Universe opacity and Type Ia supernova dimming

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

Universe opacity and Type Ia supernova dimming

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

Universe opacity and Type Ia supernova dimming

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

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OECD FORD obor

10308 - Astronomy (including astrophysics,space science)

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2019

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Monthly Notices of the Royal Astronomical Society

ISSN

0035-8711

e-ISSN

—

Svazek periodika

489

Číslo periodika v rámci svazku

October

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

6

Strana od-do

"L63"-"L68"

Kód UT WoS článku

000491355100012

EID výsledku v databázi Scopus

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