https://www.sciencealert.com/world-first-study-reveals-how-lightning-sparks-gamma-ray-flashes
#gammarays
An interesting proposal to build a Compton telescope using an opaque liquid scintillator that is able to confine photons #gammarays
http://arxiv.org/abs/2502.20916v3
Understanding Cosmic Explosions: StarBurst Arrives at NASA for Testing https://www.nasa.gov/image-article/understanding-cosmic-explosions-starburst-arrives-at-nasa-for-testing/ #NASA #GammaRays #MarshallAstrophysics #MarshallScienceResearchProjects #MarshallSpaceFlightCenter #TheUniverse
On this day seven years ago, an international research team (led by @mpi_grav and @MPIfR_Bonn) published the first millisecond pulsar flashing only in gamma rays.
The discovery was possible thanks to the volunteer distributed computing project @einsteinathome, which the researchers used to find many more gamma-ray pulsars.
Millisecond pulsars are neutron stars – remnants of stellar explosions about 20 km in size with strong magnetic fields – that spin many hundreds of times per second around their axis.
Prior to this discovery, all millisecond pulsars observed in gamma rays also emitted radio waves. The newly discovered “PSR J1744-7619” (rotating 213 times per second) is the first known exception.
https://www.science.org/doi/10.1126/sciadv.aao7228 [Open Access]
#Astronomy #Astrophysics #Pulsar #NeutronStar #GammaRays #OTD
ZME Science: This Supermassive Black Hole Shot Out a Jet of Energy Unlike Anything We’ve Seen Before…
When the Event Horizon Telescope (EHT) unveiled the first image of a black hole in 2019, the world got its first glimpse into the glowing halo surrounding the supermassive black hole at the center of the galaxy M87, also known as Virgo A or NGC 4486... ZME Science #space #antimatter #blackholes #EHT #galaxies #gammarays
ZME Science: This Supermassive Black Hole Shot Out a Jet of Energy Unlike Anything We’ve Seen Before…
When the Event Horizon Telescope (EHT) unveiled the first image of a black hole in 2019, the world got its first glimpse into the glowing halo surrounding the supermassive black hole at the center of the galaxy M87, also known as Virgo A or NGC 4486... ZME Science #space #antimatter #blackholes #EHT #galaxies #gammarays
Overlooked Weather Phenomenon Produces Gamma Rays in Our Atmosphere
The electrical effects of a thunderstorm are not confined just to high up in the atmosphere. Close to the ground, Earth's atmosphere hums with intense electric fields that accelerate particles, flinging electrons in ways that force atoms to glow with gamma rays.
#gammarays #lightning #weather
https://www.sciencealert.com/overlooked-weather-phenomenon-produces-gamma-rays-in-our-atmosphere
Via NASA Plane, Scientists Find New Gamma-ray Emission in Storm Clouds https://science.nasa.gov/earth/via-nasa-plane-scientists-find-new-gamma-ray-emission-in-storm-clouds/ #NASA #Earth #GammaRays #GoddardSpaceFlightCenter
NASA’s Mini BurstCube Mission Detects Mega Blast https://science.nasa.gov/burstcube/nasas-mini-burstcube-mission-detects-mega-blast/ #NASA #Astrophysics #BurstCube #CubeSats #GammaRays #GammaRayBursts #GoddardSpaceFlightCenter #ISSResearch #SmallSatelliteMissions #TheUniverse
NASA’s Mini BurstCube Mission Detects Mega Blast https://science.nasa.gov/burstcube/nasas-mini-burstcube-mission-detects-mega-blast/ #NASA #Astrophysics #BurstCube #CubeSats #GammaRays #GammaRayBursts #GoddardSpaceFlightCenter #SmallSatelliteMissions #TheUniverse
It’s Saturday morning, so once again it’s time for an update of activity at the Open Journal of Astrophysics. This week we have published another batch of four papers, the same number as last week, which takes the count in Volume 7 (2024) up to 64 and the total published altogether by OJAp up to 179.
Before announcing the week’s papers I’ll add three other updates you might find interesting:
- When I looked at NASA/ADS this morning to help construct this post I saw that papers published in OJAp have now garnered over 2500 citations between them;
- We had a good response to our recent call for new members of the Editorial Board and have added four new members here;
- Last week we received a significant (unsolicited) cash donation from a higher education institution based in Europe to help with our work in Diamond Open Access. If any other organizations or individuals would like to do similar then please contact me!
Now, in chronological order, the four papers published this week, with their overlays, are as follows. You can click on the images of the overlays to make them larger should you wish to do so.
First one up is: “Widespread disruption of resonant chains during protoplanetary disk dispersal by Bradley M S Hansen (UCLA), Tze-Yeung Yu (UCLA) and Yasuhiro Hasegawa (JPL), all based in California, USA. The paper presents a discussion of the effect of a dispersing protoplanetary disk on the evolution of low-mass planets around a Solar mass star. It was published on 21st July 2024 and is in the folder marked Earth and Planetary Astrophysics.
Here is a screen grab of the overlay, which includes the abstract:
You can find the officially accepted version of the paper on the arXiv here.
The second paper to announce is “Using A One-Class SVM To Optimize Transit Detection” by Jakob Roche of the University of South Florida, also in the USA (but not in California). This articles discusses the advantages of One-Class Support Vector Machines (SVMs) over Convolutional Neural Networks (CNN) in the context of exoplanet detection. Its in the folder called Instrumentation and Methods for Astrophysics and was published on 25th July 2024.
You can see the overlay here:
The accepted version of this paper can be found on the arXiv here.
