
    P. K. Humire, C. Henkel, A. Hernández-Gómez, and 23 more authors
    A&A, Jul 2022
    DOI
  4. Holdship et al. 2022
    Energizing Star Formation: The Cosmic-Ray Ionization Rate in NGC 253 Derived from ALCHEMI Measurements of H_3O^+ and SO
    Jonathan Holdship, Jeffrey G. Mangum, Serena Viti, and 17 more authors
    ApJ, Jun 2022
    DOI
  5. ALCHEMI: Results from the ALMA Comprehensive High-resolution Extragalactic Molecular Inventory of NGC253
    Jeffrey G. Mangum, Serena Viti, and Alchemi Collaboration
    In European Physical Journal Web of Conferences, Apr 2022
    DOI
  6. First extragalactic detection of a phosphorus-bearing molecule with ALCHEMI: Phosphorus nitride (PN)
    D. Haasler, V. M. Rivilla, S. Martı́n, and 16 more authors
    A&A, Mar 2022
    DOI

2021

  1. Starburst Energy Feedback Seen through HCO^+/HOC^+ Emission in NGC 253 from ALCHEMI
    Nanase Harada, Sergio Martı́n, Jeffrey G. Mangum, and 19 more authors
    ApJ, Dec 2021
    DOI
  2. Martin et al. 2021
    ALCHEMI, an ALMA Comprehensive High-resolution Extragalactic Molecular Inventory. Survey presentation and first results from the ACA array
    S. Martı́n, J. G. Mangum, N. Harada, and 32 more authors
    A&A, Dec 2021
    DOI
  3. Towards the prediction of molecular parameters from astronomical emission lines using Neural Networks
    Alejandro Barrientos, Jonathan Holdship, Mauricio Solar, and 16 more authors
    ExA, Oct 2021
    DOI
  4. The distribution and origin of C_2H in NGC 253 from ALCHEMI
    J. Holdship, S. Viti, S. Martı́n, and 18 more authors
    A&A, Oct 2021
    DOI