Effects of dust layers on thermal emission from airless bodies

• 資料種別: 記事
• タイトル: Effects of dust layers on thermal emission from airless bodies
• 著者・編者: Jens Biele; Ekkehard Kührt; Hiroki Senshu
• 出版事項: 日本 : Springer Nature
• 出版年月日等: 2019-07-08
• 出版年（W3CDTF）: 2019-07-08
• タイトル（掲載誌）: Progress in earth and planetary science
• 巻号年月日等（掲載誌）: 6(48）
• 掲載巻: 6(48）
• ISSN（掲載誌）: 2197-4284
• ISSN-L（掲載誌）: 2197-4284
• 本文の言語コード: eng
• DOI: 10.1186/s40645-019-0291-0; https://doi.org/10.1186/s40645-019-0291-0
• 国立国会図書館永続的識別子: info:ndljp/pid/11340147; https://dl.ndl.go.jp/pid/11340147
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• 受理日（W3CDTF）: 2019-08-15T21:28:38+09:00
• 保存日（W3CDTF）: 2019-08-15
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• 要約等: We have investigated the influence of thin thermally opaque dust layers on the thermal emission of rocks and regolith and determined the thermal response of these dust-covered surfaces to diurnal insolation cycles. Results are computed for Hayabusa2's target asteroid (162173) Ryugu, which was observed by thermal infrared instruments on the orbiter and in situ. We show that even a very thin (10..100 mu m) fine-grained porous dust layer with thermal inertia of 25Jm(-2)K(-1)s(-1/2) can have a significant influence on surface temperatures and alter the apparent thermal inertia of the underlying material derived under the simplified assumption of a homogenous half space by more than 20%. The masking of the underlying material is complete at about 1 diurnal skin depth, corresponding to 10mm on Ryugu. Between 0.1 and 1 diurnal skin depths, we find a thermal lag smaller than what would be predicted for a surface consisting of dust only.If a dust cover were present on Ryugu, this should be clearly visible in the data returned by the orbiter's thermal infrared imager (TIR) and the MASCOT lander's radiometer (MARA), which observed a single boulder at the landing site. However, this appears not to be the case, and dust seems to play a minor role in the thermal emission from the asteroid.
• DOI: 10.1186/s40645-019-0291-0; https://doi.org/10.1186/s40645-019-0291-0
• オンライン閲覧公開範囲: インターネット公開
• 著作権情報: © The Author(s). 2019.; This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
• 関連情報: Effects of dust layers on thermal emission from airless bodies; https://cir.nii.ac.jp/crid/2120026414381664384
• 関連情報（URI）: https://hdl.handle.net/20.500.14094/90006218; http://id.ndl.go.jp/digimeta/11340147; https://dl.ndl.go.jp/pid/11340147; http://link.springer.com/content/pdf/10.1186/s40645-019-0291-0.pdf; http://link.springer.com/article/10.1186/s40645-019-0291-0/fulltext.html
• 参照: Thermophysical properties of the surface of asteroid 162173 Ryugu: Infrared observations and thermal inertia mapping; https://cir.nii.ac.jp/crid/1360009142703171968; Mid-infrared emissivity of partially dehydrated asteroid (162173) Ryugu shows strong signs of aqueous alteration; https://cir.nii.ac.jp/crid/1360013168826003712; MASCOT’s in situ analysis of asteroid Ryugu in the context of regolith samples and remote sensing data returned by Hayabusa2; https://cir.nii.ac.jp/crid/1360298754831415040; The MASCOT lander aboard Hayabusa2: The in-situ exploration of NEA (162173) Ryugu; https://cir.nii.ac.jp/crid/1360576120878550912; Comparison of optical spectra between asteroids Ryugu and Bennu: II. High-precision analysis for space weathering trends; https://cir.nii.ac.jp/crid/1360588380597062912; Anomalously porous boulders on (162173) Ryugu as primordial materials from its parent body; https://cir.nii.ac.jp/crid/1360853567433797504; Spectrophotometric Properties of 162173 Ryugu’s Surface from the NIRS3 Opposition Observations; https://cir.nii.ac.jp/crid/1360857593728891136; Highly porous nature of a primitive asteroid revealed by thermal imaging; https://cir.nii.ac.jp/crid/1361975843196180480; The MMX rover : performing in situ surface investigations on Phobos; https://cir.nii.ac.jp/crid/2050307417129956480
