Using the Baryonic Tully–Fisher Relation to Measure Ho
Using the Baryonic Tully–Fisher Relation to Measure Ho
复制标题
使用重子塔利-费舍尔关系来测量 Ho
作者:
J. Schombert;S. McGaugh;F. Lelli
We explore the use of the baryonic Tully–Fisher relation (bTFR) as a new distance indicator. Advances in near-IR imaging and stellar population models, plus precise rotation curves, have reduced the scatter in the bTFR such that distance is the dominant source of uncertainty. Using 50 galaxies with accurate distances from Cepheids or the tip magnitude of the red giant branch, we calibrate the bTFR on a scale independent of Ho. We then apply this calibrated bTFR to 95 independent galaxies from the SPARC sample, using CosmicFlows-3 velocities, to deduce the local value of Ho. We find Ho = 75.1 ± 2.3 (stat) ±1.5 (sys) km s−1 Mpc−1.
DOI:
10.3847/2515-5172/ab8471
发表时间:
2020
期刊:
Research Notes of the AAS
影响因子:
--
作者:
McGaugh, Stacy S.;Lelli, Federico;Schombert, James M.
通讯作者:
Schombert, James M.
DOI:
10.3847/1538-4365/ab700e
发表时间:
2020
期刊:
The Astrophysical Journal Supplement Series
影响因子:
--
作者:
Li, Pengfei;Lelli, Federico;McGaugh, Stacy;Schombert, James
通讯作者:
Schombert, James
影响因子:
5
作者:
Aubourg, Eric;Bailey, Stephen;Zhao, Gong-Bo
通讯作者:
Zhao, Gong-Bo