Published November 14, 2025 | Version v1
Dataset Open

Multimodal atmospheric characterization of β Pictoris b: Adding high-resolution continuum spectra from GRAVITY

Authors/Creators

  • 1. Laboratoire J.-L. Lagrange, Université Côte d'Azur, Observatoire de la Côte d'Azur, CNRS, 06304 Nice, France
  • 2. IPAG, Université Grenoble-Alpes, CNRS, F-38000 Grenoble, France
  • 3. Max-Planck-Institut für Astronomie, Königstuhl 17, D-69117 Hei- delberg, Germany

Contributors

  • 1. IPAG, Université Grenoble-Alpes, CNRS, F-38000 Grenoble, France
  • 2. Max-Planck-Institut für Astronomie, Königstuhl 17, D-69117 Heidelberg, Germany
  • 3. Laboratoire J.-L. Lagrange, Université Côte d'Azur, Observatoire de la Côte d'Azur, CNRS, 06304 Nice, France
  • 4. LESIA, Observatoire de Paris, Université PSL, CNRS, 92195 Meudon, France
  • 5. European Southern Observatory, Karl-Schwarzschild-Straße 2, 85748 Garching, Germany
  • 6. Max Planck Institute for Extraterrestrial Physics, Giessenbachstraße 1, 85748 Garching, Germany
  • 7. Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge CB3 0HA, UK
  • 8. Maison de la Simulation, CEA, CNRS, Univ. Paris-Sud, UVSQ, Université Paris-Saclay, 91191 Gif-sur-Yvette, France
  • 9. Aperio Software Ltd., Insight House, Riverside Business Park, Stoney Common Road, Stansted, Essex, CM24 8PL, UK
  • 10. Förderkreis Planetarium Göttingen, Göttingen, Germany
  • 11. Department of Astronomy, University of Texas at Austin, Austin, TX 78712, USA
  • 12. Department of Astronomy and Astrophysics, University of California, Santa Cruz, CA 95064, USA
  • 13. Aix Marseille Univ, CNRS, CNES, LAM, Marseille, France
  • 14. Instituto de Física y Astronomía, Facultad de Ciencias, Universidad de Valparaíso, 1111 Valparaíso, Chile
  • 15. Leiden Observatory, Leiden University, P.O. Box 9513, 2300 RA Leiden, The Netherlands
  • 16. Astrophysics, University of Oxford, Denys Wilkinson Building, Keble Road, Oxford, OX1 3RH, UK
  • 17. Department of Physics and Astronomy, Johns Hopkins University, 3400 N. Charles Street, Baltimore, MD 21218, USA
  • 18. Max-Planck-Institut für Astronomie, Königstuhl 17, D-69117 Hei- delberg, Germany
  • 19. Fakultät für Physik, Universität Duisburg-Essen, Lotharstraße 1, 47057 Duisburg, Germany
  • 20. Physikalisches Institut, Universität Bern, Gesellschaftsstr. 6, CH- 3012 Bern, Switzerland
  • 21. Academia Sinica, Institute of Astronomy and Astrophysics, 11F Astronomy-Mathematics Building, NTU/AS campus, No. 1, Section 4, Roosevelt Rd., Taipei 10617, Taiwan
  • 22. The Kavli Institute for Astronomy and Astrophysics, Peking Uni- versity, Beijing 100871, China

Description

We present the first VLTI/GRAVITY observations at R~4000 of Beta Pic b. These four high S/N (~20) K-band spectra conserve both the pseudo-continuum and molecular absorption patterns. We analyze them with four self-consistent forward model grids (Exo-REM, ATMO, BT-Settl, Sonora) exploring Teff, log(g), metallicity, C/O, and, 12CO/13CO ratio. We also upgrade our forward modeling code ForMoSA to account for the data multi-modality and combine the GRAVITY epochs with published 1-5 µm photometry, low- to medium-resolution spectra (0.9-7 µm), and high-resolution echelle spectra (2.1-5.2 µm). 

This repository includes all the observations and a useful set of outputs from the inversion analyses, including best-fit models. A README file is included to document the file structure, units, and relevant references. You may also find an additional exemple.ipynb notebook to help you extract the data.

Files

OBS_MOD_BetaPicb.zip

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Additional details

Additional titles

Subtitle
Observations & Models

Identifiers

arXiv
arXiv:2509.25338

Dates

Accepted
2025-09-25
A&A, Sect. 10. Planets, planetary systems, and small bodies

Software

Programming language
Python