Journal article
MIGHTEE-H I: the MH I – M* relation over the last billion years
- Abstract:
-
We study the MHI−M⋆ relation over the last billion years using the MIGHTEE-H i sample. We first model the upper envelope of the MHI−M⋆ relation with a Bayesian technique applied to a total number of 249 H i-selected galaxies, without binning the datasets, while taking account of the intrinsic scatter. We fit the envelope with both linear and non-linear models, and find that the non-linear model is preferred over the linear one with a measured transition stellar mass of log10 (M⋆M⊙) = 9.15±0.87, beyond which the slope flattens. This finding supports the view that the lack of H i gas is ultimately responsible for the decreasing star formation rate observed in the massive main-sequence galaxies. For spirals alone, which are biased towards the massive galaxies in our sample, the slope beyond the transition mass is shallower than for the full sample, indicative of distinct gas processes ongoing for the spirals/high-mass galaxies from other types with lower stellar masses. We then create mock catalogues for the MIGHTEE-H i detections and non-detections with two main galaxy populations of late- and early-type galaxies to measure the underlying MHI−M⋆ relation. We find that the turnover in this relation persists whether considering the two galaxy populations as a whole or separately. We note that an underlying linear relation could mimic this turnover in the observed scaling relation, but a model with a turnover is strongly preferred. Measurements on the logarithmic average of H i masses against the stellar mass are provided as a benchmark for future studies.
- Publication status:
- Published
- Peer review status:
- Peer reviewed
Actions
Access Document
- Files:
-
-
(Preview, Accepted manuscript, pdf, 1.3MB, Terms of use)
-
- Publisher copy:
- 10.1093/mnras/stad2343
Authors
- Publisher:
- Oxford University Press
- Journal:
- Monthly Notices of the Royal Astronomical Society More from this journal
- Volume:
- 525
- Issue:
- 1
- Pages:
- 256-269
- Publication date:
- 2023-08-03
- Acceptance date:
- 2023-07-26
- DOI:
- EISSN:
-
1365-2966
- ISSN:
-
0035-8711
- Language:
-
English
- Keywords:
- Pubs id:
-
1501176
- Local pid:
-
pubs:1501176
- Deposit date:
-
2023-10-13
Terms of use
- Copyright holder:
- Pan et al.
- Copyright date:
- 2023
- Rights statement:
- © 2023 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society
- Notes:
-
For the purpose of Open Access, the author has applied a CC BY
public copyright licence to any Author Accepted Manuscript version
arising from this submission.
This is the author accepted manuscript following peer review version of the article. The final version is available online from Oxford University Press at https://dx.doi.org/10.1093/mnras/stad2343
- Licence:
- CC Attribution (CC BY)
If you are the owner of this record, you can report an update to it here: Report update to this record