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  1. OA@INAF
  2. PRODOTTI RICERCA INAF
  3. 1 CONTRIBUTI IN RIVISTE (Journal articles)
  4. 1.01 Articoli in rivista
Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12386/28340
Title: Radar evidence of subglacial liquid water on Mars
Authors: OROSEI, ROBERTO 
Lauro, S. E.
Pettinelli, E.
CICCHETTI, ANDREA 
Coradini, M.
Cosciotti, B.
Di Paolo, F.
Flamini, E.
Mattei, E.
PAJOLA, MAURIZIO 
Soldovieri, F.
CARTACCI, MARCO 
Cassenti, F.
FRIGERI, ALESSANDRO 
GIUPPI, Stefano 
Martufi, R.
Masdea, A.
Mitri, G.
Nenna, C.
NOSCHESE, RAFFAELLA 
Restano, M.
Seu, R.
Issue Date: 2018
Journal: SCIENCE 
Number: 361
Issue: 6401
First Page: 490
Abstract: The presence of liquid water at the base of the martian polar caps has long been suspected but not observed. We surveyed the Planum Australe region using the MARSIS (Mars Advanced Radar for Subsurface and Ionosphere Sounding) instrument, a low-frequency radar on the Mars Express spacecraft. Radar profiles collected between May 2012 and December 2015 contain evidence of liquid water trapped below the ice of the South Polar Layered Deposits. Anomalously bright subsurface reflections are evident within a well-defined, 20-kilometer-wide zone centered at 193°E, 81°S, which is surrounded by much less reflective areas. Quantitative analysis of the radar signals shows that this bright feature has high relative dielectric permittivity (>15), matching that of water-bearing materials. We interpret this feature as a stable body of liquid water on Mars.
Note: https://www.altmetric.com/details/45519784 In the top 5% of all research outputs scored by Altmetric Among the highest-scoring outputs from this source (#29 of 68,244) High Attention Score compared to outputs of the same age (99th percentile) High Attention Score compared to outputs of the same age and source (99th percentile)
URI: http://hdl.handle.net/20.500.12386/28340
URL: https://arxiv.org/abs/2004.04587
https://science.sciencemag.org/content/361/6401/490
ISSN: 0036-8075
DOI: 10.1126/science.aar7268
Bibcode ADS: 2018Sci...361..490O
Fulltext: open
Appears in Collections:1.01 Articoli in rivista

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