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HI-MaNGA is a 21cm follow-up program for the SDSS-IV MaNGA survey. We are currently observing all z<0.05 MaNGA galaxies with the Green Bank Telescope which lack HI data from other sources.

The goal of HI-MaNGA is to provide 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:

  • 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


  • GBT observations of 3358 MaNGA survey galaxies
  • ALFALFA cross match with 3274 MaNGA survey galaxies (including upper limits, and 274 galaxies with data from both ALFALFA and GBT)
  • Total is 6358 MaNGA survey galaxies with 6632 independent HI observations.
  • Catalog description: Stark et al. (2021), and Abdurro’uf et al. (2022)
  • Also see HI-MaNGA page on the SDSS DR17 website, where you can find details of data access.



  • 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 a 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)


(Undergraduate team members in bold)

  • Karen Masters (PI)
  • David V. Stark
  • Vladimir Avila-Reese
  • Matthew Bershady
  • Nicholas Fraser Boardman
  • Brian Cherinka
  • Sean Dillon
  • Catherine E. Fielder
  • Daniel Finnegan
  • Patricia Fofie
  • Julian Goddy
  • Emily Harrington
  • Zach Pace
  • Frederika Phipps
  • Rogemar A. Riffel
  • Rogerio Riffel
  • Kate Rowlands
  • Wiphu Rujopakarn
  • Nattida Samanso
  • Jose R. Sanchez-Gallego
  • Shoaib Shamsi
  • Anubhav Sharma
  • Lucy Newnham
  • Elizabeth Warrick
  • Anne-Marie Weijmans
  • Catherine A. Witherspoon
  • Nathan Wolthuis
  • Zheng Zheng

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