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Findings from IXPE Data Reveal Key Insights on Corona Around Black Holes

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WASHINGTON, Nov. 22, 2024 /PRNewswire/ — Groundbreaking research using data from NASA’s Imaging X-ray Polarimetry Explorer (IXPE) mission has revealed new insights into the shape and properties of a black hole’s corona, a key structure surrounding black holes. Led by Universities Space Research Association’s (USRA) postdoctoral researcher, Lynnie Saade, at USRA’s Science and Technology Institute, these findings were recently published in The Astrophysical Journal and represent a significant advance in our understanding of black hole environments. The work was conducted at NASA’s Marshall Space Flight Center in Huntsville, Alabama.

Many black holes are encircled by accretion disks —turbulent whirlpools of gas and debris, —and they also feature superheated coronas. These coronas are dynamic regions of plasma that are responsible for most X-ray emissions from black holes though scientists have only theoretical insights into their behavior. This latest discovery offers the first glimpse into the shape of these coronas, potentially deepening our understanding of how they help to generate the energy released when the black holes absorb materials.

“Scientists have long speculated on the makeup and geometry of the corona,” said Lynnie Saade. “Is it a sphere above and below the black hole, or an atmosphere generated by the accretion disk, or perhaps plasma located at the base of the jets?”

Results from the IXPE, which specializes in X-ray polarization, help map the shape and structure of coronas. IXPE observes X-rays, and studies objects that are not just small, but also very distant. X-ray polarization is needed “to determine the geometry of these objects which are too small and distant to image.”

According to Lynnie Saade, “IXPE provides the means to study the black hole’s accretion geometry, or the shape and structure of its accretion disk and related structures, including the corona.”

IXPE demonstrated that, among all black holes for which coronal properties could be directly measured via polarization, the corona was found to be extended in the same direction as the accretion disk – providing, for the first time, clues to the corona’s shape and clear evidence of its relationship to the accretion disk. The results rule out the possibility that the corona is a compact region above and below the black hole or at the base of a relativistic jet.

This research has significant implications. With the increasing availability of data on the shape of the corona, scientists can refine their models and develop a deeper understanding of its nature and behavior.

IXPE has not observed all black holes. This research has only studied 12 black holes, among them Cygnus X-1 and Cygnus X-3, stellar-mass binary black hole systems about 7,000 and 37,000 light-years from Earth, respectively, and LMC X-1 and LMC X-3, stellar-mass black holes in the Large Magellanic Cloud more than 165,000 light-years away.

Stellar mass black holes typically have a mass roughly 10 to 30 times that of Earth’s Sun, whereas supermassive black holes may have a mass that is millions to tens of billions of times larger. Despite these vast differences in scale, IXPE data suggests both types of black holes create accretion disks of similar geometry. Future research is needed to explore more black holes and advance our understanding of the corona.

About IXPE

IXPE, which continues to provide unprecedented data enabling groundbreaking discoveries about celestial objects across the universe, is a joint NASA and Italian Space Agency mission with partners and science collaborators in 12 countries. IXPE is led by Marshall Space Fight Center; Ball Aerospace, headquartered in Broomfield, Colorado, manages spacecraft operations together with the University of Colorado’s Laboratory for Atmospheric and Space Physics in Boulder. https://www.nasa.gov/ixpe

About USRA

Founded in 1969, under the auspices of the National Academy of Sciences at the request of the U.S. Government, the Universities Space Research Association (USRA) is a nonprofit corporation chartered to advance space-related science, technology, and engineering. USRA operates scientific institutes and facilities and conducts other major research and educational programs. An association of 121 university members, it engages the broader university community, employs in-house scientific talent, and offers innovative research, development, and project management expertise. More information about USRA is available at https://www.usra.edu.

Media Contact:
Suraiya Farukhi
sfarukhi@usra.edu
443-812-6945

 

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SOURCE Universities Space Research Association

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Melody Party Offers Over 20,000 Songs and Adds More Than a Thousand New Tracks Monthly, Enhancing Its Online Karaoke Experience

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October 27, 2026

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SEOUL, South Korea, Oct. 27, 2026 /PRNewswire/ — Melody Party is a music social app featuring a variety of activities, including Mic Grab, Artist Mafia, and Singing Battle. Through its online karaoke feature, SING A SONG, the app brings the traditional karaoke experience online, removing time and location constraints and offering a music experience that combines real-time singing with social interaction.

SING A SONG features an extensive library of more than 20,000 songs, with over a thousand new songs added every month. Its diverse selection includes popular K-pop tracks, classic Korean songs, and karaoke favorites. The feature offers a free-use model, allowing users to start singing their chosen songs without paying a separate fee. This helps reduce the time and cost associated with visiting traditional coin-operated karaoke venues, making it easier to enjoy singing as part of everyday life.

In terms of functionality, SING A SONG supports pitch adjustment and independent volume controls for vocals and accompaniment, allowing users to customize their singing experience according to their preferences. Users can also create online karaoke rooms, invite friends to sing together in real time, and enjoy voice chat and social interaction.

