Current and future supernova constraints on decaying lambda cosmologies

We investigate observational constraints from present and future supernova data on a large class of decaying vacuum cosmologies. In such scenarios the present value of the vacuum energy density is quantified by a positive

\beta

parameter smaller than unity. By assuming a Gaussian prior on the matter density parameter (

\Omega_{\rm{m}} = 0.35 \pm 0.07

) we find

\Omega_{\rm{m}} = 0.34^{+0.14}_{-0.12}

and

\beta = 0.62^{+0.12}_{-0.24}

(95% c.l.) as the best fit values for the present data. We show that, while the current data cannot provide restrictive constraints on the

\Omega_{\rm{m}} - \beta

plane, the future SNe data will limit considerably the allowed space of parameter. A brief discussion about the equivalence between dynamical-

\Lambda

scenarios and scalar field cosmologies is also included.

98.62.Ai
98.80.Es
95.35.+d
supernova
vacuum state: decay
energy: density
cosmological model
field theory: scalar
cosmological constant
numerical calculations

References(60)

Figures(0)

Measurements of $\Omega$ and $\Lambda$ from 42 High Redshift Supernovae

Supernova Cosmology Project

Collaboration

•

S. Perlmutter
(
- UC, Berkeley, CfPA
)

et al.

- Astrophys.J. 517 (1999) 565-586
•
e-Print:
- astro-ph/9812133
•
DOI:
- 10.1086/307221

Observational evidence from supernovae for an accelerating universe and a cosmological constant

et al.

- Astron.J. 116 (1998) 1009-1038
•
e-Print:
- astro-ph/9805201
•
DOI:
- 10.1086/300499

A Flat universe from high resolution maps of the cosmic microwave background radiation

Boomerang

Collaboration

•

P. de Bernardis
(
- Rome U.
)

et al.

- Nature 404 (2000) 955-959
•
e-Print:
- astro-ph/0004404
•
DOI:
- 10.1038/35010035

Cosmological parameters from the first results of BOOMERANG

Boomerang

Collaboration

•

Andrew E. Lange
(
- Caltech
)

et al.

- Phys.Rev.D 63 (2001) 042001
•
e-Print:
- astro-ph/0005004
•
DOI:
- 10.1103/PhysRevD.63.042001

Constraints on cosmological parameters from MAXIMA-1

A. Balbi
(
- Rome U., Tor Vergata and
- UC, Berkeley, CfPA and
- LBL, Berkeley
)
,
P. Ade
(
- Queen Mary, U. of London
)
,
J. Bock
(
- Caltech, JPL and
- Caltech
)
,
J. Borrill
(
- LBL, Berkeley and
- UC, Berkeley, CfPA
)
,
A. Boscaleri
(
- Florence, IROE
)

et al.

- Astrophys.J.Lett. 545 (2000) L1-L4,
- Astrophys.J.Lett. 558 (2001) L145-L146 (erratum)
•
e-Print:
- astro-ph/0005124
•
DOI:
- 10.1086/323608

Galaxy cluster virial masses and Omega

Ray Carlberg
(
- Toronto U., Astron. Dept.
)
,
H.K.C. Yee
(
- Toronto U., Astron. Dept.
)
,
E. Ellingson
(
- Colorado U., CASA
)
,
R. Abraham
(
- Cambridge U., Inst. of Astron. and
- NRC-HIA, Victoria
)
,
P. Gravel
(
- Toronto U., Astron. Dept.
)

et al.

- Astrophys.J. 462 (1996) 32
•
e-Print:
- astro-ph/9509034
•
DOI:
- 10.1086/177125

Distances, ages and epoch of formation of globular clusters

Eugenio Carretta
(
- Padua Observ.
)
,
Raffaele G. Gratton
(
- Padua Observ.
)
,
Gisella Clementini
(
- Bologna Observ.
)
,
Flavio Fusi Pecci
(
- Bologna Observ.
)

- Astrophys.J. 533 (2000) 215-235
•
e-Print:
- astro-ph/9902086
•
DOI:
- 10.1086/308629

New globular cluster age estimates and constraints on the cosmic equation of state and the matter density of the universe

Lawrence M. Krauss
(
- Case Western Reserve U. and
- Dartmouth Coll.
)
,
Brian Chaboyer
(
- Case Western Reserve U. and
- Dartmouth Coll.
)

e-Print:
- astro-ph/0111597

The determination of the age of globular clusters: a statistical approach s

- IAU Symp. 207 (2002) 716
•
e-Print:
- astro-ph/0106211

Old galaxies at high redshift and the cosmological constant

Lawrence M. Krauss
(
- Case Western Reserve U.
)

