This podcast explores gamma rays in the universe, discussing their origins and the challenges of studying them. It highlights the expertise of Professor Paula Chadwick in high energy physics in astronomy. The connection between gamma ray astronomy and particle physics is also explored, along with the Swift Observatory's ability to track gamma ray bursts. Additionally, the podcast discusses magnetars and provides tips for observing the upcoming event of Jupiter and Saturn being close together in the night sky.
Gamma ray bursts and high energy physics are explored, including their connection to black holes and neutron stars.
The prominence of the constellation Orion in December makes it an ideal target for stargazers, and the conjunction of Jupiter and Saturn on December 21st adds to the excitement.
Deep dives
Gamma Ray Bursts and High Energy Physics
Gamma ray bursts and high energy physics are explored in this podcast episode. The hosts discuss the extreme nature of gamma ray bursts and their connection to high energy phenomena in the universe. Gamma rays are described as the most energetic part of the electromagnetic spectrum, with sources including jets from black holes, supernova remnants, and rapidly rotating neutron stars. The detection and study of gamma rays require specialized telescopes, as they do not penetrate Earth's atmosphere. The Cherenkov Telescope Array is mentioned as a future project that will enhance our understanding of gamma ray sources even further.
Understanding Magnetars: Exotic Neutron Stars
Magnetars, a type of neutron star with an extremely intense magnetic field, are discussed. The episode explains that magnetars possess magnetic fields billions to trillions of times stronger than Earth's magnetic field. These highly energetic objects are thought to emit gamma ray bursts and may contribute to phenomena like fast radio bursts. The decay of their magnetic fields over a relatively short timescale of about 10,000 years is believed to be responsible for their intense bursts of energy. The origin and formation of magnetars, including the possibility of a strong dynamo in their cores, are still topics of ongoing research.
Exploring Quasars: Distant and Bright Objects
Quasars, incredibly bright and distant objects powered by supermassive black holes, are highlighted. The podcast mentions that quasars emit vast amounts of energy and light, making them visible even from great distances. These objects provide insight into early universe galaxies and the evolution of elements. The rarity of visible quasars in the night sky is noted, as they are most commonly observed in the x-ray and gamma ray wave bands. The close conjunction of Jupiter and Saturn on December 21st is also highlighted, with the event being associated with a modern-day star of Bethlehem.
Spotting Orion and Christmas Astronomy
The podcast encourages listeners to observe the night sky in December, particularly focusing on the prominence of the constellation Orion. They describe Orion as a familiar and recognizable constellation, ideal for beginners and seasoned stargazers alike. The various objects in Orion, such as the Orion Nebula and the Christmas Tree Cluster, are mentioned as fascinating targets for observation. The hosts also mention the rare and closely aligned appearance of Jupiter and Saturn on December 21st, which adds to the excitement of stargazing this month.
This month, Izzie & Becky are taking astronomy to the extremes with gamma ray expert, Professor Paula Chadwick, and Professor Julian Osborne from the SWIFT Observatory.
Plus, Robert Massey shares his top tips for stargazing at home and how best to see the conjunction of Jupiter and Saturn on December 21st. Send your pictures and questions to podcast@ras.ac.uk or tweet @RoyalAstroSoc using #RASSupermassive.
The Supermassive Podcast is a Boffin Media Production by Izzie Clarke and Richard Hollingham
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