49 new T dwarfs identified using methane imaging - Systèmes de Référence Temps Espace Accéder directement au contenu
Article Dans Une Revue Monthly Notices of the Royal Astronomical Society Année : 2015

49 new T dwarfs identified using methane imaging

C. Cardoso
  • Fonction : Auteur
B. Burningham
  • Fonction : Auteur
L. van Spaandonk
  • Fonction : Auteur
D. Baker
L. Smith
  • Fonction : Auteur
Z. Zhang
  • Fonction : Auteur
  • PersonId : 830596
B. Bucciarelli
  • Fonction : Auteur
S. Dhital
  • Fonction : Auteur
A. Magazzú
  • Fonction : Auteur
D. Pinfield
  • Fonction : Auteur
C. Tinney

Résumé

We present the discovery of 49 new photometrically classified T dwarfs from the combination of large infrared and optical surveys combined with follow-up Telescopio Nazionale Galileo photometry. We used multiband infrared and optical photometry from the United Kingdom Infrared Telescope and Sloan Digital Sky Surveys to identify possible brown dwarf candidates, which were then confirmed using methane filter photometry. We have defined a new photometric conversion between CH4s - CH4l colour and spectral type for T4-T8 brown dwarfs based on a part of the sample that has been followed up using methane photometry and spectroscopy. Using methane differential photometry as a proxy for spectral type for T dwarfs has proved to be a very efficient technique. Of a subset of 45 methane selected brown dwarfs that were observed spectroscopically, 100 per cent were confirmed as T dwarfs. Future deep imaging surveys will produce large samples of faint brown dwarf candidates, for which spectroscopy will not be feasible. When broad wavelength coverage is unavailable, methane imaging offers a means to efficiently classify candidates from such surveys using just a pair of near-infrared images.
Fichier principal
Vignette du fichier
stv380.pdf (832.84 Ko) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte

Dates et versions

hal-02448453 , version 1 (10-02-2023)

Identifiants

Citer

C. Cardoso, B. Burningham, R. Smart, L. van Spaandonk, D. Baker, et al.. 49 new T dwarfs identified using methane imaging. Monthly Notices of the Royal Astronomical Society, 2015, 450 (3), pp.2486-2499. ⟨10.1093/mnras/stv380⟩. ⟨hal-02448453⟩
21 Consultations
2 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More