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  • Dietrich, M. (author)

Monitoring of active galactic nuclei. IV. The Seyfert 1 galaxy NGC 4593

  • Article/chapterEnglish1994

Publisher, publication year, extent ...

  • 1994
  • printrdacarrier

Numbers

  • LIBRIS-ID:oai:DiVA.org:uu-197168
  • https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-197168URI

Supplementary language notes

  • Language:English
  • Summary in:English

Part of subdatabase

Classification

  • Subject category:ref swepub-contenttype
  • Subject category:art swepub-publicationtype

Notes

  • Results of a five-month campaign of optical monitoring the Seyfert 1 galaxy NGC 4593 are presented. High resolution Halpha and Hbeta spectra and direct images in the Johnson U, B, V, R and I bands were obtained between January and June 1990. The emission lines and the continuum showed strong variations on time scales of weeks to days. The Halpha line varied by more than 30% within only 5 days. Cross-correlating the light curves of the Balmer lines with that of the optical continuum gives a lag of around 4 days. Therefore, this low luminosity Seyfert galaxy may have one of the smallest broad line regions known so far

Subject headings and genre

  • NATURVETENSKAP Fysik Astronomi, astrofysik och kosmologi hsv//swe
  • NATURAL SCIENCES Physical Sciences Astronomy, Astrophysics and Cosmology hsv//eng
  • Experimental/ astronomical photometry
  • astronomical spectra
  • Seyfert galaxies
  • visible astronomical observations/ Seyfert 1 galaxy
  • NGC 4593
  • optical monitoring
  • active galactic nucleus
  • Hbeta spectral line
  • direct images
  • Johnson UBVRI bands
  • AD 1990 01 to 06
  • emission lines
  • optical continuum variations
  • Halpha line
  • light curves
  • Balmer lines
  • visible
  • low luminosity Seyfert galaxy
  • broad line region size
  • 450 to 540 nm
  • 620 to 720 nm
  • H/ A9850R Active and peculiar galaxies A9580J Photographic region astronomical observations A9850G Radiation and spectra of galaxies/ wavelength 4.5E-07 to 5.4E-07 m
  • wavelength 6.2E-07 to 7.2E-07 m/ H/el

Added entries (persons, corporate bodies, meetings, titles ...)

  • Kollatschny, W. (author)
  • Alloin, D. (author)
  • Aretxaga, I. (author)
  • Axon, D. (author)
  • de Bruyn, A. G. (author)
  • Clavel, J. (author)
  • Goad, M. R. (author)
  • Gondhalekar, P. (author)
  • van Groningen, E. (author)
  • Horne, K. (author)
  • Jackson, N. (author)
  • Laurikainen, E. (author)
  • Lawrence, A. (author)
  • Masegosa, J. (author)
  • Moles, M. (author)
  • O'Brien, P. (author)
  • del Olmo, A. (author)
  • Penston, M. V. (author)
  • Perea, J. (author)
  • Perez, E. (author)
  • Perez-Fournon, I. (author)
  • Perry, J. J. (author)
  • Petersons, B. M. (author)
  • Robinson, A. (author)
  • Rodriguez Espinosa, J. M. (author)
  • Stirpe, G. M. (author)
  • Tadhunter, C. (author)
  • Terlevich, R. (author)
  • Unger, S. (author)
  • Wagner, S. J. (author)
  • Wanders, I. (author)
  • Williams, R. (author)

Related titles

  • In:Astronomy and Astrophysics284:1, s. 33-43430004-63611432-0746

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