## Search

Now showing items 1-10 of 40

#### Wave functions for arbitrary operator ordering in the de Sitter minisuperspace approximation

(University of Canterbury. Physics and Astronomy, 2000)

We derive exact series solutions for the Wheeler-DeWitt equation corresponding
to a spatially closed Friedmann-Robertson-Walker universe with
cosmological constant for arbitrary operator ordering of the scale factor of ...

#### Type Ia supernovae tests of fractal bubble universe with no cosmic acceleration

(E-print astro-ph/0504192University of Canterbury. Physics and Astronomy, 2005)

The unexpected dimness of Type Ia supernovae at redshifts z ≲ 1 has over the past
7 years been seen as an indication that the expansion of the universe is accelerating.
A new model cosmology, the “fractal bubble model”, ...

#### Ten new semi-regular variables in Sagittarius

(University of Canterbury. AVC Research Office, 2002)

#### Gravitational energy as dark energy: Towards concordance cosmology without Lambda

(University of Canterbury. Physics and Astronomy, 2009)

I briefly outline a new physical interpretation to the average cosmological parameters for an inhomogeneous universe with backreaction. The variance in local geometry and gravitational energy between ideal isotropic observers ...

#### BQ Ind: a double-mode SX Phoenicis star?

(University of Canterbury. University Centre for Teaching and LearningUniversity of Canterbury. AVC Research Office, 2003)

From time-series photometry of BQ Ind we derive a primary f₁ = 12.1951 d⁻¹ and a secondary frequency f₂ = 15.7686 d⁻¹ . The period ratio P₂/P₁ = 0.7734 suggests that BQ Ind is a double-mode SX Phoenicis Star. With f₁ the ...

#### Gravitational energy as dark energy: Concordance of cosmological tests

(University of Canterbury. Physics and Astronomy, 2008)

We provide preliminary quantitative evidence that a new solution to averaging the observed inhomogeneous structure of matter in the universe may lead to an observationally viable cosmology without exotic dark energy. We ...

#### Astronomy Education: Becoming a Hybrid Researcher

(University of Canterbury. University Centre for Teaching and LearningUniversity of Canterbury. AVC Research Office, 2007)

This article describes the experiences of a former astronomer who is making the
transition to astronomy education research as an international graduate student in the
United States. The article describes the author’s ...

#### Optical monitoring of GM Sgr and discovery of a Mira and a short-period pulsator

(University of Canterbury. AVC Research Office, 2002)

This Note is the third in a series of Notes where we report new variable stars discovered during our extensive CCD monitoring program of the black hole binary V 4641 Sgr (SAX J1819.3-2525, Orosz et al. 2001). In this Note ...

#### A Lack of Planets in 47 Tucanae from an HST Search

(2000)

We report results from a large Hubble Space Telescope project to observe a
significant (~34,000) ensemble of main sequence stars in the globular cluster
47 Tucanae with a goal of defining the frequency of inner-orbit, ...

#### Accelerating cosmologies from compactification with a twist

(University of Canterbury. Physics and Astronomy, 2005)

It is demonstrated by explicit solutions of the 4+n–dimensional vacuum Einstein equations that
accelerating cosmologies in the Einstein conformal frame can be obtained by a time–dependent compactification
of string/M–theory, ...