Abundances of light metals and NI in a sample of disc stars

Bibcode
1988A&A...206..100A
Abia, C.; Rebolo, R.; Beckman, J. E.; Crivellari, L.
Bibliographical reference

Astronomy and Astrophysics (ISSN 0004-6361), vol. 206, no. 1, Nov. 1988, p. 100-107. Research supported by the Consejo Superior de Investigaciones Cientificas and CNR.

Advertised on:
11
1988
Number of authors
4
IAC number of authors
3
Citations
47
Refereed citations
47
Description
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 results for Ca and Si (α-elements) are in excellent agreement with previous observational studies. The Al overabundances reported here show somewhat larger values close to [Fe/H] = -1.0 than those previously found in the literature. The abundance of Ni seems to follow that of Fe over the whole metallicity range studied.
Type
Refereed
Stellar composition
Stellar atmospheres

It may interest you

  • Refereed
    Characterisation at Cryogenic Temperatures of an Attenuator for an Application of Astrophysical Instrumentation with MKIDs
    The use of non-cryogenic certified commercial electronics for cryogenic applications may be attractive due to their cost and availability, but it also carries risks related to reliability, performance and thermal compatibility. The decision to use commercial components that are not certified for cryogenics instead of components specifically
    Rodríguez Ramos L.F. et al.

    Advertised on:

    12
    2024
  • Refereed
    The return of FarNet-II: Generation of solar far-side magnetograms from helioseismic data
    Context. The far-side activity of the Sun can be inferred by interpreting the near-side wave field using local helioseismic techniques. However, detections are limited to strongly active regions because signal-to-noise ratio of the data is low. Recently, we developed the FarNet and FarNet-II neural networks to improve the identification of active
    Broock, E. G. et al.

    Advertised on:

    12
    2024
    Bibcode
    2024A&A...692A.182B
    Citations
    0
  • Refereed
    Non-local thermodynamic equilibrium inversions of the Si I 10827 Å spectral line
    Inferring the coupling of different atmospheric layers requires observing spectral lines sensitive to the atmospheric parameters, particularly the magnetic field vector, at various heights. The best way to tackle this goal is to perform multi-line observations simultaneously. For instance, the new version of the Gregor Infrared Spectrograph
    Quintero Noda, C. et al.

    Advertised on:

    12
    2024
    Bibcode
    2024A&A...692A.169Q
    Citations
    0