منابع مشابه
Near-Infrared Spectral Classification of late-M and L Dwarfs
We present near-infrared (1 to 2.5 μm) low-resolution spectroscopy of eleven ultracool dwarfs with spectral types ranging from M7 to L8. Combining our observations with data published previously by Leggett et al. (2001), we have measured equivalent widths for the strongest atomic features and constructed narrowband indices to gauge the strength of the strongest molecular features. Those measure...
متن کاملThe First Detailed Abundances for M giants in the inner Bulge from Infrared Spectroscopy
We report the first abundance analysis of 17 M giant stars in the inner Galactic bulge at (l, b) = (0,−1), based on R = 25, 000 infrared spectroscopy (1.5 − 1.8 μm) using NIRSPEC at the Keck telescope. Based on their luminosities and radial velocities, we identify these stars with a stellar population older than 1 Gyr. We find the iron abundance 〈[Fe/H]〉 = −0.22± 0.03, with a 1σ dispersion of 0...
متن کاملThe First Detailed Abundances for M giants in Baade’s Window from Infrared Spectroscopy
We report the first abundance analysis of 14 M giant stars in the Galactic bulge, based on R = 25, 000 infrared spectroscopy (1.5−1.8 μm) using NIRSPEC at the Keck telescope. Because some of the bulge M giants reach high luminosities and have very late spectral type, it has been suggested that they are the progeny of only the most metal rich bulge stars, or possibly members of a younger bulge p...
متن کاملM giants in MACHO , DENIS and ISOGAL
A ‘complete’ sample of 174 M giants classified by Blanco (1986) and later than subtype M0 in the NGC 6522 Baade’s Window clear field has been investigated to establish some general properties of cool Bulge stars. Photometric information has been obtained from the MACHO database to search for variablility and, where possible, to determine periods. Nearand mid-IR magnitudes have been extracted fr...
متن کاملMid-Infrared and near-infrared spectral properties of mycorrhizal and non-mycorrhizal root cultures.
We investigated the Fourier-transformed mid-infrared (MIR) and near-infrared (NIR) spectroscopic properties of mycorrhizal (M) and non-mycorrhizal (NM) carrot roots with the goal of finding infrared markers for colonization by arbuscular mycorrhizal (AM) fungi. The roots were cultured with or without the AM fungus Glomus intraradices under laboratory conditions. A total of 50 M and NM samples w...
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ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2015
ISSN: 1538-4357
DOI: 10.1088/0004-637x/811/1/45