EDP Sciences
Free Access
Volume 386, Number 3, May II 2002
Page(s) 854 - 859
Section Extragalactic astronomy
DOI https://doi.org/10.1051/0004-6361:20020270

A&A 386, 854-859 (2002)
DOI: 10.1051/0004-6361:20020270

Near infrared observations of soft X-ray selected AGN

D. Grupe1 and H.-C. Thomas2

1  MPI für extraterrestrische Physik, Postfach 1312, 85741 Garching, Germany
2  MPI für Astrophysik, Karl-Schwarzschild-Str. 1, 85748 Garching, Germany

(Received 19 December 2001 / Accepted 20 February 2002)

We report the results of near infrared observations of 19 soft X-ray selected AGN. The goal of the observations was to search for strong, narrow Pa $\alpha$ or Br $\gamma$ emission lines, as a sign of nuclear starbursts. We found Pa $\alpha$ emission in the spectra of 11 sources and Br $\gamma$ in at least five. Strong NIR emission has been found in two sources, CBS 126 and Mkn 766, both objects with strong [OIII] $\lambda$5007 emission, weak Fe II emission and wavelength dependent degree of polarization in the optical. Classical Narrow Line Seyfert 1 galaxies do not show exceptionally strong NIR emission lines. We present the results of our study and discuss how our findings fit into an evolutionary scheme of AGN.

Key words: accretion, accretion disks -- galaxies: active -- galaxies: nuclei -- galaxies: Seyfert

Offprint request: D. Grupe, dgrupe@xray.mpe.mpg.de

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