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Close Galactic Encounter Leaves "Nearly Naked" Supermassive Black Hole
Close Galactic Encounter Leaves Nearly Naked Supermassive Black Hole
2016/11/29
Astronomers using the super-sharp radio vision of the National Science Foundation's Very Long Baseline Array (VLBA) have found the shredded remains of a galaxy that passed through a larger galaxy, lea...
Young Stellar System Caught in Act of Forming Close Multiples
Young Stellar System Caught Forming Close Multiples
2016/11/4
For the first time, astronomers have seen a dusty disk of material around a young star fragmenting into a multiple-star system. Scientists had suspected such a process, caused by gravitational instabi...
Numerical predictions of surface effects during the 2029 close approach of Asteroid 99942 Apophis
Asteroids,dynamics Asteroids, surfaces Near-Earth objects Regoliths Tides,solid body
2015/12/25
Asteroid (99942) Apophis’ close approach in 2029 will be one of the most significant small-body encounter events in the near future and offers a good opportunity for in situ exploration to determine t...
A note on micro-instability for Hamiltonian systems close to integrable
micro-instability Hamiltonian systems close to integrable
2015/9/25
In this note, we consider the dynamics associated to a perturbation of an integrable Hamiltonian system in action-angle coordinates in any number of degrees of freedom and we prove the following resul...
Ambient vibration measurements in the Southern Rhine Graben close to Basle
H/V ratio ambient vibration array analysis fundamental frequency Rhine Rift Valley
2015/9/11
This study presents results of ambient noise measurements from temporary single station and small-scale array deployments in the northeast of Basle. H/V spectral ratios were determined along various p...
How Close a Bataknese One Another?: Study of Indonesian Batak’s Family Tree
family tree batak customary law scale-free network
2015/7/28
The paper conjectures some alternative acquisitions of mathematical models to see the Batak family tree that could enrich our understanding of the anthropological study of Bataknese people. We discuss...
For the first time, researchers have created a visual atlas and dictionary of terms for the many strange features on the fearsome-looking jaws of a little known group of arachnids. Called camel spider...
THE POTENTIAL OF NON-CONTACT CLOSE RANGE LASER SCANNERS FOR CULTURAL HERITAGE RECORDING
Laser scanners close range cultural heritage recording
2015/3/6
The use of laser scanning methods for the close range measurement of fixed objects has recently
become popular in the design and manufacture of automobiles, and in body scanning. Laser scanning
inst...
Chandra Observation of Supernova Remnant G54.1+0.3: A Close Cousin of the Crab Nebula
G54.1+0.3 jets and outfl ows
2014/12/26
We present a Chandra Advanced CCD Imaging Spectrometer observation of supernova remnant G54.1+0.3. This supernova remnant is resolved into several distinct X-ray-emitting components: a central bright ...
Perturbing E®ects of a Close Star on Relativistic Precessions of a Star in Galactic Center
black hole physics Galaxy:center relativity
2013/4/9
As proposed by Cli®ord M.Will, observations of the precessing orbits of a class of stars around the supermassive black hole in the galactic center with very short period(O(0:1) yr) could provide ...
First principles structures and circular dichroism spectra for the close-packed and the 7/2 motif of collagen
First principles structures circular dichroism spectra the 7/2 motif of collagen Biological Physics
2012/5/17
The recently proposed close-packed motif for collagen is investigated using first principles semi-empirical wave function theory and Kohn-Sham density functional theory. Under these refinements the cl...
Evidence for enhanced chromospheric Ca II H & K emission in stars with close-in extrasolar planets
Planets and satellites magnetic fields Planet star interactions chromospheres
2012/2/23
The planet-star interaction is manifested in many ways. It was found out that a close-in exoplanet causes small but measurable variability in the cores of a few lines in the spectra of several stars w...
Radius of Close-to-convexity of Harmonic Functions
Coefficient inequality partial sums radius of univalence analytic univalent convex and starlike harmonic functions
2011/8/24
Abstract: Let ${\mathcal H}$ denote the class of all normalized complex-valued harmonic functions $f=h+\bar{g}$ in the unit disk ${\mathbb D}$, and let $K=H+\bar{G}$ denote the harmonic Koebe function...
Strangeness Production close to Threshold in Proton-Nucleus and Heavy-Ion Collisions
Production close to Threshold Proton-Nucleus Heavy-Ion Collisions
2011/7/20
We discuss strangeness production close to threshold in p+A and A+A collision. Comparing the body of available K+, K0, K-, and Lambda data with the IQMD transport code and for some key observables as ...
Stripping a debris disk by close stellar encounters in an open stellar cluster
Stars : circumstellar matter surveys stars: low-mass planetary systems : formation
2011/9/28
A debris disk is a constituent of any planetary system surrounding a main sequence star. We study whether close stellar encounters can disrupt and strip a debris disk of its planetesimals in the expan...