Fischer v. United States – A Tale of Two Readings: All May Not Be What It Seems

Martin Mull, Acerbic Comedian and Actor, Dead at 80

The Flavian Dynasty ruled the Roman Empire from 69 to 96 AD, leaving a notable impact through significant events and leadership. Vespasian, the dynasty's founder, initially governed via his son Domitian and Mucianus while he was in Egypt. Mucianus focused on repairing the empire's finances through heavy taxation, a policy Vespasian continued despite widespread rebellions. A Turbulent Tide Turns In Favor of the Flavian Dynasty Why Was Emperor Domitian Hated by the Elite but Loved by the People? Vespasian faced challenges, including revolts in Judea and Gaul. He launched a propaganda campaign to solidify his authority, distributing gifts and emphasizing his military successes. Despite numerous conspiracies against him, Vespasian managed to survive until his death from illness in 79 AD. His son, Titus, succeeded him. Although initially feared to be another tyrannical ruler like Caligula or Nero, Titus quickly gained public approval. His reign saw the completion of the Colosseum and other construction projects but was marked by disasters such as the eruption of Mount Vesuvius and a major fire in Rome. Titus's reign was short-lived, ending with his death from illness, though some speculate he was poisoned by his brother, Domitian. Read moreSection: NewsVideosHistoryFamous PeopleRead Later 

Beryl strengthened into a hurricane on Saturday as it churned toward the southeast Caribbean, with forecasters warning it was expected to become a dangerous and major storm before reaching Barbados late Sunday or early Monday.

The early Universe is a puzzling and—in many ways—still-unknown place. The first billion years of cosmic history saw the explosive creation of stars and the growth of the first galaxies. It’s also a time when the earliest known black holes appeared to grow very massive quickly. Astronomers want to know how they grew and why they feed more like “normal” recent supermassive black holes (SMBH). Today we see SMBH in galaxies that can have upwards of millions or billions of solar masses sequestered away. Astronomers naturally assumed that it took a long time for such monsters to build up. Like billions of years. So, when JWST observed the most distant quasar J1120+0641, they expected to see an active galactic nucleus as it looked some 770 million years after the Big Bang. That is, they expected a still-growing central supermassive black hole. They were intrigued to find that it had a mass of at least a billion suns. This image of ULAS J1120+0641, a very distant quasar powered by a black hole, was created from images taken from surveys made by both the Sloan Digital Sky Survey and the UKIRT Infrared Deep Sky Survey. The quasar appears as a faint red dot close to the center. It’s the most distant yet found, seen as it was 770 million years after the Big Bang. That raised a question: how could such an early SMBH get so big so fast? For something that young, having that much mass says something about its feeding mechanism. Astronomers already know that SMBH existed early in cosmic time. These structures at the hearts of those distant quasars apparently already existed when the Universe was very young—about 5% of its current age. Theory vs Observation: How Do Supermassive Black Holes Form? The growth of SMBH in the early Universe is a hot topic these days. The standard idea for a long time was that they grew slowly through mergers and acquisitions during galaxy formation. Since those mergers take a long time—millions of years, at least—it seemed that the black holes would go along for the long, slow ride. And, you can’t speed up black hole growth too much once one forms. As matter swirls into the black hole, it does so through the accretion disk that feeds it. The disk—the active galactic nucleus—is very bright due to the radiation emitted as the matter heats up through friction and magnetic field interactions. The light pressure pushes stuff away. That limits how quickly the black hole can eat. Still, astronomers found these early SMBH sporting 10 billion solar masses when, by conventional wisdom, they should have been less massive. For J1120+0641, astronomers considered different scenarios for its growth, including a so-called “ultra-effective feeding mode”. That implies early SMBH had some very efficient way of accreting gas and dust and other material. So, astronomers looked at these active galactic nuclei at the hearts of distant quasars in more detail using JWST. It has the MIRI spectrograph that looks at the light from those quasars in great detail. The MIRI spectra of J1120+0641 revealed the presence of a large dust torus (a donut-shaped ring) surrounding the accretion disk of the SMBH. That disk is feeding the SMBH at a very “normal” rate similar to SMBH in the “modern” Universe. The quasar’s broad-line region, where clumps of gas orbit the black hole at speeds near the speed of light look normal, too. Artist’s interpretation of ULAS J1120+0641, a very distant quasar with a supermassive black hole at its heart. Credit: ESO/M. Kornmesser In the Final Analysis By almost all the properties that can be deduced from the spectrum, J1120+0641 turns out to be feeding no differently than quasars at later times. So, what does that mean for theories of SMBH formation in the early Universe? According to Sarah Bosman, who headed up the team that used JWST to study this and other quasars, the observations rule out fast feeding and other explanations for why the SMBH is so massive. “Overall, the new observations only add to the mystery: early quasars were shockingly normal. No matter in which wavelengths we observe them, quasars are nearly identical at all epochs of the Universe,” she said. If you extrapolate these observations to other ideas about early SMBH, it means the process of black hole growth was pretty much set early in cosmic history. They didn’t start as stellar-mass black holes that got big. Instead, they formed from the collapse of very massive early clouds of gas to become massive primordial seeds. From there, not only did they feed from their accretion disks, but probably did grow even more massive through those mergers and acquisitions. Thanks to JWST, however, astronomers now know that the early feeding mechanisms were already in place very early in cosmic time. Now they just need to figure out when the primordial seeds of SMBH first appeared in the infant Universe. For More Information A Black Hole of Inexplicable MassA Mature Quasar at Cosmic Dawn Revealed by JWST Rest-frame Infrared SpectroscopyFirst rest-frame Infrared Spectrum of a Z > 7 Quasar: JWST/MRS Observations of J1120+0641 The post Earliest Supermassive Black Holes Were “Shockingly Normal” appeared first on Universe Today.

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Bridging the Political Divide – Finding Common Ground in Today’s America [VIDEO]