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For the First Time Astronomers Watch a Black Hole 'Wake Up' in Real-Time

2 months 3 weeks ago
Black holes "often exhibit long periods of dormancy," writes Popular Science, adding that astronomers had never witnessed a black hole "wake up" in real time. "Until now..." In February of 2024 X-ray bursts were spotted coming out of a black hole named Ansky by Lorena Hernández-García at Chile's Valparaiso University, according to the article. And what astronomers have now seen "challenges prevailing theories about black hole lifecycles." Hernández-García and collaborators then determined the black hole was displaying a phenomenon known as a quasiperiodic eruption, or QPE [a short-lived flaring event...] While a black hole inevitably destroys everything it captures, objects behave differently during their impending demise. A star, for example, generally stretches apart into a bright, hot, fast-spinning disc known as an accretion disc. Most astronomers have theorized that black holes generate QPEs when a comparatively small object like a star or even a smaller black hole collides with an accretion disc. In the case of Ansky, however, there isn't any evidence linking it to the death of a star. "The bursts of X-rays from Ansky are ten times longer and ten times more luminous than what we see from a typical QPE," said MIT PhD student and study co-author Joheen Chakraborty. "Each of these eruptions is releasing a hundred times more energy than we have seen elsewhere. Ansky's eruptions also show the longest cadence ever observed, of about 4.5 days." Astronomers must now consider other explanations for Ansky's remarkable behavior. One theory posits that the accretion disc could come from nearby galactic gas pulled in by the black hole instead of a star. If true, then the X-rays may originate from high energy shocks to the disc caused by a small cosmic object repeatedly passing through and disrupting orbital matter. It's detailed in a study published on April 11 in Nature Astronomy.... Meanwhile, scientists "have uncovered the strongest evidence yet for the existence of elusive intermediate-mass black holes," reports SciTechDaily. And there's more black hole news from RockDoctor (Slashdot reader #15,477): Given the recent work on galaxy-centre Super-Massive Black Holes (SMBHs), you may be surprised to learn that the only Stellar-Mass Black Holes (SMBHs ... uh, "BHs") identified to-date have been by their gravitational waves, as they merge with another BH or a neutron star. But the long-running OGLE (Optical Gravitational Lensing Experiment) project (1992 — present) has recently confirmed that it has detected an isolated BH not orbiting another bright object, or "swallowing" much of anything... In this case, 16 other telescopes performed sensitive astrometry (position measurement) over 11 years including the Hubble Space Telescope (HST). These multiple measurements plot an ellipse on the sky, mirroring the movement of the Earth around it's orbit — parallax. Which means this is a relatively close object (1520 parsecs / ~5000 light years).... And there is no sign of a third light emitting body nearby, which means this is an isolated black hole, not orbiting any other body (or, indeed, with any other [small] star orbiting it).

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EditorDavid

Microsoft total recalls Recall totally to Copilot+ PCs

2 months 3 weeks ago
Redmond hopes you’ve forgotten or got over why everyone hated it the first time

After temporarily shelving its controversial Windows Recall feature amid a wave of backlash, Microsoft is back at it - now quietly slipping the screenshotting app into the Windows 11 Release Preview channel for Copilot+ PCs, signaling its near-readiness for general availability.…

Iain Thomson

Germany's 'Universal Basic Income' Experiment Proves It Doesn't Encourage Unmployment

2 months 3 weeks ago
People "are likely to continue working full-time even if they receive no-strings-attached universal basic income payments," reports CNN, citing results from a recent experiment in Germany (discussed on Slashdot in 2020): Mein Grundeinkommen (My Basic Income), the Berlin-based non-profit that ran the German study, followed 122 people for three years. From June 2021 to May 2024, this group received an unconditional sum of €1,200 ($1,365) per month. The study focused on people aged between 21 and 40 who lived alone and already earned between 1,100 euros (around $1,250) and 2,600 euros ($2,950) a month. They were free to use the extra money from the study on anything they wanted. Over the course of three years, the only condition was that they had to fill out a questionnaire every six months that asked about different areas of their lives, including their financial situation, work patterns, mental well-being and social engagement. One concern voiced by critics is that receiving a basic income could make people less inclined to work. But the Grundeinkommen study suggests that may not be the case at all. It found that receiving a basic income was not a reason for people to quit their jobs. On average, study participants worked 40 hours a week and stayed in employment — identical to the study's control group, which received no payment. "We find no evidence that people love doing nothing," Susann Fiedler, a professor at the Vienna University of Economics and Business who was involved with the study, said on the study's website. Unlike the control group, those receiving a basic income were more likely to change jobs or enroll in further education. They reported greater satisfaction in their working life — and were "significantly" more satisfied with their income... And can more money buy happiness? According to the study, the recipients of a basic income reported feeling that their lives were "more valuable and meaningful" and felt a clear improvement in their mental health.

