Michelle and Payel

StarXiv: a podcast discussing the latest astronomy papers

Science EN ↓ 39 episodes

Hello! Welcome to the StarXiv, hosted by Dr Michelle Collins and Dr Payel Das. This is a biweekly podcast that delves into the latest astronomy papers & results from the arXiv. Michelle and Payel are astronomers at the University of Surrey. They love research, but struggle to find time to read a lot of papers. They’re hoping this podcast fixes that. The beautiful logo is designed by Izzy Gray, a PhD student currently studying at the University of Surrey.

Author

Michelle and Payel

Category

Science

Podcast website

rss.com

Latest episode

Jun 23, 2026

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Episodes

Episode 39 – data-driven stellar population studies, multi-scale AGN feedback, and solar flare ribbons 23.06.2026

In this episode, Payel and Nicole discuss machine learning methods to to transform composite galaxy spectra and determine key features of galaxy evolution. They also examine new observations of the Centarus cluster with JWST, closing the loop on AGN feedback across multiple radial scales. Finally, they discuss new solar observations that shed new light on the formation of solar flare ribbons. A no...

Episode 38 - merging galaxies, exploding stars and the beauty of individual galaxies 08.06.2026

In this episode, Michelle and Nicole discuss machine learning methods to classify merging galaxies and different classes of supernova. They also look into whether planetary engulfment can explain unsual chemical signatures in some binary systems, and dive deep into some beautiful MUSE data for a spiral galaxy at redshift 0.09. Check it out below, on Spotify , Apple podcasts , or wherever you get y...

Episode 37 - Lunar craters, primordial black holes & growing galaxies 25.05.2026

In this episode, Michelle and Payel talk about the asymmetry in the number of craters across the moon, using microlensing to find primordial black holes, tracing the growth of disk galaxies since z~1, and using machine learning to detect group galaxies merging with massive clusters. Check out the papers we discussed below: Lunar ejecta as the missing piece to resolving lunar cratering asymmetry -...

Episode 36 - Dead Earths, magnetic fields and Galactic amnesia 11.05.2026

In this episode, Michelle and Nicole discuss primordial magnetic fields, Galactic merger memory, the origin of Venus's carbon dioxide rich atmosphere and using Galactic stars to predict extragalactic abundances. Listen below, on Apple podcasts , Spotify , or wherever you get your podcasts.

Episode 35 - More Milky Way mayhem, Fast Radio Bursts, and very cold disks 28.04.2026

In this episode, Nicole and Payel discuss an accurate dating of the Gaia-Enceladus Sausage merger with the Milky Way, a new probe of matter clustering on small scales using Fast Radio Bursts, a new analysis of the retrograde stars in the Milky Way, and a simulation perspective on the very cold disks found at high redshift by ALMA. And check out the papers below: The Last Galactic Firework: Timing...

Episode 34 - The cosmic web, the ancient Milky Way, and planets around small stars 13.04.2026

In this episode, Nicole and Payel discuss a stellar system located towards the Galactic bulge, the structure of filaments in the cosmic web, the homogeneity of the chemical compositions of exoplanets born in the same disc, and the possibility of water-rich hot super Earths. Check out the papers below: The multi-age stellar populations of Terzan 5 as revealed by JWST Giorga Zullo et al. Universal D...

Episode 33 - Bananas, blueberries, planet eating stars and the fate of the Milky Way 30.03.2026

In this episode, Michelle and Payel delve into the story of UV bright galaxies at high redshifts, hints of population III stars, black hole binaries, planet eating stars, pulsars in Omega Centauri and whether or not the Milky Way and Andromeda will merge. Find all the links to the papers at Starxiv.com .

Episode 32 - Ancient star clusters and growing black holes 16.03.2026

In this episode, Michelle and Nicole were on-theme with their paper choices. They discuss whether and how stars from ancient globular clusters populate the stellar halo of the Milky Way, and look into research on growing massive black hole seeds in the smallest dwarf galaxies. Tune in here, on Spotify, Apple podcasts, or wherever you get your podcasts

Episode 31 - Near Earth Objects, Little Red Dots, bursty star formation and life around massive stars 02.03.2026

In this episode, Michelle and Payel discuss the latest theories of little red dot formation, bursty star formation at high redshift, triple-double radio galaxies, where asteroids like Apophis come from, and how likely life might be around massive stars. Check out the episode below, on Spotify, Apple or wherever you get your podcasts.

Episode 30 - Direct collapse black holes, nuclear stellar discs, and machine learning merger histories 16.02.2026

In this episode, Payel and Nicole delve into more JWST discoveries and the frontier of machine learning in astronomy - an ultra-deep view of the cosmic web, machine-learning deep images to look for mergers, a direct collapse black hole explanation to Little Red Dots, machine-learning the Milky Way to reveal complex star formation histories of accreted systems, and the earliest nuclear stellar disc...

Episode 29 - Exploding stars, carbon stars, and starbursting pseudo little red dots 26.01.2026

In this episode, Michelle and Nicole hit the arXiv and dig into the latest on Thamnos - an ancient Milky Way merger, carbon stars in the Large Magellanic Stars, Supernova Type Ia as cosmic probes, and a little red dot that isn't a little red dot. Tune in here, on Spotify , Apple or wherever you get your podcasts. And check out the papers below

Episode 28 - Fading stars, digesting planets and dark matter conundrums 12.01.2026

In this episode, Michelle and Payel both dissect interesting results from varying stars, including follow up on Betelgeuse's elusive companion. They also talk about the imprints of digested and transiting stars on their hosts spectra, and an unusual lensing signal that could pose difficult questions for warm and cold dark matter. Listen below, on Apple, Spotify or wherever you get your podcasts.

