• DOI:10.3847/2041-8205/821/1/L15
• Corpus ID: 119289711

The Nearest Isolated Member of the TW Hydrae Association is a Giant Planet Analog

@article{Kellogg2016TheNI,
  title={The Nearest Isolated Member of the TW Hydrae Association is a Giant Planet Analog},
  author={Kendra Kellogg and Stanimir Metchev and Jonathan Gagn{\'e} and Jacqueline K. Faherty},
  journal={arXiv: Solar and Stellar Astrophysics},
  year={2016}
}

• K. Kellogg, S. Metchev, +1 author J. Faherty
• Published 28 March 2016
• Physics, Geology
• arXiv: Solar and Stellar Astrophysics

In a recent search for unusually red L and T dwarfs, we identified 2MASS J11193254-1137466 as a likely young L7 dwarf and potential member of the TW Hydrae association. We present spectra that confirm the youth of this object. We also measure a radial velocity of 8.5 +/- 3.3 km/s that, together with the sky position, proper motion and photometric distance, results in a 92% probability of membership in the TW Hydrae association, with a calibrated field contamination probability of 0.0005% using the BANYAN II tool. Using the age of TW Hydrae and the luminosity of 2MASS J11193254-1137466, we estimate its mass to be 4.3--7.6 MJup. It is the lowest-mass and nearest isolated member of TW Hydrae at a kinematic distance of 28.9 +/- 3.6 pc, and the second-brightest isolated <10 MJup object discovered to date.