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Webb telescope spots signs of universe’s biggest stars

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Webb telescope spots signs of universe's biggest stars

The James Webb Space Telescope has helped astronomers detect the first chemical signs of supermassive stars, ‘celestial monsters’ blazing with the brightness of millions of Suns in the early universe.

So far, the largest stars observed anywhere have a mass of around 300 times that of our Sun. But the supermassive star described in a new study has an estimated mass of 5,000 to 10,000 Suns.

The team of European researchers behind the study previously theorised the existence of supermassive stars in 2018 in an attempt to explain one of the great mysteries of astronomy.

For decades, astronomers have been baffled by the huge diversity in the composition of different stars packed into what are called globular clusters.
The clusters, which are mostly very old, can contain millions of stars in a relatively small space.

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Advances in astronomy have revealed an increasing number of globular clusters, which are thought to be a missing link between the universe’s first stars and first galaxies.

Our Milky Way galaxy, which has more than 100 billion stars, has around 180 globular clusters.

But the question remains: Why do the stars in these clusters have such a variety of chemical elements, despite presumably all being born around the same time, from the same cloud of gas?

Rampaging ‘seed star’

Many of the stars have elements that would require colossal amounts of heat to produce, such as aluminium which would need a temperature of up to 70 million degrees Celsius.

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That is far above the temperature that the stars are thought to get up to at their core, around the 15-20 million Celsius mark which is similar to the Sun.

So the researchers came up with a possible solution: a rampaging supermassive star shooting out chemical ‘pollution’. They theorise that these huge stars are born from successive collisions in the tightly packed globular clusters.

Corinne Charbonnel, an astrophysicist at the University of Geneva and lead author of the study, said that “a kind of seed star would engulf more and more stars”.

It would eventually become “like a huge nuclear reactor, continuously feeding on matter, which will eject out a lot of it,” she added.

This discarded ‘pollution’ will in turn feed young forming stars, giving them a greater variety of chemicals the closer they are to the supermassive star, she added. But the team still needed observations to back up their theory.

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‘Like finding a bone’

They found them in the galaxy GN-z11, which is more than 13 billion light years away — the light we see from it comes from just 440 million years after the Big Bang.

It was discovered by the Hubble Space Telescope in 2015, and until recently held the record of oldest observed galaxy. This made it an obvious early target for Hubble’s successor as most powerful space telescope, the James Webb, which started releasing its first observations last year.

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Microsoft to invest 2.2bn dollars in cloud and AI services in Malaysia

Microsoft to invest 2.2bn dollars in cloud and AI services in Malaysia

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Microsoft to invest 2.2bn dollars in cloud and AI services in Malaysia

Microsoft (MSFT.O) said on Thursday it will invest $2.2 billion over the next four years in Malaysia to expand cloud and artificial intelligence (AI) services in the company’s latest push to promote its generative AI technology in Asia.

The investment, the largest in Microsoft’s 32-year history in Malaysia, will include building cloud and AI infrastructure, creating AI-skilling opportunities for 200,000 people, and supporting the country’s developers, the company said.

“We want to make sure we have world class infrastructure right here in the country so that every organisation and start-up can benefit,” Microsoft Chief Executive Satya Nadella said during a visit to Kuala Lumpur.

Microsoft will also work with the Malaysian government to establish a national AI Centre of Excellence and enhance the nation’s cybersecurity capabilities, the company said in a statement.

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Prime Minister Anwar Ibrahim, who met Nadella on Thursday, said the investment supported Malaysia’s efforts in developing its AI capabilities.

Microsoft is trying to expand its support for the development of AI globally. Nadella this week announced a $1.7 billion investment in neighbouring Indonesia and said Microsoft would open its first regional data centre in Thailand.

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Nvidia supplier SK Hynix says HBM chips almost sold out for 2025

Nvidia supplier SK Hynix says HBM chips almost sold out for 2025

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Nvidia supplier SK Hynix says HBM chips almost sold out for 2025

South Korea’s SK Hynix (000660.KS) said on Thursday that its high-bandwidth memory (HBM) chips used in AI chipsets were sold out for this year and almost sold out for 2025 as businesses aggressively expand artificial intelligence services.

