{
  "annotation_id": "339ae9cf-c3ae-48bd-862f-c585e1a3531e",
  "date_created": "2026-02-17T05:53:19.899000Z",
  "date_modified": "2026-02-17T05:53:19.899000Z",
  "file_hash": "6ac8e286de6055af2a09a69817f2dac881c75e6946a777b07e4f48d5134e4a52",
  "private": false,
  "record": {
    "abstract": "We present an updated characterization of the planetary system orbiting the nearby M2 dwarf GJ 3090 (TOI-177; $d = 22$ pc), based on new high-precision radial velocity (RV) observations from NIRPS and HARPS. With an orbital period of 2.85 d, the transiting sub-Neptune GJ 3090 b has a mass we refine to $4.52 \\pm 0.47 M_{\\oplus}$, which, combined with our derived radius of $2.18 \\pm 0.06 R_{\\oplus}$, yields a density of $2.40^{+0.33}_{-0.30}$ g cm$^{-3}$. The combined interior structure and atmospheric constraints indicate that GJ 3090 b is a compelling water-world candidate, with a volatile-rich envelope in which water likely represents a significant fraction. We also confirm the presence of a second planet, GJ 3090 c, a sub-Neptune with a 15.9 d orbit and a minimum mass of $10.0 \\pm 1.3 M_{\\oplus}$, which does not transit. Despite its proximity to the star\u0027s 18 d rotation period, our joint analysis using a multidimensional Gaussian process (GP) model that incorporates TESS photometry and differential stellar temperature measurements distinguishes this planetary signal from activity-induced variability. In addition, we place new constraints on a non-transiting planet candidate with a period of 12.7 d, suggested in earlier RV analyses. This candidate remains a compelling target for future monitoring. These results highlight the crucial role of multidimensional GP modelling in disentangling planetary signals from stellar activity, enabling the detection of a planet near the stellar rotation period that could have remained undetected with traditional approaches.",
    "arxiv_id": "2601.09330",
    "authors": [
      "Pierrot Lamontagne",
      "Drew Weisserman",
      "Charles Cadieux",
      "David Lafreni\u00e8re",
      "Alexandrine L\u0027Heureux",
      "Mykhaylo Plotnykov",
      "L\u00e9na Parc",
      "Atanas K. Stefanov",
      "Leslie Moranta",
      "Ren\u00e9 Doyon",
      "Fran\u00e7ois Bouchy",
      "Jean-Baptiste Delisle",
      "Louise D. Nielsen",
      "Gaspare Lo Curto",
      "Fr\u00e9d\u00e9rique Baron",
      "Susana C. C. Barros",
      "Bj\u00f6rn Benneke",
      "Xavier Bonfils",
      "Marta Bryan",
      "Bruno L. Canto Martins",
      "Ryan Cloutier",
      "Nicolas B. Cowan",
      "Daniel Brito de Freitas",
      "Jose Renan De Medeiros",
      "Xavier Delfosse",
      "Elisa Delgado-Mena",
      "Xavier Dumusque",
      "David Ehrenreich",
      "Pedro Figueira",
      "Jonay I. Gonz\u00e1lez Hern\u00e1ndez",
      "Izan de Castro Le\u00e3o",
      "Christophe Lovis",
      "Lison Malo",
      "Claudio Melo",
      "Lucile Mignon",
      "Christoph Mordasini",
      "Francesco Pepe",
      "Rafael Rebolo",
      "Jason Rowe",
      "Nuno C. Santos",
      "Damien S\u00e9gransan",
      "Alejandro Su\u00e1rez Mascare\u00f1o",
      "St\u00e9phane Udry",
      "Diana Valencia",
      "Gregg Wade",
      "Manuel Abreu",
      "Jos\u00e9 Luan A. Aguiar",
