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27 January 2023
  » arxiv » astro-ph/9804052

 Article overview

Multiwavelength Observations of a Seyfert 1 Galaxy Detected in ACO 3627
P.A. Woudt ; R.C. Kraan-Korteweg ; A.P. Fairall ; H. Bohringer ; V. Cayatte ; I.S. Glass ;
Date 6 Apr 1998
Subject astro-ph
Affiliation1,5), R.C. Kraan-Korteweg (2,6), A.P. Fairall , H. Bohringer , V. Cayatte and I.S. Glass ( University of Cape Town, Observatoire de Paris-Meudon, MPE, Garching bei Muenchen, SAAO, Cape Town, ESO, Garching bei Muenchen and Universidad de Guanaju
AbstractACO 3627 is a rich, nearby cluster of galaxies at the core of the Great Attractor. At the low galactic latitude of b = -7.2 the galactic extinction is significant. Nevertheless, its proximity makes it a prime target for studies of environmental effects on its cluster members. Here, we report on a multi-wavelength study of a Seyfert 1 galaxy at 30 arcminutes from the centre of ACO 3627. Its Seyfert nature was discovered spectroscopically and confirmed in X-rays. We have obtained B_J and R_C CCD photometry as well as J, H, K and L aperture photometry at the SAAO, low and high resolution spectroscopy (ESO and SAAO), 21 cm line observations (Parkes Observatory) and X-ray ROSAT PSPC data. The Seyfert 1 galaxy is of morphology SBa(r). It has a nearby companion (dS0) but shows no signs of interaction. A consistent value for the galactic extinction of A_B = 1.6 mag could be determined. The nucleus of the Seyfert is very blue with a strong (B_J - R_C) colour gradient in the inner 2.5 arcsec. The extinction-corrected near-infrared colours of WKK 6092 are typical of a Seyfert 1 and the X-ray spectrum conforms to the expectation of a Seyfert as well. The galaxy has a very low HI flux. This could be explained by its morphology, but also -- due to its very central position within the rich Norma cluster -- to ram pressure stripping.
Source arXiv, astro-ph/9804052
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