Quark-Novae Ia in the Hubble diagram: Implications For Dark Energy
arXiv:1310.4535 · doi:10.1088/1674-4527/14/5/001
Abstract
The accelerated expansion of the Universe was proposed through the use of Type-Ia SNe as standard candles. The standardization depends on an empirical correlation between the stretch/color and peak luminosity of the light curves. The use of Type Ia SN as standard candles rests on the assumption that their properties (and this correlation) do not vary with red-shift. We consider the possibility that the majority of Type-Ia SNe are in fact caused by a Quark-Nova detonation in a tight neutron-star-CO-white-dwarf binary system; a Quark-Nova Ia. The spin-down energy injected by the Quark Nova remnant (the quark star) contributes to the post-peak light curve and neatly explains the observed correlation between peak luminosity and light curve shape. We demonstrate that the parameters describing Quark-Novae Ia are NOT constant in red-shift. Simulated Quark-Nova Ia light curves provide a test of the stretch/color correlation by comparing the true distance modulus with that determined using SN light curve fitters. We determine a correction between the true and fitted distance moduli which when applied to Type-Ia SNe in the Hubble diagram recovers the Omega_M = 1 cosmology. We conclude that Type-Ia SNe observations do not necessitate the need for an accelerating expansion of the Universe (if the observed SNe-Ia are dominated by QNe-Ia) and by association the need for Dark Energy.
22 pages, 6 figures. Accepted for publication in Research in Astronomy and Astrophysics
References in corpus (18)
- Shapiro delay measurement of a two solar mass neutron star
- Dark Energy and the Accelerating Universe
- New Hubble Space Telescope Discoveries of Type Ia Supernovae at z > 1: Narrowing Constraints on the Early Behavior of Dark Energy
- Improved Cosmological Constraints from New, Old and Combined Supernova Datasets
- Spectra and Light Curves of Six Type Ia Supernovae at 0.511 < z < 1.12 and the Union2 Compilation
- Common Envelope Evolution: Where we stand and how we can move forward
- Double-detonation sub-Chandrasekhar supernovae: can minimum helium shell masses detonate the core?
- The Initial-Final Mass Relation: Direct Constraints at the Low Mass End
- Quark matter in compact stars?
- The initial-final mass relationship of white dwarfs revisited: effect on the luminosity function and mass distribution
- Formation of millisecond pulsars with CO white dwarf companions - II. Accretion, spin-up, true ages and comparison to MSPs with He white dwarf companions
- Testing Models of Intrinsic Brightness Variations in Type Ia Supernovae, and their Impact on Measuring Cosmological Parameters
- Slow-roll k-essence
- Numerical Simulation of the Hydrodynamical Combustion to Strange Quark Matter
- Supernova SN2006gy as a first ever Quark Nova?
- Nucleosynthesis in neutron-rich ejecta from quark-novae
- On the Rates of Type Ia Supernovae in Dwarf and Giant Hosts with ROTSE-IIIb
- Quark-Novae in Low-Mass X-ray Binaries with massive neutron stars: A universal model for short-hard Gamma-Ray Bursts