The Hubble constant

Jeremy Mould

doi:10.1071/AS00045a

The Hubble constant

Jeremy Mould^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

1 Citation (Scopus)

Abstract

With the completion of the Hubble Space Telescope (HST) Key Project on the Extragalactic Distance Scale, it is interesting to form the dimensionless quantity H_ot_o by multiplying the Hubble Constant by the age of the Universe. In a matter dominated decelerating Universe with a density exceeding 0 · 26 of the critical value, H_ot_o < 1; in an accelerating Universe with the same Ω_m = 0 · 26, but dominated by vacuum energy with Ω_V ≥ 1 - Ω_m, H_ot_o ≥ 1. If the first globular clusters formed 10⁹ years after the Big Bang, then with 95% confidence H_ot_o = 1 · 0 ± 0 · 3. The classical Einstein-de Sitter cosmological model has H_ot_o = 2/3.

Original language	English
Pages (from-to)	45-47
Number of pages	3
Journal	Publications of the Astronomical Society of Australia
Volume	17
Issue number	1
DOIs	https://doi.org/10.1071/AS00045a
Publication status	Published - 2000

Access to Document

10.1071/AS00045a

Cite this

@article{068daf8de3804155a19484bacd3f67d0,

title = "The Hubble constant",

abstract = "With the completion of the Hubble Space Telescope (HST) Key Project on the Extragalactic Distance Scale, it is interesting to form the dimensionless quantity Hoto by multiplying the Hubble Constant by the age of the Universe. In a matter dominated decelerating Universe with a density exceeding 0 · 26 of the critical value, Hoto < 1; in an accelerating Universe with the same Ωm = 0 · 26, but dominated by vacuum energy with ΩV ≥ 1 - Ωm, Hoto ≥ 1. If the first globular clusters formed 109 years after the Big Bang, then with 95% confidence Hoto = 1 · 0 ± 0 · 3. The classical Einstein-de Sitter cosmological model has Hoto = 2/3.",

keywords = "Cosmology: distance scale, Galaxies: formation",

author = "Jeremy Mould",

year = "2000",

doi = "10.1071/AS00045a",

language = "English",

volume = "17",

pages = "45--47",

journal = "Publications of the Astronomical Society of Australia",

issn = "1323-3580",

publisher = "Cambridge University Press",

number = "1",

}

TY - JOUR

T1 - The Hubble constant

AU - Mould, Jeremy

PY - 2000

Y1 - 2000

N2 - With the completion of the Hubble Space Telescope (HST) Key Project on the Extragalactic Distance Scale, it is interesting to form the dimensionless quantity Hoto by multiplying the Hubble Constant by the age of the Universe. In a matter dominated decelerating Universe with a density exceeding 0 · 26 of the critical value, Hoto < 1; in an accelerating Universe with the same Ωm = 0 · 26, but dominated by vacuum energy with ΩV ≥ 1 - Ωm, Hoto ≥ 1. If the first globular clusters formed 109 years after the Big Bang, then with 95% confidence Hoto = 1 · 0 ± 0 · 3. The classical Einstein-de Sitter cosmological model has Hoto = 2/3.

AB - With the completion of the Hubble Space Telescope (HST) Key Project on the Extragalactic Distance Scale, it is interesting to form the dimensionless quantity Hoto by multiplying the Hubble Constant by the age of the Universe. In a matter dominated decelerating Universe with a density exceeding 0 · 26 of the critical value, Hoto < 1; in an accelerating Universe with the same Ωm = 0 · 26, but dominated by vacuum energy with ΩV ≥ 1 - Ωm, Hoto ≥ 1. If the first globular clusters formed 109 years after the Big Bang, then with 95% confidence Hoto = 1 · 0 ± 0 · 3. The classical Einstein-de Sitter cosmological model has Hoto = 2/3.

KW - Cosmology: distance scale

KW - Galaxies: formation

UR - http://www.scopus.com/inward/record.url?scp=0034419886&partnerID=8YFLogxK

U2 - 10.1071/AS00045a

DO - 10.1071/AS00045a

M3 - Article

SN - 1323-3580

VL - 17

SP - 45

EP - 47

JO - Publications of the Astronomical Society of Australia

JF - Publications of the Astronomical Society of Australia

IS - 1

ER -

The Hubble constant

Abstract

Access to Document

Other files and links

Fingerprint

Cite this