HI-MaNGA is a 21cm follow-up program for the SDSS-IV MaNGA survey, a survey of 10,010 unique galaxies with an Integral Field Unit (for resolved optical spectroscopy). The primary goal of HI-MaNGA is to observe all z<0.05 MaNGA galaxies with the Green Bank Telescope which lack HI data from other sources.

HI-MaNGA provides valuable information about the cold gas content of galaxies, which can help to address several of MaNGA’s key science questions: (1) How does gas accretion drive the growth of galaxies? (2) What are the relative roles of stellar accretion, major mergers, and instabilities in forming galactic bulges and ellipticals? (3) What quenches star formation? What external forces affect star formation in groups and clusters? (4) How was angular momentum distributed among baryonic and non-baryonic components as the galaxy formed, and how do various mass components assemble and influence one another?

Example HI spectra (right) of three MaNGA galaxies

Survey Status

A summary of past and ongoing observing programs, as well as the status of the data, is as follows:

  • 24B-263: TBD (Aug 2024-2026)
    • We have been approved as a filler project in 24B, 25A, 25B and 26A.
    • Watch this space.
  • 16A-095: 193 hours ( Feb 2016-2017)
    • 331 galaxies 
    • Released in Masters et al. (2019), DR1
  • 17A-012: 1080+194 hour extension (Dec 2017-Feb 2019) 
    • 2159 galaxies
    • Majority was released in Stark et al. (2021), DR2 
  • 19A-127: 199 hours (Feb – Apr 2019)
    • 352 galaxies
    • Almost all released in DR3
  • 20B-033: 550 hours (Aug 2020-Jul 2021)
    • 852 galaxies
    • Reduction in progress; some released in DR3
  • 21B-130: 309 hours (Aug 2021-Jan 2022)
    • 428 galaxies
    • Reduction in progress

Data Access


  • An internal version of the catalogue containing slightly more reduced GBT observations than DR3 (but otherwise identical).
  • Contains GBT observations for 3477 MaNGA galaxies.
  • Total is 6546 MaNGA survey galaxies with 6820 independent HI observations.
  • File coming soon.



  • GBT observations of 2135 galaxies
  • ALFALFA crossmatch with 1714 galaxies
  • Catalog description can be found Stark et al. (2021)
  • Individual spectra can be accessed via the SDSS HI-MaNGA page



    The following is an incomplete list of papers which use HI-MaNGA data:

    • Fraser-Mckelvie et al. (in press) “SDSS-IV MaNGA: The link between bars and the early cessation of star formation in spiral galaxies” (arXiv)
    • Fraser-Mckelvie et al. (in press) “SDSS-IV MaNGA: The link between bars and the early cessation of star formation in spiral galaxies” (arXiv)
    • Roberts-Borsani et al. (2020) “Outflows in star-forming galaxies: Stacking analyses of resolved winds and the relation to their hosts’ properties” (arXiv)
    • Lin et al. (2020) “SDSS-IV MaNGA: the indispensable role of bars in enhancing the central star formation of low-z galaxies” (arXiv)
    • Sun et al. (2019) “Environmental Influences on Star Formation in Low-mass Galaxies Observed by the SDSS-IV/MaNGA Survey” (ADS)
    • Goddy et al. (2020) “L-band Calibration of the Green Bank Telescope from 2016─2019” (arXiv)
    • Lin et al. (2017) “SDSS IV MaNGA: Discovery of an Hα Blob Associated with a Dry Galaxy Pair—Ejected Gas or a “Dark” Galaxy Candidate?” (arXiv)
    • Lin et al. (2017) “SDSS-IV MaNGA-resolved Star Formation and Molecular Gas Properties of Green Valley Galaxies: A First Look with ALMA and MaNGA” (arXiv)


    (Team members who contributed to data reduction as undergraduates in italics)

    • Karen Masters (PI)
    • David V. Stark (co-PI)
    • Vladimir Avila-Reese
    • Matthew Bershady
    • Nicholas Fraser Boardman
    • Brian Cherinka
    • Sean Dillon
    • Catherine E. Fielder
    • Daniel Finnegan
    • William Flanders
    • Patricia Fofie
    • Julian Goddy
    • Hedy Goodman
    • Emily Harrington
    • Masha Kilibarda
    • Sophia Lanava
    • Narisara (Mick) Mayer
    • Petra Mengistu
    • Zach Pace
    • Frederika Phipps
    • Rogemar A. Riffel
    • Rogerio Riffel
    • Kate Rowlands
    • Wiphu Rujopakarn
    • Nattida Samanso
    • Jose R. Sanchez-Gallego
    • Shoaib Shamsi
    • Anubhav Sharma
    • Indy Srijumnong
    • Lucy Newnham
    • Margaret (Yunjing) Wang
    • Elizabeth Warrick
    • Anne-Marie Weijmans
    • Catherine A. Witherspoon
    • Marie (Emmy) Wisz
    • Nathan Wolthuis
    • Zheng Zheng

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