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- Ames Research CenterUS864 papers
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12 papers · 2 filters
High-resolution IR absorption spectroscopy of polycyclic aromatic hydrocarbons: the realm of anharmonicity
Elena Maltseva, Annemieke Petrignani, Alessandra Candian +6
We report on an experimental and theoretical investigation of the importance of anharmonicity in the 3 micron CH stretching region of Polycyclic Aromatic Hydrocarbon (PAH) molecule…
Measuring the vertical age structure of the Galactic disc using asteroseismology and SAGA
L. Casagrande, V. Silva Aguirre, K. J. Schlesinger +10
The existence of a vertical age gradient in the Milky Way disc has been indirectly known for long. Here, we measure it directly for the first time with seismic ages, using red gian…
Mid-infrared spectroscopy of the Andromeda galaxy
D. Hemachandra, P. Barmby, E. Peeters +6
We present Spitzer/Infrared Spectrograph (IRS) 5-21 micron spectroscopic maps towards 12 regions in the Andromeda galaxy (M31). These regions include the nucleus, bulge, an active…
Stars, Gas, and Dark Matter in the Solar Neighborhood
Christopher F. McKee, Antonio Parravano, David J. Hollenbach
The surface density and vertical distribution of stars, stellar remnants, and gas in the solar vicinity form important ingredients for understanding the star formation history of t…
Excitation Mechanisms for HCN (1-0) and HCO+ (1-0) in Galaxies from the Great Observatories All-sky LIRG Survey
G. C. Privon, R. Herrero-Illana, A. S. Evans +18
We present new IRAM 30m spectroscopic observations of the GHz band, including emission from the CCH (n=1-0) multiplet, HCN (1-0), HCO+ (1-0), and HNC (1-0), for a sample o…
Detection of Extremely Broad Water Emission from the molecular cloud interacting Supernova Remnant G349.7+0.2
J. Rho, J. W. Hewitt, A. Boogert +2
We performed Herschel HIFI, PACS and SPIRE observations towards the molecular cloud interacting supernova remnant G349.7+0.2. An extremely broad emission line was detected at 557 G…