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  • 1905.03139v1

    Rights statement: The final, definitive version of this article has been published in the Journal, Astronomy and Astrophysics, 627, 2019, © EDP Sciences.

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    Available under license: CC BY-NC: Creative Commons Attribution-NonCommercial 4.0 International License

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J-PLUS: Discovery and characterisation of ultracool dwarfs using Virtual Observatory tools

Research output: Contribution to journalJournal article

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  • E. Solano
  • E. L. Martín
  • J. A. Caballero
  • C. Rodrigo
  • R. E. Angulo
  • J. Alcaniz
  • A. J. Cenarro
  • D. Cristóbal-Hornillos
  • R. A. Dupke
  • A. Ederoclite
  • F. Jiménez-Esteban
  • J. A. Hernandez-Jimenez
  • C. Hernández-Monteagudo
  • R. Lopes de Oliveira
  • C. López-Sanjuan
  • A. Marín-Franch
  • C. Mendes de Oliveira
  • M. Moles
  • A. Orsi
  • L. Sodré Jr
  • J. Varela
  • H. Vázquez Ramió
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Article numberA29
<mark>Journal publication date</mark>1/07/2019
<mark>Journal</mark>Astronomy and Astrophysics
Volume627
Number of pages9
Publication statusPublished
Original languageEnglish

Abstract

Ultracool dwarfs (UCDs) are objects with spectral types equal or later than M7. Most of them have been discovered using wide-field imaging surveys. The Virtual Observatory (VO) has proven to be of great utility to efficiently exploit these astronomical resources. We aim to validate a VO methodology designed to discover and characterize UCDs in the J-PLUS photometric survey. J-PLUS is a multiband survey carried out with the wide angle T80Cam optical camera mounted on the 0.83-m telescope JAST/T80 in the Observatorio Astrof\'isico de Javalambre. In this work we make use of the Internal Data Release (IDR) covering 528 deg$^2$. We complement J-PLUS photometry with other catalogues in the optical and IR using VOSA, a VO tool that estimates physical parameters from the spectral energy distribution fitting to collections of theoretical models. Objects identified as UCDs are distinguished from background M giants and highly reddened stars using parallaxes and proper motions from Gaia DR2. We identify 559 UCDs, ranging from i=16.2 to 22.4 mag, of which 187 are candidate UCDs not previously reported in the literature. This represents an increase in the number of known UCDs of about 50% in the studied region of the sky, particularly at the faint end of our sensitivity, which is interesting as reference for future wide and deep surveys such as Euclid. Three candidates constitute interesting targets for exoplanet surveys because of their proximity (

Bibliographic note

The final, definitive version of this article has been published in the Journal, Astronomy and Astrophysics, 627, 2019, © EDP Sciences.