By continuously expanding its song library and offering diverse music-based interactive experiences, Melody Party continues to strengthen its music ecosystem. Through SING A SONG, the platform aims to create an accessible, highly interactive online music social space.

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SOURCE Melody Party

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Drawing new strength from 20-year legacy, IAACA calls on global counterparts to join annual conference to fortify integrity

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October 27, 2026

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MARRAKECH, Morocco, Oct. 27, 2026 /PRNewswire/ — The International Association of Anti-Corruption Authorities (IAACA), an independent and non-political anti-corruption organisation with over 190 member anti-corruption authorities (ACAs) worldwide, will co-host IAACA Annual Conference 2026 in Marrakech, Morocco next month together with the Independent Commission Against Corruption of Hong Kong, China (ICAC) and the National Authority for Probity, Prevention and Fight Against Corruption of Morocco (INPPLC) to chart a path for the global graft fight and explore cutting-edge approaches to tackle emerging corruption challenges.

Themed “Building on 20 Years of Legacy: Drawing Strength from the Past, Guarding Global Integrity for the Future”, the international event will not only mark the 20th anniversary of the IAACA, but also provide a dynamic forum for IAACA members to exchange insights and enhance co-operation.

Calling on international counterparts to participate in the conference scheduled for November 25, IAACA President Mr Woo Ying-ming, who also serves as ICAC Commissioner, said that “As the IAACA marks its 20th anniversary, the conference will bring together global anti-corruption community at a pivotal moment for collective action. I anticipate that the valuable insights and new approaches generated through the international synergy will chart a resilient strategic path for us to navigate integrity risks and draw strength from our shared legacy to guard global integrity for generations to come.”

During the conference, renowned international experts from the United Nations Office on Drugs and Crime (UNODC), Basel Institute on Governance, the International Anti-Corruption Academy, and global anti-corruption and law enforcement agencies and institutions will shed light on harnessing artificial intelligence in the fight against corruption, safeguarding integrity within global climate and biodiversity frameworks and analysing global corruption measurement and systemic effectiveness.

Following the conference, the ICAC, the INPPLC, the IAACA and the UNODC will co-organise a training seminar on leveraging AI in combating corruption.

While the ICAC and INPPLC will share how AI and new technology can reshape the future of anti-graft enforcement and corruption prevention, the UNODC will provide a global perspective on using AI models in financial crime investigations and addressing the operational relevance, legal robustness and adaptability across jurisdictions.

For details of the conference and training, please visit:
https://www.icac.org.hk/icac/iaaca-morocco-2026/index.html

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SOURCE International Association of Anti-Corruption Authorities (IAACA)

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Viettel moves 100 million subscribers to home-grown cloud-native charging in three months – with zero downtime

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October 27, 2026

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HANOI, Vietnam, Oct. 27, 2026 /PRNewswire/ — Viettel High Technology Industries Corporation (Viettel High Tech), part of Viettel Group, has migrated more than 100 million subscribers and some 5,000 tariff plans at Viettel, Vietnam’s largest mobile operator, to vOCS 4.0, its in-house cloud-native charging system. The three-month cutover ran on a live national network with no service disruption.

Replacing a charging system is one of the riskiest projects an operator can undertake, which is why many stick with legacy platforms. Viettel High Tech reduced the risk through real-time data synchronization, parallel running and a phased cutover, with instant rollback at every stage.

The project won the Telecom Review Excellence Awards 2026 prize for Best Technology Deployment in Asia, a first for a Vietnamese company.

What it means for operators:

Scale: more than 300,000 transactions per second at latency below 5 milliseconds, across 2G–5G and fixed services on one platformLower cost: up to 50% less hardware investment than the previous generation, by sharing infrastructure with the networkAgility: new tariff plans in hours instead of days, new features three times faster and deployments about 30% fasterResilience: two active data centers about 2,000 km apart and automatic recovery in under two minutes

Viettel High Tech developed every core layer in-house, from a telecom-grade cloud-native platform and NFV-MANO orchestration to real-time charging, subscriber and balance management.

“Passing rigorous tests of real-time self-diagnosis and self-recovery is what allows an operator to keep its promise of 24/7 service to customers,” said Luu Manh Ha, CEO of Viettel Networks, which operates the system on Viettel’s network in Vietnam. “Above all, owning the charging system means an operator is not dependent on foreign vendors – it safeguards digital sovereignty and preserves business flexibility.”

“The charging system is where an operator’s business strategy turns into revenue in real time,” said Nguyen Minh Quang, CEO of Viettel High Tech. “We believe vOCS 4.0 is ready to help operators worldwide capture the value of 5G and digital services.”

In 2017, vOCS 4.0’s predecessor, vOCS 3.0, replaced a foreign vendor’s platform for 90 million Viettel subscribers. Across both generations, vOCS serves more than 220 million subscribers in 11 countries. Viettel High Tech now offers vOCS 4.0 to operators worldwide.

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SOURCE Viettel Group

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