The peculiar nature of BD + 24 deg 676

Bibcode
1993PASP..105..277M
DOI
10.1086/133142
Martin, Eduardo L.
Bibliographical reference

Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 105, no. 685, p. 277-280.

Advertised on:
3
1993
Number of authors
1
IAC number of authors
1
Citations
8
Refereed citations
7
Description
The H-alpha emission star BD + 24 deg 676, formerly classified as a T Tauri star and more recently as a Herbig Ae star, has been observed at moderately high resolution in the red spectral region. The main results are: the metallic lines over the wavelength range 6400-6750 A have equivalent widths comparable to early G stars; the radial velocity is not consistent with that of members of Taurus-Auriga; the lithium abundance is much lower than expected for a T Tauri star; H-alpha has a changing complex profile. The data do not appear to be compatible with the hypothesis that BD + 24 deg 676 is a premain-sequence star. The properties can be qualitatively understood if it is a close binary composed by a cool postmain-sequence subgiant and a hot main-sequence star, although more data are needed to clarify its nature.
Type
Refereed
A stars
Binary stars
T Tauri stars

It may interest you

  • Refereed
    Stellar halo density with LAMOST K and M giants

    Aims: We derive the morphology of the stellar component in the outer halo volume, and search for possible overdensities due to substructures therein. Methods: We made use of some of the data releases of the spectroscopic survey LAMOST DR8-DR9 in tandem with distance determinations for two subsamples, that is, of K-giants and M-giants, respectively

    López-Corredoira, M. et al.

    Advertised on:

    4
    2024
    Bibcode
    2024A&A...684A.135L
    Citations
    1
  • Refereed
    Euclid preparation. XXXVII. Galaxy colour selections with Euclid and ground photometry for cluster weak-lensing analyses

    Aims: We derived galaxy colour selections from Euclid and ground-based photometry, aiming to accurately define background galaxy samples in cluster weak-lensing analyses. These selections have been implemented in the Euclid data analysis pipelines for galaxy clusters. Methods: Given any set of photometric bands, we developed a method for the

    Euclid Collaboration et al.

    Advertised on:

    4
    2024
    Bibcode
    2024A&A...684A.139E
    Citations
    2
  • Refereed
    The discovery space of ELT-ANDES. Stars and stellar populations

    The ArmazoNes high Dispersion Echelle Spectrograph (ANDES) is the optical and near-infrared high-resolution echelle spectrograph envisioned for the Extremely Large Telescope (ELT). We present a selection of science cases, supported by new calculations and simulations, where ANDES could enable major advances in the fields of stars and stellar

    Roederer, Ian U. et al.

    Advertised on:

    4
    2024
    Bibcode
    2024ExA....57...17R
    Citations
    0