Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004mnras.348.1395b&link_type=abstract
Monthly Notices of the Royal Astronomical Society, Volume 348, Issue 6, pp. 1395-1400.
Astronomy and Astrophysics
Astronomy
4
Comets: General, Comets: Individual: 109P/Swift-Tuttle, Meteors, Meteoroids
Scientific paper
A search for metre-sized and larger exo-atmosphere Perseid meteoroids via their surface reflected sunlight has been made with the 1.2-m Elginfield Telescope. A total survey time of 9.66 h was accumulated during the nights of 2002 August 10, 11 and 12. To a limiting apparent magnitude of +17, we made no distinct detection of any large exo-atmosphere Perseid meteoroids. Our telescopic survey results constrain the upper limit to the spatial number density of metre-sized and larger Perseid meteoroids to be less than ~3 × 10-3 per 109 km3. We have also analysed a data set of possible in-atmosphere Perseid fireball events detected by space-based optical and infrared sensors. Operating at a detection threshold of magnitude -17, the space-based sensors have detected eight possible Perseid fireballs in the 15-d window, centred on the time of shower maximum, over the cumulative time interval from 1978 August to 2000 August. The space-based sensor data yield a spatial number density of ~7 × 10-8 per 109 km3 for metre-sized and larger Perseid meteoroids.
Beech Martin
Brown Peter
Illingworth Alison
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