SIMBAD references

2018MNRAS.474.1250F - Mon. Not. R. Astron. Soc., 474, 1250-1276 (2018)

An independent determination of the local Hubble constant.

FERNANDEZ ARENAS D., TERLEVICH E., TERLEVICH R., MELNICK J., CHAVEZ R., BRESOLIN F., TELLES E., PLIONIS M. and BASILAKOS S.

Abstract (from CDS):

The relationship between the integrated H β line luminosity and the velocity dispersion of the ionized gas of H II galaxies and giant H II regions represents an exciting standard candle that presently can be used up to redshifts z ∼ 4. Locally it is used to obtain precise measurements of the Hubble constant by combining the slope of the relation obtained from nearby (z <= 0.2) H II galaxies with the zero-point determined from giant H II regions belonging to an 'anchor sample' of galaxies for which accurate redshift-independent distance moduli are available. We present new data for 36 giant H II regions in 13 galaxies of the anchor sample that includes the megamaser galaxy NGC 4258. Our data are the result of the first 4 yr of observation of our primary sample of 130 giant H II regions in 73 galaxies with Cepheid determined distances. Our best estimate of the Hubble parameter is 71.0 ± 2.8(random) ± 2.1(systematic) km s^- 1Mpc- 1^. This result is the product of an independent approach and, although at present less precise than the latest SNIa results, it is amenable to substantial improvement.

Abstract Copyright: © 2017 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): H ii regions - galaxies: star formation - distance scale - cosmology: observations

Status in Simbad:  being processed

Simbad objects: 46

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2019.10.16-10:37:32

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