Dust production in the debris disk around HR 4796 A
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Peer-reviewed
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Abstract
Debris disks are the natural by-products of the planet formation process.
Scattered or polarized light observations are mostly sensitive to small dust
grains that are released from the grinding down of bigger planetesimals. High
angular resolution observations at optical wavelengths can provide key
constraints on the radial and azimuthal distribution of the small dust grains.
These constraints can help us better understand where most of the dust grains
are released upon collisions. We present SPHERE/ZIMPOL observations of the
debris disk around HR 4796 A, and model the radial profiles along several
azimuthal angles of the disk with a code that accounts for the effect of
stellar radiation pressure. This enables us to derive an appropriate
description for the radial and azimuthal distribution of the small dust grains.
Even though we only model the radial profiles along (or close to) the
semi-major axis of the disk, our best-fit model is not only in good agreement
with our observations but also with previously published datasets (from near-IR
to sub-mm wavelengths). We find that the reference radius is located at
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1432-0746
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European Commission (312430)
Science and Technology Facilities Council (ST/S000623/1)