High resolution, high S/N spectra obtained using RETICON and CCD detectors are used to determine the abundances of Al, Si, Ca, Ni and Fe in 23 disc stars in the metallicity range -1.2 ⪉ [Fe/H] ⪉ +0.3. The authors have found overabundances, with respect to iron for Al (≡0.4), Si (≡0.3), and Ca (≡0.2) in stars between -1.2 ⪉ [Fe/H] ⪉ -0.5. The
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Abundances of light metals and NI in a sample of disc starsAbia, C. et al.111988
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Abundances, Stellar Parameters, and Spectra from the SDSS-III/APOGEE Survey
The SDSS-III/Apache Point Observatory Galactic Evolution Experiment (APOGEE) survey operated from 2011–2014 using the APOGEE spectrograph, which collects high-resolution (R ∼ 22,500), near-IR (1.51–1.70 μm) spectra with a multiplexing (300 fiber-fed objects) capability. We describe the survey data products that are publicly available, which include
Holtzman, J. A. et al.Advertised on:
112015 -
Accurate masses of very low mass stars. I. GL 570BC (0.6 M_sun+0.4 M_sun)
We present very accurate individual masses (1.2% relative accuracy) for the two components of Gl 570BC, an interferometric and double-lined spectroscopic binary system. They were obtained from new high accuracy radial velocity and angular separation measurements, analysed together with previously published measurements. From those data we determine
Forveille, Thierry et al.Advertised on:
111999 -
Acenes adducts with C70 fullerene: Anthracene, tetracene and pentacene
Not Available
Garcia-Hernandez, D. A. et al.Advertised on:
112016 -
Active galactic nuclei and nuclear starbursts.
The Starburst model for radio-quiet Active Galactic Nuclei (AGN) postulates that the activity seen in most AGN is powered solely by young stars and compact supernova remnants (cSNR) in a burst of star formation at the time when the metal rich core of the spheroid of a normal early type galaxy was formed. In this model, the broad permitted lines
Boyle, B. J. et al.Advertised on:
111993 -
Active region fine structure observed at 0.08 arcsec resolution
Context. The various mechanisms of magneto-convective energy transport determine the structure of sunspots and active regions. Aims: We characterise the appearance of light bridges and other fine-structure details and elaborate on their magneto-convective nature. Methods: We present speckle-reconstructed images taken with the broad-band imager (BBI
Schlichenmaier, R. et al.Advertised on:
112016