“CoKu Tau/4”的意思、由来-开放百科全书

词条

CoKu Tau/4

释义

References

{{no footnotes|date=April 2017}}{{Starbox short
| name = CoKu Tau/4
| constell =Taurus
| ra ={{RA|04|41|16.809}}
| dec ={{DEC|+28|39|59.99}}
| appmag_v =14.9
| absmag_v =
| dist_ly =~420
| dist_pc = ~130
| class =
| names =CoKu Tauri/4, CoKu Tau-Aur Star 4, HBC 421, 2MASS J04411681+2840000
| Simbad =CoKu_Tauri
| ARICNS =
| NSTED =
| EPE =
}}

CoKu Tau/4 is a pre-main-sequence binary T Tauri star system in the constellation Taurus. The stars are surrounded by a circumbinary disc with a central cavity of radius 10 astronomical units. Before its binary nature was known, the central cavity in the system's disc was thought to have been cleared out by a planet of at least 10 Jupiter masses, a rare example of a so-called "transitional disc". This model was disproven in 2008 when the star was resolved using adaptive optics as a system of two near-equal-mass stars with a projected separation of 8 AU. The central cavity is thus cleared out by the stars, not by the gravitational influence of a planet.

References

Ireland & Kraus (2008): The Disk Around CoKu Tauri/4: Circumbinary, Not Transitional
How Nature Builds a Planet{{dead link|date=August 2017 |bot=InternetArchiveBot |fix-attempted=yes }}, Adam Frank, Discover 26 (#7, July 2005); accessed online 1-II-2007.
On the Planet and the Disk of CoKu TAURI/4, Alice C. Quillen et al., Astrophysical Journal 612 (September 2004), pp. L137–L140; also [https://arxiv.org/abs/astro-ph/0406445 arXiv:astro-ph/0406445].
Pre-main sequence star Proper Motion Catalogue, C. Ducourant et al., Astronomy and Astrophysics 438 (August 2005), pp. 769–778.
Observational studies of pre-main-sequence evolution, Martin Cohen and Leonard V. Kuhi, Astrophysical Journal Supplement Series 41 (December 1979), pp. 743–843.

4 : Binary stars|T Tauri stars|Circumstellar disks|Taurus (constellation)

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