Tijd voor- en zin in wat kosmos? Ja?
Beginnen we bij het begin. Het sciencemag-artikel dat prikkelde,
https://science.sciencemag.org/content/365/6453/565 – ‘A single fast radio burst localized to a massive galaxy at cosmological distance’
Daar word je helaas niet veel wijzer. Bij waar het op slaat, een fors researchgate.net artikel uit juni, wel,
Abstract
Fast Radio Bursts (FRBs) are brief radio emissions from distant astronomical sources. Some are known to repeat, but most are single bursts. Non-repeating FRB observations have had insufficient positional accuracy to localize them to an individual host galaxy. We report the interferometric localization of the single pulse FRB 180924 to a position 4 kpc from the center of a luminous galaxy at redshift 0.3214. The burst has not been observed to repeat. The properties of the burst and its host are markedly different from the only other accurately localized FRB source. The integrated electron column density along the line of sight closely matches models of the intergalactic medium, indicating that some FRBs are clean probes of the baryonic component of the cosmic web.Cosmological observations have shown that baryons comprise 4% of the energy density of the Universe, of which only about 10% is in cold gas and stars (1), with the remainder residing in a diffuse plasma surrounding and in between galaxies and galaxy clusters. The location and density of this material has been challenging to characterize, and up to 50% of it remains unaccounted (2)
Tenzij je ook engelstalig deskundig bent, is er meer nodig om er hout van te kunnen snijden. Op de uiteraard prangende vraag of ze bij SETI een stijve kregen van het snelle radiopuls nieuws, is het antwoord: “Vast wel”.
Ter verdere kennisneming&vergaring
https://wetenschap.infonu.nl/sterrenkunde/133418-afstanden-berekenen-in-de-sterrenkunde-en-kosmologie.html
https://en.wikipedia.org/wiki/Distance_measures_(cosmology) -voor gevorderden
https://nl.wikipedia.org/wiki/Radioastronomie
https://nl.wikipedia.org/wiki/Fast_Radio_Burst – FRBs
https://nl.wikipedia.org/wiki/Baryon
http://frbcat.org/ – alle FRBs in kaart gebracht
