Zobrazeno 1 - 10
of 78
pro vyhledávání: '"Touma, Jihad"'
Debris disc architecture presents [exo-]planetary scientists with precious clues for processes of planet formation and evolution, including constraints on planetary mass perturbers. This is particularly true of the disc in HD 106906, which in early H
Externí odkaz:
http://arxiv.org/abs/2210.07395
Autor:
Najem, Sara, Monni, Stefano, Hatoum, Rola, Sweidan, Hawraa, Faour, Ghaleb, Abdallah, Chadi, Ghosn, Nada, Hassan, Hamad, Touma, Jihad
In this paper, we propose a general framework for optimal control measures, which follows the evolution of COVID-19 infection counts collected by Surveillance Units on a country level. We employ an autoregressive model that allows to decompose the me
Externí odkaz:
http://arxiv.org/abs/2204.11576
Autor:
Farhat, Mohammad, Touma, Jihad
To date, studies of $\textit{Laplace Surface}$ dynamics have concerned themselves with test particle orbits of fixed shape and orientation in the combined field of an oblate central body (to which the particle is bound) and a distant, inclined, compa
Externí odkaz:
http://arxiv.org/abs/2107.09682
The centers of most galaxies contain massive black holes surrounded by dense star clusters. The structure of these clusters determines the rate and properties of observable transient events, such as flares from tidally disrupted stars and gravitation
Externí odkaz:
http://arxiv.org/abs/1907.01555
Autor:
Sefilian, Antranik A., Touma, Jihad R.
A relatively massive and moderately eccentric disk of trans-Neptunian objects (TNOs) can effectively counteract apse precession induced by the outer planets, and in the process shepherd highly eccentric members of its population into nearly-stationar
Externí odkaz:
http://arxiv.org/abs/1804.06859
We present idealized models of a razor-thin, axisymmetric, Keplerian stellar disc around a massive black hole, and study non-axisymmetric secular instabilities in the absence of either counter-rotation or loss cones. These discs are prograde mono-ene
Externí odkaz:
http://arxiv.org/abs/1710.11340
Autor:
Sridhar, S., Touma, Jihad R.
We study the Resonant Relaxation (RR) of an axisymmetric low mass (or Keplerian) stellar disc orbiting a more massive black hole (MBH). Our recent work on the general kinetic theory of RR is simplified in the standard manner by ignoring the effects o
Externí odkaz:
http://arxiv.org/abs/1602.05763
Autor:
Touma, Jihad R., Sridhar, S.
Publikováno v:
Nature, 524, 439 (2015)
Most exoplanetary systems in binary stars are of S--type, and consist of one or more planets orbiting a primary star with a wide binary stellar companion. Gravitational forcing of a single planet by a sufficiently inclined binary orbit can induce lar
Externí odkaz:
http://arxiv.org/abs/1509.04620
Autor:
Sridhar, S., Touma, Jihad R.
We present a theory in three parts, of the secular dynamics of a (Keplerian) stellar system of mass $M$ orbiting a black hole of mass $M_\bullet \gg M$. Here we describe the collisionless dynamics; Papers II and III are on the (collisional) theory of
Externí odkaz:
http://arxiv.org/abs/1509.02397
Autor:
Sridhar, S., Touma, Jihad R.
We present a first-principles theory of Resonant Relaxation (RR) of a low mass stellar system orbiting a more massive black hole (MBH). We first extend the kinetic theory of Gilbert (1968) to include the Keplerian field of a black hole of mass $M_\bu
Externí odkaz:
http://arxiv.org/abs/1509.02401