The next paper, also published on 25th July 2024, is in the folder marked High-Energy Astrophysical Phenomena. Its primary classification on arXiv is General Relativity and Quantum Cosmology (gr-qc), but it is cross-listed on astro-ph so we considered it for publication and had it refereed, with favourable results. It is entitled “What no one has seen before: gravitational waveforms from warp drive collapse” and is by Katy Clough (QMUL, UK), Tim Dietrich (Potsdam, Germany) and Sebastian Khan (Cardiff, UK). Looking at the title of this paper you might be tempted to dismiss it on the grounds that warp drives are the stuff of science fiction (which they are), but this paper is really a rigorous technical study of the dynamical evolution and stability of spacetimes that violate the null energy condition, inspired by the idea of a warp drive.
Here is the overlay:
You can find the full text for this one on the arXiv here.
Last, published on 26th July 2024, we have a paper with the title “A study of gamma-ray emission from OJ 287 using Fermi-LAT from 2015-2023” by Vibhavasu Pasumarti and Shantanu Desai of the Indian Institute of Technology, Hyderabad, India. It is an investigation of the properties of gamma-ray emission from OJ287 (a BL Lac object) using the Fermi Large Area Telescope (LAT). This one is also in the folder marked High-Energy Astrophysical Phenomena; here is the overlay
You can find the officially accepted version of this paper on the arXiv here.
That’s all for this week. Stay tuned for another update next week.
https://telescoper.blog/2024/07/27/four-new-publications-at-the-open-journal-of-astrophysics-6/
#arXiv240602466v2 #arXiv240700504v3 #BLLac #DiamondOpenAccess #EarthAndPlanetaryAstrophysics #gammaRays #gravitationalWaves #HighEnergyAstrophysicalPhenomena #InstrumentationAndMethodsForAstrophysics #MachineLearning #OJ287 #OpenAccess #OpenJournalOfAstrophysics #planetFormation #ScienceFiction #SupportVectorMachines #TheOpenJournalOfAstrophysics #TransitDetection #WarpDrives
NASA’s Fermi Finds New Feature in Brightest Gamma-Ray Burst Yet Seen https://science.nasa.gov/science-research/astrophysics/gamma-ray-bursts/nasas-fermi-finds-new-feature-in-brightest-gamma-ray-burst-yet-seen/ #NASA #BlackHoles #FermiGammaRaySpaceTelescope #GalaxiesStarsBlackHoles #GammaRays #GammaRayBursts #GoddardSpaceFlightCenter #MarshallSpaceFlightCenter #StellarMassBlackHoles #TheUniverse
My favorite spacecraft, #Fermi is turning 15 this year, and the collaboration is celebrating with a free e-book. I'll tell you how it is if my devices start working again (come on, it's not May 1st yet!) and I manage to download it!
https://science.nasa.gov/missions/fermi/explore-the-universe-with-the-first-e-book-from-nasas-fermi/
#eBook #astrophysics #nasa #GammaRays #HEAP #HighEnergy #astronomy
NASA’s Tiny BurstCube Mission Launches to Study Cosmic Blasts https://science.nasa.gov/burstcube/nasas-tiny-burstcube-mission-launches-to-study-cosmic-blasts/ #NASA #Astrophysics #BurstCube #CubeSats #GammaRays #GammaRayBursts #GoddardSpaceFlightCenter #GravitationalWaves #InternationalSpaceStationISS #NeutronStars #SensingTheUniverseMultimessengerAstronomy
NASA’s Tiny BurstCube Mission Launches to Study Cosmic Blasts https://science.nasa.gov/burstcube/nasas-tiny-burstcube-mission-launches-to-study-cosmic-blasts/ #NASA #Astrophysics #BurstCube #CubeSats #GammaRays #GammaRayBursts #GravitationalWaves #InternationalSpaceStationISS #NeutronStars #SensingTheUniverseMultimessengerAstronomy #TheUniverse
😥
Mi ero persa la notizia della fine delle attività scientifiche a gennaio, quindi il rientro in atmosfera di #AGILE è stato una brutta sorpresa per me... Grazie, leggenda!
I missed the news on AGILE ceasing scientific operations last January, so its deorbiting came as a bad surprise to me... Thank you, legend!
#gammarays #xrays #astrophysics #astrofisica #gamma #raggigamma #raggix #satellite #spazio #astronomia #astronomy
Gamma-ray Bursts: Harvesting Knowledge From the Universe’s Most Powerful Explosions https://science.nasa.gov/universe/gamma-ray-bursts-harvesting-knowledge-from-the-universes-most-powerful-explosions/ #NASA #Astronomy #Astrophysics #BlackHoles #ComptonGammaRayObservatoryCGRO #FermiGammaRaySpaceTelescope #GalaxiesStarsBlackHoles #GammaRays #GammaRayBursts #NeutronStars #Stars
What’s Made in a Thunderstorm and Faster Than Lightning? Gamma Rays! https://science.nasa.gov/universe/whats-made-in-a-thunderstorm-and-faster-than-lightning-gamma-rays/ #NASA #BlackHoles #Earth #ExtremeWeatherEvents #FermiGammaRaySpaceTelescope #GammaRays #GammaRayBursts #NeutronStars #TheUniverse #WeatherAndAtmosphericDynamics
Bel timelapse della mappa di intensità di raggi #gamma raccolti in 14 anni dal mio #telescopio spaziale preferito: #Fermi!
Beautiful timelapse showing the gamma ray intensity map over 14 years of observations by my favorite #space #telescope: Fermi!
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