Pseudo-evolution of galaxies in Lambda CDM cosmology

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F19%3A10406401" target="_blank" >RIV/00216208:11320/19:10406401 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=~Aw8gW1Vby" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=~Aw8gW1Vby</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1093/mnras/stz2027" target="_blank" >10.1093/mnras/stz2027</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Pseudo-evolution of galaxies in Lambda CDM cosmology

Popis výsledku v původním jazyce

Our knowledge about galaxy evolution comes from transforming observed galaxy properties at different redshifts to comoving physical scales. This transformation depends on using a cosmological model. Here, the effects of unintentional mixing of two different cosmological models on the size evolution of galaxies is studied. As a gedanken experiment, a galaxy of fixed proper size and luminosity is moved across different redshifts. The apparent size of this galaxy is then interpreted with a cosmological model presumed by the observer, which is different compared to the cosmology exhibited by the Universe. in such a case, a spurious size evolution of the galaxy is observed. A galaxy behaving according to the R-h = ct and Neumann&apos;s cosmology, when interpreted with the Lambda cold dark matter (Lambda CDM) cosmological model, shows an increase in size by a factor of 1.1 and 1,3 from z = 7.5 to approximate to 0, respectively. The apparent size of a galaxy in a static Euclidean cosmology, when interpreted in the Lambda CDM model, shows a factor of 23,8 increase in size between z = 7.5 to approximate to 0. This is ill close agreement with the observational data with a size increase of a factor of 6.8 between z = 3.2 to approximate to 0, Furthermore, using the apparent size data, it is shown that the difference between the derived proper sizes in R-h = ct, Neumann&apos;s and Lambda CDM cosmological models are minimal.

Název v anglickém jazyce

Pseudo-evolution of galaxies in Lambda CDM cosmology

Popis výsledku anglicky

Our knowledge about galaxy evolution comes from transforming observed galaxy properties at different redshifts to comoving physical scales. This transformation depends on using a cosmological model. Here, the effects of unintentional mixing of two different cosmological models on the size evolution of galaxies is studied. As a gedanken experiment, a galaxy of fixed proper size and luminosity is moved across different redshifts. The apparent size of this galaxy is then interpreted with a cosmological model presumed by the observer, which is different compared to the cosmology exhibited by the Universe. in such a case, a spurious size evolution of the galaxy is observed. A galaxy behaving according to the R-h = ct and Neumann&apos;s cosmology, when interpreted with the Lambda cold dark matter (Lambda CDM) cosmological model, shows an increase in size by a factor of 1.1 and 1,3 from z = 7.5 to approximate to 0, respectively. The apparent size of a galaxy in a static Euclidean cosmology, when interpreted in the Lambda CDM model, shows a factor of 23,8 increase in size between z = 7.5 to approximate to 0. This is ill close agreement with the observational data with a size increase of a factor of 6.8 between z = 3.2 to approximate to 0, Furthermore, using the apparent size data, it is shown that the difference between the derived proper sizes in R-h = ct, Neumann&apos;s and Lambda CDM cosmological models are minimal.

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

488

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

8

Strana od-do

3876-3883

Kód UT WoS článku

000485158400066

EID výsledku v databázi Scopus

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