SIMBAD references

2007ApJ...662.1245M - Astrophys. J., 662, 1245-1253 (2007/June-3)

Moderate-resolution Spitzer infrared spectrograph observations of M, L, and T dwarfs.

MAINZER A.K., ROELLIG T.L., SAUMON D., MARLEY M.S., CUSHING M.C., SLOAN G.C., KIRKPATRICK J.D., LEGGETT S.K. and WILSON J.C.

Abstract (from CDS):

We present 10-19 µm moderate-resolution spectra of 10 M dwarfs, one L dwarf, and two T dwarf systems obtained with the Infrared Spectrograph (IRS) on board the Spitzer Space Telescope. The IRS allows us to examine molecular spectroscopic features/lines at moderate spectral resolution in a heretofore untapped wavelength regime. These R=λ/Δλ∼600 spectra allow for a more detailed examination of clouds and nonequilibrium chemistry, as well as the molecular features of H2O, NH3, and other trace molecular species that are the hallmarks of these objects. A cloud-free model best fits our mid-infrared spectrum of the T1 dwarf ε Indi Ba, and we find that the NH3 feature in ε Indi Bb is best explained by a nonequilibrium abundance due to vertical transport in its atmosphere. We examined a set of objects (mostly M dwarfs) in multiple systems to look for evidence of emission features, which might indicate an atmospheric temperature inversion, as well as trace molecular species; however, we found no evidence of either.

Abstract Copyright:

Journal keyword(s): Infrared: Stars - Stars: Late-Type - Stars: Low-Mass, Brown Dwarfs

CDS comments: Table 1 : DENIS J0559-1404 not identified

Simbad objects: 19

goto Full paper

goto View the reference in ADS

To bookmark this query, right click on this link: simbad:2007ApJ...662.1245M and select 'bookmark this link' or equivalent in the popup menu


2020.02.22-12:12:25

© Université de Strasbourg/CNRS

    • Contact