Search Publications
A Solar Eruption with Relatively Strong Geoeffectiveness Originating from Active Region Peripheral Diffusive Polarities
Wang, Rui; Liu, Ying D.; Hu, Huidong +1 more
We report the observations of a moderate but relatively intense geoeffective solar eruption on 2015 November 4 from the peripheral diffusive polarities of active region 12443. We use space-borne Solar Dynamics Observatory and ACE observations. EUV images identified a helical pattern along a filament channel, and we regard this channel as flux-rope…
Density response to magnetic field fluctuation in the foreshock plasma
Narita, Yasuhito; Hada, Tohru
The foreshock plasma exhibits large-amplitude disturbance in the plasma density and the magnetic field. The question of the density response to the magnetic field fluctuation is addressed and studied observationally and statistically using the in situ Cluster spacecraft data of the foreshock plasma. Three major findings are obtained. First, the de…
The Intricate Structure of HH 508, the Brightest Microjet in the Orion Nebula
Kim, Jinyoung Serena; Close, Laird M.; Males, Jared R. +2 more
We present Magellan adaptive optics Hα imaging of HH 508, which has the highest surface brightness among protostellar jets in the Orion Nebula. We find that HH 508 actually has a shorter component to the west, and a longer and knotty component to the east. The east component has a kink at 0.″3 from the jet-driving star θ 1 Ori B2
Dynamics and Origin of Comets: New Problems Appeared after the Rosetta Space Mission
Emel'yanenko, V. V.
The data obtained in the recent Rosetta space mission to comet 67P/Churyumov-Gerasimenko have had a profound impact on the understanding of the nature of comets. In addition to revising the notions on the physical properties and structure of comets, this addresses dynamical aspects of the formation of the observed cometary populations (short- and …
On-Board Telemetry Monitoring via Support Vector Machine with Application to Philae Solar Generator
Infantolino, G. M.; Di Lizia, P.; Topputo, F. +1 more
Recent developments in machine learning for anomaly detection make it possible to use spacecraft status telemetry to produce sophisticated system health monitoring applications, that can run autonomously on-board. Both archived and simulated data are used to train intelligent algorithms to automatically detect and classify anomalous time series of…
Stereo topographic mapping concept for the upcoming Luna-Resurs-1 orbiter mission
Oberst, J.; Polyansky, I.; Zhukov, B. +4 more
We report on the Lunar Stereo Topographic Camera (LSTC), currently being developed for the upcoming Luna-Resurs-1 Orbiter mission, which will perform observations from an orbit with the altitude to be optimized in the range from 50 to 100 km. The LSTC is composed of two identical optical heads and a common data processing unit. Each optical head h…
Analysis of identification of digital images from a map of cosmic microwaves
Skeivalas, J.; Turla, V.; Jurevicius, M. +1 more
This paper discusses identification of digital images from the cosmic microwave background radiation map formed according to the data of the European Space Agency "Planck" telescope by applying covariance functions and wavelet theory. The estimates of covariance functions of two digital images or single images are calculated according to the rando…
Gas compression and likely triggered star formation in the infrared bubble N107
Yuan, Jing-Hua; Li, Jin-Zeng; Ren, Zhi-Yuan +2 more
The expansion of HII regions can regulate the evolution of their natal clouds and the star formation therein. Infrared dust bubbles, which are frequently associated with HII regions, are ideal laboratories to test whether impulse(s) driven by the expanding bubbles enhances or suppresses star-formation. In this work, we present a comprehensive stud…
Suzaku observation of the eclipsing high mass X-ray binary pulsar XTE J1855-026
Paul, Biswajit; Devasia, Jincy
We report results from analysis performed on an eclipsing supergiant high mass X-ray binary pulsar XTE J1855-026 observed with the X-ray Imaging Spectrometer (XIS) on-board Suzaku Observatory in April 2015. Suzaku observed this source for a total effective exposure of
GALEX far-ultraviolet observations of metal-poor subdwarfs
Smith, Graeme H.
Far-ultraviolet photometry derived from the GALEX satellite observatory has been compiled for a sample of metal-poor subdwarfs with