#LHAASO

[spacenutspod]

The Space, Astronomy & Science Podcast. SpaceTime Series 27 Episode 27 *Hints of an Extended Kuiper Belt: New Horizons' Dusty Discoveries NASA's intrepid New Horizons spacecraft, now journeying through the outer reaches of the Kuiper Belt, has detected unexpectedly high levels of cosmic dust. This discovery suggests that the Kuiper Belt, a frigid expanse beyond Neptune, may stretch much farther into space than previously believed. Could this mean the existence of a second belt, or an extension of the one we know? Join us as we unravel the implications of these findings for our understanding of the solar system's distant frontier. *Cygnus Star Forming Region's Gamma Ray Bubble: A Cosmic Particle Accelerator Unveiled Astronomers have spotted a massive ultra-high-energy gamma-ray bubble in the Cygnus star forming region, marking the first time such an origin for cosmic rays has been pinpointed. Using the Large High Altitude Air Shower Observatory (LHAASO), scientists have detected photons with energies surpassing a petaelectronvolt, suggesting a powerful cosmic ray accelerator at work within the bubble. Dive into the heart of Cygnus with us and explore the mysteries of cosmic ray origins. *Space Travel's Toll on the Immune System A study published in Frontiers in Immunology raises concerns about the impact of space travel on human health, revealing that the immune systems of astronauts could be compromised. With space exploration on the rise, understanding these changes is crucial for the future of long-duration missions. We'll discuss the study's findings and what they mean for the safety of those venturing beyond Earth's gravity. *NASA's Laser Precision: Tracking Lunar Landers with Retroreflectors NASA's new laser retroreflector arrays are set to revolutionize lunar navigation. These small, lightweight devices will provide pinpoint accuracy in locating landers and other spacecraft on the Moon's surface. Learn how this technology could facilitate landings in the Moon's darkest regions and aid future exploration. Listen to SpaceTime on your favorite podcast app with our universal listen link: https://spacetimewithstuartgary.com/listen and access show links via https://linktr.ee/biteszHQ For more SpaceTime and show links: https://linktr.ee/biteszHQ For more space and astronomy podcasts visit our HQ at https://bitesz.com Become a supporter of this podcast: https://www.spreaker.com/podcast/spacetime-with-stuart-gary--2458531/support.

[spacetimewithstuartgary]

LHAASO reveals key evidence of the cosmic ray acceleration limit in the W51 complex for the first time

The Large High Altitude Air Shower Observatory (LHAASO) officially released the precise measurements of high-energy gamma radiation from the W51 complex, confirming it as a cosmic-ray accelerator boosting particles up to so-called ultra-high energies (UHE, above 1014 electronvolts). This study also provides key evidence about the cosmic-ray acceleration limit in this complex. The findings, entitled "Evidence for particle acceleration approaching PeV energies in the W51 complex," were recently published online in Science Bulletin. The research was conducted by the LHAASO International Collaboration, led by the Institute of High Energy Physics, Chinese Academy of Sciences.

The W51 complex is one of the largest and the most active "stellar factories" in the Milky Way and one of the few regions confirmed to host GeV energy cosmic-ray accelerators. It plays a crucial role in unraveling the century-old mystery of the "origin of cosmic rays." Researchers utilized data from the LHAASO experiment to, for the first time, extend the measurements of the energy spectrum of gamma-rays from this region to the UHE range. They clearly observed a "bending" structure in the gamma-ray spectrum at tens of TeV, indicating the acceleration limit of cosmic rays in this region.  

The energy spectrum measured by LHAASO can be smoothly connected with that was measured by the Fermi-LAT collaboration at lower energies.  Spanning six orders of magnitude of gamma-ray energy. the spectrum provides important evidence that the radiation originates from collisions between cosmic rays and molecular clouds. It also indicates that the W51 complex has a cosmic-ray acceleration limit of around 400 TeV. “The supernova remnant W51C, located in the W51 complex, is the most plausible cosmic-ray accelerator responsible for the wideband gamma-ray emission”, Prof. LI Zhe said, one of the co-corresponding authors.

LHAASO is a national major science and technology infrastructure located on Haizi Mountain at an altitude of 4410 meters in Daocheng, Sichuan province, China. It consists of an array of 5216 electromagnetic particle detectors and 1188 muon detectors distributed in 1 km2, a water Cherenkov detector array covering 78,000 m2 and an array of 18 wide-field-of-view Cherenkov telescopes. LHAASO was completed and began high-quality stable operation in July 2021. It is the most sensitive UHE gamma-ray detection device in the world, characterized by the large field of view and all-weather capability.