“The HBM market is expected to continue to grow as data and (AI) model sizes increase,” Chief Executive Officer Kwak Noh-Jung told a news conference. “Annual demand growth is expected to be about 60% in the mid-to long-term.”

SK Hynix which competes with U.S. rival Micron (MU.O) and domestic behemoth Samsung Electronics (005930.KS) in HBM was until March the sole supplier of HBM chips to Nvidia, according to analysts who add that major AI chip purchasers are keen to diversify their suppliers to better maintain operating margins. Nvidia commands some 80% of the AI chip market.

Micron has also said its HBM chips were sold out for 2024 and that the majority of its 2025 supply was already allocated. It plans to provide samples for its 12-layer HBM3E chips to customers in March.

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“As AI functions and performance are being upgraded faster than expected, customer demand for ultra-high-performance chips such as the 12-layer chips appear to be increasing faster than for 8-layer HBM3Es,” said Jeff Kim, head of research at KB Securities.

Samsung Electronics (005930.KS) which plans to produce its HBM3E 12-layer chips in the second quarter, said this week that this year’s shipments of HBM chips are expected to increase more than three-fold and it has completed supply discussions with customers. It did not elaborate further.

Last month, SK Hynix announced a $3.87 billion plan to build an advanced chip packaging plant in the U.S. state of Indiana with an HBM chip line and a 5.3 trillion won ($3.9 billion) investment in a new DRAM chip factory at home with a focus on HBMs.

Kwak said investment in HBM differed from past patterns in the memory chip industry in that capacity is being increased after making certain of demand first.

By 2028, the portion of chips made for AI, such as HBM and high-capacity DRAM modules, is expected to account for 61% of all memory volume in terms of value from about 5% in 2023, SK Hynix’s head of AI infrastructure Justin Kim said.

Last week, SK Hynix said in a post-earnings conference call that there may be a shortage of regular memory chips for smartphones, personal computers and network servers by the year’s end if demand for tech devices exceeds expectations.

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The Nvidia (NVDA.O) supplier and the world’s second-largest memory chipmaker will begin sending samples of its latest HBM chip, called the 12-layer HBM3E, in May and begin mass producing them in the third quarter.

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Qualcomm jumps as AI sparks rebound in Chinese smartphone market

Qualcomm jumps as AI sparks rebound in Chinese smartphone market

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Qualcomm jumps as AI sparks rebound in Chinese smartphone market

Qualcomm (QCOM.O) shares rose 4% in premarket trading on Thursday after the smartphone-focused chipmaker signaled an AI-fueled rebound in demand, especially in China, after a two-year slump.

Sales to Chinese smartphone makers jumped 40% in the first half of its fiscal year, the company said on Wednesday, as buyers there gravitate toward higher-priced devices that can accommodate AI chatbots.

“Chinese vendors who traditionally relied more on MediaTek, are going to start leveraging Qualcomm’s high-end chips more as they push hard into the AI Agenda,” said IDC analyst Nabila Popal.

“They further represent an upside for Qualcomm because majority of the recovery is also going to be driven by Chinese OEMs this year, coming from a tough last two years.”

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Qualcomm on Wednesday projected third-quarter sales that were above estimates as it also benefits from its IoT (Internet of things) and auto segments.

The company, the biggest supplier of smartphone chips, was on course to add more than $8 billion to its market value based on premarket movements. Other semiconductor firms such as Arm and Broadcom (AVGO.O) rose 2.8% and 2.4%, respectively.

According to preliminary data from research firm IDC, in the high-end segment, the AI buzz and the foldable products allowed the Android smartphone vendors to further differentiate themselves from Apple (AAPL.O) and garnered increased interest from Chinese consumers in the first quarter of 2024.

“We’re optimistic that numbers can be driven higher, given last year’s muted Android cycle and the likelihood of IoT(internet of things) improvement as inventory normalizes,” analysts at Wolfe Research said.

At least 14 analysts raised their price targets on Qualcomm, according to LSEG data.

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Qualcomm’s shares have gained 13.5% this year following a 31.5% rise in 2023.

Shares of Apple, which is set to report earnings after market closes on Thursday, were up 1.05% in premarket trading.

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