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- Ames Research CenterUS864 papers
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8 papers · 2 filters
On the Excitation and Formation of Circumstellar Fullerenes
J. Bernard-Salas, J. Cami, E. Peeters +3
We compare and analyze the Spitzer mid-infrared spectrum of three fullerene-rich planetary nebulae in the Milky Way and the Magellanic Clouds; Tc1, SMP SMC16, and SMP LMC56. The th…
The formation of cosmic fullerenes from arophatic clusters
Elisabetta R. Micelotta, Anthony P. Jones, Jan Cami +3
Fullerenes have recently been identified in space and they may play a significant role in the gas and dust budget of various astrophysical objects including planetary nebulae (PNe)…
YSOVAR: Six pre-main-sequence eclipsing binaries in the Orion Nebula Cluster
M. Morales-Calderón, J. R. Stauffer, K. G. Stassun +17
Eclipsing binaries (EBs) provide critical laboratories for empirically testing predictions of theoretical models of stellar structure and evolution. Pre-main-sequence (PMS) EBs are…
A Significant Population of Candidate New Members of the Rho Ophiuchi Cluster
Mary Barsony, Karl E. Haisch, Kenneth A. Marsh +1
We present a general method for identifying the pre-main-sequence population of any star-forming region, unbiased with respect to the presence or absence of disks, in contrast to s…
The Chemistry of Interstellar OH+, H2O+, and H3O+: Inferring the Cosmic Ray Ionization Rates from Observations of Molecular Ions
David Hollenbach, M. J. Kaufman, D. Neufeld +2
We model the production of OH+, H2O+, and H3O+ in interstellar clouds, using a steady state photodissociation region code that treats the freeze-out of gas species, grain surface c…
Herschel Search for O2 Toward the Orion Bar
Gary J. Melnick, Volker Tolls, Paul F. Goldsmith +15
We report the results of a search for molecular oxygen (O2) toward the Orion Bar, a prominent photodissociation region at the southern edge of the HII region created by the luminou…