Black Hole and Gravitational-Wave Day

Friday May 12, 2023, 8:45 AM → 10:30 PM Europe/Berlin

E.0.11 (Max Planck Institut für Astrophysik)

The purpose of the Black Hole and Gravitational-Wave Day is to bring together researchers in the Munich area interested in black holes and gravitational waves with the aim of fostering fruitful exchange and collaboration. Topics include:

• Primordial Black Holes
• Black Holes (theory, detection)
• Gravitational waves from Black Holes
• Stochastic gravitational waves (B-modes, early Universe physics, ...)

This event will take place at Max Planck Institute for Astrophysics (MPA) and will be a free-of-charge, full-day in-person meeting on the 12th of May 2023. We look forward to meet you!

 

Padlet:

https://padlet.com/korolvaleria/bhs-gws-discussion-forum-fnggpwg2t18ybky9

Upload your slides:

https://datashare.mpcdf.mpg.de/s/qSIG9pL2xg3ryAz

Zoom:

Meeting ID: 677 7108 1081
Passcode: 573983

 

Overview talks:

• Selma de Mink (MPA)
• Gia Dvali (LMU & MPP)
• Reinhard Genzel (MPE)
• Florian Kühnel (MPP & LMU)
• Elena Maria Rossi (Leiden University)

Organisers:

• Mathias Garny (TUM)
• Valeriya Korol (MPA)
• Florian Kühnel (MPP & LMU)
• Henrique Rubira (TUM)
• Julia Stadler (MPA)

 

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(LMU =  Ludwig Maximilian University of Munich; MPE = Max Planck Institute for Extraterrestrial Physics; MPP = Max Planck Institute for Physics; TUM = Technical University of Munich)

8:55 AM → 9:00 AM Welcome and Intro

9:00 AM → 9:50 AM Primordial Black Holes

Convener: Henrique Rubira (TUM)

9:00 AM PBH overview

Speaker: Florian Kühnel (MPP & LMU Munich)

9:30 AM Lattice simulations of axion inflation (Angelo Caravano)

Speaker: Angelo Caravano

9:40 AM Primordial black holes and ultradense halos (Sten Delos)

Speaker: M. Sten Delos (Max Planck Institute for Astrophysics)

9:50 AM → 10:30 AM Black Holes

Conveners: Henrique Rubira (TUM), Valeriya Korol (Max Planck for Astrophysics)

9:50 AM What are Gravitational Wave detections starting to teach us about the stellar progenitors of binary black holes (Selma de Mink)

10:20 AM Extremely relativistic tidal disruption events (Taeho Ryu)

Speaker: Taeho Ryu (The Max-Planck Institute for Astrophysics)

10:30 AM → 11:00 AM Coffee break and discussion

11:00 AM → 11:45 AM Distinguished lecture

Reinhard Genzel

Convener: Julia Stadler (Max Planck Institute for Astrophysics)

11:45 AM → 12:00 PM Discussion

Conveners: Julia Stadler (Max Planck Institute for Astrophysics), Mathias Garny (TUM)

12:00 PM → 1:30 PM Lunch

1:30 PM → 3:00 PM Gravitational Waves

Convener: Valeriya Korol (Max Planck for Astrophysics)

1:30 PM The revolutionary black hole science of LISA (Elena Maria Rossi)

2:00 PM From (dormant) black-hole binaries to gravitational-wave sources (Jakub Klencki)

Speaker: Jakub Klencki (ESO Garching)

2:10 PM Gravitational Wave Event Follow-Up with the Wendelstein Observatory (Daniel Gruen)

Speaker: Daniel Gruen (LMU Munich)

2:20 PM Stellar black hole mergers as probes of cosmic chemical evolution (Martyna Chruslinska)

Speaker: Martyna Chruslinska

2:30 PM GWs from fisrt-order phase transitions (Henrique Rubira)

Speaker: Henrique Rubira (TUM)

2:40 PM Asteroseismic Constraints on the Stochastic Gravitational Wave Background (Earl Bellinger)

Speaker: Earl Bellinger (Max Planck Institute for Astrophysics)

2:50 PM Gravitational waves from confined monopoles (Juan Sebastian Valbuena Bermudez)

Speakers: Juan Sebastian Valbuena Bermudez (LMU), Juan Sebastián Valbuena-Bermúdez (MPP & LMU, Munich)

3:00 PM → 3:30 PM Discussion

Conveners: Henrique Rubira (TUM), Valeriya Korol (Max Planck for Astrophysics)

3:30 PM → 4:00 PM Coffee break and discussion

4:00 PM → 6:00 PM Black Holes

Convener: Florian Kühnel (MPP & LMU Munich)

4:00 PM Resolving Horizon-Scale Dynamics of Black Holes (Jakob Knollmüller)

Speakers: Jakob Knollmüller (ORIGINS Data Science Lab), Jakob Knollmüller (Max Planck Institue for Astrophysics)

4:10 PM Forming massive seed BHs in the metal-enriched universe (Sunmyon Chon)

Speaker: Sunmyon Chon (MPA)

4:20 PM The dead rise up: the distribution of compact remnants in the Galactic Underworld (David Sweeney)

Speakers: David Sweeney (Sydney University), David Sweeney (The University of Sydney)

4:30 PM The early life of gravitational wave sources - detecting intermediate phases in double-compact object formation (Julia Bodensteiner)

Speaker: Julia Bodensteiner (European Southern Observatory)

4:40 PM Intermediate mass black hole feedback in dwarf galaxy simulations with a resolved ISM and accurate nuclear stellar dynamics (Christian Partmann)

Speaker: Christian Partmann

4:50 PM Disc Wars: The Thin disc strikes back (Deepika Bollimpalli)

Many accreting black holes and neutron stars exhibit rapid variability
in their X-ray light curves, termed quasi-periodic oscillations (QPOs);
The commonly observed type is the low-frequency (< 10 Hz), type-C QPOs,
thought to originate from the Lense-Thirring precession of a hot,
geometrically thick accretion flow misaligned with the black hole spin
axis. Numerous simulations in the past have demonstrated that such
misaligned accretion flows precess at frequencies matching the
observations. However, none of these simulations involves more realistic
geometries like a truncated disc (a geometrically thin disc surrounding
an inner hot accretion flow), leaving an open question: What is the
effect of the outer, thin disc on the precession of the inner, hot
accretion flow? To address this, we perform GRMHD simulations of a
truncated disc with the inner, hot flow misaligned with the spin axis of
the black hole. The key finding of our simulations is that the presence
of an outer-thin disc decreases the precession rate of the inner torus
by nearly 95 per cent due to the exchange of the angular momentum
between the inner and outer discs, thus relieving some of the remaining
tensions between the Lense-Thirring precession model and observations.
The misalignment also excites variability in the inner, hot flow at
higher frequencies, which is otherwise absent in the aligned discs.

5:00 PM Towards the mass function of isolated stellar mass black holes with interferometric follow up of microlensing (Antoine Mérand)

Speaker: Antoine Mérand (European Southern Observatory)

5:10 PM How special are black holes? Correspondence with objects saturating unitarity bounds in generic theories (Oleg Kaikov)

Speaker: Oleg Kaikov (MPP & LMU, Munich)

5:20 PM TBA (Gia Dvali)

Speaker: Gia Dvali (MPP & LMU, Munich)

7:30 PM → 10:00 PM Social dinner: Frauenplatz 9 80331 München https://www.bratwurst-gloeckl.de/