High-resolution 1.6 μm Spectra of FeH in M and L Dwarfs

Details High-resolution 1.6 μm Spectra of FeH in M and L Dwarfs High-resolution 1.6 μm Spectra of FeH in M and L Dwarfs

Oct 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aj....140..919h&link_type=abstract

The Astronomical Journal, Volume 140, Issue 4, article id. 919-924 (2010).

Astronomy and Astrophysics

Astronomy

6

Brown Dwarfs, Infrared: Stars, Stars: Individual: Denis 1048-39 Gj 191 Gj 406 Gj 644C Lhs 292 Lhs 2065 Lhs 3003 Lp 944-20 2Mass J1507-16, Stars: Low-Mass

Scientific paper

Near-infrared bands due to the iron monohydride (FeH) molecule are a characteristic feature of late-M and -L dwarfs. We have created a line list at 2200 K for the FeH E 4Π-A 4Π electronic transition near 1.58 μm (6300 cm-1) based on laboratory spectra and an ab initio calculation of the band strength. A variety of M and L dwarfs were observed near 1.6 μm with high spectral resolution (R ~ 70,000) using the Phoenix spectrograph on the 8.1 m Gemini South telescope. The FeH E-A transition made a surprisingly strong contribution to the observed spectral energy distributions and needs to be included in modeling of late-M and L dwarfs.

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