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Gas Disks and Supermassive Black Holes in Nearby Radio Galaxies

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Table 3.4. Spectral L<strong>in</strong>es <strong>in</strong> the region of Hα.<br />

Ion Ref. Transition λair λvac<br />

(˚A) (˚A)<br />

(1) (2) (3) (4) (5)<br />

[N II] (a) 3 P1 − 1 D2 6548.05 6549.86<br />

Hα (b) 6562.80 6564.61<br />

[N II] (a) 3 P2 − 1 D2 6583.39 6585.21<br />

[S II] (a) 4 S3/2 − 2 D5/2 6716.44 6718.29<br />

[S II] (a) 4 S3/2 − 2 D3/2 6730.81 6732.67<br />

Note. — Col. (1): Ion responsible for the l<strong>in</strong>e;<br />

Col. (2): Wavelength reference; Col. (3): Transition<br />

configuration terms; Col. (4): Air wavelength;<br />

Col. (5): Vacuum wavelength. Note<br />

that the value for Hα is computed from the <strong>in</strong>tensity<br />

weighted mean of f<strong>in</strong>e structure l<strong>in</strong>es at<br />

λair = 6562.7247 <strong>and</strong> λair = 6562.8516 with relative<br />

<strong>in</strong>tensities of 120 <strong>and</strong> 180 respectively.<br />

References. — (a) Wallerste<strong>in</strong>, et al. (2001);<br />

(b) Reader & Corliss (1998)<br />

92

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