IMAGE: The UHE gamma-ray emission is clearly observed from the W51 complex, which hosts the supernova remnant W51C and star forming region W51B. (b) The “bending” feature around tens TeV indicates the cosmic-ray acceleration limit in the W51 complex at around 400TeV. Credit ©Science China Press

[skycrorg]

Detectan emisión de rayos gamma de muy alta energía que rodea a un púlsar distante

Los púlsares son estrellas de neutrones altamente magnetizadas y giratorias que emiten un haz de radiación electromagnética.

Utilizando el Observatorio de Lluvias de Aire a Gran Altitud (LHAASO), un equipo internacional de astrónomos ha detectado rayos gamma de muy alta energía (VHE) alrededor del púlsar PSR J0248+6021, que pueden ser el halo del púlsar o una nebulosa de viento del púlsar. El hallazgo fue reportado en un artículo publicado el 6 de octubre en el servidor de preimpresión arXiv. Los púlsares son…

[astroblogs]

[7ooo-ru]

Объяснен загадочный источник высокоэнергетического космического излучения

Астрономы Университета Мэриленда и Мичиганского технологического университета изучили загадочный источник гамма-излучения сверхвысокой энергии LHAASO J2108+5157. Вероятно, молекулярное облако служит мишенью для космических лучей, ускоряемых остатками сверхновой, производя, в свою очередь, гамма-лучи.

Подробнее https://7ooo.ru/group/2023/09/13/158-obyasnen-zagadochnyy-istochnik-vysokoenergeticheskogo-kosmicheskogo-izlucheniya-grss-239156789.html

[andronetalks]

Mysterious ultra-high energy source investigated by astronomers

Phys Org by Tomasz Nowakowski September 11, 2023 Astronomers from the University of Maryland and the Michigan Technological University, have inspected a mysterious ultra-high energy gamma-ray source known as LHAASO J2108+5157. Results of the study, published August 31 on the pre-print server arXiv, could help us unveil the true nature of this source. Sources emitting gamma radiation with photon…

[gaetaniu]

Gli astronomi indagano una misteriosa fonte di energia ultra potente

Mappa di significatività della regione LHAASO J2108+5157 utilizzando 2400 giorni di dati presi da HAWC. Astronomi dell’Università del Maryland e della Michigan Technological University hanno ispezionato una misteriosa sorgente di raggi gamma ad altissima energia nota come LHAASO J2108+5157. I risultati dello studio, pubblicati sul server di pre-print arXiv, potrebbero aiutarci a svelare la vera…

[karayoluhaber]

Karanlık Madde Bozunmasını Tespit Etmek

Karanlık Madde Bozunmasını Tespit Etmek

Yeni inşa edilen bir gama ışını gözlemevinden elde edilen ilk okumalar kullanılarak varsayımsal parçacıkların ömrüne ilişkin bir alt sınır belirlendi. Çin’in Tibet Platosu sınırındaki Sichuan Eyaleti’nde bulunan Büyük Yüksek İrtifa Hava Yağmuru Gözlemevi (LHAASO), Samanyolu ve diğer galaksilerden yayılan gama ışınlarını arıyor. Gökbilimciler bu yüksek enerjili fotonların varlığını, gama…

[adrianusv61]

Jawel: de Relativiteitstheorie is weer bewezen, dit keer voor zéér hoge energieën

Jawel: de Relativiteitstheorie is weer bewezen, dit keer voor zéér hoge energieën

Jawel, hij heeft weer eens gelijk. Credit: Pixabay/CC0 Public Domain Natuurkundigen moeten de tel kwijt zijn hoe vaak Einstein’s Relativiteitstheorie bewezen is. Onderzoekers van de Chinese Academie voor Wetenschappen hebben de zogeheten Lorentz symmetrie of invariantie bekeken bij ultrahoge energieën en daar komt uit naar voren dat ook bij die zeer hoge energieën geen verbreking van die…

[cheshirecat-rabbit]

China’s Large High Altitude Air Shower Observatory (LHAASO) aims to catch the air showers associated with the highest energy gamma rays, which in turn correspond to the highest energy cosmic rays. LHAASO is a cluster of detectors spanning more than 1 square kilometer on Haizi Mountain, 4410 meters above sea level in Sichuan province. More than 5000 detectors spread across the site capture particles associated with the highest energy strikes, while more than 1000 muon detectors, buried underground, help rule out particle showers associated with unrelated cosmic rays that constantly pepper Earth. Before LHAASO began operations in 2019, most detectors worked in much lower energy bands. But the new results show the universe is capable of far higher accelerations.

