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Suekdccia
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- TL;DR Summary
- Internal energy of a comoving volume increasing as space expands?
I was reading an article by Edward Harrison, which tackles the problems of conservation of energy at cosmological scales.
At some part (point 2.4) he cites several article, including one by Rees and Gott, which he says indicates that the internal energy of a comoving volume (e.g. a cosmic string) increases as the universe expands. However, since cosmic strings are hypothetical objects, I'm not sure if this conclusion is true. Could thus be possible for any kind of known comoving volume (I mean, does this apply to any kind of structure or volume that has been observed or experimentally verified)?
Link to the article: https://adsabs.harvard.edu/full/1995ApJ...446...63H
At some part (point 2.4) he cites several article, including one by Rees and Gott, which he says indicates that the internal energy of a comoving volume (e.g. a cosmic string) increases as the universe expands. However, since cosmic strings are hypothetical objects, I'm not sure if this conclusion is true. Could thus be possible for any kind of known comoving volume (I mean, does this apply to any kind of structure or volume that has been observed or experimentally verified)?
Link to the article: https://adsabs.harvard.edu/full/1995ApJ...446...63H