Variability of NGC 5543: The continuum

Bibcode
1988ESASP.281b.311R
Rodriguezpascual, P. M.; Wamsteker, W.; Netzer, H.; Wills, B.
Bibliographical reference

In its Proceedings of the Celebratory Symposium on a Decade of UV Astronomy with the IUE Satellite, Volume 2 p 311-314 (SEE N89-16535 08-89)

Advertised on:
6
1988
Number of authors
4
IAC number of authors
0
Citations
3
Refereed citations
3
Description
Simultaneous UV and optical variations of NGC 5548 suggest a common origin of the continuum flux at both ranges. If the bulk of the UV flux had a black body like shape, its optical contribution would be too low to account for the observed variations, and a connection between UV and FIR changes would be needed, which is not observed. However, a flat (alpha = -0.5) UV power-law is sufficient to reproduce the simultaneous changes in the UV and optical fluxes, and gives the correct F(5500)/F(1350) ratio. Although the data are not conclusive, the shape of the UV-optical continuum seems to change only slightly from the faintest to the brightest states.
Type
Non-refereed
Seyfert galaxies
Ultraviolet astronomy

It may interest you

  • Non-refereed
    HARMONI at ELT: HIPOTEC electronics and control system
    HARMONI is the first light visible and near-IR integral field spectrograph for the ELT. It covers a large spectral range from 470nm to 2450nm with resolving powers from 3300 to 18000 and spatial sampling from 60 mas to 4 mas. It can operate in two Adaptive Optics modes - SCAO (including a High Contrast capability) and LTAO - or with NOAO. The
    Menéndez Mendoza, Saúl et al.

    Advertised on:

    7
    2024
    Bibcode
    2024SPIE13096E..4ZM
    Citations
    0
  • Non-refereed
    GTCAO low-frequency tip-tilt offload to M2
    GTCAO is the instrument that implements Adaptive Optics on GTC. For atmospheric turbulence correction, GTCAO uses a deformable mirror. Unlike other AO systems, GTCAO does not include a dedicated mirror for low-frequency tip-tilt (TT) correction. In the absence of dedicated correction, the TT components of atmospheric turbulence are corrected by the
    Marco de la Rosa, J. et al.

    Advertised on:

    8
    2024
    Bibcode
    2024SPIE13097E..7SM
    Citations
    0