- Astrophys.J. 480 (1997) 466-469
•
e-Print:
- astro-ph/9607103
•
DOI:
- 10.1086/304009

New limits on omega_ lambda and omega_m from old galaxies at high redshift

- Astrophys.J.Lett. 521 (1999) L87
•
e-Print:
- astro-ph/9902298
•
DOI:
- 10.1086/312191

The Cosmological Constant Problem

Steven Weinberg
(
- Texas U.
)

- Rev.Mod.Phys. 61 (1989) 1-23,
•
DOI:
- 10.1103/RevModPhys.61.1

The Case for a positive cosmological Lambda term

Varun Sahni
(
- IUCAA, Pune
)
,
Alexei A. Starobinsky
(
- Landau Inst.
)

- Int.J.Mod.Phys.D 9 (2000) 373-444
•
e-Print:
- astro-ph/9904398
•
DOI:
- 10.1142/S0218271800000542

A Solution to the Main Cosmological Problems

Murat Ozer
(
- King Saud U.
)
,
M.O. Taha
(
- King Saud U.
)

- Phys.Lett.B 171 (1986) 363-365
•
DOI:
- 10.1016/0370-2693(86)91421-8

A Model of the Universe with Time Dependent Cosmological Constant Free of Cosmological Problems

Murat Ozer
(
- King Saud U.
)
,
M.O. Taha
(
- King Saud U.
)

- Nucl.Phys.B 287 (1987) 776-796
•
DOI:
- 10.1016/0550-3213(87)90128-3

TIME DEPENDENT COSMOLOGICAL TERM

O. Bertolami
(
- Oxford U.
)

- Nuovo Cim.B 93 (1986) 36-42,
- Nuovo Cim. 93B ( 1986) 36-42
•
DOI:
- 10.1007/BF02728301

Cosmology with Decaying Vacuum Energy

Katherine Freese
(
- Santa Barbara, KITP
)
,
Fred C. Adams
(
- UC, Berkeley
)
,
Joshua A. Frieman
(
- SLAC
)
,
Emil Mottola
(
- Santa Barbara, KITP
)

- Nucl.Phys.B 287 (1987) 797-814
•
DOI:
- 10.1016/0550-3213(87)90129-5

Implications of a cosmological constant varying as R**(-2)

W. Chen
(
- Utah U.
)
,
Y.S. Wu
(
- Utah U.
)

- Phys.Rev.D 41 (1990) 695-698,
- Phys.Rev.D 45 (1992) 4728 (erratum)
•
DOI:
- 10.1103/PhysRevD.41.695

On the cosmological consequences of a time dependent lambda term

- Phys.Rev.D 46 (1992) 2404-2407
•
DOI:
- 10.1103/PhysRevD.46.2404

Thermodynamic constraints on a time dependent Lambda model

J.M. Salim
(
- Rio de Janeiro, CBPF and
- Rio de Janeiro Federal U.
)
,
I. Waga
(
- Rio de Janeiro, CBPF and
- Rio de Janeiro Federal U.
)

- Class.Quant.Grav. 10 (1993) 1767-1774
•
DOI:
- 10.1088/0264-9381/10/9/018

Decaying vacuum flat cosmological models: Expressions for some observable quantities and their properties

I. Waga
(
- Rio de Janeiro Federal U.
)

- Astrophys.J. 414 (1993) 436-448
•
DOI:
- 10.1086/173090

- Gen.Rel.Grav. 29 909

Cosmological models with a time dependent Lambda term

Jerzy Matyjasek
(
- Lublin, Curie U.
)

- Phys.Rev.D 51 (1995) 4154-4159
•
DOI:
- 10.1103/PhysRevD.51.4154

Nonminimal coupling and quintessence

O. Bertolami
(
- New York U.
)
,
P.J. Martins
(
- Lisbon, IST
)

- Phys.Rev.D 61 (2000) 064007
•
e-Print:
- gr-qc/9910056
•
DOI:
- 10.1103/PhysRevD.61.064007

Study of the magnitude redshift relation for type IA supernovae in a model resulting from a Ricci symmetry

R.G. Vishwakarma
(
- IUCAA, Pune
)

- Gen.Rel.Grav. 33 (2001) 1973-1984
•
e-Print:
- gr-qc/0106021
•
DOI:
- 10.1023/A:1013051026760

1-25 of 60
1
2
3
25 / page