Search Publications
Origin and Ion Charge State Evolution of Solar Wind Transients during 4 - 7 August 2011
Slemzin, V.; Goryaev, F.; Pagano, P. +5 more
We present a study of the complex event consisting of several solar wind transients detected by the Advanced Composition Explorer (ACE) on 4 - 7 August 2011, which caused a geomagnetic storm with Dst =−110 nT. The supposed coronal sources, three flares and coronal mass ejections (CMEs), occurred on 2 - 4 August 2011 in active region (AR) 11261. To…
ALMA Observations of the Interaction of a Radio Jet with Molecular Gas in Minkowski's Object
Nyland, Kristina; Lacy, Mark; Croft, Steve +2 more
We use the Atacama Large Millimeter Array (ALMA) to detect and image CO (1-0) emission from Minkowski’s Object, a dwarf galaxy in the cluster Abell 194 that is interacting with a radio jet from a nearby elliptical galaxy. The ALMA observations, which are the first to detect molecular gas in Minkowski’s Object, also image the high-frequency continu…
Impact of a cometary outburst on its ionosphere. Rosetta Plasma Consortium observations of the outburst exhibited by comet 67P/Churyumov-Gerasimenko on 19 February 2016
Altwegg, K.; Tsurutani, B. T.; Nilsson, H. +15 more
We present a detailed study of the cometary ionospheric response to a cometary brightness outburst using in situ measurements for the first time. The comet 67P/Churyumov-Gerasimenko (67P) at a heliocentric distance of 2.4 AU from the Sun, exhibited an outburst at ~1000 UT on 19 February 2016, characterized by an increase in the coma surface bright…
Origin of warm and hot gas emission from low-mass protostars: Herschel-HIFI observations of CO J = 16-15. I. Line profiles, physical conditions, and H2O abundance
Maret, S.; van Dishoeck, E. F.; Evans, N. J. +18 more
Context. Through spectrally unresolved observations of high-J CO transitions, Herschel Photodetector Array Camera and Spectrometer (PACS) has revealed large reservoirs of warm (300 K) and hot (700 K) molecular gas around low-mass protostars. The excitation and physical origin of this gas is still not understood.
Aims: We aim to shed light on …
A Potential Recoiling Supermassive Black Hole, CXO J101527.2+625911
Kim, D. -C.; Kim, Ji Hoon; Privon, G. C. +4 more
We have carried out a systematic search for recoiling supermassive black holes (rSMBH) using the Chandra Source and SDSS Cross-Match Catalog. From the survey, we have detected a potential rSMBH, CXO J101527.2+625911, at z = 0.3504. The source CXO J101527.2+625911 has a spatially offset (1.26 ± 0.05 kpc) active SMBH and kinematically offset broad e…
Characteristics that Produce White-light Enhancements in Solar Flares Observed by Hinode/SOT
Masuda, Satoshi; Watanabe, Kyoko; Kitagawa, Jun
To understand the conditions that produce white-light (WL) enhancements in solar flares, a statistical analysis of visible continuum data as observed by Hinode/Solar Optical Telescope (SOT) was performed. In this study, approximately 100 flare events from M- and X-class flares were selected. The time period during which the data were recorded span…
Cosmology with the cosmic microwave background temperature-polarization correlation
Couchot, F.; Henrot-Versillé, S.; Perdereau, O. +4 more
We demonstrate that the cosmic microwave background (CMB) temperature-polarization cross-correlation provides accurate and robust constraints on cosmological parameters. We compare them with the results from temperature or polarization and investigate the impact of foregrounds, cosmic variance, and instrumental noise. This analysis makes use of th…
Observation of Three-Dimensional Magnetic Reconnection in the Terrestrial Magnetotail
Xu, Xiaojun; Lapenta, Giovanni; Huang, Shiyong +7 more
Study of magnetic reconnection has been focused on two-dimensional geometry in the past decades, whereas three-dimensional structures and dynamics of reconnection X line are poorly understood. In this paper, we report Cluster multispacecraft observations of a three-dimensional magnetic reconnection X line with a weak guide field ( 25% of the upstr…
Spectroscopy of Very Hot Plasma in Non-flaring Parts of a Solar Limb Active Region: Spatial and Temporal Properties
Teriaca, Luca; Testa, Paola; Petralia, Antonino +4 more
In this work we investigate the thermal structure of an off-limb active region (AR) in various non-flaring areas, as it provides key information on the way these structures are heated. In particular, we concentrate on the very hot component (> 3 {MK}) as it is a crucial element to distinguish between different heating mechanisms. We present an …
Mapping the three-dimensional dust extinction towards the supernova remnant S147 - the S147 dust cloud
Huang, Y.; Chen, B. -Q.; Wang, C. +7 more
We present a three-dimensional (3D) extinction analysis in the region towards the supernova remnant (SNR) S147 (G180.0-1.7) using multiband photometric data from the Xuyi Schmidt Telescope Photometric Survey of the Galactic Anticentre (XSTPS-GAC), 2MASS and WISE. We isolate a previously unrecognized dust structure likely to be associated with SNR …