Pith Number

pith:IXTYCAQ6

pith:2026:IXTYCAQ6GOFDHQVKRKMU6CY7LT

not attested not anchored not stored refs pending

The Influence of the Fractal Dimension on Dust Evolution in Protoplanetary Disks

C. Dominik, C. P. Dullemond, J. E. Sch\"oll

Lower fractal dimensions allow dust aggregates to reach higher masses in protoplanetary disks but slow overall growth and do not help trigger streaming instability when collision velocities are assumed independent of porosity.

arxiv:2604.26794 v1 · 2026-04-29 · astro-ph.EP

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\usepackage{pith}
\pithnumber{IXTYCAQ6GOFDHQVKRKMU6CY7LT}

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Record completeness

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2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

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The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Claims

C1strongest claim

The dust evolution is strongly influenced by the fractal dimension. Although larger masses are reached for smaller fractal dimensions, the particles are still much smaller than planetesimals. Under the assumption that the bouncing/fragmentation velocity does not depend on the fractal dimension or filling factor, fractal growth is not beneficial for the streaming instability to occur in the case of fragmentation-limited growth and even disadvantageous in the case of bouncing-limited growth.

C2weakest assumption

The bouncing and fragmentation velocities are independent of fractal dimension or filling factor, combined with the decision to neglect the effect of porosity on collision outcomes while only including its effect on dynamics.

C3one line summary

Receipt and verification

First computed	2026-06-10T14:10:51.351397Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

45e781021e338a33c2aa8a994f0b1f5ce0cb16b6379872397718a97010ee52a5

Aliases

arxiv: 2604.26794 · arxiv_version: 2604.26794v1 · doi: 10.48550/arxiv.2604.26794 · pith_short_12: IXTYCAQ6GOFD · pith_short_16: IXTYCAQ6GOFDHQVK · pith_short_8: IXTYCAQ6

Agent API

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Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/IXTYCAQ6GOFDHQVKRKMU6CY7LT \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 45e781021e338a33c2aa8a994f0b1f5ce0cb16b6379872397718a97010ee52a5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "69ea521978606c16dba26e3ec583fb848f5cf5e7c0fc0af7d5162b4e8b4de085",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.EP",
    "submitted_at": "2026-04-29T15:25:44Z",
    "title_canon_sha256": "ca6375edd8b33fbc387643151ac8eedd1970dd4de73a270834fd29ec767de542"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2604.26794",
    "kind": "arxiv",
    "version": 1
  }
}