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首页> 美国政府科技报告 >First images of a possible CO()-tail of comet P/Schwassmann-Wachmann 1 observed against the dust coma background
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First images of a possible CO()-tail of comet P/Schwassmann-Wachmann 1 observed against the dust coma background

机译：彗星p / schwassmann-Wachmann 1的可能CO（） - 尾部的第一个图像观察到尘埃昏迷背景

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Comet P/Schwassmann-Wachmann 1 was observed with the 2m-Ritchey-Cretien Telescope of the Bulgarian National Observatory, Rozhen, Bulgaria, using the CCD-camera and focal reducer of the Max-Planck-Institute for Aeronomy. Images were taken in a red continuum window and in the 2-0 A(exp 2)Pi - X(exp 2)Sigma() band of CO() located in the blue part of the spectrum. The red images reveal an extended dust coma. From a comparison of the red and blue images a dust reddening of 13.2 percent per 1000 A is derived. At 642 nm the magnitude of the comet with a square diaphragm of 4.5 arcsec is 16.6. The blue images, taken in the CO() band, show a significantly different brightness distribution which is interpreted as presence of a CO() coma and tail superimposed on the continuum. A column density of several 10(exp 10) CO() molecules cm(exp -2) is derived. The tail thickness of 10(exp 5) km is unexpectedly small. We estimate the CO() production rate to about 6 x 10(exp 26) CO() particles s(exp -1). This value does not support the idea that the outbursts of this comet are caused by crystallization of amorphous water ice.

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