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Swift J1734.5-3027: a new long Type-I X-ray bursting source
Romano, P.; Ferrigno, C.; Papitto, A. +3 more
Swift J1734.5-3027 is a hard X-ray transient discovered by Swift while undergoing an outburst in September 2013. Archival observations showed that this source underwent a previous episode of enhanced X-ray activity in 2013 May-June. In this paper we report on the analysis of all X-ray data collected during the outburst in 2013 September, the first…
Multiple origins for olivine at Copernicus crater
Head, James W.; Dhingra, Deepak; Pieters, Carle M.
Multiple origins for olivine-bearing lithologies at Copernicus crater are recognized based on integrated analysis of data from Chandrayaan-1 Moon Mineralogy Mapper (M3), Lunar Reconnaissance Orbiter (LRO) Narrow Angle Camera (NAC) and Kaguya Terrain Camera (TC). We report the diverse morphological and spectral character of previously kn…
A large-scale anomaly in Enceladus' microwave emission
Janssen, Michael; Ries, Paul A.
The Cassini spacecraft flew by Enceladus on 6 November 2011, configured to acquire synthetic aperture RADAR imaging of most of the surface with the RADAR instrument. The pass also recorded microwave thermal emission from most of the surface. We report on global patterns of thermal emission at 2.17 cm based on this data set in the context of additi…
The Properties of the Tilts of Bipolar Solar Regions
Tlatov, A.; Illarionov, E.; Sokoloff, D.
We investigate various properties associated with the tilt of isolated magnetic bipoles in magnetograms taken at the solar surface. We show that bipoles can be divided into two groups that have tilts of opposite signs, and reveal similar properties with respect to bipole area, flux, and bipolar moment. Detailed comparison of these physical quantit…
A network of filaments detected by Herschel in the Serpens core. A laboratory to test simulations of low-mass star formation
Eiroa, C.; Burkert, A.; Testi, L. +6 more
Context. Filaments represent a key structure during the early stages of the star formation process. Simulations show that filamentary structures commonly formed before and during the formation of cores.
Aims: The Serpens core is an ideal laboratory for testing the state of the art of simulations of turbulent giant molecular clouds.
Metho…
Fast damping of ultralow frequency waves excited by interplanetary shocks in the magnetosphere
Zong, Qiugang; Rankin, Robert; Wang, Chengrui
Analysis of Cluster spacecraft data shows that intense ultralow frequency (ULF) waves in the inner magnetosphere can be excited by the impact of interplanetary shocks and solar wind dynamic pressure variations. The observations reveal that such waves can be damped away rapidly in a few tens of minutes. Here we examine mechanisms of ULF wave dampin…
Star Formation in High-redshift Cluster Ellipticals
Moustakas, John; Dey, Arjun; Alberts, Stacey +11 more
We measure the star formation rates (SFRs) of massive (M sstarf > 1010.1 M ⊙) early-type galaxies (ETGs) in a sample of 11 high-redshift (1.0 < z < 1.5) galaxy clusters drawn from the IRAC Shallow Cluster Survey (ISCS). We identify ETGs visually from Hubble Space Telescope imaging and select likely cluster…
Possible temperate lakes on Titan
Sotin, Christophe; Barnes, Jason W.; Le Mouélic, Stéphane +5 more
We analyze southern mid-latitude albedo-dark features on Titan observed by Cassini's Visual and Infrared Mapping Spectrometer (VIMS). In exploring the nature of these features we consider their morphology, albedo, and specular reflectivity. We suggest that they represent candidates for potential temperate lakes. The presence of lakes at the mid-la…
The Megasecond Chandra X-Ray Visionary Project Observation of NGC 3115. II. Properties of Point Sources
Romanowsky, Aaron J.; Brodie, Jean P.; Remillard, Ronald A. +7 more
We carried out an in-depth study of low-mass X-ray binaries (LMXBs) detected in the nearby lenticular galaxy NGC 3115 using the Megasecond Chandra X-ray Visionary Project observation (total exposure time 1.1 Ms). In total we found 136 candidate LMXBs in the field and 49 in globular clusters (GCs) above 2σ detection, with 0.3-8 keV luminosity L
First Taste of Hot Channel in Interplanetary Space
Chen, Y.; Song, H. Q.; Cheng, X. +3 more
A hot channel (HC) is a high temperature (∼10 MK) structure in the inner corona first revealed by the Atmospheric Imaging Assembly on board the Solar Dynamics Observatory. Eruptions of HCs are often associated with flares and coronal mass ejections (CMEs). Results of previous studies have suggested that an HC is a good proxy for a magnetic flux ro…