First Detection of Visible Zodiacal Dust Bands from Ground-based Observations

Details First Detection of Visible Zodiacal Dust Bands from Ground-based Observations First Detection of Visible Zodiacal Dust Bands from Ground-based Observations

Jan 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999apj...511..432i&link_type=abstract

The Astrophysical Journal, Volume 511, Issue 1, pp. 432-435.

Astronomy and Astrophysics

Astronomy

11

Ism: Dust, Extinction, Interplanetary Medium, Meteors, Meteoroids, Solar System: General

Scientific paper

We present the first ground-based observational evidence of the zodiacal dust bands originally discovered by the Infrared Astronomical Satellite (IRAS) and confirmed by the Cosmic Background Explorer (COBE). Our photometric observations have been performed on Mauna Kea, Hawaii, between 1997 October 29 and November 2, using a 24 mm wide-angle lens attached to a cooled CCD camera, and a blue filter centered at 440 nm. Photometric data of the morning zodiacal light have revealed the presence of zodiacal dust bands at ecliptic latitudes beta=0^deg, 3 deg, and +/-10 deg, as well as additional faint structures at approximately beta=+/-5^deg, between solar elongations ɛ=75^deg and 90 deg. The brightness of dust bands is approximately 2%-3% of the background zodiacal light. Moreover, our observation of the Gegenschein has discovered dust bands at beta=+2^deg, -4 deg, and -9 deg at 165^deg<=ɛ<=185^deg. Using the separation of the inner dust band pair observed in two different regions of epsilon, we estimate the parallactic distance of this band pair to be about 1.6 AU from the Sun.

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