SIMBAD references

2011AJ....142..169B - Astron. J., 142, 169 (2011/November-0)

FIRE spectroscopy of the ultra-cool brown dwarf, UGPS J072227.51-054031.2: kinematics, rotation and atmospheric parameters.


Abstract (from CDS):

We present λ/Δλ ∼ 6000 near-infrared spectroscopy of the nearby T9 dwarf, UGPS J072227.51-054031.2, obtained during the commissioning of the Folded-Port Infrared Echellette Spectrograph on the Baade Magellan telescope at Las Campanas Observatory. The spectrum is marked by significant absorption from H2O, CH4, and H2. We also identify NH3absorption features by comparing the spectrum to recently published line lists. The spectrum is fit with BT-Settl models, indicating Teff∼500-600 K and log g ∼4.3-5.0. This corresponds to a mass of ∼10-30 MJup and an age of 1-5 Gyr, however, there are large discrepancies between the model and observed spectrum. The radial and rotational velocities of the brown dwarf are measured as 46.9 ±2.5 and 40±10 km/s, respectively, reflecting a thin disk Galactic orbit and fast rotation similar to other T dwarfs, suggesting a young, possibly planetary-mass brown dwarf.

Abstract Copyright:

Journal keyword(s): brown dwarfs - infrared: stars - stars: fundamental parameters - stars: individual: UGPS J072227.51-054031.2 - stars: kinematics and dynamics - stars: low-mass

Simbad objects: 7

goto Full paper

goto View the references in ADS

To bookmark this query, right click on this link: simbad:2011AJ....142..169B and select 'bookmark this link' or equivalent in the popup menu