Using data from LHAASO’s first year of operation, Cao Zhen from the Institute of High Energy Physics of the Chinese Academy of Sciences and his colleagues detected more than 530 photons with energies greater than 0.1 PeV, they reported yesterday in Nature. The photons were traced to 12 cosmic ray factories capable of PeV accelerations—100 times more energetic than collisions at the world’s most powerful atom smasher, the Large Hadron Collider. The sources, which the team calls “PeVatrons,” include long-suspected accelerators, such as the Crab nebula, the site of an ancient supernova, the final explosion of a dying star, and home to a powerful pulsar, a dense neutron star. But the highest energy photons came from a surprising source: the Cygnus Cocoon, a stellar nursery 4600 light-years from the Sun. “PeVatrons are basically everywhere in our galaxy,” Cao says.

[twistarticle]

China's pursuit of cosmic rays

China’s pursuit of cosmic rays

Beijing, Oct 23 (IANS) The Chinese scientists are constructing a cosmic ray observation station on an area equivalent to 200 soccer fields in China’s southwest Sichuan Province, 4,400 meters above sea level.

Huge rocks left from the Ice Age have been blasted. Different detectors are being installed to form a huge “net” to catch the particles generated by cosmic rays in the atmosphere, to help…

[spacenutspod]

The Large High Altitude Air Shower Observatory (LHAASO) has discovered a giant ultra-high-energy gamma-ray bubble structure in the Cygnus star-forming region, which is the first time that the origin of cosmic rays with energy higher than 10 Peta-Electronvolt (PeV) has been discovered. This achievement was published in the form of a cover article in Science Bulletin on Feb. 26.

[skycrorg]

Astrónomos investigan una espeluznante y misteriosa fuente de energía ultra alta

Astrónomos de la Universidad de Maryland y la Universidad Tecnológica de Michigan han inspeccionado una misteriosa fuente de rayos gamma de energía ultraalta conocida como LHAASO J2108+5157. Los resultados del estudio, publicado el 31 de agosto en el servidor de preimpresión arXiv, podrían ayudarnos a revelar la verdadera naturaleza de esta fuente. Las fuentes que emiten radiación gamma con…

[astroblogs]

Jawel: de Relativiteitstheorie is weer bewezen, dit keer voor zéér hoge energieën

Jawel: de Relativiteitstheorie is weer bewezen, dit keer voor zéér hoge energieën

Jawel, hij heeft weer eens gelijk. Credit: Pixabay/CC0 Public Domain Natuurkundigen moeten de tel kwijt zijn hoe vaak Einstein’s Relativiteitstheorie bewezen is. Onderzoekers van de Chinese Academie voor Wetenschappen hebben de zogeheten Lorentz symmetrie of invariantie bekeken bij ultrahoge energieën en daar komt uit naar voren dat ook bij die zeer hoge energieën geen verbreking van die…

[arxt1]

Evidence of a thick halo for the spatial-dependent propagation model with Cosmic Ray anisotropy. (arXiv:2102.13498v2 [astro-ph.HE] UPDATED)

The spatial-dependent propagation (SDP) model with a nearby source works well to reproduce the co-evolving features of both cosmic ray (CR) nuclei spectra and anisotropy. However, it is well known that the Sun is offset from the Galactic plane. This will lead to a dominating anisotropy in perpendicular direction, which is discrepant with observations. Thus it is necessary to reboot further investigation into the effect of the solar offset. In this work, for the first time the combined studies of the solar offset, nuclei spectra and anisotropy are performed based on the SDP model. As a result, to reproduce CR spectra and anisotropy, the thickness of the halo $\rm (\xi z_h)$ increases linearly with the displacement of the Sun. When the offset is $\rm \sim8~pc$ as estimated from the matter-borne methods, $\rm \xi z_h$ is about 0.9 kpc, which is a much thicker halo than usually. Moreover, the PeV anisotropy could estimate the value of diffusion coefficient, thus breaking the degeneracy of diffusion coefficient and halo thickness. Therefore it is a good messenger to constrain the halo thickness. On the other hand, the anisotropy in PeV energy region, as a new probe, might also shed new light to constrain the solar offset. We hope that the anisotropy at the energies of $\rm \sim TeV$ to $\rm PeV$ can be finely measured by LHAASO experiment, leading to a better understanding about the thick halo.

from astro-ph.HE updates on arXiv.org https://ift.tt/ZI83qXN