Zobrazeno 1 - 10
of 34
pro vyhledávání: '"Del Vigna, Alessio"'
Autor:
Fenucci, Marco, Faggioli, Laura, Gianotto, Francesco, Cioci, Davide Bracali, Cano, Juan Luis, Conversi, Luca, Devogèle, Maxime, Di Girolamo, Gianpiero, Drury, Charlie, Föhring, Dora, Gisolfi, Luigi, Kresken, Reiner, Micheli, Marco, Moissl, Richard, Ocaña, Francisco, Oliviero, Dario, Porru, Andrea, Ramirez-Moreta, Pablo, Rudawska, Regina, Bernardi, Fabrizio, Bertolucci, Alessia, Dimare, Linda, Guerra, Francesca, Baldisserotto, Valerio, Ceccaroni, Marta, Cennamo, Ramona, Chessa, Andrea, Del Vigna, Alessio, Koschny, Detlef, Teodorescu, Ana Maria, Perozzi, Ettore
The NEO Coordination Centre (NEOCC) of the European Space Agency is an operational centre that, among other activities, computes the orbits of near-Earth objects and their probabilities of impact with the Earth. The NEOCC started providing informatio
Externí odkaz:
http://arxiv.org/abs/2411.03763
We construct a Poincar\'e map $\mathcal{P}_h$ for the positive horocycle flow on the modular surface $PSL(2,\mathbb{Z})\backslash \mathbb{H}$, and begin a systematic study of its dynamical properties. In particular we give a complete characterisation
Externí odkaz:
http://arxiv.org/abs/2207.03755
We show that the additive-slow-Farey version of the traditional continued fractions algorithm has a natural interpretation as a method for producing integer partitions of a positive number $n$ into two smaller numbers, with multiplicity. We provide a
Externí odkaz:
http://arxiv.org/abs/2109.08962
Autor:
Del Vigna, Alessio
We give a proof of the identity $\zeta(2)=\sum_{n=1}^\infty \frac{1}{n^2}=\frac{\pi^2}6$ using the fundamental theorem of calculus and differentiation under the integral sign.
Externí odkaz:
http://arxiv.org/abs/2104.01710
The interest in the problem of small asteroids observed shortly before a deep close approach or an impact with the Earth has grown a lot in recent years. Since the observational dataset of such objects is very limited, they deserve dedicated orbit de
Externí odkaz:
http://arxiv.org/abs/2102.11399
Autor:
Bonanno, Claudio, Del Vigna, Alessio
In this paper we study the properties of the \emph{Triangular tree}, a complete tree of rational pairs introduced in \cite{cas}, in analogy with the main properties of the Farey tree (or Stern-Brocot tree). To our knowledge the Triangular tree is the
Externí odkaz:
http://arxiv.org/abs/2007.05958
Publikováno v:
Celest Mech Dyn Astr (2019) 131: 47
We study the post-encounter evolution of fictitious small bodies belonging to the so-called Line of Variations (LoV) in the framework of the analytic theory of close encounters. We show the consequences of the encounter on the local minimum of the di
Externí odkaz:
http://arxiv.org/abs/1910.01455
Autor:
Del Vigna, Alessio, Roa, Javier, Farnocchia, Davide, Micheli, Marco, Tholen, Dave, Guerra, Francesca, Spoto, Federica, Valsecchi, Giovanni Battista
Publikováno v:
A&A 627, L11 (2019)
Near-Earth asteroid (410777) 2009 FD is a potentially hazardous asteroid with potential impacts on Earth at the end of the 22nd century. The astrometry collected during the 2019 apparition provides information on the trajectory of (410777) by constra
Externí odkaz:
http://arxiv.org/abs/1906.05696
A slow triangle map with a segment of indifferent fixed points and a complete tree of rational pairs
We study the two-dimensional continued fraction algorithm introduced in \cite{garr} and the associated \emph{triangle map} $T$, defined on a triangle $\triangle\subset \R^2$. We introduce a slow version of the triangle map, the map $S$, which is ergo
Externí odkaz:
http://arxiv.org/abs/1904.07095
The completeness limit is a key quantity to measure the reliability of an impact monitoring system. It is the impact probability threshold above which every virtual impactor has to be detected. A goal of this paper is to increase the completeness wit
Externí odkaz:
http://arxiv.org/abs/1809.05790