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Properties of the dust in the coma of 67P/Churyumov-Gerasimenko observed with VIRTIS- M
Erard, S.; Piccioni, G.; Bieler, A. +16 more
An investigation is presented of the dust scattering in the coma of 67P/Churyumov-Gerasimenko for the dates of 2015 February 28, March 15 and April 27. A comparison of the morphology of dust continuum maps at 1.1 µm and gas emission shows that for the above dates the spatial distribution of the dust is strongly correlated with H2O…
On the Relationship Between G-Band Bright Point Dynamics and Their Magnetic Field Strengths
Yang, Yunfei; Ji, Kaifan; Feng, Song +4 more
G-band bright points (GBPs) are regarded as good manifestations of magnetic flux concentrations. We aim to investigate the relation between the dynamic properties of GBPs and their longitudinal magnetic field strengths. High spatial and temporal resolution observations were recorded simultaneously with G-band filtergrams and Narrow-band Filter Ima…
Saturn's quasiperiodic magnetohydrodynamic waves
Coates, A. J.; Dougherty, M. K.; Hospodarsky, G. B. +11 more
Quasiperiodic ∼1 h fluctuations have been recently reported by numerous instruments on board the Cassini spacecraft. The interpretation of the sources of these fluctuations has remained elusive to date. Here we provide an explanation for the origin of these fluctuations using magnetometer observations. We find that magnetic field fluctuations at h…
SOFIA Mid-infrared Imaging1 and CSO Submillimeter Polarimetry Observations of G034.43+00.24 MM1
Gehrz, R. D.; Vaillancourt, John E.; Shenoy, Dinesh +3 more
We present 11.1 to 37.1 µm imaging observations of the very dense molecular cloud core MM1 in G034.43+00.24 using FORCAST on SOFIA and submillimeter (submm) polarimetry using SHARP on the Caltech Submillimeter Observatory. We find that at the spatial resolution of SOFIA, the point-spread function (PSF) of MM1 is consistent with being a singl…
On the detectability of CO molecules in the interstellar medium via X-ray spectroscopy
García, Javier A.; Kallman, Timothy R.; Gatuzz, Efraín +1 more
We present a study of the detectability of CO molecules in the Galactic interstellar medium using high-resolution X-ray spectra obtained with the XMM-Newton Reflection Grating Spectrometer. We analysed 10 bright low mass X-ray binaries (LMXBs) to study the CO contribution in their line of sights. A total of 25 observations were fitted with the <…
The morphology of the topside ionosphere of Mars under different solar wind conditions: Results of a multi-instrument observing campaign by Mars Express in 2010
Fränz, M.; Pätzold, M.; Wild, J. A. +17 more
Since the internally-generated magnetic field of Mars is weak, strong coupling is expected between the solar wind, planetary magnetosphere, and planetary ionosphere. However, few previous observational studies of this coupling incorporated data that extended from the solar wind to deep into the ionosphere. Here we use solar wind, magnetosphere, an…
The mass-loss rates of red supergiants at low metallicity: detection of rotational CO emission from two red supergiants in the Large Magellanic Cloud
Matsuura, Mikako; Barlow, M. J.; Meixner, Margaret +9 more
Using the PACS and SPIRE spectrometers on-board the Herschel Space Observatory, we obtained spectra of two red supergiants (RSGs) in the Large Magellanic Cloud (LMC). Multiple rotational CO emission lines (J = 6-5 to 15-14) and 15 H2O lines were detected from IRAS 05280-6910, and one CO line was detected from WOH G64. This is the first …
Modeling the magnetospheric X-ray emission from solar wind charge exchange with verification from XMM-Newton observations
Palmroth, Minna; Milan, Steve E.; Carter, Jennifer A. +3 more
An MHD-based model of terrestrial solar wind charge exchange (SWCX) is created and compared to 19 case study observations in the 0.5-0.7 keV emission band taken from the European Photon Imaging Cameras on board XMM-Newton. This model incorporates the Global Unified Magnetosphere-Ionosphere Coupling Simulation-4 MHD code and produces an X-ray emiss…
Cassini plasma observations of Saturn's magnetospheric cusp
Coates, Andrew J.; Krupp, Norbert; Arridge, Christopher S. +6 more
The magnetospheric cusp is a funnel-shaped region where shocked solar wind plasma is able to enter the high-latitude magnetosphere via the process of magnetic reconnection. The plasma observations include various cusp signatures such as ion energy dispersions and diamagnetic effects. We present an overview analysis of cusp plasma observations at t…
Suzaku study on the ejecta of the supernova remnant G272.2-3.2
Katsuda, Satoru; Koyama, Katsuji; Uchida, Hiroyuki +5 more
We report reanalyses of the Suzaku observations of the Galactic supernova remnant (SNR) G272.2-3.2, for which previous studies were limited below 3 keV. With careful data reduction and background subtraction, we discover the K-shell lines of Ar, Ca, and Fe above 3 keV. The X-ray spectrum of G272.2-3.2 consists of two components, a low-temperature …