The S2N2 metallicity calibrator and the abundance gradient of M33

Bibcode
2007MNRAS.381.1719V
DOI
10.1111/j.1365-2966.2007.12357.x
Viironen, K.; Delgado-Inglada, G.; Mampaso, A.; Magrini, L.; Corradi, R. L. M.
Referencia bibliográfica

Monthly Notices of the Royal Astronomical Society, Volume 381, Issue 4, pp. 1719-1726.

Fecha de publicación:
11
2007
Revista
Monthly Notices of the Royal Astronomical Society
Número de autores
5
Número de autores del IAC
3
Número de citas
25
Número de citas referidas
24
Descripción
We introduce the log(Hα/[SII]λλ6717+6731) versus log(Hα/[NII]λ6583) (S2N2) diagnostic diagram as a metallicity and ionization parameter indicator for HII regions in external galaxies. The location of HII regions in the S2N2 diagram was studied both empirically and theoretically. We found that, for a wide range of metallicities, the S2N2 diagram gives single-valued results in the metallicity-ionization parameter plane. We demonstrate that the S2N2 diagram is a powerful tool to estimate metallicities of high-redshift (z ~ 2) HII galaxies. Finally, we derive the metallicity for 76 HII regions in M33 from the S2N2 diagram and calculate an O/H abundance gradient for this galaxy of -0.05 (+/-0.01) dex kpc-1.
Tipo
Con árbitro
Galaxias

Te puede interesar

  • Con árbitro
    Secondary halo bias through cosmic time. I. Scaling relations and the connection with the cosmic web
    Context. The spatial distribution of dark matter halos carries cosmological and astrophysical information. Cosmological information can be considered to be contained in the connection between halo main properties and the large-scale halo bias, while the astrophysical information would be encoded in the scaling relations between halo properties. The
    Balaguera-Antolínez, Andrés et al.

    Fecha de publicación:

    5
    2024
    Bibcode
    2024A&A...685A..61B
    Número de citas
    0
  • Con árbitro
    Dramatic Drop in the X-Ray Polarization of Swift J1727.8–1613 in the Soft Spectral State
    Black hole X-ray binaries exhibit different spectral and timing properties in different accretion states. The X-ray outburst of a recently discovered and extraordinarily bright source, Swift J1727.8–1613, has enabled the first investigation of how the X-ray polarization properties of a source evolve with spectral state. The 2–8 keV polarization
    Svoboda, Jiří et al.

    Fecha de publicación:

    5
    2024
    Bibcode
    2024ApJ...966L..35S
    Número de citas
    0
  • Con árbitro
    Overmassive Black Holes at Cosmic Noon: Linking the Local and the High-redshift Universe
    We report for the first time a sample of 12 supermassive black holes (SMBHs) hosted by low-mass galaxies at cosmic noon, i.e., in a redshift range consistent with the peak of star formation history: z ∼ 1–3. These black holes are 2 orders of magnitude too massive for the stellar content of their hosts when compared with the local relation for
    Mezcua, Mar et al.

    Fecha de publicación:

    5
    2024
    Bibcode
    2024ApJ...966L..30M
    Número de citas
    0