Electromagnetic Waves in Cosmological Space–Time II. Luminosity Distance
In this article, we continue our investigation on how the electromagnetic waves propagate in the Friedman–Lemaître–Robertson–Walker spacetime. Unlike the standard approach, which relies on null geodesics and geometric optics approximation, we derive explicit solutions for electromagnetic waves in ex...
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2025-02-01
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| author | Denitsa Staicova Michail Stoilov |
| author_facet | Denitsa Staicova Michail Stoilov |
| author_sort | Denitsa Staicova |
| collection | DOAJ |
| description | In this article, we continue our investigation on how the electromagnetic waves propagate in the Friedman–Lemaître–Robertson–Walker spacetime. Unlike the standard approach, which relies on null geodesics and geometric optics approximation, we derive explicit solutions for electromagnetic waves in expanding spacetime and examine their implications for cosmological observations. In particular, our analysis reveals potential modifications to the standard luminosity distance formula. Its effect on other cosmological parameters, e.g., the amount of cold dust matter in the Universe, is considered and estimated from Type Ia supernovae data. We see that this alternative model is able to fit the supernova data, but it gives a qualitatively different Universe without a cosmological constant but with stiff or ultra-stiff matter. |
| format | Article |
| id | doaj-art-4b9a7a9f6d8b4f6193b32ffe60b15c70 |
| institution | DOAJ |
| issn | 2218-1997 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Universe |
| spelling | doaj-art-4b9a7a9f6d8b4f6193b32ffe60b15c702025-08-20T03:12:04ZengMDPI AGUniverse2218-19972025-02-011125010.3390/universe11020050Electromagnetic Waves in Cosmological Space–Time II. Luminosity DistanceDenitsa Staicova0Michail Stoilov1Institute for Nuclear Research and Nuclear Energy, Bulgarian Academy of Sciences, 72 Tszarigradsko Chaussee, 1784 Sofia, BulgariaInstitute for Nuclear Research and Nuclear Energy, Bulgarian Academy of Sciences, 72 Tszarigradsko Chaussee, 1784 Sofia, BulgariaIn this article, we continue our investigation on how the electromagnetic waves propagate in the Friedman–Lemaître–Robertson–Walker spacetime. Unlike the standard approach, which relies on null geodesics and geometric optics approximation, we derive explicit solutions for electromagnetic waves in expanding spacetime and examine their implications for cosmological observations. In particular, our analysis reveals potential modifications to the standard luminosity distance formula. Its effect on other cosmological parameters, e.g., the amount of cold dust matter in the Universe, is considered and estimated from Type Ia supernovae data. We see that this alternative model is able to fit the supernova data, but it gives a qualitatively different Universe without a cosmological constant but with stiff or ultra-stiff matter.https://www.mdpi.com/2218-1997/11/2/50electromagnetic wavesFriedman–Lemaître–Robertson–Walker spacetimeluminosity distancesupernovae data fit |
| spellingShingle | Denitsa Staicova Michail Stoilov Electromagnetic Waves in Cosmological Space–Time II. Luminosity Distance Universe electromagnetic waves Friedman–Lemaître–Robertson–Walker spacetime luminosity distance supernovae data fit |
| title | Electromagnetic Waves in Cosmological Space–Time II. Luminosity Distance |
| title_full | Electromagnetic Waves in Cosmological Space–Time II. Luminosity Distance |
| title_fullStr | Electromagnetic Waves in Cosmological Space–Time II. Luminosity Distance |
| title_full_unstemmed | Electromagnetic Waves in Cosmological Space–Time II. Luminosity Distance |
| title_short | Electromagnetic Waves in Cosmological Space–Time II. Luminosity Distance |
| title_sort | electromagnetic waves in cosmological space time ii luminosity distance |
| topic | electromagnetic waves Friedman–Lemaître–Robertson–Walker spacetime luminosity distance supernovae data fit |
| url | https://www.mdpi.com/2218-1997/11/2/50 |
| work_keys_str_mv | AT denitsastaicova electromagneticwavesincosmologicalspacetimeiiluminositydistance AT michailstoilov electromagneticwavesincosmologicalspacetimeiiluminositydistance |