The RSL@Ω project: investigation on Martian Recurring Slope Lineae formation mechanisms in lab experiments
| Title: | The RSL@Ω project: investigation on Martian Recurring Slope Lineae formation mechanisms in lab experiments |
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| Authors: | Leseigneur, Yann; Conway, Susan; Roelofs, Lonneke; Vincendon, Mathieu; Sylvest, Matthew |
| Contributors: | SYSTEME SOLAIRE - LATMOS; Laboratoire Atmosphères, Observations Spatiales (LATMOS); Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS); Laboratoire de Planétologie et Géosciences UMR_C 6112 (LPG); Le Mans Université (UM)-Université d'Angers (UA)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Nantes université - UFR des Sciences et des Techniques (Nantes univ - UFR ST); Nantes Université - pôle Sciences et technologie; Nantes Université (Nantes Univ)-Nantes Université (Nantes Univ)-Nantes Université - pôle Sciences et technologie; Nantes Université (Nantes Univ)-Nantes Université (Nantes Univ); Universiteit Utrecht / Utrecht University Utrecht; Institut d'astrophysique spatiale (IAS); Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Centre National d’Études Spatiales Paris (CNES); The Open University Milton Keynes, UK (OU) |
| Source: | SF2A 2025 ; https://hal.science/hal-05095643 ; SF2A 2025, Jul 2025, Toulouse, France |
| Publisher Information: | CCSD |
| Publication Year: | 2025 |
| Collection: | Université de Versailles Saint-Quentin-en-Yvelines: HAL-UVSQ |
| Subject Terms: | [SDU]Sciences of the Universe [physics] |
| Subject Geographic: | Toulouse; France |
| Description: | International audience ; The Recurring Slope Lineae (RSL) are seasonal linear dark movements of dozens of meters (see Figure 1) that occur on steep slopes of Mars (> 30°). Since their first discovery in 2011 [1] using the very high resolution HiRISE camera on board Mars Reconnaissance Orbiter (MRO, NASA), there is debate about the nature of these movements. Firstly, studies suggest that the RSL are liquid water flows [1, 2] or brines [3, 4, 5, 6, 7, 8]. These hypotheses have been challenged by other studies showing: no detected water associated with RSL (detection threshold fixed a limit at 0.5-3% of the RSL mass) [9], the surface temperature of some RSL sites are below the water fusion point [10], no main detection of salts has been made, and the RSL geomorphology can also correspond to dry movements [11]. Secondly, some studies support the idea that RSL are dry movements which mobilise sand [12] and/or dust [13, 14, 15, 16, 17]. This hypothesis is now privileged by the community, and some formation mechanisms have been proposed: initiation by winds [13, 18], by dust devils, or by gas flux from the surface (Knudsen pump [10]). However, from orbital data, it is complex to verify if the proposed mechanism can explain the RSL for different RSL sites (large diversity of RSL) and also to know which is the main-transported material (dust, sand), as the quantity of matter transported (e.g., which can be very small [18]). From this conclusion, we suggest that one way to better understand the RSL formation mechanisms is to develop lab experiments to better understand what happens precisely in these movements. |
| Document Type: | conference object |
| Language: | English |
| Availability: | https://hal.science/hal-05095643; https://hal.science/hal-05095643v1/document; https://hal.science/hal-05095643v1/file/abstract_SF2A_2025_RSL_v2.pdf |
| Rights: | https://about.hal.science/hal-authorisation-v1/ ; info:eu-repo/semantics/OpenAccess |
| Accession Number: | edsbas.E3927C25 |
| Database: | BASE |