• 参照: International regolith science group (IRSG) in Hayabusa2 project, asteroid ryugu before the hayabusa2 encounter; https://cir.nii.ac.jp/crid/1050012570393147008; Hayabusa2 Mission Overview; https://cir.nii.ac.jp/crid/1050845763736009600; The Camera of the MASCOT Asteroid Lander on Board Hayabusa 2; https://cir.nii.ac.jp/crid/1360011142934340992; A new look at the statistical model identification; https://cir.nii.ac.jp/crid/1360011142937245312; Global Regolith Thermophysical Properties of the Moon From the Diviner Lunar Radiometer Experiment; https://cir.nii.ac.jp/crid/1360011144155739392; A Time-Dependent Model of Radiative and Conductive Thermal Energy Transport in Planetary Regoliths with Applications to the Moon and Mercury; https://cir.nii.ac.jp/crid/1360011145502200320; Thermal conductivity model for powdered materials under vacuum based on experimental studies; https://cir.nii.ac.jp/crid/1360283692083108736; Hayabusa2 arrives at the carbonaceous asteroid 162173 Ryugu—A spinning top–shaped rubble pile; https://cir.nii.ac.jp/crid/1360285710933540736; Thermal fatigue as the origin of regolith on small asteroids; https://cir.nii.ac.jp/crid/1360292617910460032; The thermal conductivity of meteorites: New measurements and analysis; https://cir.nii.ac.jp/crid/1360292617911145472; The significance of meteorite density and porosity; https://cir.nii.ac.jp/crid/1360292617913571584; Thermal and albedo mapping of the polar regions of Mars using Viking thermal mapper observations: 1. North polar region; https://cir.nii.ac.jp/crid/1360292619616174976; Thermophysical properties along Curiosity's traverse in Gale crater, Mars, derived from the REMS ground temperature sensor; https://cir.nii.ac.jp/crid/1360292620121507072; Mars surface thermal inertia and heterogeneities from OMEGA/MEX; https://cir.nii.ac.jp/crid/1360292620296569088; Micro-meteoroid seismic uplift and regolith concentration on kilometric scale asteroids; https://cir.nii.ac.jp/crid/1360292621414091392; MASCOT—The Mobile Asteroid Surface Scout Onboard the Hayabusa2 Mission; https://cir.nii.ac.jp/crid/1360565165385799936; Dust Phenomena Relating to Airless Bodies; https://cir.nii.ac.jp/crid/1360567181389222272; The geomorphology, color, and thermal properties of Ryugu: Implications for parent-body processes; https://cir.nii.ac.jp/crid/1360567185910270080; Low thermal conductivity boulder with high porosity identified on C-type asteroid (162173) Ryugu; https://cir.nii.ac.jp/crid/1360849943285208320; Stony meteorite thermal properties and their relationship with meteorite chemical and physical states; https://cir.nii.ac.jp/crid/1360855567869851520; The Thermophysical Properties of the Bagnold Dunes, Mars: Ground‐Truthing Orbital Data; https://cir.nii.ac.jp/crid/1360855568674240000; A thermal model of the Martian satellites; https://cir.nii.ac.jp/crid/1361137044955828096; Bright and dark regions on Mars: Particle size and mineralogical characteristics based on Thermal Emission Spectrometer data; https://cir.nii.ac.jp/crid/1361418519619022848; Thermophysical modelling for high-resolution digital terrain models; https://cir.nii.ac.jp/crid/1361418521040339072; Scaling forces to asteroid surfaces: The role of cohesion; https://cir.nii.ac.jp/crid/1361699993527620992; Apparent thermal inertia and the surface heterogeneity of Mars; https://cir.nii.ac.jp/crid/1361699993878916864; The effects of nonideal surfaces on the derived thermal properties of Mars; https://cir.nii.ac.jp/crid/1362262945712631168; Lunar equatorial surface temperatures and regolith properties from the Diviner Lunar Radiometer Experiment; https://cir.nii.ac.jp/crid/1362825896082975616; Microwave Imaging of Mercury's Thermal Emission at Wavelengths from 0.3 to 20.5 cm; https://cir.nii.ac.jp/crid/1363388843522172160; The porosity of the upper lunar regolith; https://cir.nii.ac.jp/crid/1363670319539945728; THERMAL TOMOGRAPHY OF ASTEROID SURFACE STRUCTURE; https://cir.nii.ac.jp/crid/1363951793610697344; Near-Surface Temperatures on Mercury and the Moon and the Stability of Polar Ice Deposits; https://cir.nii.ac.jp/crid/1363951794183402880; Daily temperature variations on Mars; https://cir.nii.ac.jp/crid/1364233269714195584; The presence and stability of ground ice in the southern hemisphere of Mars; https://cir.nii.ac.jp/crid/1364233271150112384
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• 書誌ID（NDLBibID）: 11340147; http://id.ndl.go.jp/bib/11340147
• NII論文ID: 120006708273