The failure of testing for cosmic opacity via the distance-duality relation

0531283 - GFÚ 2021 RIV GB eng J - Článek v odborném periodiku
Vavryčuk, Václav - Kroupa, P.
The failure of testing for cosmic opacity via the distance-duality relation.
Monthly Notices of the Royal Astronomical Society. Roč. 497, č. 1 (2020), s. 378-388. ISSN 0035-8711. E-ISSN 1365-2966
Institucionální podpora: RVO:67985530
Klíčová slova: gravitational lensing * intergalactic medium * dark energy
Obor OECD: Astronomy (including astrophysics,space science)
Impakt faktor: 5.287, rok: 2020
Způsob publikování: Open access
https://academic.oup.com/mnras/article/497/1/378/5867784

The distance-duality relation (DDR) between the luminosity distance D-L and the angular diameter distance D-A is viewed as a powerful tool for testing for the opacity of the Universe, being independent of any cosmological model. It was applied by many authors, who mostly confirm its validity and report a negligible opacity of the Universe. Nevertheless, a thorough analysis reveals that applying the DDR in cosmic opacity tests is tricky. Its applicability is strongly limited because of a non-unique interpretation of the D-L data in terms of cosmic opacity and a rather low accuracy and deficient extent of currently available D-A data. Moreover, authors usually assume that cosmic opacity is frequency independent and parametrize it in their tests by a prescribed phenomenological function. In this way, they only prove that cosmic opacity does not follow their assumptions. As a consequence, no convincing evidence of transparency of the universe using the DDR has so far been presented.
Trvalý link: http://hdl.handle.net/11104/0309971