Saved in:
| Main Authors: | , |
|---|---|
| Format: | Preprint |
| Published: |
2023
|
| Subjects: | |
| Online Access: | https://arxiv.org/abs/2310.15812 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
Table of Contents:
- To determine whether or not H II starburst galaxies (H IIG) are standardizable candles, we study the correlation between the H$β$ luminosity ($L$) and the velocity dispersion ($σ$) of the ionized gas from H IIG measurements by simultaneously constraining the $L-σ$ relation parameters and the cosmological model parameters. We investigate six flat and nonflat relativistic dark energy cosmological models. We find that low-redshift and high-redshift H IIG data subsets are standardizable but obey different $L-σ$ relations. Current H IIG data are too sparse and too non-uniformly distributed in redshift to allow for a determination of why the samples follow different relations, but it could be caused by the high-redshift sample containing relatively fewer intrinsically dimmer sources (Malmquist bias) or it could be a consequence of H IIG evolution. Until this issue is better understood, H IIG data cosmological constraints must be treated with caution.