Search Publications
Strong Spatial Aggregation of Martian Surface Temperature Shaped by Spatial and Seasonal Variations in Meteorological and Environmental Factors
Li, Fei; Barriot, Jean-Pierre; Luo, Yao-Wen +1 more
Spatio-temporal variation in the Martian surface temperature (MST) is an indicator of ground level thermal processes and hence a building block for climate models. However, the distribution of MST exhibits different levels of spatial aggregation or heterogeneity, and varies in space and time. Furthermore, the effect of regional differences in mete…
Generation and Optimization of Spectral Cluster Maps to Enable Data Fusion of CaSSIS and CRISM Datasets
Thomas, Nicolas; Rossi, Angelo Pio; Fernandes, Michael +2 more
Four-band color imaging of the Martian surface using the Color and Stereo Surface Imaging System (CaSSIS) onboard the European Space Agency's ExoMars Trace Gas Orbiter exhibits a high color diversity in specific regions. Not only is the correlation of color diversity maps with local morphological properties desirable, but mineralogical interpretat…
Venus mountain waves in the upper atmosphere simulated by a time-invariant linear full-wave spectral model
Schubert, Gerald; Navarro, Thomas; Walterscheid, Richard L. +1 more
A 2-D spectral full-wave model is described that simulates the generation and propagation of mountain waves over idealized topography in Venus' atmosphere. Modeled temperature perturbations are compared with the Akatsuki observations. Lower atmosphere eddy diffusivity and stability play a major role in the upward propagation of gravity waves from …
A census of young stellar objects in two line-of-sight star-forming regions toward IRAS 22147+5948 in the outer Galaxy
Szczerba, Ryszard; Elia, Davide; Fischer, William J. +9 more
Context. Star formation in the outer Galaxy, namely, outside of the Solar circle, has not been extensively studied in part due to the low CO brightness of the molecular clouds linked with the negative metallicity gradient. Recent infrared surveys provide an overview of dust emission in large sections of the Galaxy, but they suffer from cloud confu…
Identifying Shadowing Signatures of C Ring Ringlets and Plateaus in Cassini Data from Saturn's Ionosphere
Vigren, Erik; Wahlund, Jan-Erik; Dreyer, Joshua +5 more
For orbits 288 and 292 of Cassini's Grand Finale, clear dips (sharp and narrow decreases) are visible in the ${{\rm{H}}}_{2}^{+}$ densities measured by the Ion and Neutral Mass Spectrometer (INMS). In 2017, the southern hemisphere of Saturn was shadowed by its rings and the substructures within. Tracing a path of the solar photons through the ring…
A GMOS/IFU Study of Jellyfish Galaxies in Massive Clusters
Lee, Myung Gyoon; Lee, Jeong Hwan; Kang, Jisu +2 more
Jellyfish galaxies are an intriguing snapshot of galaxies undergoing ram pressure stripping (RPS) in dense environments, showing spectacular star-forming knots in their disks and tails. We study the ionized gas properties of five jellyfish galaxies in massive clusters with Gemini GMOS/Integral Field Unit observations: MACSJ0916-JFG1 (z = 0.330), M…
Generation of Large-Scale Orthophoto Mosaics Using MEX HRSC Images for the Candidate Landing Regions of China's First Mars Mission
Geng, Xun; Xu, Qing; Wang, Jiayao +3 more
Improved Model of X-Ray Emission from Hot Accretion Flows
Zdziarski, Andrzej A.; Szanecki, Michał; Niedźwiecki, Andrzej +1 more
We have developed an improved model of X-ray emission from optically thin, two-temperature accretion flows, kerrflow, using an exact Monte Carlo treatment of global Comptonization as well as with a fully general relativistic description of both the radiative and hydrodynamic processes. It also includes pion-decay electrons, whose synchrotron emiss…
Molecular Clouds Associated with H II Regions and Candidates within l = 106.°65 to 109.°50 and b = -1.°85 to 0.°95
Zheng, Yu-Qing; Wang, Hong-Chi; Ma, Yue-Hui +3 more
We present a large-scale simultaneous survey of the CO isotopologues (12CO, 13CO, and C18O) J = 1-0 line emission toward the Galactic plane region of l = 106.°65 to 109.°50 and b = -1.°85 to 0.°95 using the Purple Mountain Observatory 13.7 m millimeter-wavelength telescope. Except for the molecular gas in the solar…
Catching the Butterfly and the Homunculus of η Carinae with ALMA
Gull, Theodore R.; Menten, Karl M.; Toalá, Jesús A. +7 more
The nature and origin of the molecular gas component located in the circumstellar vicinity of η Carinae are still far from being completely understood. Here, we present Atacama Large Millimeter/submillimeter Array CO(3-2) observations with a high angular resolution (~0.″15) and a great sensitivity that are employed to reveal the origin of this com…