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Detection of meteoroid hypervelocity impacts on the Cluster spacecraft: First results
Mann, Ingrid; Vaverka, Jakub; Pellinen-Wannberg, Asta +5 more
We present the first study of dust impact events on one of the Earth-orbiting Cluster satellites. The events were identified in the measurements of the wide band data (WBD) instrument on board the satellite operating in monopole configuration. Since 2009 the instrument is operating in this configuration due to the loss of three electric probes and…
Nature of shocks revealed by SOFIA OI observations in the Cepheus E protostellar outflow
Godard, B.; Codella, C.; Benedettini, M. +12 more
Context. Protostellar jets and outflows are key features of the star-formation process, and primary processes of the feedback of young stars on the interstellar medium. Understanding the underlying shocks is necessary to explain how jet and outflow systems are launched, and to quantify their chemical and energetic impacts on the surrounding medium…
Magnetic topological analysis of coronal bright points
Madjarska, M. S.; Huang, Z.; Wiegelmann, T. +2 more
Context. We report on the first of a series of studies on coronal bright points which investigate the physical mechanism that generates these phenomena.
Aims: The aim of this paper is to understand the magnetic-field structure that hosts the bright points.
Methods: We use longitudinal magnetograms taken by the Solar Optical Telescope wit…
The dependence of halo mass on galaxy size at fixed stellar mass using weak lensing
Hudson, Michael J.; Balogh, Michael L.; Charlton, Paul J. L. +1 more
Stellar mass has been shown to correlate with halo mass, with non-negligible scatter. The stellar mass-size and luminosity-size relationships of galaxies also show significant scatter in galaxy size at fixed stellar mass. It is possible that, at fixed stellar mass and galaxy colour, the halo mass is correlated with galaxy size. Galaxy-galaxy lensi…
Occurrence frequency and location of magnetic islands at the dayside magnetopause
Allen, R. C.; Fuselier, S. A.; Trattner, K. J. +2 more
Simulations of magnetic reconnection often predict the formation of magnetic islands forming and propagating out through the reconnection exhaust region. However, to date, only a few observations of magnetic islands at the Earth's magnetopause have been identified and analyzed. Crossings near reconnection sites at the dayside magnetopause by Clust…
Hubble Space Telescope Imaging of the Ultra-compact High Velocity Cloud AGC 226067: A Stripped Remnant in the Virgo Cluster
Crnojević, D.; Sand, D. J.; Simon, J. D. +10 more
We analyze the optical counterpart to the ultra-compact high velocity cloud AGC 226067, utilizing imaging taken with the Advanced Camera for Surveys (ACS) on the Hubble Space Telescope. The color-magnitude diagram of the main body of AGC 226067 reveals an exclusively young stellar population, with an age of ∼7-50 Myr, and is consistent with a meta…
The Asymmetric Bow Shock/Pulsar Wind Nebula of PSR J2124-3358
Slane, Patrick; Romani, Roger W.; Green, Andrew W.
We describe new measurements of the remarkable Hα/UV/X-ray bow shock and pulsar wind nebula (PWN) of the isolated millisecond pulsar (MSP) PSR J2124-3358. Chandra X-ray Observatory imaging shows a one-sided jet structure with a softer equatorial outflow. KOALA integral field unit spectroscopy shows that non-radiative emission dominates the bow sho…
Solar Tornadoes Triggered by Interaction between Filaments and EUV Jets
Zhang, Jun; Yan, Xiaoli; Xue, Jianchao +2 more
We investigate the formations and evolutions of two successive solar tornadoes in/near AR 12297 during 2015 March 19-20. Recurrent EUV jets close to two filaments were detected along a large-scale coronal loop prior to the appearances of the tornadoes. Under the disturbances from the activities, the filaments continually ascended and finally inter…
Atmospheric Photochemistry
Lefèvre, Franck; Krasnopolsky, Vladimir
Jets of SS 433 on scales of dozens of parsecs
Panferov, Alexander A.
Context. The radio nebula W 50 harbours the relativistic binary system