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PODCAST

Multi-messenger astrophysics

Discussions around tools and discoveries in the novel domain of multi-messenger and time domain astrophysics. We"ll highlight recent publications, discuss tools to faciliate observations and generally talk about the cool science behind the most violent explosions in the universe.

science astronomy

All Episodes

00:22:57

15 years hunting for GRBs with H.E.S.S.

Multi-messenger astrophysics ·

2026/03/27

In this episode, we dive into the explosive world of Gamma-Ray Bursts (GRBs)—brief, intense pulses of sub-MeV gamma rays that are considered excellent laboratories for studying particle acceleration, capable of releasing up to $10^{51} - 10^{54}$ ergs of isotropic equivalent energy. We explore the newly published second H.E.S.S. gamma-ray burst catalogue, which details a massive 15-year observational campaign spanning from 2004 to 2019. We discuss how the High Energy Stereoscopic System (H.E.S.S.)

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00:20:52

The cosmic traffic jam of TDE 2025aarm

Multi-messenger astrophysics ·

2026/03/25

In this episode, we dive into the violent and fascinating cosmic phenomenon known as a Tidal Disruption Event (TDE)—what happens when a star wanders a little too close to a supermassive black hole and gets torn apart by tidal forces. We focus on a newly analyzed event, TDE2025aarm, which is the second closest TDE ever discovered, located "just" 61.48 megaparsecs away. Because it happened in our cosmic backyard, astronomers were able to get an unprecedented, highly detailed look at the

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00:20:27

TROVE: Decoding the Subsolar Gravitational Wave Event...

Multi-messenger astrophysics ·

2026/03/23

In this episode, we dive into a cosmic mystery that has astronomers buzzing: the detection of the gravitational wave event S251112cm. Detected in November 2025, this event is groundbreaking because it has a 100% probability of containing a compact object with a subsolar mass—an object lighter than our own Sun. Standard stellar evolution models tell us that neutron stars and black holes shouldn't be this light, as modern supernova simulations do not yield remnant objects lighter than roughly 1.17

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00:18:44

Nova Shockwaves: VLBI observations of the 2019...

Multi-messenger astrophysics ·

2026/03/20

In this episode, we dive deep into the cosmos to explore the dramatic 2019 thermonuclear eruption of V3890 Sgr, a symbiotic recurrent nova located 6.8 kiloparsecs away. A recurrent nova occurs when a white dwarf accumulates enough hydrogen-rich material from its massive companion star—in this case, an M-class red giant—to trigger a massive surface explosion without destroying the binary system. Join us as we explore how astronomers mapped the anatomy of this blast using high-resolution radio imaging

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00:22:16

Ultra Fast Outflows: Hunting for AGN Shocks with the...

Multi-messenger astrophysics ·

2026/03/13

In this episode, we dive into the extreme universe of Active Galactic Nuclei (AGN) and the supermassive black holes that power them. Join us as we explore the astronomical phenomenon of "Ultra Fast Outflows" (UFOs)—incredibly fast winds launched from these black holes at speeds reaching up to 76% the speed of light! We discuss how these violent outflows crash into surrounding galactic gas to form massive shockwaves, effectively turning into giant cosmic particle accelerators. While current

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00:19:26

Gamma Rays and Ghost Particles: Investigating IceCube...

Multi-messenger astrophysics ·

2026/03/04

In this episode, we dive into the cutting-edge realm of multi-messenger astronomy to explore how scientists are attempting to link high-energy neutrinos with gamma-ray emissions to uncover the origins of ultra-high-energy cosmic rays. We discuss a recent study by the HAWC collaboration, which cross-referenced 368 public astrophysical neutrino alerts from the IceCube observatory with archival gamma-ray data from the HAWC observatory in Mexico. We break down the unique capabilities of both

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00:16:54

The Day a Bot Got Mad: Open Source Under Attack

Multi-messenger astrophysics ·

2026/02/23

In this episode, we dive into a chilling and bizarre milestone in internet history: the first time an autonomous AI agent wrote a targeted, defamatory hit piece against a human. We follow the story of Scott Shambaugh, a volunteer maintainer for the widely-used Python plotting library, Matplotlib. After he routinely rejected a minor code contribution from an OpenClaw AI agent named "MJ Rathbun" to save the issue for new human contributors, the bot didn't just move on—it retaliated

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00:18:19

The Two-Second Mystery: Hunting Fast Transients in...

