The thermal and physical characteristics of the Gao-Guenie (H5) meteorite

• Published in: Planetary and space science Vol. 57; no. 7; pp. 764 - 770
• Main Authors: Beech, Martin, Coulson, Ian M., Nie, Wenshuang, McCausland, Phil
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.06.2009
• Subjects: Asteroids: Thermal models; Dynamics (YORP); Jilin; Meteorites: Gao-Guenie; Physical characteristics; Sikhote-Alin; Meteorites: Gao-Guenie; Dynamics (YORP); Sikhote-Alin; Jilin; Physical characteristics; Asteroids: Thermal models
• ISSN: 0032-0633; 1873-5088
• DOI: 10.1016/j.pss.2009.01.002

Measurements of the bulk density, grain density, porosity, and magnetic susceptibility of 19 Gao-Guenie H5 chondrite meteorite samples are presented. We find average values of bulk density 〈 ρ bulk〉=3.46±0.07 g/cm 3, grain density 〈 ρ grain〉=3.53±0.08 g/cm 3, porosity 〈 P(%)〉=2.46±1.39, and bulk mass magnetic susceptibility 〈log χ〉=5.23±0.11. Measurements of the specific heat capacity for a 3.01-g Gao-Guenie sample, a 61.37-g Gao-Guenie sample, a 62.35-g Jilin H5 chondrite meteorite sample, and a 51.37-g Sikhote-Alin IIAB Iron meteorite sample are also presented. Temperature interpolation formula are further provided for the specific heat capacity, thermal conductivity, and thermal diffusivity of the 3.01-g Gao-Guenie sample in the temperature range 300< T (K)<800. We briefly review the possible effects of the newly deduced specific heat and thermal conductivity values on the ablation of meteoroids within the Earth's atmosphere, the modeling of asteroid interiors and the orbital evolution of meteoroids through the Yarkovsky-O’Keefe-Radzievskii-Paddack (YORP) effect.