Pith Number

pith:Q5IONUON

pith:2026:Q5IONUONOR6VJLHF4CPR7J7GZP

not attested not anchored not stored refs resolved

Spinning out of focus: The challenge of rotational line broadening in exoplanet reflection spectroscopy

A. Kaminski, A. Quirrenbach, A. Reiners, A. Schweitzer, D. Cont, D. Montes, E. Nagel, E. Palle, F. Yan, G. Bergond, G. Morello, I. Ribas, J. A. Caballero, K. Molaverdikhani, L. Nortmann, P. J. Amado, S. Czesla, Th. Henning, T. O. Winterhalder, V. J. S. B\'ejar

Rotational broadening hides reflected exoplanet signals unless properly modeled in misaligned systems.

arxiv:2605.16491 v1 · 2026-05-15 · astro-ph.EP

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{Q5IONUONOR6VJLHF4CPR7J7GZP}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

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 injection-recovery test reveals the critical importance of taking rotational broadening into account when dealing with systems featuring rapidly rotating stars and large spin-orbit misalignments.

C2weakest assumption

That the modeled rotational broadening kernel and the injected signal template accurately represent the true reflected spectrum shape and noise properties in the CARMENES KELT-9 time series.

C3one line summary

Introduces a reflection spectroscopy metric and uses KELT-9 injection-recovery tests to demonstrate that rotational line broadening from rapid stellar rotation and large misalignments must be included when assessing detectability of exoplanet reflected spectra.

References

129 extracted · 129 resolved · 34 Pith anchors

[1] Clouds in the atmospheres of extrasolar planets. II. Thermal emission spectra of Earth-like planets influenced by low and high-level clouds · doi:10.1051/0004-6361/201014343

[2] Albedo and Reflection Spectra of Extrasolar Giant Planets · doi:10.1086/309160

[3] The Albedos of Kepler's Close-in super-Earths 2041 · doi:10.1088/2041-8205/789/1/l20

[4] Reflected Spectroscopy of Small Exoplanets II: Characterization of Terrestrial Exoplanets. , keywords =. doi:10.3847/1538-3881/ac6b97 , archivePrefix =. 2204.13816 , primaryClass = · doi:10.3847/1538-3881/ac6b97

[5] 2020, AJ, 159, 175, doi: 10.3847/1538-3881/ab79a5 2003 · doi:10.3847/1538-3881/ab79a5

Receipt and verification

First computed	2026-05-20T00:02:25.166983Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8750e6d1cd747d54ace5e09f1fa7e6cbf4345ab5642494ef9be81d8e45e40a8c

Aliases

arxiv: 2605.16491 · arxiv_version: 2605.16491v1 · doi: 10.48550/arxiv.2605.16491 · pith_short_12: Q5IONUONOR6V · pith_short_16: Q5IONUONOR6VJLHF · pith_short_8: Q5IONUON

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/Q5IONUONOR6VJLHF4CPR7J7GZP \
  | 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: 8750e6d1cd747d54ace5e09f1fa7e6cbf4345ab5642494ef9be81d8e45e40a8c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1a63edab514613aeff3418c7972cda62ab0ed55aa1b85f8dd1293e4391dbde94",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.EP",
    "submitted_at": "2026-05-15T18:00:01Z",
    "title_canon_sha256": "094d5c8f3b0073bbdc5fe379028a3beb5c41e0f3f6c3f391eb107ba28e74f67b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2605.16491",
    "kind": "arxiv",
    "version": 1
  }
}