H II regions in Sextans A

Bibcode
1992A&A...260...77A
Aparicio, A.; Rodriguez-Ulloa, J. A.
Bibliographical reference

Astronomy and Astrophysics (ISSN 0004-6361), vol. 260, no. 1-2, p. 77-81.

Advertised on:
7
1992
Number of authors
2
IAC number of authors
1
Citations
13
Refereed citations
12
Description
CCD narrow-band H-alpha photometry of the Sextans A Local Group dwarf irregular galaxy is presented. Fourteen H II regions have been recorded. Their identification charts, H-alpha luminosities and sizes are given, and their luminosity and size distributions are discussed. Twenty-five stars with masses between 15 and 30 solar masses, distributed following the IMF of Sextans A, are enough to produce the ionization observed in the galaxy.
Type
Refereed
Dwarf galaxies
H II regions
Irregular galaxies

It may interest you

  • Refereed
    Planetary nebula evolution for single stellar models. The formation of neutral spikes
    Two-dimensional hydrodynamical simulations are presented from the formation up to the late evolution of planetary nebula, for six different stellar models from 1 to 5 M $_{\odot }$. The hydrodynamical models use stellar evolution calculations as inner boundary conditions and updated values for the number of ionizing photons. Special emphasis is
    García-Segura, Guillermo et al.

    Advertised on:

    11
    2025
    Bibcode
    2025MNRAS.543.3867G
    Citations
    0
  • Refereed
    SN 2024bfu, SN 2025qe, and the early light curves of type Iax supernovae
    Type Iax supernovae (SNe Iax) are one of the most common subclasses of thermonuclear supernova and yet their sample size, particularly those observed shortly after explosion, remains relatively small. In this paper, we present photometric and spectroscopic observations of two SNe Iax discovered shortly after explosion, SN 2024bfu and SN 2025qe
    Magee, M. R. et al.

    Advertised on:

    11
    2025
    Bibcode
    2025MNRAS.543.3731M
    Citations
    0
  • Refereed
    Aligned, Multiple-transient Events in the First Palomar Sky Survey
    Old, digitized astronomical images taken before the human spacefaring age offer a rare glimpse of the sky before the era of artificial satellites. In this paper, we present the first optical searches for artificial objects with high specular reflections near the Earth. We follow the method proposed in Villarroel et al. and use a transient sample
    Villarroel, Beatriz et al.

    Advertised on:

    10
    2025
    Bibcode
    2025PASP..137j4504V
    Citations
    0