Searching for the hidden broad-line region in Centaurus A

Details Searching for the hidden broad-line region in Centaurus A Searching for the hidden broad-line region in Centaurus A

Feb 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999mnras.303l..17a&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Volume 303, Issue 2, pp. L17-L22.

Astronomy and Astrophysics

Astronomy

10

Polarization, Techniques: Polarimetric, Techniques: Spectroscopic, Galaxies: Active, Galaxies: Individual: Cen A

Scientific paper

We present the first near-infrared (K-band) spectropolarimetric observations of the nuclear region of Centaurus A. Although the data are of high signal-to-noise ratio, polarized broad Br gamma is not detected and we place a 3 sigma upper limit of 3.9 x 10-15 erg s-1 cm-2 in polarized flux. We find a correlation between the K-band nuclear continuum and broad H alpha line luminosity and estimate the strength of broad Br gamma based on a number of possible models.

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