Agenda 2025-2026
- 2025 September 12th Young stellar objects
Herbig Ae, T Tau, FU Ori (and FUOrs), Herbig-Haro objects - 2025 October 10th Be stars
and the combined effects of rotation, decretion (disks), and outflows (winds), interpretation of spectra of composite systems; why this is different than cataclysmics; binary stars among the Be stars - 2025 November Pulsation
mechanisms and observations (photometric and spectroscopic), including irregular variables; radial and nonradial oscillations; periodic oscillations and music (I hope you like this one) - 2025 December Advanced stages of ordinary stellar evolution
red giants and supergiants, AGB stars; Mira, RV Tau and semi-regular variables - 2026 January: The Light as electromagnetic wave
- 2026 February: Reading a spectrum
- 2026 March: Reading a spectrum – 2
- 2026 April: Structure, evolution, and spectra of binaries
Understandding and modeling single nonrotatig nonmagnetic isolated stars is almost a done deal. Well, except for little things like convection and late stages. But put two stars, of common or captured origin, together and a vast array of alternative lives suddenly appears. To put this in context, since we have yet to cover the implications of interactions, this time the topic will include how the structure, evolution, and spectra of binary and multiple systems is so intriguingly different — for instance from internal mixing, rotation, dynamo activity, mass transfer and mass loss — than the canonical picture of stellar evolution.
Agenda 2024-2025
- 2024 September: Novae at multiwavelengths
- 2024 October: Accretion processes onto white dwarfs
- 2024 November; Planetary Nebulae
- 2024 December: H II regions and massive stars
- 2025 January: LBV and the path to Supernovae
- 2025 February: Supernovae
- 2025 March: T CrB and the Symbiotic Recurent Novae, RS Oph, V745 Sco, V407 Cyg …
- 2025 April: Mergers, tidal disruption events, red novae – transients and follow-up (especially important for amateur observations)
- 2025 May: Stellar magnetic fields: their origin, detection, and consequences
- 2025 June: AGN
Recordings
2025-2026
- Young Stellar Objects 2025-09-12 https://youtu.be/BFOWKmn3hDI
- Be Stars 2025-10-10 https://youtu.be/8sB-SNYXVtE
- Pulsation 2025-11-14 https://youtu.be/wpU-1-w6qrM
- Advanced stages of stellar evolution 2025-12-05 https://youtu.be/yym0LM6_dIk
- Light 2026-01-16 https://youtu.be/qLVq3s7Y-3U
- Reading a spectrum 2026-02-20 https://youtu.be/XwUwNycIHbM
- Reading a spectrum 2026-03-20 https://youtu.be/Pau8ozHNPiY
2024-2025
- Novae 2024-09-06 https://youtu.be/0akhb3rTmsg
- Accretion onto white dwarfs https://youtu.be/tMNa2Y7DgHw
- Planetary Nebulae https://youtu.be/_aJFy52ge74
- LBV: https://youtu.be/gHh2UA59diA
- HII regions and massive stars 2024-12-06 https://youtu.be/KBamlLLFRjU
- Supernovae 2025-02-10 https://youtu.be/FJncCRSPUhw
- T CrB and the Recurrent Symbiotic Novae https://youtu.be/ta3kWqc5Oes
- Mergers,tidal disruption events, red novae https://youtu.be/n5CiIn5VVoQ
- Stellar magnetic fields 2025-05-24 https://youtu.be/9B1WEhkLQRo
- Active Galactic Nuclei 2025-06-20 https://youtu.be/-cQ2rTSv8Tc
Registration open for 2026 April 24 (19:00 UT)
Reading a spectrum
Additional material
- Light 2026-01-16