The influence of spot saturation on DIMM seeing measurements

Bibcode
2004SPIE.5382..656V
DOI
10.1117/12.566376
Varela, Antonia M.; Munoz-Tunon, Casiana; Vernin, Jean
Referencia bibliográfica

Second Backaskog Workshop on Extremely Large Telescopes. Edited by Ardeberg, Arne L.; Andersen, Torben. Proceedings of the SPIE, Volume 5382, pp. 656-660 (2004).

Fecha de publicación:
7
2004
Número de autores
3
Número de autores del IAC
2
Número de citas
3
Número de citas referidas
2
Descripción
The DIMM is a widely accepted and often used instrument for seeing measurements. Nevertheless, its incorrect use may give rise to errors in seeing values. A detailed analysis of the parameters involved in the seeing calculation is being undertaken and the effect of saturation of the spots in particular is analyzed in this contribution. Our results reveal that the saturation increases not only the photon noise but also the speckles, which will acquire a greater relative weight with respect to the stellar spot. The result is an increase in the variance of the centroids, which results in artifically higher seeing values.
Tipo
Sin árbitro

Te puede interesar

  • Sin árbitro
    Einasto Gravitational Potentials have Difficulty to Hold Spherically Symmetric Stellar Systems with Cores
    It was known that an ideal spherically symmetric stellar system with isotropic velocities and an inner core cannot reside in a Navarro, Frenk, and White (NFW) gravitational potential. The incompatibility can be pinned down to the radial gradient of the NFW potential in the very center of the system, which differs from zero. The gradient is
    Sánchez Almeida, Jorge

    Fecha de publicación:

    6
    2024
    Bibcode
    2024RNAAS...8..167S
    Número de citas
    0
  • Sin árbitro
    The Aligned Orbit of a Hot Jupiter around the M Dwarf TOI-4201
    Measuring the obliquities of stars hosting giant planets may shed light on the dynamical history of planetary systems. Significant efforts have been made to measure the obliquities of FGK stars with hot Jupiters, mainly based on observations of the Rossiter–McLaughlin effect. In contrast, M dwarfs with hot Jupiters have hardly been explored because
    Gan, Tianjun et al.

    Fecha de publicación:

    7
    2024
    Bibcode
    2024ApJ...969L..24G
  • Sin árbitro
    A Systematic Search for and Characterization of White Dwarf Binaries Across the H-R Diagram
    White dwarfs (WDs) are the endpoint of evolution for 97% of stars. Most of these stars are in multiple systems, and a significant fraction of those are compact enough to exchange mass, altering the structures and subsequent evolution of both stars. The physical mechanisms that facilitate these mass exchanges include common envelope evolution, Roche
    Anguiano, Borja et al.

    Fecha de publicación:

    6
    2024
    Bibcode
    2024AAS...24410807A
    Número de citas
    0