MIGHTEE-H I: the baryonic Tully-Fisher relation over the last billion years
Date Issued
2021
Author(s)
Ponomareva, Anastasia A.
•
Mulaudzi, Wanga
•
Maddox, Natasha
•
Frank, Bradley S.
•
Jarvis, Matt J.
•
Di Teodoro, Enrico M.
•
Glowacki, Marcin
•
Kraan-Korteweg, Renée C.
•
Oosterloo, Tom A.
•
Adams, Elizabeth A. K.
•
Pan, Hengxing
•
•
Rajohnson, Sambatriniaina H. A.
•
•
Adams, Nathan J.
•
Heywood, Ian
•
Bowler, Rebecca A. A.
•
Hatfield, Peter W.
•
Collier, Jordan D.
•
Sekhar, Srikrishna
Abstract
Using a sample of 67 galaxies from the MeerKAT International GigaHertz Tiered Extragalactic Exploration Survey Early Science data, we study the H I-based baryonic Tully-Fisher relation (bTFr), covering a period of ~1 billion years (0 ≤ z ≤ 0.081). We consider the bTFr based on two different rotational velocity measures: the width of the global H I profile and Vout, measured as the outermost rotational velocity from the resolved H I rotation curves. Both relations exhibit very low intrinsic scatter orthogonal to the best-fitting relation (σ⊥ = 0.07 ± 0.01), comparable to the SPARC sample at z ≃ 0. The slopes of the relations are similar and consistent with the z ≃ 0 studies ($3.66^{+0.35}_{-0.29}$ for W50 and $3.47^{+0.37}_{-0.30}$ for Vout). We find no evidence that the bTFr has evolved over the last billion years, and all galaxies in our sample are consistent with the same relation independent of redshift and the rotational velocity measure. Our results set-up a reference for all future studies of the H I-based bTFr as a function of redshift that will be conducted with the ongoing deep SKA pathfinders surveys.
Volume
508
Issue
1
Start page
1195
Issn Identifier
0035-8711
Ads BibCode
2021MNRAS.508.1195P
Rights
open.access
File(s)![Thumbnail Image]()
Loading...
Name
stab2654.pdf
Description
PDF editoriale
Size
1.43 MB
Format
Adobe PDF
Checksum (MD5)
ecb241b6dd391bb0b98c39a568d6cb0e