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The Coronal Source of Extreme-ultraviolet Line Profile Asymmetries in Solar Active Region Outflows
Warren, Harry P.; Brooks, David H.
High-resolution spectra from the Hinode EUV Imaging Spectrometer have revealed that coronal spectral line profiles are sometimes asymmetric, with a faint enhancement in the blue wing on the order of 100 km s-1. These asymmetries could be important since they may be subtle yet diagnostically useful signatures of coronal heating or solar …
A broad iron line in LMC X-1
Steiner, James F.; Reis, Rubens C.; Fabian, Andrew C. +6 more
We present results from a deep Suzaku observation of the black hole in LMC X-1, supplemented by coincident monitoring with the Rossi X-ray Timing Explorer (RXTE). We identify broad relativistic reflection features in a soft disc-dominated spectrum. A strong and variable power-law component of emission is present which we use to demonstrate that en…
An extension of the DUSTY radiative transfer code and an application to OH 26.5 and TT Cygni
Groenewegen, M. A. T.
For the best-studied nearby Galactic asymptotic giant branch (AGB) stars a wealth of observational data is typically available in the form of photometry, often extending into the sub-mm, spectra covering a wide wavelength range, and often also visibility curves. Almost 100 AGB stars and red super giants have been imaged as part of the MESS Hersche…
The nucleus of Comet 67P/Churyumov-Gerasimenko. A new shape model and thermophysical analysis
Lowry, S.; Snodgrass, C.; Green, S. F. +5 more
Context. Comet 67P/Churyumov-Gerasimenko is the target of the European Space Agency Rosetta spacecraft rendez-vous mission. Detailed physical characteristation of the comet before arrival is important for mission planning as well as providing a test bed for ground-based observing and data-analysis methods.
Aims: To conduct a long-term observa…
Vertical structure of the Venus cloud top from the VeRa and VIRTIS observations onboard Venus Express
Pätzold, M.; Drossart, P.; Piccioni, G. +6 more
We investigate the Venus cloud top structure by joint analysis of the data from Visual and Thermal Infrared Imaging Spectrometer (VIRTIS) and the atmospheric temperature sounding by the Radio Science experiment (VeRa) onboard Venus Express. The cloud top altitude and aerosol scale height are derived by fitting VIRTIS spectra at 4-5 µm with t…
The Hubble Space Telescope Cluster Supernova Survey. II. The Type Ia Supernova Rate in High-redshift Galaxy Clusters
Gladders, M. D.; Panagia, N.; Huang, X. +41 more
We report a measurement of the Type Ia supernova (SN Ia) rate in galaxy clusters at 0.9 < z < 1.46 from the Hubble Space Telescope Cluster Supernova Survey. This is the first cluster SN Ia rate measurement with detected z > 0.9 SNe. Finding 8 ± 1 cluster SNe Ia, we determine an SN Ia rate of 0.50+0.23 -0.19 (stat)
Resolving the Galaxies within a Giant Lyα Nebula: Witnessing the Formation of a Galaxy Group?
Dey, Arjun; Jannuzi, Buell T.; Soifer, B. T. +8 more
Detailed analysis of the substructure of Lyα nebulae can put important constraints on the physical mechanisms at work and the properties of galaxies forming within them. Using high-resolution Hubble Space Telescope (HST) imaging of a Lyα nebula at z ≈ 2.656, we have taken a census of the compact galaxies in the vicinity, used optical/near-infrared…
Morphological Evolution of a Three-dimensional Coronal Mass Ejection Cloud Reconstructed from Three Viewpoints
Feng, L.; Inhester, B.; Wei, Y. +3 more
The propagation properties of coronal mass ejections (CMEs) are crucial to predict its geomagnetic effect. A newly developed three-dimensional (3D) mask fitting reconstruction method using coronagraph images from three viewpoints has been described and applied to the CME ejected on 2010 August 7. The CME's 3D localization, real shape, and morpholo…
A Deep, Wide-field, and Panchromatic View of 47 Tuc and the SMC with HST: Observations and Data Analysis Methods
Anderson, Jay; Dotter, Aaron; Rich, R. M. +10 more
In Hubble Space Telescope (HST) Cycle 17, we imaged the well-known globular star cluster 47 Tucanae for 121 orbits using the Wide Field Channel of the Advanced Camera for Surveys (ACS) and both the UV/visible (UVIS) and IR channels of the newly installed Wide Field Camera 3 (WFC3) instrument (GO-11677, PI: H. Richer). This unique data set was obta…
Major episodes of geologic history of Isidis Planitia on Mars
Hiesinger, H.; Ivanov, M. A.; Erkeling, G. +2 more
We have mapped the area of Isidis Planitia (1-27°N, 75-103°E) in order to assess the geologic history of this region using modern data sets such as MOLA topography and the high-resolution images provided by the HRSC, CTX, and HiRISE cameras. Results of our mapping show that the geologic history of Isidis Planitia consists of three principal episod…