Therefore,
James-webb telescope discovered legendary stars:
Abraham Loeb. Meanwhile, you Harvard and Smithsonian Center for Astrophysicsmade itself known to the general public in recent years with its propensity to believe that our solar system is regularly visited by interstellar probes of civilizations and, some can have been disappeared for millions of years. Meanwhile, For the majority of his colleagues. Therefore, he thus discredited himself, because they only see in the examples examined by Loeb than natural objects, such as the famous’ Oumamua, for example.
But Avi Loeb remains a prolific. Consequently, much less controversial researcher in other areas of astrophysics, as shown again an article with free access on arXiv Written with his colleague DevaSh Nandal, from the Astronomy Department of the University of Virginia. Moreover, The two researchers exhibit their work on a discovery of the James-Webb space telescope (JWST) which makes the astrophysicistsastrophysicists. james-webb telescope discovered legendary stars Therefore, cosmologists, the famous Little Red Dots (Lrd).
These are more than 300 objects observed in the infrared. Similarly, but as they were about 600 million years after the Big BangBig Bang. Similarly, It must be large, particularly bright stars. Additionally, Similarly, The first theoretical interpretations suggested on the one hand. For example, that these stars were surrounded by cloudsclouds of gazgaz and dust (hence their colorcolor abnormally red) and on the other hand, that it was probably Supermassive black holesSupermassive black holes accreating mattermatter in the heart of galaxiesgalaxieslike the quasarsquasars.
Population stars III and not black holes?
Only here. Meanwhile, it would james-webb telescope discovered legendary stars be necessary to admit that such objects in large galaxies have formed in large numbers early in the history of cosmoscosmos observable, which does not necessarily seem compatible with the standard cosmological modelstandard cosmological model With dark matter, even if no one knows nothing about it.
This story of early galaxies, too early, is not fundamentally new. Meanwhile, Already in the time of Hubble. For example, the VLTVLT fromTHATTHATthe cosmologists wondered about the meaning of the large galaxies which they discovered about one to two billion years after the Big Bang. Furthermore, It turned out to be for the latter that refinements of digital simulationsdigital. Therefore, simulations Galaxies training could account for the problematic objects discovered by Hubble. Quid of those james-webb telescope discovered legendary stars of the JWST and in particular LRDs?
The fact remains that Loeb. Nandal offer today that LRDs are nothing less than starsstars of populations IIIpopulations III directly under our eyeseyesand not just any of these legendary stars, which would be the first to be born in theUniverseUniverse At the end of dark agesdark ages A few hundred million years after the Big Bang, but supermassive stars just as legendary in themselves.
According to the two researchers. the spectresspectres that they have modeled for these stars that could contain a million massesmasses solar and devoid of elements heavier than the lithiumlithium (so very low metacicitymetacicityas astrophysicists say in their jargon) are in perfect agreement with the observations of the JWST. On the contrarywe do not understand why. in the event that LRDs are black holes supermassive, why as in the case of active nuclei of current galaxies which contain them, we do not observeprogramsprograms of X -raysX -raysnor variability of brightnessbrightness.
More than 10 years ago. using ESO instruments, astrophysicists discovered an old quasar whose black hole already contained two billion solar masses. This Quasar, called Ulas J1120+0641, is observed as it was only 770 million years after the Big Bang. To obtain a fairly faithful French translation, click on the white rectangle at the bottom right. Subtitles in English should then appear. Then click on the nut to the right of james-webb telescope discovered legendary stars the rectangle, then on “Subtitles” and finally on “Translate automatically”. Choose “French”. © European Southern Observatory (THAT)
James-webb telescope discovered legendary stars
The supermassive stars, a saga for more than half a century!
However. if the LRDs are many supermassive stars, they are necessarily unstable, as Chandrasekhar and Richard Feynman showed in the early 1960s, and must collapse gravitational by giving giant black holes that might be the germsgerms Supermassive black holes. Indeed. such objects would then massively swallow gas, in particular via the famous cold currents, and would also coales fusionfusion of galaxies.
Anyway. the story of the supermassive stars is interesting and the theoretical saga about them has continued since the early 1960s, when they were postulated in 1963 by Fred Hoyle and William Fowler, well known for their work with Burbidges on the nucleosynthesisnucleosynthesis stellar.
It was for the two men to explain the astonishing observations concerning the Quasars which had just appeared in astrophysics. The intrinsic brightness of these objects seemed difficult to admit given their spectral gap towards the red which indicated. that they were very distant. Prodigious quantities ofenergyenergy had to be released every second. it was not possible to account for it from thermonuclear merger reactions.
It was then more intellectually comfortable to suppose the existence ofgiant starsgiant stars close to the Milky WayMilky Wayeven in our galaxy. but with a field of gravitationgravitation so high that he produced the important spectral lag to the red observed – an effect predicted by EinsteinEinstein as part of his theory of general relativitygeneral relativity. This hypothesis also helped the creation of relativistic astrophysics. because such stars must necessarily be subject to significant effects of the physiquephysique of Einstein concerning the gravitation field.
In this relativistic framework. which dates back to the early 1960s with the works of Hoyle, Chandrasekhar, Salpeter and Zel’dovich to name only them, the investigations continued by assuming, in 1964, that the Quasars were very distant objects but rather black holes in rotation.
Did you know?
About 50 years ago. the occultation technique made it possible to determine the counterpart in the visible of what was then only an astonishing powerful radio source, 3C 273. When Maarten Schmidt. a Dutch astronomer, then made the spectral analysis of the light of the star always in the james-webb telescope discovered legendary stars visible, he discovered with amazement lines of hydrogen strongly offset towards red. However. 3C 273 appeared in the visible as a star, while this result implied that it is located outside the Milky Way at a cosmological distance.
To be observable from so far, the object must therefore be of prodigious brightness. Other quasi-stellars Radio Sources. quasars according to the name proposed in 1964 by the astrophysicist of Chinese origin Hong-Yee Chiu, were soon discovered. We know more than 200,000 today.
The astrophysicists very early sought to understand the nature of these stars which. although releasing huge amounts of energy, seemed to be small. We first thought that it could be enormous stars dominated by the effects of general relativity. in particular responsible for the spectral gap, before considering fairly quickly that it could be black holes supermassifs accreating large quantities of gas.
In the bestiary of the relativistic stars that we started james-webb telescope discovered legendary stars to explore seriously during the 1960s. some, like the Russian Igor Novikov and the Israeli Yuval Ne’eman, even proposed that the Quasars were in fact white holes. That is to say either regions of the universe whose expansion at the time of the Big Bang had been delayed (hypothesis of lagging core). either the other end of ejecting worm holes the material they had absorbed in the form of black holes in another part of the cosmos, even in another universe.
James-webb telescope discovered legendary stars
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