HI-MaNGA: Results from (21cm-HI) single-dish observations of MaNGA Survey Galaxies

TL;DR

The HI-MaNGA project enhances MaNGA galaxy data by adding neutral hydrogen observations, enabling better understanding of gas accretion and star formation regulation in nearby galaxies.

Contribution

This work presents the release of the DR3 HI-MaNGA data, combining 21cm HI observations with MaNGA galaxy data for the first time at this scale.

Findings

Collected HI data for 70% of MaNGA galaxies

Enabled studies of gas accretion and star formation processes

Provided a comprehensive dataset for galaxy evolution research

Abstract

In a poster presentation for IAU Symposium 392: "Neutral hydrogen in and around galaxies in the SKA era", we gave an overview of the HI-MaNGA project which is working to obtain complementary information about the cold gas (neutral hydrogen traced by the radio 21cm line) content of Mapping Nearby Galaxies at Apache Point Observatory (MaNGA) sample galaxies. MaNGA, part of the fourth incarnation of the Sloan Digital Sky Surveys (SDSS-IV), obtained spatially resolved spectral maps for 10,000 nearby galaxies selected to create a representative sample out of the SDSS Main Galaxy Sample. MaNGA data have provided a census of the stellar and ionized gas content of these galaxies, as well as kinematics of both stars and gas. Adding HI information via the HI-MaNGA program, which has observed or collected 21cm line data for 70% of the full MaNGA sample, has been crucial for a number of applications, but especially understanding the physical mechanisms that regulate gas accretion, and through that star formation and quenching of star formation. This conference proceedings article accompanies the release of the DR3 version of HI-MaNGA data.