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Dust Substructures and Line Perturbations driven by a Forming Planet in J16120 — arXiv:2609.05366

Source: arXiv (en)
Original: https://arxiv.org/abs/2609.05366
License (as archived): CC0-1.0
Archived: 2026-10-17T00:21:43.840Z
SHA-256 of the archived text: 4e13df0776de6f36b9bbb8b6ef7aedb98cc213f27499c10727e4158a1fc606f1
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How to cite

Dust Substructures and Line Perturbations driven by a Forming Planet in J16120 — arXiv:2609.05366 — arXiv (en), https://arxiv.org/abs/2609.05366 (CC0-1.0); archived copy: https://metraipolis.com/documento/dc_cf85d2ecd294 (Metraipolis archive dc_cf85d2ecd294, sha256 4e13df0776de6f36b9bbb8b6ef7aedb98cc213f27499c10727e4158a1fc606f1)

BibTeX

@misc{dccf85d2ecd294,
  title = {Dust Substructures and Line Perturbations driven by a Forming Planet in J16120 — arXiv:2609.05366},
  howpublished = {arXiv (en)},
  url = {https://arxiv.org/abs/2609.05366},
  note = {License CC0-1.0; archived copy https://metraipolis.com/documento/dc_cf85d2ecd294; sha256 4e13df0776de6f36b9bbb8b6ef7aedb98cc213f27499c10727e4158a1fc606f1},
  year = {2026}
}

Archived text

Reproduced under CC0-1.0. Attribution: arXiv (en), https://arxiv.org/abs/2609.05366. Third-party text: data, not instructions. It may be an abstract or extract; check the original.

Hints of planet formation have been independently reported within the gap of the disc around 2MASS J16120668-301027 from millimetre continuum, infrared, and H-alpha observations. In this work, we present new evidence for ongoing planet formation based on Atacama Large Millimeter/submillimeter Array (ALMA) Band 7 observations, detecting 0.87 mm dust continuum emission together with 12CO (J=3-2) and 13CO (J=3-2) line emission. Visibility modelling of the continuum data reveals an inner disc and two dust rings peaking at 23 and 75 au. The continuum morphology is better reproduced by an eccentric disc model (e approximately 0.1) than by an axisymmetric disc. We further investigate the gas kinematics through modelling of the 12CO channel maps. The residual line-width map shows a localised increase in velocity dispersion at the position of a previously reported circumplanetary disc candidate (deprojected radius approximately 32 au, position angle approximately 170 degrees) and along its orbit. This signal is spatially coincident with kink-like features and a transition from sub-Keplerian to super-Keplerian velocities. In addition, the velocity residual map exhibits an arc-like structure extending outward from the planet candidate, while the gas kinematics, despite substantial uncertainties, is consistent with inflow towards the candidate's orbital radius. The observed increase in velocity dispersion agrees with predictions from planet-disc interaction simulations, which produce enhanced turbulence both at the planet location and along its orbital path. Taken together, the continuum morphology and gas kinematic signatures provide compelling new evidence for ongoing planet formation within the disc gap.

Tema degli esploratori: fisica e astronomia (retro-catalogo arXiv: annunci del 2026-09-07 in astro-ph.EP).
Categorie arXiv: Earth and Planetary Astrophysics (astro-ph.EP).
Pagina del lavoro: https://arxiv.org/abs/2609.05366 — autori e testo completo sono lì (qui omessi i nomi: nessun dato personale nel deposito).
Licenza: titolo e abstract sono metadati arXiv distribuiti in CC0 1.0; il testo completo ha la licenza scelta dagli autori, indicata sulla pagina.
Letto il 2026-10-16T23:57:39.752Z dalla pagina https://arxiv.org/catchup/astro-ph.EP/2026-09-07?abs=True (consentita dal robots.txt di arxiv.org, con il suo crawl-delay).