Abstract : The motion of three bodies can be solved perturbatively when a tightly bound inner binary is orbited by a distant perturber on an elliptic orbit. The exchange of angular momentum between the two orbits gives rise to Kozai-Lidov oscillations of eccentricity and inclination characterizing many different systems in astronomy. In this talk, I […]
Some content and references can be found in the review 1903.06239 or the introduction of 2004.00030.
Warm dark matter (WDM) could explain some small-scale structure observations that have challenged the cold dark matter (CDM) model, as warm particles suppress structure formation due to free streaming effects. Observing small-scale structure thus provides a valuable way to distinguish between CDM and WDM. In this talk, I will present a semi-analytical model for the […]
Please see the following website for all information: https://indico.cern.ch/event/888220/
A particle physics approach to describing black hole interactions is opening new avenues for understanding gravitational-wave observations. In this talk, we will review this paradigm change showing how general relativity naturally emerges from scattering amplitudes. Applications for deriving solutions to Einstein field equations, the bending of light and waveforms - directly from quantum field theory […]
Primordial black holes (PBHs), possibly formed via gravitational collapse of large density perturbations in the very early universe, are one of the earliest proposed and viable dark matter (DM) candidates. PBHs can make up a large or even entirety of DM over a wide range of masses. Ultralight PBHs in the mass range of 10^{15} […]
https://arxiv.org/pdf/2007.00082.pdf https://arxiv.org/pdf/2012.03950.pdf Please note the unusal time!
This is a meeting on topics related to string and field theory, between members of nearby institutions: IP2I (CNRS, UCBL), Lyon LAPTh (CNRS, USMB), Annecy LPENSL (CNRS, ENSL), Lyon More information can be found on the AnLy webpage. For this first edition, the meeting will take place in LAPTh, Annecy, on the 16/11/21. Travel […]
NEWS FROM THE DARK LAPTh, Annecy - November 22-24, 2021 Episode 6 For more information click Here
Participation to the event is by invitation only. If you would like to participate or contribute in some way, please contact serpico _at_ lapth.cnrs.fr. Unless LAPTh administration takes care of your trip, please think of reserving transportation and (above all!) the hotel ASAP, since Annecy is a tourist destination at all times of the year. […]
https://arxiv.org/abs/2106.12582 https://indico.in2p3.fr/event/25013/contributions/101345/
L'organisation du Système Solaire et la description des mouvements qui le caractérisent ont constitué le cœur de l'astronomie pendant de siècles depuis l'antiquité. Cette science appelée Mécanique Céleste qui repose sur la théorie de la gravitation a connu son heure de gloire au XIXe siècle, avant de passer au second plan devant l'essor de l'astrophysique. […]
