2012MNRAS.425L..56C

Query : 2012MNRAS.425L..56C

2012MNRAS.425L..56C - Mon. Not. R. Astron. Soc., 425, L56-L60 (2012/September-1)

Determining the Hubble constant using giant extragalactic H II regions and H II galaxies.

CHAVEZ R., TERLEVICH E., TERLEVICH R., PLIONIS M., BRESOLIN F., BASILAKOS S. and MELNICK J.

Abstract (from CDS):

We report the first results of a long-term programme aiming to provide accurate independent estimates of the Hubble constant (H0) using the L(Hβ)–σ distance estimator for giant extragalactic H II regions (GEHR) and H II galaxies.

We have used Very Large Telescope and Subaru high-dispersion spectroscopic observations of a local sample of H II galaxies, identified in the Sloan Digital Sky Survey Data Release 7 (SDSS DR7) catalogue in order to redefine and improve the L(Hβ)–σ distance indicator and to determine the Hubble constant. To this end, we utilized as local calibration or `anchor' of this correlation GEHR in nearby galaxies which have accurate distance measurements determined via primary indicators. Using our best sample of 69 nearby H II galaxies and 23 GEHR in nine galaxies, we obtain H0= 74.3 ± :.1 (statistical)±2.9 (systematic) km/s.M/pc, in excellent agreement with, and independently confirming, the most recent Type Ia supernovae based results.


Abstract Copyright: 2012 The Authors Monthly Notices of the Royal Astronomical Society2012 RAS

Journal keyword(s): H {sc ii} regions - cosmological parameters - distance scale

Simbad objects: 13

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Number of rows : 13
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 12317 1
2 M 33 GiG 01 33 50.8965749232 +30 39 36.630403128 6.17 6.27 5.72     ~ 6226 1
3 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
4 UGCA 116 AGN 05 55 42.645 +03 23 32.23 10.74 11.68 11.46   11.82 ~ 561 0
5 NGC 2366 H2G 07 28 52.4529 +69 12 38.859 12.25 11.86 11.39 11.33   ~ 801 0
6 NGC 2403 AGN 07 36 51.3381434280 +65 36 09.650825640 9.31 8.84 8.38 8.19   ~ 1887 1
7 Mrk 116 AGN 09 34 02.1 +55 14 25           ~ 1179 1
8 IC 2574 AG? 10 28 23.6148831408 +68 24 43.440012756 11.70 11.07 10.87 10.74   ~ 703 1
9 NGC 4236 GiG 12 16 42.118 +69 27 45.25 10.97 10.58 10.08 9.90   ~ 415 1
10 M 106 Sy2 12 18 57.620 +47 18 13.39   9.14 8.41 8.11   ~ 2512 4
11 M 101 GiP 14 03 12.583 +54 20 55.50   8.46 7.86 7.76   ~ 3138 2
12 NGC 6822 G 19 44 56.199 -14 47 51.29   18 8.1     ~ 1661 0
13 NAME Local Group GrG ~ ~           ~ 9325 0

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