Are cometary dust Mars loss rates deduced from optical emissions reliable?

Title:

Are cometary dust Mars loss rates deduced from optical emissions reliable?

Creator:

Crifo, J. F.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:8903f31a-22e1-48fa-8dae-9bc4a7b912d9
uuid:8903f31a-22e1-48fa-8dae-9bc4a7b912d9

Subject:

astrophysics, Comet Halley, and cometary dust

Type:

model:article and TEXT

Format:

bez média and svazek

Description:

We present additional evidence in support of our prevlous work (Crifo, 1987 bc) in which, from theoretical fits to Comet Halley near -to far- infrared emissions, based on the in-situ flyby probes data, we estimated that the comet was losing half or more of its mass under the form of large (> 1 gram) grains of small (0.3 g cm-^3) density. We confirm that the comet dust-to-gas mass loss rate ratio lies somewhere between the values 0.80 and 18.6, with a best estimate at 3.46. We discuss this result in the context of the general agreement that comets loose less than half of their total mass loss in dust, and this dominantly at very smáli grain sizes. We trace this agreement back to overconfidence placed in a model size distribution which inherently excludes substantial mass loss in large grains without appropriate experimental justification.

Language:

Czech

Rights:

http://creativecommons.org/publicdomain/mark/1.0/
policy:public

Coverage:

59-66

Source:

Publications of the Astronomical Institute of the Academy of Sciences of the Czech Republic | 1987 Volume:63-70 | Number:67

Harvested from:

CDK

Metadata only:

false