Questão Q4595643 - Língua Inglesa

Question

The James Webb Space Telescope has just captured the first direct measurement of a black holeBy Space Daily Editorial The official ESA Webb announcement on 27 May 2026 and two papers report the firstdirect mass measurement of a supermassive black hole in the first billion years after the BigBang. The object sits at the heart of a small red galaxy called Abell2744-QSO1, seen as it wasroughly 700 million years after the Big Bang. The mass comes out at 50 million times the massof the Sun. The galaxy around it is so faint that the central object accounts for around two-thirdsof the total mass of the system and is more massive than all the stars in the galaxy combined.If the measurements hold, the implications run against the standard idea of how supermassiveblack holes form, which has the galaxy assembling first and the central black hole growing instep with it. QSO1 belongs to a class of objects called Little Red Dots, first identified by the JamesWebb Space Telescope (JWST) shortly after its commissioning in 2022. These are very compact,very red sources, common in the first billion years of cosmic history and almost entirely absentin the local universe. Previous mass estimates for black holes in the first billion years had reliedon indirect methods, mostly calibrated against scaling relations observed in the local universe.These methods give an answer but carry the assumption that the physics of black hole accretionin the distant past was broadly similar to what is observed nearby. According to Space.com’sreport on the work, D’Eugenio explained the team’s concern with that approach plainly: “Wedidn’t know if those assumptions really apply to the distant universe”. The galaxy itself contains relatively few stars. According to Universe Today’s coverage ofthe papers, the stellar mass is constrained to be below roughly 20 million solar masses, andsome analyses push the upper limit considerably lower. The black hole is therefore moremassive than all the stars in its galaxy combined, by at least a factor of two and possibly farmore. The authors note in the paper published in Nature that QSO1 sits about a factor of tenabove even the most extreme cases of black-hole-heavy galaxies previously identified by theJWST. The standard picture of supermassive black hole formation has the black hole growingalongside its host galaxy, in a feedback relationship that takes billions of years. QSO1 cannothave formed this way. The galaxy is too small to have fed the black hole through ordinaryaccretion, and the time elapsed since the Big Bang at the moment of observation is too shortfor slow co-evolution to have produced this result. The team’s preferred interpretation, presented as such rather than as a conclusion, isthat the black hole formed first and the galaxy is now assembling around it. Ignas Juodžbalis,one of the authors of the Nature paper, said that “This is very exciting because it is evidencefor primordial black holes or direct collapse black holes, which have been theorized but notconfirmed”. What the papers establish, in a narrower and more defensible sense, is that thestandard local scaling between black hole mass and host galaxy mass does not apply in thefirst billion years. Whether QSO1 is unusual among Little Red Dots, or whether the populationas a whole follows the same pattern, is the next question the Cambridge–Florence team ispursuing.(Available at: https://spacedaily.com/d-the-james-webb-space-telescope-has-just-captured-the-first-directmeasurement-of-a-black-hole-50-million-times-the-mass-of-the-sun-sitting-in-an-ancient-galaxy-where-itoutweighs-every-star-around-i/ – text specially adapted for this test). The James Webb Space Telescope has just captured the first direct measurement of a black holeBy Space Daily Editorial  The official ESA Webb announcement on 27 May 2026 and two papers report the firstdirect mass measurement of a supermassive black hole in the first billion years after the BigBang. The object sits at the heart of a small red galaxy called Abell2744-QSO1, seen as it wasroughly 700 million years after the Big Bang. The mass comes out at 50 million times the massof the Sun. The galaxy around it is so faint that the central object accounts for around two-thirdsof the total mass of the system and is more massive than all the stars in the galaxy combined.If the measurements hold, the implications run against the standard idea of how supermassiveblack holes form, which has the galaxy assembling first and the central black hole growing instep with it. QSO1 belongs to a class of objects called Little Red Dots, first identified by the JamesWebb Space Telescope (JWST) shortly after its commissioning in 2022. These are very compact,very red sources, common in the first billion years of cosmic history and almost entirely absentin the local universe. Previous mass estimates for black holes in the first billion years had reliedon indirect methods, mostly calibrated against scaling relations observed in the local universe.These methods give an answer but carry the assumption that the physics of black hole accretionin the distant past was broadly similar to what is observed nearby. According to Space.com’sreport on the work, D’Eugenio explained the team’s concern with that approach plainly: “Wedidn’t know if those assumptions really apply to the distant universe”. The galaxy itself contains relatively few stars. According to Universe Today’s coverage ofthe papers, the stellar mass is constrained to be below roughly 20 million solar masses, andsome analyses push the upper limit considerably lower. The black hole is therefore moremassive than all the stars in its galaxy combined, by at least a factor of two and possibly farmore. The authors note in the paper published in Nature that QSO1 sits about a factor of tenabove even the most extreme cases of black-hole-heavy galaxies previously identified by theJWST. The standard picture of supermassive black hole formation has the black hole growingalongside its host galaxy, in a feedback relationship that takes billions of years. QSO1 cannothave formed this way. The galaxy is too small to have fed the black hole through ordinaryaccretion, and the time elapsed since the Big Bang at the moment of observation is too shortfor slow co-evolution to have produced this result. The team’s preferred interpretation, presented as such rather than as a conclusion, isthat the black hole formed first and the galaxy is now assembling around it. Ignas Juodžbalis,one of the authors of the Nature paper, said that “This is very exciting because it is evidencefor primordial black holes or direct collapse black holes, which have been theorized but notconfirmed”. What the papers establish, in a narrower and more defensible sense, is that thestandard local scaling between black hole mass and host galaxy mass does not apply in thefirst billion years. Whether QSO1 is unusual among Little Red Dots, or whether the populationas a whole follows the same pattern, is the next question the Cambridge–Florence team ispursuing.(Available at: https://spacedaily.com/d-the-james-webb-space-telescope-has-just-captured-the-first-directmeasurement-of-a-black-hole-50-million-times-the-mass-of-the-sun-sitting-in-an-ancient-galaxy-where-itoutweighs-every-star-around-i/ – text specially adapted for this test). Mark the alternative in which the reflexive pronoun has the same grammatical function as in the sentence “The galaxy itself contains relatively few stars.” (l. 19).

Gran Questões · Accepted Answer

We want to meet the author herself, not her literary agent.

Gran Questões · Answer

She bought herself a new book.

Gran Questões · Answer

I looked at myself in the mirror and noticed the marks in my arm.

Gran Questões · Answer

He cut himself badly while cooking, so he will be away for a few days.

Mark the alternative in which the reflexive pronoun has the...