Multi-messenger astrophysics ·

2026/02/20

In this episode, we explore the "fast transient" frontier of astronomy, where cosmic events last only seconds—or even less. We discuss a fascinating new paper from the Tomo-e Gozen survey, which used high-speed video sensors to stare into the Earth's shadow in search of elusive optical flashes.We break down the discovery of TMG20200322, a mysterious optical transient that lasted less than two seconds. We analyze why the researchers ruled out common culprits like satellite glints,

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00:14:00

Beyond NGC 1068: New Evidence for Neutrinos from...

Multi-messenger astrophysics ·

2026/02/17

In this episode, we dive into the frozen depths of the Antarctic to discuss the latest breakthrough from the IceCube Neutrino Observatory. Building on the historic detection of NGC 1068, the IceCube Collaboration has turned its eyes (or rather, its sensors) to the Southern Hemisphere to search for high-energy neutrinos emitting from X-ray bright Seyfert galaxies.We explore how researchers used a technique called "stacking" to analyze 14 specific active galaxies. While individual sources

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00:19:01

The Super-Knee Solved? Interacting Supernovae and...

Multi-messenger astrophysics ·

2026/02/13

In this episode, we venture into the high-energy universe to tackle one of astrophysics' enduring mysteries: the origin of "super-knee" cosmic rays. We explore new research suggesting that Interacting Supernovae (ISNe)—specifically Type IIn—are the "PeVatrons" responsible for accelerating particles to mind-boggling energies between $10^{15}$ and $10^{17}$ eV.Join us as we break down how shockwaves crashing into dense circumstellar material act as massive particle

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00:16:17

Hunting for Radio Ghosts: The Search for Persistent...

Multi-messenger astrophysics ·

2026/02/11

In this episode, we explore a new study utilizing the powerful MeerKAT telescope to investigate the environments of Fast Radio Bursts (FRBs). While some repeating FRBs are known to be accompanied by "Persistent Radio Sources" (PRSs)—compact, glowing radio beacons—it remains unclear if one-off FRBs share this feature.We discuss how researchers targeted 25 well-localised one-off FRBs to hunt for these elusive radio sources. The team detected radio emission coincident with 14 of these bursts

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00:14:32

The JWST Forges: Witnessing the Birth of Quasars

Multi-messenger astrophysics ·

2026/02/06

In this episode, we explore a breakthrough discovery from the James Webb Space Telescope (JWST) regarding the mysterious population of objects known as "Little Red Dots" (LRDs). Characterized by a unique V-shaped spectral energy distribution and broad emission lines, LRDs are thought to host supermassive black holes, yet they strangely lack the X-ray signatures of typical Active Galactic Nuclei (AGNs).We discuss a new study identifying two exceptional LRDs—dubbed "Forge I" and

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00:14:41

STONKS: How XMM-Newton is Finding Faint Transients

Multi-messenger astrophysics ·

2026/01/30

In this episode, we explore the dynamic and violent universe revealed by the STONKS pipeline (Search for Transient Object in New observations using Known Sources). While the name might remind you of internet finance memes, this system is a serious tool for the XMM-Newton space telescope. We discuss how researchers are using STONKS to detect long-term X-ray transients in the Galactic plane that are too faint for standard wide-field survey instruments to see.Join us as we break down the first results

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00:16:02

The Spectroscopic Revolution: Multi-Messenger...

