Energy implications of temperature fluctuations

Bibcode
2001RMxAC..10...19B
Binette, L.; Luridiana, V.; Henney, W. J.
Referencia bibliográfica

The Seventh Texas-Mexico Conference on Astrophysics: Flows, Blows and Glows (Eds. William H. Lee and Silvia Torres-Peimbert) Revista Mexicana de Astronomía y Astrofísica (Serie de Conferencias) Vol. 10, pp. 19-22 (2001)

Fecha de publicación:
3
2001
Número de autores
3
Número de autores del IAC
0
Número de citas
5
Número de citas referidas
3
Descripción
We quantify the energy radiated through all the collisional lines in a photoionized nebula in the presence of temperature fluctuations in the form of hot spots caused by an unknown heating process. The excess energy radiated in the lines as a result of the fluctuations is found to scale linearly with their mean-square amplitude t2. We find that the combined mechanical luminosity of stellar winds, champagne flows and photoevaporation flows from proplyds is insufficient to account for the temperature fluctuations of typical HII regions, but that stellar winds may possibly explain the fluctuations in planetary nebulae.
Tipo
Sin árbitro
Regiones H II
Nebulosas planetarias

Te puede interesar

  • Sin árbitro
    ANDES, the high resolution spectrograph for the ELT: science goals, project overview, and future developments
    The first generation of ELT instruments includes an optical-infrared high resolution spectrograph, indicated as ELT-HIRES and recently christened ANDES (ArmazoNes high Dispersion Echelle Spectrograph). ANDES consists of three fibre-fed spectrographs ([U]BV, RIZ, YJH) providing a spectral resolution of ∼100,000 with a minimum simultaneous wavelength
    Marconi, A. et al.

    Fecha de publicación:

    7
    2024
    Bibcode
    2024SPIE13096E..13M
    Número de citas
    1
  • Sin árbitro
    An overview of the preliminary optical design of the European Solar Telescope (EST)
    The European Solar Telescope (EST) is a 4-m class-solar telescope that will become part of the next generation of groundbased facilities. Located at the "Observatorio del Roque de los Muchachos" in La Palma (Spain), it will be aimed to study the magnetic connectivity of the solar atmosphere with high spatial and temporal resolution. The EST optical
    Belío-Asin, Marta et al.

    Fecha de publicación:

    8
    2024
    Bibcode
    2024SPIE13094E..2GB
    Número de citas
    0
  • Sin árbitro
    ANDES, the high-resolution spectrograph for the ELT: UBV spectrograph preliminary design
    We present the design of the ANDES UBV module, the bluest spectrograph of the ANDES instrument. It is a fiber-fed high resolution, high stability spectrograph, which will be installed on the ELT-Nasmyth platform to minimize blue fibre losses from the focal plane to the spectrograph. In this paper we present the status of development of the
    Weber, Michael et al.

    Fecha de publicación:

    7
    2024
    Bibcode
    2024SPIE13096E..4AW
    Número de citas
    0