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EditorDavid

AI Industry Tells US Congress: 'We Need Energy'

2 months 3 weeks ago
The Washington Post reports: The United States urgently needs more energy to fuel an artificial intelligence race with China that the country can't afford to lose, industry leaders told lawmakers at a House hearing on Wednesday. "We need energy in all forms," said Eric Schmidt, former CEO of Google, who now leads the Special Competitive Studies Project, a think tank focused on technology and security. "Renewable, nonrenewable, whatever. It needs to be there, and it needs to be there quickly." It was a nearly unanimous sentiment at the four-hour-plus hearing of the House Energy and Commerce Committee, which revealed bipartisan support for ramping up U.S. energy production to meet skyrocketing demand for energy-thirsty AI data centers. The hearing showed how the country's AI policy priorities have changed under President Donald Trump. President Joe Biden's wide-ranging 2023 executive order on AI had sought to balance the technology's potential rewards with the risks it poses to workers, civil rights and national security. Trump rescinded that order within days of taking office, saying its "onerous" requirements would "threaten American technological leadership...." [Data center power consumption] is already straining power grids, as residential consumers compete with data centers that can use as much electricity as an entire city. And those energy demands are projected to grow dramatically in the coming years... [Former Google CEO Eric] Schmidt, whom the committee's Republicans called as a witness on Wednesday, told [committee chairman Brett] Guthrie that winning the AI race is too important to let environmental considerations get in the way... Once the United States beats China to develop superintelligence, Schmidt said, AI will solve the climate crisis. And if it doesn't, he went on, China will become the world's sole superpower. (Schmidt's view that AI will become superintelligent within a decade is controversial among experts, some of whom predict the technology will remain limited by fundamental shortcomings in its ability to plan and reason.) The industry's wish list also included "light touch" federal regulation, high-skill immigration and continued subsidies for chip development. Alexandr Wang, the young billionaire CEO of San Francisco-based Scale AI, said a growing patchwork of state privacy laws is hampering AI companies' access to the data needed to train their models. He called for a federal privacy law that would preempt state regulations and prioritize innovation. Some committee Democrats argued that cuts to scientific research and renewable energy will actually hamper America's AI competitiveness, according to the article. " But few questioned the premise that the U.S. is locked in an existential struggle with China for AI supremacy. "That stark outlook has nearly coalesced into a consensus on Capitol Hill since China's DeepSeek chatbot stunned the AI industry with its reasoning skills earlier this year."

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EditorDavid

Microsoft is Killing Skype - and Refusing Refunds for Prepaid International Calls

2 months 3 weeks ago
Skype is shutting down after two decades on May 5th, notes the Washington Post. But the bigger problem for retired attorney Karen Griffin is that Microsoft won't refund the money they paid into a Skype account for cheap international phone calls: "They're no longer offering this service that I prepaid for, and now they're not giving me my money back," Griffin said. "There's a lot of people out there who are going to lose money...." To its credit, Microsoft gave Skype users a couple months' warning about the shutdown coming May 5. People can transfer Skype contacts and chat history to the company's Microsoft Teams chat-and-calling app or to other companies' services. (While Microsoft sells Teams to organizations, there's a free version for personal use.) But Microsoft didn't explain well what will happen to money that people like Griffin have parked in Skype accounts, in some cases for years.... Unless you bought Skype credits very recently, Microsoft said it won't refund money in Skype accounts. The company says it will add an option for Skype account holders to keep using their funds for phone calls online or in Teams. Griffin doesn't love what Microsoft is doing. She prefers a cash refund or a credit applied to her Microsoft Office subscription, for which she pays about $110 a year. Amit Fulay, vice president of product for Skype and Teams, said it's not possible to shift funds from a Skype account to Office subscriptions. And he nixed refunds because Microsoft will still offer basic call services for former Skype customers. "Refunds make more sense if you took away something," Fulay said. "We're not." Microsoft declined to say how much money Skype users collectively have sitting in accounts that they might never use. Stacey Higginbotham, a policy specialist with Consumer Reports' technology advocacy team, said Griffin is making a reasonable request for a rich company like Microsoft that's shutting down an internet service. "The best way: Give people their money back. The second-best way, give people a credit to all of your services," Higginbotham said.

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EditorDavid