Probing the cosmic distance duality with strong gravitational lensing and supernovae Ia data
Creators
- 1. Departamento de Física, Universidade Estadual da Paraíba, 58429-500, Campina Grande PB (Brazil)
- 2. Departamento de Física Matemática, Instituto de Física, Universidade de São Paulo, CP 66318, CEP 05508-090, São Paulo SP (Brazil)
- 3. Departamento de Astronomia, Observatório Nacional, 20921-400, Rio de Janeiro RJ (Brazil)
Description
We propose and perform a new test of the cosmic distance-duality relation (CDDR), DL(z) / DA(z) (1 + z)2 = 1, where DA is the angular diameter distance and DL is the luminosity distance to a given source at redshift z, using strong gravitational lensing (SGL) and type Ia Supernovae (SNe Ia) data. We show that the ratio D=DA12/DA2 and D*=DL12/DL2, where the subscripts 1 and 2 correspond, respectively, to redshifts z1 and z2, are linked by D/D*=(1+z1)2 if the CDDR is valid. We allow departures from the CDDR by defining two functions for η(z1), which equals unity when the CDDR is valid. We find that combination of SGL and SNe Ia data favours no violation of the CDDR at 1σ confidence level (η(z) ≅ 1), in complete agreement with other tests and reinforcing the theoretical pillars of the CDDR
Availability note (English)
Available from http://dx.doi.org/10.1088/1475-7516/2016/02/054Additional details
Identifiers
Publishing Information
- Journal Title
- Journal of Cosmology and Astroparticle Physics
- Journal Volume
- 2016
- Journal Issue
- 02
- Journal Page Range
- p. 054
- ISSN
- 1475-7516
INIS
- Country of Publication
- United States
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 47095920
- Subject category
- S79: ASTROPHYSICS, COSMOLOGY AND ASTRONOMY;
- Descriptors DEI
- ASTROPHYSICS; DISTANCE; DUALITY; FUNCTIONS; GRAVITATIONAL LENSES; LUMINOSITY; PROBES; RED SHIFT; SUPERNOVAE
- Descriptors DEC
- BINARY STARS; ERUPTIVE VARIABLE STARS; LENSES; OPTICAL PROPERTIES; PHYSICAL PROPERTIES; PHYSICS; STARS; VARIABLE STARS