A YOUNG PLANETARY-MASS OBJECT IN THE ρ OPH CLOUD CORE

@article{Marsh2010AYP,
  title={A YOUNG PLANETARY-MASS OBJECT IN THE $\rho$ OPH CLOUD CORE},
  author={K A Marsh and J. Davy Kirkpatrick and Peter P. Plavchan},
  journal={The Astrophysical Journal Letters},
  year={2010},
  volume={709},
  pages={L158 - L162}
}
We report the discovery of a young planetary-mass brown dwarf in the ρ Oph cloud core. The object was identified as such with the aid of a 1.5–2.4 μm low-resolution spectrum obtained using the NIRC instrument on the Keck I telescope. Based on the COND model, the observed spectrum is consistent with a reddened (AV ∼ 15–16) brown dwarf whose effective temperature is in the range 1200–1800 K. For an assumed age of 1 Myr, comparison with isochrones further constrains the temperature to ∼1400 K and… 

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