CHEMICAL ABUNDANCES IN FIELD RED GIANTS FROM HIGH-RESOLUTION H-BAND SPECTRA USING THE APOGEE SPECTRAL LINELIST

Journal Article · Fri Mar 01 00:00:00 EST 2013 · Astrophysical Journal

DOI:https://doi.org/10.1088/0004-637X/765/1/16· OSTI ID:22167633

Smith, Verne V.; Cunha, Katia ^[1]; Shetrone, Matthew D. ^[2]; Meszaros, Szabolcs; Allende Prieto, Carlos ^[3]; Bizyaev, Dmitry ^[4]; Garcia Perez, Ana; Majewski, Steven R. ^[5]; Schiavon, Ricardo ^[6]; Holtzman, Jon ^[7]

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1. National Optical Astronomy Observatories, Tucson, AZ 85719 (United States)
2. Department of Astronomy and McDonald Observatory, University of Texas, Austin, TX 78712 (United States)
3. Instituto d'Astrofisica de Canarias, E-38205, La Laguna, Tenerife (Spain)
4. Apache Point Observatory, Sunspot, NM 88349 (United States)
5. Department of Astronomy, University of Virginia, Charlottesville, VA 22904 (United States)
6. Astrophysics Research Institute, Liverpool John Moores University, Liverpool L3 5UX (United Kingdom)
7. Department of Astronomy, New Mexico State University, Las Cruces, NM 88003 (United States)

High-resolution H-band spectra of five bright field K, M, and MS giants, obtained from the archives of the Kitt Peak National Observatory Fourier transform spectrometer, are analyzed to determine chemical abundances of 16 elements. The abundances were derived via spectrum synthesis using the detailed linelist prepared for the Sloan Digital Sky Survey III Apache Point Galactic Evolution Experiment (APOGEE), which is a high-resolution near-infrared spectroscopic survey to derive detailed chemical abundance distributions and precise radial velocities for 100,000 red giants sampling all Galactic stellar populations. The red giant sample studied here was chosen to probe which chemical elements can be derived reliably from the H-band APOGEE spectral region. These red giants consist of two K-giants ({alpha} Boo and {mu} Leo), two M-giants ({beta} And and {delta} Oph), and one thermally pulsing asymptotic giant branch (TP-AGB) star of spectral type MS (HD 199799). Measured chemical abundances include the cosmochemically important isotopes {sup 12}C, {sup 13}C, {sup 14}N, and {sup 16}O, along with Mg, Al, Si, K, Ca, Ti, V, Cr, Mn, Fe, Co, Ni, and Cu. The K and M giants exhibit the abundance signature of the first dredge-up of CN-cycle material, while the TP-AGB star shows clear evidence of the addition of {sup 12}C synthesized during {sup 4}He-burning thermal pulses and subsequent third dredge-up. A comparison of the abundances derived here with published values for these stars reveals consistent results to {approx}0.1 dex. The APOGEE spectral region and linelist is thus well suited for probing both Galactic chemical evolution, as well as internal nucleosynthesis and mixing in populations of red giants via high-resolution spectroscopy.

• OSTI ID: 22167633
• Journal Information: Astrophysical Journal, Vol. 765, Issue 1; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
ABSORPTION SPECTRA
ABSORPTION SPECTROSCOPY
CARBON 12
CARBON 13
COMPARATIVE EVALUATIONS
ELEMENT ABUNDANCE
EMISSION SPECTROSCOPY
FOURIER TRANSFORM SPECTROMETERS
GALACTIC EVOLUTION
GIANT STARS
HELIUM 4
IRON
MAGNESIUM
NITROGEN 14
NUCLEOSYNTHESIS
OXYGEN 16
RADIAL VELOCITY
SILICON