SIMBAD references

2001ApJ...556..373G - Astrophys. J., 556, 373-379 (2001/July-3)

Infrared observations and modeling of one of the coolest T dwarfs: Gliese 570D.

GEBALLE T.R., SAUMON D., LEGGETT S.K., KNAPP G.R., MARLEY M.S. and LODDERS K.

Abstract (from CDS):

We have obtained a good-quality R∼400, 0.8-2.5 µm spectrum as well as accurate photometry of Gliese 570D, one of the coolest and least-luminous brown dwarfs currently known. The spectrum shows that Gl 570D has deeper absorptions in the strong water and methane bands at 1.12-1.17, 1.33-1.45, 1.62-1.88, and 2.20-2.45 µm and is both bluer at J-K and redder at K-L' than previously observed T dwarfs. Data analysis using model spectra coupled with knowledge of the well-understood primary implies that for the same surface gravity, Gl 570D is about 160 K cooler than Gl 229B. For an age range of 2-5 Gyr, Gl 570D has an effective temperature in the range 784-824 K, a surface gravity logg in the range 5.00-5.27 (cm.s–2), and a luminosity in the range 2.88-2.98x10–6 L.

Abstract Copyright:

Journal keyword(s): Stars: Abundances - Stars: Atmospheres - stars: individual (Gliese 570D) - Stars: Low-Mass, Brown Dwarfs

CDS comments: SDSS 1624 = SDSS J162414.37+002915.6, SDSS 1346 = SDSS J134646.45-003150.4

Simbad objects: 8

goto Full paper

goto View the reference in ADS

To bookmark this query, right click on this link: simbad:2001ApJ...556..373G and select 'bookmark this link' or equivalent in the popup menu


2020.10.26-06:10:07

© Université de Strasbourg/CNRS

    • Contact