A neck-line structure in the dust tail of Comet C/2004 F4 (Bradfield)

Autor:	L. Pansecchi, M. Scardia
Rok vydání:	2005
Předmět:	Physics Orbit Space and Planetary Science Sky Plane (geometry) media_common.quotation_subject Comet Line structure Astronomy Astronomy and Astrophysics Astrophysics media_common
Zdroj:	Astronomy & Astrophysics. 430:1129-1132
ISSN:	1432-0746 0004-6361
DOI:	10.1051/0004-6361:20041766
Popis:	Three CCD images of Comet C/2004 F4 (Bradfield), taken on three different dates close to the time of the Earth crossing through the plane of the comet orbit (2004 May 2.9280 UT), show a ray-shaped structure (RSS) in the dust tail, accompanied by a short, sunward spike (SWS). This morphology and behaviour strongly recall a Neck-Line Structure (NLS; Kimura & Liu 1977; Pansecchi et al. 1987). Astrometric measurements of the images show that, on all the three dates, the position on the sky of the observed RSS is consistent with several sky-projected points of a theoretical Neck-Line, computed for the precise date of each observation. Furthermore, the SWS turns out to be a real (not caused by perspective) antitail, which is predicted by NLS models.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::16c05e4a69d55a1d7ce89508abbc4bab https://doi.org/10.1051/0004-6361:20041766 Zobrazit plný text záznamu