Atmospheric behavior and extreme beginning heights of the thirteen brightest photographic Leonid meteors from the ground‐based expedition to China

Spurný, Pavel; Betlem, Hans; Leven, Jaap van't; Jenniskens, Peter

doi:10.1111/j.1945-5100.2000.tb01773.x

Cited by 63 publications

(60 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…This result, in fact, sits well with the observations since we can be reasonably sure that of order one hundred gram and larger mass meteoroids do exist within the Leonid stream (see e.g., Spurny et al 2000 andBellot Rubio et al 2000).…”

Section: Discussionsupporting

confidence: 86%

Leonid electrophonic bursters

Beech

Foschini²

2001

A&A

View full text Add to dashboard Cite

Abstract. We investigate the conditions under which Leonid meteoroids might generate short duration (burster) electrophonic sounds. A "first order" theory is employed to estimate the approximate electron number density in the meteoroid ablation column as a function of time. Using the threshold conditions discussed in an earlier communication (Beech & Foschini 1999) we find that Leonid meteoroids more massive than about 0.1 kg can potentially generate short duration electrophonic bursters.

show abstract

Section: Discussionsupporting

confidence: 86%

Leonid electrophonic bursters

Beech

Foschini²

2001

A&A

View full text Add to dashboard Cite

show abstract

“…In addition, Perseids seem to be somewhat stronger on average than Leonids. This indication follows from the average light curve shape of faint meteors (Koten et al 2004), from the comparison of end heights of Perseids (Spurný 1995) and Leonids (Spurný et al 2000a), and from the meteoroid density estimates (Babadzhanov 2002).…”

Section: Halley-type Cometsmentioning

confidence: 99%

Properties of meteoroids from different classes of parent bodies

Borovička

2006

Proc. IAU

View full text Add to dashboard Cite

Abstract. Meteoroids observed to disintegrate in the terrestrial atmosphere can be directly linked to their parent bodies in case that they belong to certain meteor showers. We present a list of two dozens of parent bodies reliably associated with well recognized meteor showers. Among the parent bodies are long period comets, Halley-type comets, Jupiter family comets, comets of the inner solar system (such as 2P/Encke) and asteroids.Physical and chemical properties of meteoroids coming from various parents are compared on the basis of meteor heights, decelerations, light curves and spectra. Jupiter family comets produce meteoroids with the lowest strength, namely porous aggregates of dust grains with bulk densities of about 0.3 g cm −3 or less. Halley type material is somewhat stronger and the material related to comet Encke is even stronger. In addition, small strong constituents, perhaps similar to carbonaceous chondrites, can be encountered within the normal cometary material. The strength of cometary material is also enhanced by long-term exposure to cosmic rays and by solar heating in the vicinity to the Sun (r < 0.2 AU). Both these processes lead to the loss of volatile sodium. Southern δ-Aquariids, Geminids and partly also Quadrantids were influenced by solar radiation. We argue that these showers, the asteroids associated with them ((3200) Phaethon and 2003 EH 1), and the whole interplanetary complexes they belong to are of cometary origin. The argument is supported by lower than chondritic Fe/Mg ratio found in Geminids as well as in Halley type comets. The typical property of stony meteoroids of asteroidal origin is the presence of internal cracks which cause that the incoming meteoroids are much weaker than the recovered meteorites.

show abstract

“…Other parameters needed for computation were the ablation parameter, σ, and shape-density coefficient, K = AΓδ −2/3 . The ablation parameter was set to σ = 0.1 s 2 km −2 (Spurný et al 2000) …”

Section: The Fluxmentioning

confidence: 99%

Radar observation of the Leonids in 1998 and 1999

Šimek

Pećina

2001

A&A

View full text Add to dashboard Cite

Abstract.Results of Ondřejov radar observations of Leonid meteor shower in 1998 and 1999 are presented. It was found that while the activity in 1998 was dominated by the long-duration echoes resulting in a low mass distribution index averaged over an interval 23 h UT November 16 to 12 h UT November 17 as s = 1.23±0.02 with the peak at L = 234.• 633 ± 0.• 004. The 1999 activity culminated at L = 235.• 285 ± 0.• 002 and was mainly due to prevailing of fainter echoes yielding a mean mass distribution index s = 1.58± 0.05 between 23 h UT November 17 8 h UT November 18. The activity pattern in 1998 showed a multiple peak structure while the corresponding 1999 pattern showed only one distinct peak. The 1998 activity rates were lower than those in 1999 by the ratio of 2.8. Our observations indicate that the main outburst of this Leonid return occurred in 1999. The 1998 activity is characterized by a large scatter of observed hourly echo counts while the ones in 1999 possessed only one sharp maximum. The flux curve in 1998 shows multiple peak character while in 1999 the activity patterns of echoes with duration in excess of 0.4 s even though their peaks do not coincide generally with the activity maxima. The 1998 flux reached 3.34 10 −12 m −2 s −1 for a limiting mass of m0 = 10 −5 kg while for 1999 it was determined as 37.41 10 −12 m −2 s −1 .

show abstract

Atmospheric behavior and extreme beginning heights of the thirteen brightest photographic Leonid meteors from the ground‐based expedition to China

Cited by 63 publications

References 8 publications

Leonid electrophonic bursters

Leonid electrophonic bursters

Properties of meteoroids from different classes of parent bodies

Radar observation of the Leonids in 1998 and 1999

Contact Info

Product

Resources

About