Universe opacity and Type Ia supernova dimming

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985530%3A_____%2F19%3A00509007" target="_blank" >RIV/67985530:_____/19:00509007 - isvavai.cz</a>
Result on the web
<a href="https://academic.oup.com/mnrasl/article/489/1/L63/5551485" target="_blank" >https://academic.oup.com/mnrasl/article/489/1/L63/5551485</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1093/mnrasl/slz128" target="_blank" >10.1093/mnrasl/slz128</a>

Result language
angličtina
Original language name
Universe opacity and Type Ia supernova dimming
Original language description
In this paper, I revoke a debate about an origin of Type Ia supernova (SN Ia) dimming. I argue that except for a commonly accepted accelerating expansion of the Universe, a conceivable alternative for explaining this observation is universe opacity caused by light extinction by intergalactic dust, even though it is commonly assumed that this effect is negligible. Using data of the Union2.1 SN Ia compilation, I find that the standard Lambda cold dark matter (Lambda CDM) model and the opaque universe model fit the SN Ia measurements at redshifts z < 1.4 comparably well. The optimum solution for the opaque universe model is characterized by the B-band intergalactic opacity lambda(B) = 0.10 +/- 0.03 Gpc(-1) and the Hubble constant H-0 = 68.0 +/- 2.5 kms(-1) Mpc(-1). The intergalactic opacity is higher than that obtained from independent observations but still within acceptable limits. This result emphasizes that the issue of the accelerating expansion of the Universe as the origin of the SN Ia dimming is not yet definitely resolved. Obviously, the opaque universe model as an alternative to the Lambda CDM model is attractive, because it avoids puzzles and controversies associated with dark energy and the accelerating expansion.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10308 - Astronomy (including astrophysics,space science)

Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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