      "Khaled Al Moulla",
      "Guillaume Allain",
      "Romain Allart",
      "Jose Manuel Almenara",
      "Tomy Arial",
      "Hugues Auger",
      "Luc Bazinet",
      "Nicolas Blind",
      "David Bohlender",
      "\u00c9tienne Artigau",
      "Isabelle Boisse",
      "Anne Boucher",
      "Vincent Bourrier",
      "S\u00e9bastien Bovay",
      "Pedro Branco",
      "Christopher Broeg",
      "Denis Brousseau",
      "Alexandre Cabral",
      "Andres Carmona",
      "Yann Carteret",
      "Zalpha Challita",
      "David Charbonneau",
      "Bruno Chazelas",
      "Catherine A. Clark",
      "Jo\u00e3o Coelho",
      "Marion Cointepas",
      "Karen A. Collins",
      "Kevin I. Collins",
      "Uriel Conod",
      "Eduardo Cristo",
      "Ana Rita Costa Silva",
      "Antoine Darveau-Bernier",
      "Laurie Dauplaise",
      "Roseane de Lima Gomes",
      "Jo\u00e3o Faria",
      "Dasaev O. Fontinele",
      "Thierry Forveille",
      "Yolanda G. C. Frensch",
      "Jonathan Gagn\u00e9",
      "Fr\u00e9d\u00e9ric Genest",
      "Ludovic Genolet",
      "Jo\u00e3o Gomes da Silva",
      "F\u00e9lix Gracia T\u00e9mich",
      "Nicole Gromek",
      "Nolan Grieves",
      "Olivier Hernandez",
      "Melissa J. Hobson",
      "H. Jens Hoeijmakers",
      "Norbert Hubin",
      "Neil J. Cook",
      "Marziye Jafariyazani",
      "Farbod Jahandar",
      "Ray Jayawardhana",
      "Hans-Ulrich K\u00e4ufl",
      "Dan Kerley",
      "Johann Kolb",
      "Vigneshwaran Krishnamurthy",
      "Benjamin Kung",
      "Pierre Larue",
      "Henry Leath",
      "Olivia Lim",
      "Allan M. Martins",
      "Elisabeth C. Matthews",
      "Jaymie Matthews",
      "Jean-S\u00e9bastien Mayer",
      "Stan Metchev",
      "Lina Messamah",
      "Yuri S. Messias",
      "Dany Mounzer",
      "Nicola Nari",
      "Ares Osborn",
      "Mathieu Ouellet",
      "Jon Otegi",
      "Luca Pasquini",
      "Vera M. Passegger",
      "Stefan Pelletier",
      "C\u00e9line Peroux",
      "Caroline Piaulet-Ghorayeb",
      "Emanuela Pompei",
      "Anne-Sophie Poulin-Girard",
      "Jos\u00e9 Luis Rasilla",
      "Vladimir Reshetov",
      "Jonathan Saint-Antoine",
      "Mirsad Sarajlic",
      "Ivo Saviane",
      "Robin Schnell",
      "Alex Segovia",
      "Julia Seidel",
      "Armin Silber",
      "Peter Sinclair",
      "Michael Sordet",
      "Danuta Sosnowska",
      "Avidaan Srivastava",
      "M\u00e1rcio A. Teixeira",
      "Simon Thibault",
      "Philippe Vall\u00e9e",
      "Thomas Vandal",
      "Valentina Vaulato",
      "Joost P. Wardenier",
      "Bachar Wehbe",
      "Ivan Wevers",
      "Fran\u00e7ois Wildi",
      "Vincent Yariv",
      "G\u00e9rard Zins"
    ],
    "categories": [
      "astro-ph.EP"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "title": "NIRPS tightens the mass estimate of GJ 3090 b and detects a planet near the stellar rotation period",
    "url": "https://arxiv.org/abs/2601.09330",
    "version": "v1"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "a6739545-d218-4049-bf4f-e5d737f254a9",
    "id": "arXiv Dataset",
    "type": "Model",
    "variant": "snapshot-2026-01-17",
    "version": "0.1.0"
  },
  "user_id": 1000002
}