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Assessing Martian bedrock mineralogy through "windows" in the dust using near-infrared and thermal infrared remote sensing
Horgan, Briony; Bell, James F., III; Lai, Jason C. +1 more
Much of Mars' surface is mantled by bright dust, which masks the spectral features used to interpret the mineralogy of the underlying bedrock. Despite the wealth of near-infrared (NIR) and thermal infrared (TIR) data returned from orbiting spacecraft in recent decades, the detailed bedrock composition of approximately half of the Martian surface r…
Multiwavelength observations of the triple-peaked AGN Mrk 622
Jiménez-Bailón, E.; Binette, L.; González-Martín, O. +8 more
A detailed multiwavelength study of the properties of the triple-peaked active galactic nucleus (AGN) Mrk 622 showing different aspects of the nuclear emission region is presented. Radio, near- and mid-infrared, optical, and X-ray data have been considered for the analysis. In the optical, the WHAN diagnostic diagrams show that the three nuclear p…
On the age of the Beagle secondary asteroid family
Carruba, V.
The Beagle family is a C-type subgroup of the Themis family, in the outer main belt. Previous works suggested that it could be younger than 20 Myr and a possible source for the dust in the i ≃1.4∘ α zodiacal dust band. Here we took advantage of a much larger database for Beagle family members to revisit previous age estimates of this gr…
Transit timing variations, radial velocities, and long-term dynamical stability of the system Kepler-410
Kabáth, Petr; Skarka, Marek; Šubjak, Ján +6 more
Transit timing variations (TTVs) of Kepler-410Ab were already reported in a few papers. Their semi-amplitude is about 14.5 min. In our previous paper, we found that the TTVs could be caused by the presence of a stellar companion in this system. Our main motivation for this paper was to investigate variation in a radial-velocity (RV) curve generate…
Astroinformatics-based search for globular clusters in the Fornax Deep Survey
Paolillo, M.; Peletier, R.; Hilker, M. +15 more
In the last years, Astroinformatics has become a well-defined paradigm for many fields of Astronomy. In this work, we demonstrate the potential of a multidisciplinary approach to identify globular clusters (GCs) in the Fornax cluster of galaxies taking advantage of multiband photometry produced by the VLT Survey Telescope using automatic self-adap…
A New Type of Jet in a Polar Limb of the Solar Coronal Hole
Moon, Yong-Jae; Cho, Kyung-Suk; Kim, Yeon-Han +3 more
A new type of chromospheric jet in a polar limb of a coronal hole is discovered in the Ca II filtergram of the Solar Optical Telescope on board the Hinode. We identify 30 jets in a filtered Ca II movie with a duration of 53 minutes. The average speed at their maximum heights is found to be 132 ± 44 km s-1 ranging from 57 to 264 km s
Study of Interplanetary CMEs/Shocks During Solar Cycle 24 Using Drag-Based Model: The Role of Solar Wind
Shanmugaraju, A.; Vršnak, Bojan; Suresh, K. +2 more
In this paper we analyze a set of 27 fast interplanetary coronal mass ejections (ICMEs) observed during the period January 2010 - December 2013 in Solar Cycle 24. The arrivals of interplanetary shocks and CMEs at 1 AU are found from OMNI spacecraft high resolution data and their travel times are compared with Empirical Shock Arrival (ESA; Gopalswa…
Close up observation and inversion of low-altitude ENA emissions during a substorm event
McKenna-Lawlor, Susan; Lu, Li; Balaz, Jan
During a series of substorm events on November 12 2004, the Neutral Atom Detector Unit (NUADU) flying onboard the TC-2 spacecraft observed, close to perigee, bright low-altitude Energetic Neutral Atom (ENA) emissions from both north and south poles. Through utilizing high temporal and spatial resolution data inversion techniques we present here a …
The Difference Between Isolated Flux Transfer Events and Flux Transfer Event Cascades
Karlsson, T.; Kullen, A.; Thor, S.
This flux transfer event (FTE) study is based on 984 FTEs originally identified by Wang et al. (2005, https://doi:10.1029/2005JA011150) in Cluster data. Due to Cluster's orbit, the FTE list exclusively contains events detected at the high-latitude dayside magnetopause and low-latitude flanks. The focu…
Two Circumstellar Nebulae Discovered with the Wide-field Infrared Survey Explore and Their Massive Central Stars
Grebel, Eva K.; Castro, Norberto; Gvaramadze, Vasilii V. +1 more
We report the discovery of two mid-infrared nebulae in the northern hemisphere with the Wide-field Infrared Survey Explorer and the results of optical spectroscopy of their central stars, BD+60° 2668 (composed of two components, separated from each other by ≈3 arcsec) and ALS 19653, with the Calar Alto 3.5 m telescope and the Southern African Larg…