Massive stars in metal-poor dwarf galaxies are often extreme rotators

Bibcode
2024IAUS..361...63S
DOI
10.1017/S1743921322002538
Schootemeijer, Abel; Lennon, Danny J.; Garcia, Miriam; Langer, Norbert; Hastings, Ben; Schürmann, Christoph
Referencia bibliográfica

IAU Symposium

Fecha de publicación:
0
2024
Número de autores
6
Número de autores del IAC
1
Número de citas
0
Número de citas referidas
0
Descripción
We probe how common extremely rapid rotation is among massive stars in the early universe by measuring the OBe star fraction in nearby metal-poor dwarf galaxies. We apply a new method that uses broad-band photometry to measure the galaxy-wide OBe star fractions in the Magellanic Clouds and three more distant, more metal-poor dwarf galaxies. We find OBe star fractions of ∼20% in the Large Magallanic Cloud (0.5Zȯ), and ∼30% in the Small Magellanic Cloud (0.2Zȯ) as well as in the so-far unexplored metallicity range 0.1 Z/Zȯ < 0.2 occupied by the other three dwarf galaxies. Our results imply that extremely rapid rotation is common among massive stars in metal-poor environments such as the early universe.
Tipo
Sin árbitro
Galaxias
Nubes de Magallanes

Te puede interesar

  • Sin árbitro
    Assessment of registration methods for thermal infrared and visible images for diabetic foot monitoring
    This work presents a revision of four different registration methods for thermal infrared and visible images captured by a camera-based prototype for the remote monitoring of diabetic foot. This prototype uses low cost and off-the-shelf available sensors in thermal infrared and visible spectra. Four different methods (Geometric Optical Translation
    S. González-Pérez et al.

    Fecha de publicación:

    1
    2021
  • Sin árbitro
    Active optics control and its integration with the adaptive optics in the European Solar Telescope (EST)
    The European Solar Telescope (EST) is a 4-m class solar telescope that will include a Multiconjugate Adaptive Optics system (MCAO) integrated in the telescope optical path. Its open-dome configuration implies that the complete telescope will be exposed to wind, having an important impact in image stability and quality. The integration of Active
    León-Gil, J. et al.

    Fecha de publicación:

    7
    2024
    Bibcode
    2024SPIE13101E..44L
    Número de citas
    0
  • Sin árbitro
    The largest and most ambitious quantitative spectroscopic analysis of B-type supergiants in the Milky Way
    Empirical constraints are master keys for testing theoretical evolutionary model predictions. In massive stars, the region in the Hertzsprung-Russell diagram (HRD) in which the Blue Supergiants (BSGs) are located sets several important constraints to the models, and in particular to the theoretical end of the main sequence (MS). So far, we are
    de Burgos, Abel et al.

    Fecha de publicación:

    0
    2024
    Bibcode
    2024IAUS..361..100D
    Número de citas
    0