Spectroscopy of Globular Clusters in the Fornax Dwarf Galaxy

Bibcode
2003AJ....125.1291S
DOI
10.1086/367599
Strader, Jay; Brodie, Jean P.; Forbes, Duncan A.; Beasley, Michael A.; Huchra, John P.
Referencia bibliográfica

The Astronomical Journal, Volume 125, Issue 3, pp. 1291-1297.

Fecha de publicación:
3
2003
Número de autores
5
Número de autores del IAC
0
Número de citas
58
Número de citas referidas
55
Descripción
We present low-resolution, integrated Keck spectra of the five globular clusters (GCs) of the Fornax dwarf spheroidal galaxy. We find a tentative age spread among the clusters, with the GC H5 younger by 2-3 Gyr than the others. The clusters generally appear to be very metal-poor ([Fe/H]~-1.8), with the cluster H4 slightly more metal-rich at [Fe/H]=-1.5. We speculate that cluster H4 is similar to the Galactic GC Ruprecht 106, which lacks the [α/Fe] enhancement typical among metal-poor GCs in the Milky Way. High-resolution spectroscopy of individual cluster and field stars will be needed to sort out the surprisingly complex history of GC formation and evolution in this galaxy.
Tipo
Con árbitro
Galaxias
Cúmulos de estrellas
Grupo local

Te puede interesar

  • Con árbitro
    Constraining the TeV gamma-ray emission of SN 2024bch, a possible type IIn-L from a red supergiant progenitor: Multiwavelength observations and analysis of the progenitor
    We present very high-energy optical photometry and spectroscopic observations of SN 2024bch in the nearby galaxy NGC 3206 (∼20 Mpc). We used gamma-ray observations performed with the first Large-Sized Telescope (LST-1) of the Cherenkov Telescope Array Observatory (CTAO) and optical observations with the Liverpool Telescope (LT) combined with data
    Abe, K. et al.

    Fecha de publicación:

    10
    2025
    Bibcode
    2025A&A...702A.125A
    Número de citas
    0
  • Con árbitro
    Revisiting symbiotic binaries with interferometry: II. New PIONIER data
    Symbiotic stars, which generally comprise a red giant and an accreting white dwarf, are excellent laboratories to understand mass transfer in long-period binaries. One of the fundamental questions is how mass is transferred from the red giant to the white dwarf. We used interferometric measurements made with the VLTI/PIONIER instrument, combined
    Boffin, Henri M. J. et al.

    Fecha de publicación:

    10
    2025
    Bibcode
    2025A&A...702A.151B
    Número de citas
    0
  • Con árbitro
    Testing the performance of cross-correlation techniques to search for molecular features in JWST NIRSpec G395H observations of transiting exoplanets
    Cross-correlations techniques offer an alternative method to search for molecular species in James Webb Space Telescope (JWST) observations of exoplanet atmospheres. In a previous article, we applied cross-correlation functions for the first time to JWST NIRSpec/G395H observations of exoplanet atmospheres, resulting in a detection of CO in the
    Esparza-Borges, Emma et al.

    Fecha de publicación:

    11
    2025
    Bibcode
    2025MNRAS.543.3456E
    Número de citas
    0