Detection of Neodymium in APOGEE H-band Spectra and its Application to Chemical Tagging

Bibcode
2015AAS...22531905H
Hasselquist, S.; Shetrone, Matthew D.; Smith, Verne V.; Holtzman, Jon A.; Lawler, James E.; Ivans, Inese I.; Majewski, Steven R.; Schiavon, Ricardo P.; Zasowski, Gail; Nidever, David L.; Hearty, Fred; Allende-Prieto, C.; Beers, Timothy C.; García Pérez, A. E.; Sobeck, Jennifer; Apogee Team
Referencia bibliográfica

American Astronomical Society, AAS Meeting #225, #319.05

Fecha de publicación:
1
2015
Número de autores
16
Número de autores del IAC
2
Número de citas
0
Número de citas referidas
0
Descripción
We report the successful detection of the rare earth element Neodymium (Nd) in the high-resolution, H-band spectra from the SDSS III Apache Point Observatory Galactic Evolution Experiment (APOGEE). Using the Nd II transition at 16058.014 angstroms, we have detected significant Nd enhancements in all stars observed by APOGEE belonging to the Sagittarius (Sgr) Dwarf Spheroidal (dSph) galaxy. Because Sgr is known to be enhanced in heavy s-process elements such as Nd, we can use this feature to identify and chemically tag Sgr stream members that have been observed in the Galactic halo by APOGEE. We also use this feature to characterize rare earth element abundance variations in clusters observed by APOGEE.
Tipo
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