I think it would be more correct to say that this value has been measured. This is done by fitting a model, called the Lambda-CDM model to the measurements of the cosmic microwave background radiation. In the Wiki article this parameter is called t*. The most recent and accurate measurement of this parameter is from the Planck collaboration. You can read their paper at this link. Figure 1 on page 7 shows how well the model fits the data. The parameter z*, in Table 2 on page 15, basically gives this value, although you have to understand the model well enough to be able to convert from redshift to time to get the age. Do you have a working knowledge of modern cosmology? If not, you will probably not be able to follow the paper.mbond said:The age of the universe at the recombination is reported everywhere on the internet as 379,000 years.
I would be grateful if someone could point me towards the paper where this is calculated.
Recombination and reformation is a bit misleading. This the time when neutral atoms first formed and the universe became transparent.Mordred said:The epoch when neutral atoms start to reform.
Does your question mean how we got the age of the universe at recombination? If so, all you need is to integrate the parametrized Friedmann equation with the redshift of the recombination which is z = 1100. The integration will give you the age of the universe at that time(event).mbond said:where this is calculated
The Universe is estimated to be approximately 380,000 years old at the time of recombination. This marks the end of the "dark ages" and the beginning of the era of light in the Universe.
The recombination is a crucial event in the history of the Universe as it marks the formation of neutral atoms from free protons and electrons. This allowed the Universe to become transparent to light, making it possible for light to travel freely and for the first stars and galaxies to form.
The age of the Universe at recombination is calculated using a variety of methods, including measuring the cosmic microwave background radiation, the expansion rate of the Universe, and the abundance of elements. These methods are used to estimate the time it took for the Universe to reach its current state.
The age of the Universe at recombination has not changed significantly over time. However, as our understanding of the Universe and its components improves, the estimated age may be refined and adjusted. Currently, the most widely accepted estimate is 380,000 years.
No, we cannot observe the recombination event directly as it occurred over 13 billion years ago. However, we can indirectly observe its effects through the cosmic microwave background radiation, which is a remnant of the recombination event. This radiation provides valuable information about the early Universe and its age at recombination.