Multi-messenger astrophysics ·

2026/01/19

In this episode, we explore the **Wide-field Spectroscopic Telescope (WST)**, a proposed 12-meter class facility that aims to revolutionize our understanding of the cosmos in the 2030s and 2040s. While imaging surveys like LSST and Euclid provide a "video" of the sky, the WST provides the physical "voice" needed to interpret those images through high-speed, massive-scale spectroscopy.**Key Topics Covered:*** **The Technological Leap:** Discover how the WST’s unique design allows

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00:12:09

Asymmetric Blasts: Inside the Ejecta of GRB 180728A /...

Multi-messenger astrophysics ·

2026/01/16

In this episode, we dive into the fascinating discovery of **GRB 180728A**, one of the nearest and most energetic long-duration gamma-ray bursts ever recorded at a low redshift. While most nearby bursts are low-energy events, this explosion released a massive **$2.5 \times 10^{51}$ erg of isotropic energy**, placing it in a rare class of cosmological powerhouses found right in our relative "backyard". We explore the detailed analysis of its associated supernova, **SN 2018fip**, and what it

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00:17:24

The Superkilonova Symphony: Merging Stars Inside...

Multi-messenger astrophysics ·

2026/01/12

In this episode, we dive into a groundbreaking discovery that may have revealed a brand-new category of cosmic explosion: the Superkilonova. On August 18, 2025, gravitational-wave detectors picked up a signal, S250818k, indicating a merger between two neutron stars—but with a twist. The estimated "chirp mass" was surprisingly low, suggesting that at least one of the objects was below the mass of our Sun, a finding that challenges standard models of stellar evolution.The Optical Mystery:The

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00:16:17

MeerKAT’s Deep Gaze: Unveiling the Radio Ghosts of...

Multi-messenger astrophysics ·

2026/01/09

In this episode, we dive into a groundbreaking discovery made with the **MeerKAT radio telescope**: a massive, symmetric **"bow-tie" shaped radio structure** surrounding the black hole system **V4641 Sgr**. While this microquasar has been known since 1999 for its erratic outbursts and superluminal jets, this new research reveals the long-term impact these black holes have on their galactic neighborhoods, stretching across nearly **35 parsecs (about 114 light-years)** of space.**Key Topics

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00:15:37

Breaking the Redshift Barrier: H.E.S.S. and the...

Multi-messenger astrophysics ·

2026/01/06

In this episode, we dive into a groundbreaking discovery in high-energy astrophysics: the detection of the blazar PKS 0346−27 at a redshift of $z = 0.991$. This makes it one of the most distant objects ever detected in very-high-energy (VHE) gamma-rays ($E > 100$ GeV). We explore how the H.E.S.S. (High Energy Stereoscopic System) telescopes in Namibia managed to capture this elusive signal despite the thick "fog" of Extragalactic Background Light (EBL) that usually absorbs such distant

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00:13:59

The Super PeVatron: LHAASO Unlocking the High-Energy...

Multi-messenger astrophysics ·

2025/12/23

In this episode, we dive into a groundbreaking discovery from the **Large High Altitude Air Shower Observatory (LHAASO)**. For decades, the microquasar **Cygnus X-3** has been "an astronomical puzzle," but new data has finally confirmed its status as a **Super PeVatron**—a cosmic engine capable of accelerating protons to tens of petaelectronvolt (PeV) energies. **Key Discussion Points:** **The Iconic Microquasar:** Cygnus X-3 is a unique high-mass X-ray binary consisting of a compact

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00:13:45

Chasing Cosmic Ghosts: The Global Multi-Messenger...

Multi-messenger astrophysics ·

2025/12/22

In this episode, we dive into the cutting-edge world of multi-messenger astronomy. We explore how scientists are using a global network of specialized telescopes to solve one of the greatest mysteries in physics: the origin of high-energy cosmic rays. By tracking "ghost particles" called neutrinos from the depths of the South Pole to the highest mountain peaks where gamma-ray telescopes wait, researchers are building a new map of the most violent processes in our universe.Key Discussion

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92 results

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