Searching for the hidden broad-line region in Centaurus A

被引：15
作者：
Alexander, DM
Hough, JH
Young, S
Bailey, JA
Heisler, CA
Lumsden, SL
Robinson, A
机构：
[1] Univ Hertfordshire, Dept Phys Sci, Hatfield AL10 9AB, Herts, England
[2] Anglo Australian Observ, Epping, NSW 2121, Australia
[3] Australian Natl Univ, Inst Adv Studies, Res Sch Astron & Astrophys, Mt Stromlo & Siding Spring Observ, Canberra, ACT 2611, Australia
来源：
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 1999年 / 303卷 / 02期
关键词：
polarization; techniques : polarimetric; techniques : spectroscopic; galaxies : active; galaxies : individual : Cen A;
D O I：
10.1046/j.1365-8711.1999.02327.x
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
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.
引用
收藏
页码：L17 / L22
页数：6
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