Phenomenology 2023 Symposium

Session

Gravity I

May 9, 2023, 2:00 PM

Lawrence Hall 205

Conveners

Gravity I

• Benjamin Lehmann (Massachusetts Institute of Technology)

120. Constraining Electromagnetic Signals from Black Holes with Hair

Nicole Crumpler

5/9/23, 2:00 PM

We constrain a broad class of “hairy” black hole models capable of directly sourcing electromagnetic radiation. We assume this emission is triggered by a catastrophic event, such as a binary black hole merger. This signal is generic and model-independent since it depends only on the black hole mass and the proportion of that mass released as radiation (denoted by $\epsilon$). In the most...

167. Relativistic Signatures of Flux Eruption Events Near Black Holes

Zack Gelles (Princeton University)

5/9/23, 2:15 PM

The black hole images released by the Event Horizon Telescope have opened up a multitude of opportunities to improve our understanding of gravity in strongly curved spacetimes, as well as elucidate the dynamics of turbulent plasma. In this talk, I will connect these two phenomena by demonstrating that the intrinsic variability of reconnection-driven flares in the accretion flow can introduce...

151. Spinor Bose Einstein Condensates : From Cosmos to Laboratory

Mudit Jain

5/9/23, 2:30 PM

I will describe spatially localized Bose Einstein condensates (BECs) composed of non-zero spin particles, that carry huge amounts of intrinsic spin angular momentum. Such objects are naturally present in the spectrum of a massive integer spin field theory admitting attractive self-interactions, and are relevant both in cosmology and laboratory setups. In the cosmological scenario, they are...

58. Freezing-In Gravitational Waves

Jan Schütte-Engel

5/9/23, 2:45 PM

The thermal plasma in the early universe produced a stochastic gravitational wave (GW) background, which peaks today in the microwave regime and was dubbed the cosmic gravitational microwave background (CGMB). In previous works only single graviton production processes that contribute to the CGMB have been considered. In this talk we also investigate graviton pair production processes and show...

66. The Primordial Black Holes that Disappeared: Connections to Dark Matter and MHz-GHz Gravitational Waves

Thomas Gehrman (University of Oklahoma)

5/9/23, 3:00 PM

Light primordial black holes(PBHs) form in the early universe through a variety of formation mechanisms. These PBHs can Hawking evaporate before BBN to produce SM particles and in our scenario also generate the dark matter(DM) relic abundance. High frequency gravitational waves in the MHz-GHz regime are produced during the formation of these light PBHs. In this talk I will present two...

30. Planck Constraints and Gravitational Wave Forecasts for Primordial Black Hole Dark Matter Seeded by Multifield Inflation

Sarah Geller (MIT)

5/9/23, 3:15 PM

In my talk, I will present recent significant work on the formation of primordial black hole dark matter and the resultant
gravitational wave signal, drawing from the results of arXiv:2303.02168, with co-authors
W. Qin, S. Balaji, D.I. Kaiser, and E. McDonough, which has been submitted for peer review to Phys. Rev. D. My talk will also build on our previous results as published in...

29. Going Underground or Listening to the Sky?

Anupam Ray

5/9/23, 3:30 PM

Dark Matter (DM) remains mysterious. Despite decades of experimental efforts, its microscopic identity is still unknown. Terrestrial detectors are placing stringent exclusions on various parts of the DM parameter space, however, there exist a few blind-spots. In this talk, I will demonstrate how existing GW detectors can be used to unravel the particle nature of DM. More specifically, by...

136. Detecting Dark Compact Objects in Gaia DR4: A Data Analysis Pipeline for Transient Astrometric Lensing Searches

I-Kai Chen, Marius Kongsore (University of Michigan (US))

5/9/23, 3:45 PM

The Gaia satellite is cataloging the astrometric properties of an unprecedented number of stars in the Milky Way with extraordinary precision. This provides a gateway for conducting extensive surveys of transient astrometric lensing events caused by dark compact objects. In this work, we establish a data analysis pipeline capable of searching for such events in the upcoming Gaia Data Release 4...