ISO observations of candidate young brown dwarfs

F. Comerón, George H. Rieke, P. Claes, J. Torra, R. J. Laureijs

Research output: Contribution to journalArticle

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Abstract

ISOCAM measurements or upper limits for low mass members of the ρ Ophiuchi embedded cluster extend the sampling of the spectral energy distributions already obtained from the ground towards longer wavelengths, where emission by circumstellar material is significant. Good fits to the combined (ground-based + ISOCAM) photometry are obtained with theoretical models of pre-main sequence evolution, complemented with models of the spectrum of circumstellar emission, synthetic spectra of cold atmospheres, and an extinction law. The most important physical parameters of the targets, such as mass and luminosity, can be estimated with more confidence than with ground-based data alone, thanks to the much more robust reconstruction of the intrinsic spectral energy distribution made possible by the new ISOCAM data. An object-by-object discussion, based on both published and new material, shows that estimates of the source temperatures from fitting of the photometry agree closely with spectroscopy for all seven sources where both techniques have been applied. The agreement between the new fits and those based on groundbased photometry alone is also reasonably good. Three of the sources are very likely to be young brown dwarfs, five are transitional, and three appear to be low mass stars.

Original languageEnglish (US)
Pages (from-to)522-532
Number of pages11
JournalAstronomy and Astrophysics
Volume335
Issue number2
StatePublished - Jul 10 1998

Fingerprint

photometry
spectral energy distribution
energy
confidence
extinction
sampling
spectroscopy
luminosity
wavelength
atmospheres
stars
atmosphere
estimates
wavelengths
young
temperature
distribution
parameter
new material
cold

Keywords

  • Infrared: stars
  • Stars: formation
  • Stars: low mass, brown dwarfs

ASJC Scopus subject areas

  • Space and Planetary Science

Cite this

Comerón, F., Rieke, G. H., Claes, P., Torra, J., & Laureijs, R. J. (1998). ISO observations of candidate young brown dwarfs. Astronomy and Astrophysics, 335(2), 522-532.

ISO observations of candidate young brown dwarfs. / Comerón, F.; Rieke, George H.; Claes, P.; Torra, J.; Laureijs, R. J.

In: Astronomy and Astrophysics, Vol. 335, No. 2, 10.07.1998, p. 522-532.

Research output: Contribution to journalArticle

Comerón, F, Rieke, GH, Claes, P, Torra, J & Laureijs, RJ 1998, 'ISO observations of candidate young brown dwarfs', Astronomy and Astrophysics, vol. 335, no. 2, pp. 522-532.
Comerón F, Rieke GH, Claes P, Torra J, Laureijs RJ. ISO observations of candidate young brown dwarfs. Astronomy and Astrophysics. 1998 Jul 10;335(2):522-532.
Comerón, F. ; Rieke, George H. ; Claes, P. ; Torra, J. ; Laureijs, R. J. / ISO observations of candidate young brown dwarfs. In: Astronomy and Astrophysics. 1998 ; Vol. 335, No. 2. pp. 522-532.
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