We use direct N-body simulations to study the inspiral and internal evolution of dense star clusters near the Galactic center. These clusters sink toward the center due to dynamical friction with the stellar background, and may go into core collapse before being disrupted by the Galactic tidal field. If a cluster reaches core collapse before disruption, its dense core, which has become rich in ...

In the inner solar system, the planets' orbits evolve chaotically, driven primarily by secular chaos. Mercury has a particularly chaotic orbit and is in danger of being lost within a few billion years. Just as secular chaos is reorganizing the solar system today, so it has likely helped organize it in the past. We suggest that extrasolar planetary systems are also organized to a large extent by...

Spatially-resolved spectroscopy of the elliptical galaxy M 87 with the MECS instrument on board BeppoSAX demonstrates that the hard X-ray power-law tail, originally discovered by ASCA (Matsumoto et al 1996; Allen et al. 1999), originates in the innermost 2. Our results are consistent with it being produced in an Accretion Dominated Flow, although a substantial jet contribution cannot be ruled o...

Abstract We consider three corrections to the disk sizes estimated at a given frequency using accretion models. They are due color correction, truncation an inner radius larger than innermost stable circular orbit, and winds, which we apply standard model. our results estimates of based on microlensing. find that these effects combined can explain long-standing problem from microlensing being t...

We explore how the internal structure of a test particle affects its equatorial stable circular orbits around Kerr black hole with or without cosmological constant. To this end, we first explicitly write equations motion for in pole-dipole-quadrupole approximation specifying quadrupole momentum tensor to spin-induced model. Then calculate characteristic quantities -- radius, angular momentum, e...

This paper investigates the distribution of focus-related accents in the broad focus domain in Chinese Mandarin through 300 natural sentences. The results show that focus –related accent tends to be assigned to the predicate in a subject-predicate structure, to the object in a predicate-object structure, and to the head in an adjunct-head structure unless the head is highly predictable. From th...

We investigate the modularity behaviour of termination and connuence properties of (join) conditional term rewriting systems. We give counterexamples showing that the properties weak termination, weak innermost termination and (strong) innermost termination are not preserved in general under signature extensions. Then we develop suucient conditions for the preservation of these properties under...

Abstract: In this work, we present the results of our multi-band microvariability study of the famous blazar BL Lac. We performed microvariablity observations of the source in the optical VRI bands for four nights in 2016. We studied the intranight flux and spectral variability of the source in detail with an objective to characterize microvariability in the blazars, a frequently observed pheno...

In data from three clear nights of a WHT/UES run in 2000 Oct/Nov, and using improved Doppler tomographic signal-analysis techniques, we have carried out a deep search for starlight reflected from the innermost of υ (upsilon) And’s three planets. We place upper limits on the planet’s radius Rp as functions of its projected orbital velocity Kp ≈ 139 sin i km s for various assumptions about the wa...

What are relativistic jets like within a million Schwarzschild radii of the accreting black hole that powers them? A meeting in Granada, Spain in June 2013, organized by José L. Gómez and his conspirators brought together observers and theorists to survey the current state of observational data and efforts to interpret them. This conference summary reviews the results, insights, arguments, conf...