Synchronous satellites of Venus have long been thought unstable, but we use Poincare's surface section technique to show that synchronous quasi-satellites orbiting just outside Venus' Hill sphere are quite stable, at least for centuries. Such synchrosats always remain within a few degrees equator, and drift very slowly in longitude. These could be useful continuous monitoring points on surface,...

We study the properties of satellites in the environment of massive star-forming galaxies at z ∼ 1.8 in the COSMOS field, using a sample of 215 galaxies on the main sequence of star formation with an average mass of ∼1011 M . At z > 1.5, these galaxies typically trace halos of mass 10 M . We use optical-near-infrared photometry to estimate stellar masses and star formation rates (SFR) of centra...

Centriolar satellites are proteinaceous granules that are often clustered around the centrosome. Although centriolar satellites have been implicated in protein trafficking in relation to the centrosome and cilium, the details of their function and composition remain unknown. FOP (FGFR1 Oncogene Partner) is a known centrosome protein with homology to the centriolar satellite proteins FOR20 and O...

In the multi-satellite and multi-ground station downlink task scheduling problem, waiting time from proposal of to execution will affect its validity. If satellite has multiple communicable ground stations when is proposed, selection problem needs be solved first. After selection, since available conflict between tasks different satellites for same station, specific start should determined. To ...

We study the evolution of dark matter satellites orbiting inside more massive haloes using semi-analytical tools coupled with high-resolution N-Body simulations. We select initial satellite sizes, masses, orbital energies, and eccentricities as predicted by hierarchical models of structure formation. Both the satellite (of initial mass Ms,0) and the main halo (of mass Mh) are described by a Nav...