Depths of Copernican craters on lunar maria and highlands
| Autor: | Sergei I. Ipatov, E. A. Feoktistova |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Earth and Planetary Astrophysics (astro-ph.EP)
Lunar craters 010504 meteorology & atmospheric sciences Lunar mare FOS: Physical sciences Astronomy and Astrophysics 01 natural sciences Billion years law.invention Orbiter Altitude Impact crater Space and Planetary Science law 0103 physical sciences Earth and Planetary Sciences (miscellaneous) Altimeter 010303 astronomy & astrophysics Geomorphology Geology 0105 earth and related environmental sciences Copernican period Astrophysics - Earth and Planetary Astrophysics |
| Popis: | We present a study on the relationship between the ratio of the depth of a crater to its diameter and the diameter for lunar craters both on the maria and on the highlands. We consider craters younger than 1.1 billion years in age, i.e. of Copernican period. The aim of this work is to improve our understanding of such relationships based on our new estimates of the craters's depth and diameter. Previous studies considered similar relationships for much older craters (up to 3.2 billion years). We calculated the depths of craters with diameters from 10 to 100 km based on the altitude profiles derived from data obtained by the Lunar Orbiter Laser Altimeter (LOLA) onboard the Lunar Reconnaissance Orbiter (LRO). The ratio h/D of the depth h of a crater to its diameter D can diverge by up to a factor of two for craters with almost the same diameters. The linear and power approximations (regressions) of the dependence of h/D on D were made for simple and complex Copernican craters selected from the data from Mazrouei et al. (2019) and Losiak et al. (2015). For the separation of highland craters into two groups based only on their dependences of h/D on D, at D16 km. Depths of mare craters with D18 km are in a better agreement with the approximation curve of h/D vs. D for complex craters than for simple craters. At the same diameter, mare craters are deeper than highland craters at a diameter smaller than 30-40 km. For greater diameters, highland craters are deeper. Comment: 23 pages, 6 figures |
| Databáze: | OpenAIRE |
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