[Astro] [CAPT] Particle Cosmology and Gravity Seminar this week: Isobel Romero-Shaw

[Elisa Todarello]

Dear All,

                  We have a seminar this week this week. The seminar details are provided below -

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Speaker: Isobel Romero-Shaw (Cambridge)

Seminar date: June 10th, Tuesday, 1 pm UK time

Venue: Seminar Room A 113 (Cripps North Building, CAPT)


Title: Leveraging eccentricity in gravitational-wave transients

Abstract:  The fourth observing run of the LIGO-Virgo-KAGRA detector network is ongoing, and the number of detections of gravitational waves from binary black hole mergers is rapidly reaching into the hundreds. Yet despite this wealth of detections, it is still unclear how black holes become bound into tight binaries that merge within the age of the Universe.

Binaries that form and merge in isolation may have different parameters than those that form under via dynamical interactions.
The masses and spins of binaries have typically been touted as keys to deciphering formation channels; however, these parameters have significant drawbacks as formation-channel indicators.
The most robust indication of dynamical evolution is orbital eccentricity: isolated binaries will have essentially circular orbits at detection, while a fraction of dynamically-formed binaries will have measurable eccentricity. Gravitational waves from eccentric binaries are challenging to detect and analyse, yet in the last few years, a handful gravitational-wave events have been shown to contain tantalising hints of orbital eccentricity.
Additionally, future gravitational-wave detectors will be sensitive to smaller binary eccentricities and earlier binary evolutionary epochs, enabling us to dive deeper into their formation stories.
In this talk, I will demonstrate how eccentricity may be detected and leveraged to reveal details of a binary’s history. I will show how signals from eccentric binaries enable us to uncover external influences to their evolution, including perturbing tertiaries and circumbinary disks, with current and future detectors.  I will review what we can learn about our population of binary black holes when we combine observations of their masses, spins, and eccentricity. I will also demonstrate how studying these parameters simultaneously reveals the formation scenarios of compact binaries.

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Link to join:

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List of upcoming Seminars:

17th June: Rachel Gray (Glasgow)
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With Regards,
-Elisa & Swagat



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