Three tails of comet Hale‐Bopp

@article{Wilson1998ThreeTO,
  title={Three tails of comet Hale‐Bopp},
  author={J. K. Wilson and Jeffrey Baumgardner and Michael Mendillo},
  journal={Geophysical Research Letters},
  year={1998},
  volume={25}
}
We report on the imaging detection of the sodium tail of comet Hale‐Bopp using large field‐of‐view, multi‐wavelength observations from the McDonald Observatory in March 1997. We subtract off‐band images from sodium‐filter images to obtain the atomic sodium tail, and we find it to be more extended in width than either the dust or ion tails. The cross‐tail integrated brightness of the sodium tail increases with distance from the nucleus for at least 8 million km. The direction of the sodium tail… 

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References

SHOWING 1-10 OF 23 REFERENCES

Neutral Sodium from Comet Hale-Bopp: A Third Type of Tail

We report on the discovery and analysis of a striking neutral sodium gas tail associated with comet C/1995 O1 Hale-Bopp. Sodium D line emission has been observed at heliocentric distance r≤1.4 AU in

Sodium D-line emission in Comet West (1975n) and the sodium source in Comets

A spectrum of the sodium D-line emission from Comet West (1975n) taken at heliocentric distance 1.4 AU is analyzed by comparing the D-line brightness to that in the underlying continuum. Using the

The spatial distribution of gaseous atomic sodium in the comae of comets: Evidence for direct nucleus and extended plasma sources

Abstract Sodium D-line emission (5890 and 5896 A) has been observed in bright comets at small to moderate heliocentric distances for many years. We present here the first in depth study of a set of

Imaging observations of the extended sodium atmosphere of the Moon

Pilot ground-based optical imaging observations of the extended lunar environment were conducted at McDonald Observatory in February 1991. One set of images taken on February 20 revealed emission at

The extended sodium nebula of Jupiter

THE detection of a cloud of neutral sodium near Jupiter's moon Io1 has led to the use of sodium as a tracer of processes in the jovian environment. Although relatively rare in the Io–Jupiter system,

A THEORY OF DUST COMETS

Abstract : A model based on kinetic and fluid dynamic concepts is formulated for the head and tail regions of dust comets. In the model, dust particles having a wide distribution of sizes are

Optical properties of cometary dust

Abstract : Cometary dust is observed in a variety of ways: scattered light, thermal emission, stellar occultations, dust coma and tail morphology, radar echos, and meteors associated with comets. To