A Comparative Study of the Microvariability Properties in Radio-loud and Radio-quiet Quasars

Bibcode
1998ApJ...501...69D
DOI
10.1086/305817
de Diego, J. A.; Dultzin-Hacyan, D.; Ramirez, A.; Benitez, E.
Referencia bibliográfica

Astrophysical Journal v.501, p.69

Fecha de publicación:
7
1998
Número de autores
4
Número de autores del IAC
0
Número de citas
66
Número de citas referidas
58
Descripción
We have performed photometric optical observations of a sample of 17 core-dominated radio-loud quasars (CRLQs) and 17 radio-quiet quasars (RQQs). The aims were to confirm the existence of microvariations in strictly radio-quiet objects and to compare the properties of the variations in both types of quasars. Great care was taken to avoid selection effects and spurious biases in the samples. We present a new observational and statistical procedure for searching for microvariability, based on the analysis of variance. The results show that microvariations in RQQs may be as frequent as in CRLQs. The implications for the physical models for microvariations are briefly discussed.
Tipo
Con árbitro
Galaxias
Fotometría
Cuásares

Te puede interesar

  • Con árbitro
    Characterisation at Cryogenic Temperatures of an Attenuator for an Application of Astrophysical Instrumentation with MKIDs
    The use of non-cryogenic certified commercial electronics for cryogenic applications may be attractive due to their cost and availability, but it also carries risks related to reliability, performance and thermal compatibility. The decision to use commercial components that are not certified for cryogenics instead of components specifically
    Rodríguez Ramos L.F. et al.

    Fecha de publicación:

    12
    2024
  • Con árbitro
    The return of FarNet-II: Generation of solar far-side magnetograms from helioseismic data
    Context. The far-side activity of the Sun can be inferred by interpreting the near-side wave field using local helioseismic techniques. However, detections are limited to strongly active regions because signal-to-noise ratio of the data is low. Recently, we developed the FarNet and FarNet-II neural networks to improve the identification of active
    Broock, E. G. et al.

    Fecha de publicación:

    12
    2024
    Bibcode
    2024A&A...692A.182B
    Número de citas
    0
  • Con árbitro
    Non-local thermodynamic equilibrium inversions of the Si I 10827 Å spectral line
    Inferring the coupling of different atmospheric layers requires observing spectral lines sensitive to the atmospheric parameters, particularly the magnetic field vector, at various heights. The best way to tackle this goal is to perform multi-line observations simultaneously. For instance, the new version of the Gregor Infrared Spectrograph
    Quintero Noda, C. et al.

    Fecha de publicación:

    12
    2024
    Bibcode
    2024A&A...692A.169Q
    Número de citas
    0