An independent determination of the local Hubble constant

被引：70

作者：

Fernandez Arenas, David ^{[1
]}

Terlevich, Elena ^{[1
]}

Terlevich, Roberto ^{[1
,2
]}

Melnick, Jorge ^{[3
,4
]}

Chavez, Ricardo ^{[5
,6
]}

Bresolin, Fabio ^{[7
]}

Telles, Eduardo ^{[4
]}

Plionis, Manolis ^{[8
,9
]}

Basilakos, Spyros ^{[10
]}

机构：

[1] Inst Nacl Astrofis Opt & Electr, Puebla, Mexico

[2] Univ Cambridge, Inst Astron, Cambridge CB3 0HA, England

[3] European Southern Observ, Av Alonso de Cordova 3107, Santiago, Chile

[4] Observ Nacl, Rua Jose Cristino 77, BR-20921400 Rio De Janeiro, Brazil

[5] Univ Cambridge, Cavendish Lab, 19 JJ Thomson Ave, Cambridge CB3 0HE, England

[6] Univ Cambridge, Kavli Inst Cosmol, Madingley Rd, Cambridge CB3 0HA, England

[7] Univ Hawaii, Inst Astron, 2680 Woodlawn Dr, Honolulu, HI 96822 USA

[8] Natl Observ Athens P Pendeli, Athens, Greece

[9] Aristotle Univ Thessaloniki, Phys Dept, Thessaloniki 54124, Greece

[10] Acad Athens, Res Ctr Astron & Appl Math, Soranou Efessiou 4, Athens 11527, Greece

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2018年 / 474卷 / 01期

关键词：

H II regions; galaxies: star formation; distance scale; cosmology: observations; H-II REGIONS; SPACE-TELESCOPE OBSERVATIONS; EQUATION-OF-STATE; CEPHEID DISTANCE; VELOCITY DISPERSIONS; PRECISION COSMOLOGY; GALACTIC CEPHEIDS; EMISSION-LINE; HII GALAXIES; KEY PROJECT;

D O I：

10.1093/mnras/stx2710

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The relationship between the integrated H beta 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 similar to 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) kms(-1) Mpc(-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.

引用

页码：1250 / 1276

页数：27

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