NDLI: Sungrazing dust particles against the sporadic meteor background

Content Provider	Springer Nature Link
Author	Golubaev, A. V.
Copyright Year	2015
Abstract	From the results of the statistical study, the genetic relation between some meteors (from −5$^{ m }$ to +5$^{ m }$) of the sporadic background and the comets of the Kreutz, Marsden, and Kracht families has been revealed. The radiants of sporadic meteors are concentrated at the geocentric ecliptic latitudes 7°–10° northward and southward of the ecliptic. The radiants of the sungrazing meteoroids, that were detected on their heliocentric orbits “before” and “after” the perihelion passage, are concentrated in the elongation intervals of approximately 120°–165° and 20°–60° from the Sun, respectively. Each of the specified radiant regions, in its turn, breaks up into two groups. The group of radiants with elongations of about 30° and 155° from the Sun belongs to the Marsden and Kracht cometary families, while the group with 50° and 135°, to the Kreutz cometary family. In the distribution by perihelion distance, a sharp decrease of the number of observed dust particles with q < 0.08 AU was found. This corresponds to the heliocentric distances (20–30 R $_{⊙}$), where the production of microscopic dust due to sublimation of cometary nuclei, while approaching the Sun, terminates. The number of sporadic sungrazing meteoroids detected after their passage in the vicinity of the Sun is approximately 20 times smaller than the number of similar particles in the preperihelion part of the trajectory. This result is of special importance for studying the thermodesorption effect of meteoroids (i.e., the change in the content of chemical elements in meteoroids as a function of the perihelion distance).
Starting Page	226
Ending Page	236
Page Count	11
File Format	PDF
ISSN	00380946
Journal	Solar System Research
Volume Number	49
Issue Number	4
e-ISSN	16083423
Language	English
Publisher	Pleiades Publishing
Publisher Date	2015-07-25
Publisher Place	Moscow
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	meteors meteoroids sporadic meteors meteor showers of cometary origin radiants periodic showers chemical composition Astronomy, Astrophysics and Cosmology Planetology Astronomy, Observations and Techniques Astrophysics and Astroparticles
Content Type	Text
Resource Type	Article
Subject	Astronomy and Astrophysics Space and Planetary Science

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