Wang, J;
Catinella, B;
Saintonge, A;
Pan, Z;
Serra, P;
Shao, L;
(2020)
xGASS: H I Fueling of Star Formation in Disk-dominated Galaxies.
The Astrophysical Journal
, 890
(1)
10.3847/1538-4357/ab68dd.
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Abstract
We introduce a method to estimate the H i mass within the optical radius of disk galaxies from integrated H i spectra, with an uncertainty of 0.09 dex. We use these estimates to study how inner H i fuels star formation in late-type disk galaxies. We find that star formation rate (SFR) at a given stellar mass (M *) is well correlated with the inner H i surface density (${{\rm{\Sigma }}}_{{\rm{H}}{\rm{I}},\mathrm{in}}$) and inner H i mass-to-stellar mass ratio. For the massive (M * > 1010 M ⊙) disk galaxies, higher SFR at a given stellar mass is also related to higher efficiency of converting inner H i to molecular gas, but no such correlation is found for the total H i mass. The highest ${{\rm{\Sigma }}}_{{\rm{H}}{\rm{I}},\mathrm{in}}$ and the fastest depletion of the total neutral gas within the optical disks are found in the most compact and star-forming disk galaxies at a given stellar mass. These results highlight the important role of inner H i as an intermediate step of fueling star formation in disk galaxies.
| Type: | Article |
|---|---|
| Title: | xGASS: H I Fueling of Star Formation in Disk-dominated Galaxies |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.3847/1538-4357/ab68dd |
| Publisher version: | https://doi.org/10.3847/1538-4357/ab68dd |
| Language: | English |
| Additional information: | This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Unified Astronomy Thesaurus concepts: Late-type galaxies (907); Interstellar atomic gas (833); Galaxy evolution (594) |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10092372 |
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