Perets, Hagai B., Gualandris, Alessia, Kupi, Gabor, Merritt, David, Alexander, Tal
We use N-body simulations to study the evolution of the orbital eccentricities of stars deposited near (
Classical Diffusion of a quantum particle in a noisy environment (2009)
Amir, Ariel, Lahini, Yoav, Perets, Hagai B.
We study the spreading of a quantum-mechanical wavepacket in a one-dimensional tight-binding model with a noisy potential, and analyze the emergence of classical diffusion from the quantum dynamics...
On the triple origin of blue stragglers (2009)
Perets, Hagai B., Fabrycky, Daniel C.
Blue straggler stars (BSSs) are stars observed to be hotter and bluer than other stars with the same luminosity in their environment. As such they appear to be much younger than the rest of the...
The Galactic potential and the asymmetric distribution of hypervelocity stars (2008)
Perets, Hagai B., Wu, Xufen, Zhao, HongSheng, Famaey, Benoit, Gentile, Gianfranco, Alexander, Tal
In recent years several hypervelocity stars (HVSs) have been observed in the halo of our Galaxy. Such HVSs have possibly been ejected from the Galactic center and then propagated in the Galactic...
The eccentric behavior of inclined binary minor planets (2008)
Perets, Hagai B., Naoz, Smadar
In recent years many binary minor planets (BMPs) have been discovered in the Solar system. Many models have been suggested for their formation, but these encounter difficulties explaining their...
Dynamical evolution of the young stars in the Galactic center (2008)
Perets, Hagai. B., Gualandris, Alessia, Merritt, David, Alexander, Tal
Recent observations of the Galactic center revealed a nuclear disk of young OB stars near the massive black hole (MBH), in addition to many similar outlying stars with higher eccentricities and/or...
Young stars observed in the distant Galactic halo are usually thought to have formed elsewhere, either in the Galactic disk or perhaps the Galactic center, and subsequently ejected at high velocities...
Dynamical and evolutionary constraints on the nature and origin of hypervelocity stars (2007)
In recent years several hypervelocity stars (HVSs) have been observed in the halo of our Galaxy. Such stars are thought to be ejected through dynamical interactions near the massive black hole (MBH)...
Getting a kick out of the stellar disk(s) in the galactic center (2007)
Perets, Hagai B., Kupi, Gabor, Alexander, Tal
Recent observations of the Galactic center revealed a nuclear disk of young OB stars, in addition to many similar outlying stars with higher eccentricities and/or high inclinations relative to the...
Temperature fluctuations of interstellar dust grains (2007)
Horn, Kobi, Perets, Hagai B., Biham, Ofer
The temperatures of interstellar dust grains are analyzed using stochastic simulations, taking into account the grain composition and size and the discreteness of the photon flux. [...] The...
Formation of molecular hydrogen on amorphous silicate surfaces (2007)
Li, Ling, Manico, Giulio, Congiu, Emanuele, Roser, Joe, Swords, Sol, Perets, Hagai B., ...
Experimental results on the formation of molecular hydrogen on amorphous silicate surfaces are presented and analyzed using a rate equation model. The energy barriers for the relevant diffusion and...
Realization of quantum walks with negligible decoherence in waveguide lattices (2007)
Perets, Hagai B., Lahini, Yoav, Pozzi, Francesca, Sorel, Marc, Morandotti, Roberto, Silberberg, Yaron
Quantum random walks are the quantum counterpart of classical random walks, and were recently studied in the context of quantum computation. A quantum random walker is subject to self interference,...
Massive perturbers and the efficient merger of binary massive black holes (2007)
Perets, Hagai B., Alexander, Tal
We show that dynamical relaxation in the aftermath of a galactic merger and the ensuing formation and decay of a binary massive black hole (MBH), are dominated by massive perturbers (MPs) such as...
Deterministic and Stochastic Simulations of Simple Genetic Circuits (2007)
Biham, Ofer, Balaban, Nathalie Q., Loinger, Adiel, Lipshtat, Azi, Perets, Hagai B.
We analyze three simple genetic circuits which involve transcriptional regulation and feedback: the autorepressor, the switch and the repressilator, that consist of one, two and three genes,...
Molecular Hydrogen Formation on Amorphous Silicates Under Interstellar Conditions (2007)
Perets, Hagai B., Lederhendler, Adina, Biham, Ofer, Vidali, Gianfranco, Li, Ling, Swords, Sol, ...
Experimental results on the formation of molecular hydrogen on amorphous silicate surfaces are presented for the first time and analyzed using a rate equation model. The energy barriers for the...
Massive perturbers in the galactic center (2006)
Perets, Hagai B., Hopman, Clovis, Alexander, Tal
We investigate the role of massive perturbers, such as giant molecular clouds or stellar clusters, in supplying low-angular momentum stars that pass very close to the central massive black hole (MBH)...
Massive perturber-driven interactions of stars with a massive black hole (2006)
Perets, Hagai B., Hopman, Clovis, Alexander, Tal
We study the role of massive perturbers (MPs) in deflecting stars and binaries to almost radial ("loss-cone") orbits, where they pass near the central massive black hole (MBH), interact with it at...
The formation of H_2 and HD with the master equation approach (2005)
Biham, Ofer, Lipshtat, Azi, Perets, Hagai B.
The formation of H2 and HD molecules on interstellar dust grains is studied using rate equation and master equation models. Rate equations are used in the analysis of laboratory experiments which...
Molecular Hydrogen Formation on Porous Dust Grains (2005)
Recent laboratory experiments on interstellar dust analogues have shown that H_2 formation on dust grain surfaces is efficient in a range of grain temperatures below 20 K. These results indicate that...
Modeling of negative autoregulated genetic networks in single cells (2005)
Lipshtat, Azi, Perets, Hagai B., Balaban, Nathalie Q., Biham, Ofer
We discuss recent developments in the modeling of negative autoregulated genetic networks. In particular, we consider the temporal evolution of the population of mRNA and proteins in simple networks...
Vidali, Gianfranco, Roser, Joe, Manico, Giulio, Pirronello, Valerio, Perets, Hagai B., Biham, Ofer
Molecular hydrogen has an important role in the early stages of star formation as well as in the production of many other molecules that have been detected in the interstellar medium. In this review...
Molecular Hydrogen Formation on Ice Under Interstellar Conditions (2004)
Perets, Hagai B., Biham, Ofer, Manico, Giulio, Pirronello, Valerio, Roser, Joe, Swords, Sol, ...
The results of experiments on the formation of molecular hydrogen on low density and high density amorphous ice surfaces are analyzed using a rate equation model. The activation energy barriers for...