Episode 27: Making a Milky Way, searching for dwarfs, and elusive black holes 22.12.2025

This episode, Payel and Nicole discuss how to generate alpha-bimodalities in Milky-Way-like galaxies without major mergers or radial migration, a new search for radio emission from the elusive intermediate-mass black hole of Omega Centauri , detailed chemical DNA measurements of the oldest stars in the Small Magellanic Cloud, and searching for dwarfs using HI measurements. Check out the papers we...

Episode 26: A tail of tales, little galaxies, and starspots 08.12.2025

This episode, Payel and Nicole discuss streamer-like structures around protostellar sources, a multiply imaged Little Red Dot with an apparent blue companion, age and metallicity of low-mass galaxies, starspots and flares, and exploring the ultra-faint dwarf Bootes I using JWST and HST. Check out the papers we discussed below: A tale of three tails: A misaligned streamer and mysterious structures...

Episode 25: Extragalactic exoplanets, simulating individual stars, and galaxy mergers as cosmic ray factories 24.11.2025

This episode, Michelle, Payel, and Nicole discuss simulating individual stars, exoplanets born outside of the Milky Way, the intracluster medium as a window to past merging activity, the chemical versus kinematic thin and thick discs of the Milky Way, early formation of supermassive black holes, and galaxy mergers as cosmic ray sources. Check out the papers we discussed below EDGE-INFERNO: How che...

Episode 24 - Strong lenses, Solar Flares and young, high alpha stars 12.11.2025

This episode, Michelle and Payel discuss the Solar birth cluster, young stars with high alpha abundances, the formation of intermediate mass black holes, decelerated expansion of the Universe, strong lens detection in Euclid and predicting solar flares. Check out the papers we discussed below: Spectroscopic Follow-up of Young High-α Dwarf Star Candidates: Still Likely Genuinely Young - Yuxi Lu Lim...

Episode 23 - Failed galaxies, faint galaxies, and the proto-Galaxy 27.10.2025

In this episode, Michelle and Nicole discuss what sets the chemistry of the faintest galaxies and RR-Lyrae stars, how to trace the proto-Galaxy, why some galaxies fail to thrive, can quasi-stars can explain Little Red Dots, and whether UNIONS 1 is a galaxy or a star cluster. Tune in below, on Spotify , Apple or wherever you get your podcasts.

Episode 22 - ORCs, rings, and Galactic histories 13.10.2025

In this episode, Payel and Nicole discuss what happens to the metallicity gradient of a satellite galaxy after it merges with its host, the existence of intermediate-age RR lyrae and radio rings, the possibility of determining the history of the inner Milky Way from radially migrated stars, and the possibility of finding more Einstein rings using a new approach that utilises both spectra and image...

Episode 21 - Mercury, chemistry and quasi periodic eruptions  29.09.2025

In this episode, Michelle and Nicole discuss merger debris around a distant spiral galaxy, metal-mixing around pop III stars, quasi-periodic eruptions in Ansky, relic galaxies, Mercury's magnetosphere and second generation stars in globular clusters. Listen below, on Spotify , Apple Podcasts or wherever you get your podcasts.

Episode 20 - Dark galaxies, black holes, star formation and life in the faintest galaxies? 15.09.2025

In this episode of the StarXiv Michelle and Payel talk about very massive and less massive black holes, the possibility of feedback free star formation, dark galaxies, runaway dwarf galaxies and the chance of life in the faintest galaxies. Check out the papers below! AGN-heated dust revealed in "Little Red Dots - I Delvecchio et al. Is feedback-free star formation possible? - A. Ferrara et al. The...

Episode 19 - Peering into the Local Universe, distant black holes, forming planets and alien signatures 01.09.2025

This episode, Michelle and Payel reunite to discuss the chemistry of nearby M-dwarf stars, where the majority of stars form in the Milky Way, whether giant planets naturally form at large distances from their hosts, extending the search for supermassive black holes and the search for alien technosignatures. Check out the papers we discussed below! The origin of extreme N-emitters in star-forming g...

Episode 18 - disks, disks and more disks! 18.08.2025

In this episode, Michelle and Nicole dissect 5 papers, and accidentally find a common theme: disks! Whether in low mass galaxies, giant low surface brightness galaxies, the rotation curves of spirals or the natal environment of planetary systems, disks really are all around us. They also discuss the differences in chemistries between globular clusters that have been accreted or formed in-situ, jus...

Episode 17 - detecting dark matter, unusual black holes and speedy stars 04.08.2025

In this episode, Michelle and Payel discuss the claimed detection of a starless dark matter subhalo, speedy, puffy white dwarfs, super massive black holes and how to form and grow them, smaller black holes and how to merge them, and star clusters in the Sparkler galaxy. Listen below, on Spotify , Apple podcasts or wherever you get your podcast.

Episode 16 - interstellar visitors, molten planets and faint, dark galaxies 21.07.2025

In this episode, Michelle and Payel squash in more papers than ever, as Michelle delves into a flurry of papers about new newly discovered interstellar comet: 3I/ATLAS. They also discuss what sets the metallicities of the faintest galaxies, how nitrogen enrichment relates to gas density, the molten properties of a new ultra-short period planets, and how to find 'dak' galaxies! Find the papers we d...

Episode 15 – Flare-inducing planets, avoiding catastrophe, and accreted star clusters 07.07.2025

This episode, Michelle is back and she and Payel discuss long period pulsars, population III galaxies, latent variables in Galactic archaeology, accreted globular clusters, planets that cause their star to flare and avoiding photo0z catastrophes. Check out the papers we discussed this episode below! Metal-polluted PopIII galaxies and How to Find Them – Elka Rusta et al. Close-in planet induces fla...

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