干旱区生态环境知识资源中心(Arid): Using atmospheric impact data to model meteoroid close encounters

Arid

DOI	10.1093/mnras/staa2559
	Using atmospheric impact data to model meteoroid close encounters
	Shober, P. M.; Jansen-Sturgeon, T.; Bland, P. A.; Devillepoix, H. A. R.; Sansom, E. K.; Towner, M. C.; Cupak, M.; Howie, R. M.; Hartig, B. A. D.
通讯作者	Shober, PM
来源期刊	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
ISSN	0035-8711
EISSN	1365-2966
出版年	2020
卷号	498 期号:4 页码:5240-5250
英文摘要	Based on telescopic observations of Jupiter-family comets (JFCs), there is predicted to be a paucity of objects at sub-kilometre sizes. However, several bright fireballs and some meteorites have been tenuously linked to the JFC population, showing metre-scale objects do exist in this region. In 2017, the Desert Fireball Network (DFN) observed a grazing fireball that redirected a meteoroid from an Apollo-type orbit to a JFC-like orbit. Using orbital data collected by the DFN, in this study, we have generated an artificial data set of close terrestrial encounters that come within 1.5 lunar distances (LD) of the Earth in the size-range of 0.01-100 kg. This range of objects is typically too small for telescopic surveys to detect, so using atmospheric impact flux data from fireball observations is currently one of the only ways to characterize these close encounters. Based on this model, we predict that within the considered size-range 2.5 x 10(8) objects (0.1 per cent of the total flux) from asteroidal orbits (T-J > 3) are annually sent on to JFC-like orbits (2 < T-J < 3), with a steady-state population of about 8 x 10(13) objects. Close encounters with the Earth provide another way to transfer material to the JFC region. Additionally, using our model, we found that approximately 1.96 x 10(7) objects are sent on to Aten-type orbits and similar to 10(4) objects are ejected from the Solar system annually via a close encounter with the Earth.
英文关键词	meteorites, meteors, meteoroids minor planets, asteroids: general
类型	Article
语种	英语
开放获取类型	Green Submitted
收录类别	SCI-E
WOS记录号	WOS:000587755500045
WOS关键词	JUPITER-FAMILY COMETS ; ORBITAL DISTRIBUTION ; DISTRIBUTIONS ; ORIGIN ; SIZE ; POPULATION ; OBJECTS ; DEBRIS ; DECAY
WOS类目	Astronomy & Astrophysics
WOS研究方向	Astronomy & Astrophysics
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/327416
作者单位	[Shober, P. M.; Jansen-Sturgeon, T.; Bland, P. A.; Devillepoix, H. A. R.; Sansom, E. K.; Towner, M. C.; Cupak, M.; Howie, R. M.; Hartig, B. A. D.] Curtin Univ, Sch Earth & Planetary Sci, Space Sci & Technol Ctr, GPO Box U1987, Perth, WA 6845, Australia
推荐引用方式 GB/T 7714	Shober, P. M.,Jansen-Sturgeon, T.,Bland, P. A.,et al. Using atmospheric impact data to model meteoroid close encounters[J],2020,498(4):5240-5250.
APA	Shober, P. M..,Jansen-Sturgeon, T..,Bland, P. A..,Devillepoix, H. A. R..,Sansom, E. K..,...&Hartig, B. A. D..(2020).Using atmospheric impact data to model meteoroid close encounters.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,498(4),5240-5250.
MLA	Shober, P. M.,et al."Using atmospheric impact data to model meteoroid close encounters".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 498.4(2020):5240-5250.