Updated orbital monitoring and dynamical masses for nearby M-dwarf binaries - Archive ouverte HAL Access content directly
Journal Articles Astronomy and Astrophysics - A&A Year : 2022

Updated orbital monitoring and dynamical masses for nearby M-dwarf binaries

, , (1) , , (1) , (2) , , (1) , , (3) , , (3, 4) , (3) , (1) , (5) , (2) , (1) , (6) , (3) , (2) , , , , , , , , ,
1
2
3
4
5
6
Per Calissendorff
Markus Janson
  • Function : Author
Rainer Köhler
  • Function : Author
Samantha Brown-Sevilla
  • Function : Author
Philippe Delorme
  • Function : Author
Stephen Durkan
  • Function : Author
Sergio Messina
  • Function : Author
Michael Meyer
  • Function : Author
Ole Möller-Nilsson
  • Function : Author
Markus Rabus
  • Function : Author
Joshua Schlieder
  • Function : Author
Arthur Vigan
  • Function : Author
Zahed Wahhaj
  • Function : Author
Francois Wildi
  • Function : Author
Alice Zurlo
  • Function : Author

Abstract

Young M-type binaries are particularly useful for precise isochronal dating by taking advantage of their extended pre-main sequence evolution. Orbital monitoring of these low-mass objects becomes essential in constraining their fundamental properties, as dynamical masses can be extracted from their Keplerian motion. Here, we present the combined efforts of the AstraLux Large Multiplicity Survey, together with a filler sub-programme from the SpHere INfrared Exoplanet (SHINE) project and previously unpublished data from the FastCam lucky imaging camera at the Nordical Optical Telescope (NOT) and the NaCo instrument at the Very Large Telescope (VLT). Building on previous work, we use archival and new astrometric data to constrain orbital parameters for 20 M-type binaries. We identify that eight of the binaries have strong Bayesian probabilities and belong to known young moving groups (YMGs). We provide a first attempt at constraining orbital parameters for 14 of the binaries in our sample, with the remaining six having previously fitted orbits for which we provide additional astrometric data and updated Gaia parallaxes. The substantial orbital information built up here for four of the binaries allows for direct comparison between individual dynamical masses and theoretical masses from stellar evolutionary model isochrones, with an additional three binary systems with tentative individual dynamical mass estimates likely to be improved in the near future. We attained an overall agreement between the dynamical masses and the theoretical masses from the isochrones based on the assumed YMG age of the respective binary pair. The two systems with the best orbital constrains for which we obtained individual dynamical masses, J0728 and J2317, display higher dynamical masses than predicted by evolutionary models.
Fichier principal
Vignette du fichier
aa42766-21.pdf (14.19 Mo) Télécharger le fichier
Origin : Publisher files allowed on an open archive

Dates and versions

hal-03808140 , version 1 (29-11-2022)

Licence

Attribution - CC BY 4.0

Identifiers

Cite

Per Calissendorff, Markus Janson, Laetitia Rodet, Rainer Köhler, Mickaël Bonnefoy, et al.. Updated orbital monitoring and dynamical masses for nearby M-dwarf binaries. Astronomy and Astrophysics - A&A, 2022, 666, pp.A16. ⟨10.1051/0004-6361/202142766⟩. ⟨hal-03808140⟩
6 View
0 Download

Altmetric

Share

Gmail Facebook Twitter LinkedIn More