PMO OpenIR
Thermophysical characteristics of the large main-belt asteroid (349) Dembowska
Yu, Liang Liang1,2; Yang, Bin3,4; Ji, Jianghui2; Ip, Wing-Huen1,5
2017-12-01
Source PublicationMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
ISSN0035-8711
Volume472Issue:2Pages:2388-2397
Abstract

(349) Dembowska is a large, bright main-belt asteroid that has a fast rotation and an oblique spin axis. It might have experienced partial melting and differentiation. We constrain Dembowska's thermophysical properties, such as thermal inertia, roughness fraction, geometric albedo and effective diameter within 3s uncertainty of Gamma = 20(-7)(+12) Jm(-2) s(-0.5) K-1, fr = 0.25(-0.25)(+0.60), p(v) = 0.309(-0.038)(+0.026) and D-eff = 155.8(-6.2)(+7.5) km, by utilizing the advanced thermophysical model to analyse four sets of thermal infrared data obtained by the Infrared Astronomy Satellite (IRAS), AKARI, the Wide-field Infrared Survey Explorer (WISE) and the Subaru/Cooled Mid-Infrared Camera and Spectrometer (COMICS) at different epochs. In addition, by modelling the thermal light curve observed by WISE, we obtain the rotational phases of each data set. These rotationally resolved data do not reveal significant variations of thermal inertia and roughness across the surface, indicating that the surface of Dembowska should be covered by a dusty regolith layer with few rocks or boulders. Besides, the low thermal inertia of Dembowska shows no significant difference with other asteroids larger than 100 km, which indicates that the dynamical lives of these large asteroids are long enough to make their surfaces have sufficiently low thermal inertia. Furthermore, based on the derived surface thermophysical properties, as well as the known orbital and rotational parameters, we can simulate Dembowska's surface and subsurface temperatures throughout its orbital period. The surface temperature varies from similar to 40 to similar to 220 K, showing significant seasonal variation, whereas the subsurface temperature achieves equilibrium temperature about 120-160 K below a depth of 30-50 cm.

Keywordradiation mechanisms: thermal minor planets asteroids: individual: (349) Dembowska infrared: general
DOI10.1093/mnras/stx2089
WOS KeywordNEAR-EARTH ASTEROIDS ; THERMAL INERTIA ; SHAPE ; MODEL
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000413082900083
PublisherOXFORD UNIV PRESS
Citation statistics
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/22818
Collection中国科学院紫金山天文台
Corresponding AuthorYu, Liang Liang; Ji, Jianghui
Affiliation1.Macau Univ Sci & Technol, Space Sci Inst, Taipa, Macao, Peoples R China
2.Chinese Acad Sci, CAS Key Lab Planetary Sci, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China
3.European Southern Observ, Alonso Cordova 3107, Santiago 19001, Chile
4.Chinese Acad Sci, Yunnan Observ, Kunming 650011, Yunnan, Peoples R China
5.Natl Cent Univ, Inst Astron, Taoyuan 32001, Taiwan
Recommended Citation
GB/T 7714
Yu, Liang Liang,Yang, Bin,Ji, Jianghui,et al. Thermophysical characteristics of the large main-belt asteroid (349) Dembowska[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2017,472(2):2388-2397.
APA Yu, Liang Liang,Yang, Bin,Ji, Jianghui,&Ip, Wing-Huen.(2017).Thermophysical characteristics of the large main-belt asteroid (349) Dembowska.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,472(2),2388-2397.
MLA Yu, Liang Liang,et al."Thermophysical characteristics of the large main-belt asteroid (349) Dembowska".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 472.2(2017):2388-2397.
Files in This Item:
File Name/Size DocType Version Access License
2017180.pdf(1948KB)期刊论文作者接受稿开放获取CC BY-NC-SAView Application Full Text
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Yu, Liang Liang]'s Articles
[Yang, Bin]'s Articles
[Ji, Jianghui]'s Articles
Baidu academic
Similar articles in Baidu academic
[Yu, Liang Liang]'s Articles
[Yang, Bin]'s Articles
[Ji, Jianghui]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Yu, Liang Liang]'s Articles
[Yang, Bin]'s Articles
[Ji, Jianghui]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: 2017180.pdf
Format: Adobe PDF
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.