A New Indirect Method of Determining Density of Cometary Nuclei

Paradowski, M. L.

doi:10.32023/0001-5237/72.2.4

Artykuł - szczegóły

Tytuł artykułu

A New Indirect Method of Determining Density of Cometary Nuclei

Autorzy

Paradowski M. L.

Wybrane pełne teksty z tego czasopisma

http://acta.astrouw.edu.pl/

Identyfikatory

DOI

10.32023/0001-5237/72.2.4

Warianty tytułu

Języki publikacji

Abstrakty

A new indirect method for determining the bulk density of cometary nuclei is presented. This method has been applied to 136 comets taken from the literature. The method uses the calibration function in the form a₁=10.88526+3.39275×a₂ and the equation logD_N=a₂-0.13H, where D_N is the nucleus' diameter [km], and H is the comets' absolute total magnitude (coma + nucleus). To obtain the nuclear bulk density [kg/m3] the formula d=(6/π)×10^a where a=a₁-3a₂-9 is used. The mean nuclear bulk density of the 136 comets is 520±10 kg/m3. The relationship between the nuclear bulk density and the origin of the comets is found. For the 40 long-period comets the mean density is 470±10 kg/m3, whereas for the 94 short-period comets from Jupiter family it is 540±10 kg/m3. The accuracy of the calibration function is 1.5%.

Słowa kluczowe

methods: data analysis comets: general

Wydawca

Copernicus Foundation for Polish Astronomy

Czasopismo

Acta Astronomica

Rocznik

2022

Tom

Vol. 72, No. 2

Strony

141--159

Opis fizyczny

Bibliogr. 81 poz., tab., wykr.

Twórcy

autor

Paradowski M. L.

Institute of Physics, Maria Curie-Sklodowska University, M. Curie-Sklodowskiej Square 1, 20-031 Lublin, Poland

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