Phil Lynch

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Phil Lynch

Phil Lynch

@PhysLynch

Postdoc at the Albert Einstein Institute, Potsdam. He/him

Berlin, Germany Katılım Eylül 2018
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Phil Lynch
Phil Lynch@PhysLynch·
I’ve been on this site for over a year and I haven’t actually explained what it is I do for a living. I study what happens when a black hole (BH) /neutron star (NS) spirals into a supermassive black hole (SMBH). These systems are called extreme mass ratio inspirals (EMRIs). 1/7
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Phil Lynch
Phil Lynch@PhysLynch·
Hey, I've been using the site formally known as twitter less and less over the years and given it's current state I've finally moved over to where the skies are always bluer If you want to keep following me check out my bio!
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Phil Lynch
Phil Lynch@PhysLynch·
I'll post a longer thread outlining the main ideas of this paper soon. In the meantime I'd like to extend a huge thank you to my collaborators @w_vojtech, Maarten van de Meent, and @Niels_JW
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Phil Lynch
Phil Lynch@PhysLynch·
My newest paper is finally on the arXiv today!! It's all about near-identity averaging transformations for extreme mass ratios with eccentricity and spin precession and how to best deal with evolving through orbital resonances arxiv.org/abs/2405.21072
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Nihar Gupte
Nihar Gupte@nihar_gupte·
Hi everyone! Today I wanted to announce a paper that we have been working on for over a year now. We found some signs of eccentricity in binary black holes observed by LIGO-Virgo-KAGRA: arxiv.org/abs/2404.14286. I thought I would go over the paper a bit in this thread! 1/15
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Keefe Mitman
Keefe Mitman@KeefeMitman·
I made a movie illustrating the gravitational memory effect for a colleague and thought that I'd share it here! For those who don't know, gravitational waves permanently distort spacetime, as shown here through the change in the position of some test particles.
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Ben Leather
Ben Leather@ben_leather·
Ever wonder how a paper actually gets written? ✍️ Our recent paper on effective-source approaches for eccentric orbits has been accepted for publication by Phys. Rev. D. To celebrate, here is a compilation of how the paper came together. @Niels_JW @APSphysics
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Phil Lynch
Phil Lynch@PhysLynch·
@balthazar3827 @ToughSf With this definition of average density, a lot of supermassive black holes are less dense than water
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Phil Lynch
Phil Lynch@PhysLynch·
@balthazar3827 @ToughSf This is a pretty counter intuitive idea. If we define the volume of the BH as the event horizon, then the "volume" scales with the Schwarzschild radius cubed, and that scales with the mass. So V ~ M^3 Since density = M/V ~ 1/M^2 So as mass increases, "density" decreases
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ToughSF
ToughSF@ToughSf·
Actually, why is this the case? Why is the Observable Universe a thousand times denser than a black hole of equal size? Is it that: -Black hole scaling breaks down at super-huge sizes? -Our Universe is already a black hole? -Some factor prevents the collapse of the Universe?
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ToughSF@ToughSf

@jgeyser A simple calculation. The Observable Universe is 93 billion lightyears wide. It has a mass of 3 x 10^54 kg when we include the dark stuff. So density is around 8 x 10^-27 kg/m^3. A black hole with that much mass would have a diameter of 930 billion lightyears...

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Phil Lynch
Phil Lynch@PhysLynch·
@sarahaj95 Congrats!! It's such a huge relief once it's finally submitted
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Ben Leather
Ben Leather@ben_leather·
The UK's return to @HorizonEU is a significant moment, yet let's not underestimate the formidable challenges that persist in science and research stemming from the Brexit disaster. Mainly the cost of Visas and healthcare. Before 2016, these problems did not exist... ⅕ 🇪🇺🇬🇧
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Phil Lynch
Phil Lynch@PhysLynch·
Lovely to see my thesis highlighted by @LISACommunity. If you're interested in some light reading, you can follow the link to the PDF. Otherwise make sure to check out the full range of other research projects that have gone into making the LISA what it is
LISA Mission@LISACommunity

Dr. Philip Lynch @PhysLynch got his PhD at University College Dublin in 2022 and is now working at Albert Einstein Institute, Potsdam. His thesis can be found here 👉 researchrepository.ucd.ie/handle/10197/1… #LISAMission #LISAPhDTheses

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chrislintott
chrislintott@chrislintott·
Results just released from @NANOGrav and international partners show - for the first time - the signature of long-wavelength gravitational waves rippling through space. (1/n)
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Miguel Zumalacarregui
Miguel Zumalacarregui@miguelzuma·
Our work on weak lensing of gravitational waves is finally out: arxiv.org/abs/2306.05282 I'm on vacation today, but I'll go over our results as soon as I'm back. I'll just leave you with one of our awesome plots 🎉
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Keefe Mitman
Keefe Mitman@KeefeMitman·
🎉 Paper Day! 🎉 (an exciting one too!) Numerical relativity surrogate model with memory effects and post-Newtonian hybridization [arxiv.org/abs/2306.03148] Yoo, Mitman, Varma, et. al. (@vijay_x_varma and also @duetosymmetry!) What's the hype about?! A 🧵... 1/16
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Leo C. Stein is @duetosymmetry on bsky/threads/🐘
Leo C. Stein is @duetosymmetry on bsky/threads/🐘@duetosymmetry·
🎉 New paper day! 🎉 Though I'm a bit busy at a conference so no thread planned at the moment. Punchline is: the latest numerical relativity waveform surrogate model includes memory, and is properly hybridized with post-Newtonian waveforms! Check it out at arxiv.org/abs/2306.03148
Leo C. Stein is @duetosymmetry on bsky/threads/🐘 tweet mediaLeo C. Stein is @duetosymmetry on bsky/threads/🐘 tweet media
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Phil Lynch
Phil Lynch@PhysLynch·
Still, this work stands as an important milestone for producing fast and accurate ERMI waveforms for LISA 16/16 End 🧵
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Phil Lynch
Phil Lynch@PhysLynch·
There are some obvious limitations here. Our calculation only uses one value of spin (a= 0.9M). We also neglect 1PA effects like the 2nd order GSF (as it's not known) and the spin on the secondary (future work). 15/16
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Phil Lynch
Phil Lynch@PhysLynch·
Our newest paper is finally on the arXiv! This paper has been in the works fro well over a year now, so it's great to finally get it out there! Let's have a quick run through of the basic ideas 🧵1/16 arxiv.org/abs/2305.10533
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Keşfet

@w_vojtech @APSphysics @balthazar3827 @ToughSf @HorizonEU @LISACommunity @NANOGrav @EPTAGW