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Spectral Analysis of Mare Ingenii Basin (Lunar Farside)
Massironi, Matteo; Combe, Jean-Philippe; Tosi, Federico +8 more
Mare Ingenii is a site of great interest for lunar geology as it is one of the few basaltic plains on the farside of the Moon. It is located within the outer edge of the South Pole-Aitken basin, the largest and oldest impact basin in our Solar System. Mare Ingenii includes two large craters, Thomson and Thomson M, and a prominent swirl, a high-alb…
A deep Hα survey of the Carina tangent arm direction
Zavagno, A.; Elia, D.; Molinari, S. +3 more
Aims: The arm tangent direction provides a unique viewing geometry, with a long path in relatively narrow velocity ranges and lines of view that cross the arm perpendicular to its thickness. The spiral arm tangent regions are therefore the best directions for studying the interstellar medium within spiral density waves in the Milky Way, probi…
Statistical analysis of the probability of globular clusters interactions with each other and with the galactic centre according to Gaia DR2 data on the cosmological time scale
Ishchenko, M.; Sobolenko, M.; Berczik, P. +1 more
The main idea of the work is to study the dynamic evolution of the orbits of globular clusters (GCs) lookback in time obtained from the cosmological models that are closest to the potential of the Galaxy. This allows us to estimate the probability of close passages ("collisions") of the GC with each other and with the Galactic central in the Galax…
Stellar Proper Motion Study of Crowded Stellar Field of CSST
Tian, Hao; Zhang, Xin; Liu, Chao +7 more
The stellar absolute proper motion of crowded field is an important problem of astrometry. The space-based observation could get high spatially revolved images in the crowded field. The China Space Station Telescope (CSST) can provide high precision absolute proper motion that significantly improve the performance of HST and Gaia in the sky area a…
Apsidal motion in the α CrB binary system revealed through X-ray and optical eclipse timing
Schmitt, J. H. M. M.; Czesla, S.; Robrade, J. +1 more
The α CrB system is among the brightest known eclipsing binaries in an eccentric orbit. In such systems, the periods between successive primary (Pprim) and secondary minima (Psec) typically differ, and the difference between the two periods provides information on apsidal motion in the system. However, with a binary period of…
Possible merger signatures of the bulges of non-dwarf galaxies in the core of the Coma Cluster
Hasan, S. N.; Poloji, Nagamani; Hasan, Priya
In this paper, we discuss a method to study virialised clusters of galaxies with no-interaction features, like tails and bridges, using diagnostics of bulge classification and their properties, namely Sérsic index (n) and the Kormendy relation. We study a sample of non-dwarf galaxies in the core of the Coma Cluster using HST/ACS data. We divided o…
Spectroscopic and Photometric Study of the Eclipsing Binary Star sigma Aquilae
Quadri, U.; Strabla, L.; Franco, L.
We report on spectroscopic and photometric observations of the eclipsing binary star sigma Aquilae (44 Aql). Archival TESS and Hipparcos data are used to confirm the orbital period of 1.95028 ± 0.00002 days, consistent with previous measurements. Doppler shifts of the He I line at 4922 Angstroms from high-resolution spectroscopic data were used to…
Mineralogy of Surface Materials at the Chang'E-5 Landing Site and Possible Exotic Sources From In Situ Spectral Observations
Yang, Maosheng; Qian, Yuqi; Horgan, Briony +2 more
China's Chang'E-5 (CE-5) mission landed at 43.06°N and 51.92°W on 1 December 2020, within the Northern Oceanus Procellarum region of the Moon. The CE-5 landing site is situated within a young lunar basalt unit estimated to be around 2.0 Ga. A comprehensive understanding of the lunar regolith composition within the CE-5 region is pivotal as it furn…
Water vapor vertical distribution in the Martian atmosphere from TGO/NOMAD observations
Aoki, S.; Vandaele, A. C.; Daerden, F. +18 more
The water vapor in the Martian atmosphere plays a significant role in the planet's current and past climate, being crucial in important chemical processes like those involved in the stability of the CO$_{2}$. The recent ExoMars 2016 mission, with its NOMAD Solar Occultation channel spectrometer onboard the Trace Gas Orbiter, allowed us to measure …
Near-infrared Polarimetry and H2 Emission toward Massive Young Stars: Discovery of a Bipolar Outflow Associated to S235 e2s3
Ray, T. P.; Dewangan, L. K.; Luna, A. +3 more
We present a near-infrared H-band polarimetric study toward the S235 e2s3 protostar, obtained using the POLICAN instrument on the 2.1 m OAGH telescope. The images reveal a bipolar outflow with a total length of about 0.5 pc. The outflow nebulosity presents a high degree of linear polarization (~80%) and reveals a centrosymmetric pattern with the p…