Long-term variability of the optical spectra of NGC 4151 - II. Evolution of the broad Hα and Hβ emission-line profiles

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Table 1:

The peak shifts in the red wing of the H $\alpha$ and H $\beta$ lines.
H $\alpha$	V_r(H $\alpha$ )	H $\beta$	V_r(H $\beta$ )
year_month	${\rm km~s^{-1}}$	year_month	${\rm km~s^{-1}}$
		2001b_11	3257
2002_1_3	3068	2002_1_3	3257
2002_4_5	3114	2002_4_6	3196
2002r_06	3068
2002r_12	2977	2002b_12	3073
mean 2002	3057 $\pm$ 57	mean 2001_11 + 2002	3197 $\pm$ 94
2003r_01	2886	2003b_01	3073
2003r_05	2613	2003b_03	3012
2003r_06	2613	2003_5_6	2889
mean 2003	2704 $\pm$ 158	mean 2003	2991 $\pm$ 94
2004r_12	2339	2004b_12	2273
2005r_02	2294	2005_1_2	2027
2005r_04	2294	2005_5_6	2027
2005r_06	2339	2005_11_12	2338
2006_1_2	2430	2006b_01	2335
		2006b_02	2335
2006r_03	2202	2006b_03	2150
2006r_04	2294	2006b_04	2027
mean 2004-2006	2313 $\pm$ 69	mean 2004-2006	2189 $\pm$ 147
maximal shift $\Delta V_{r}$ (H $\alpha$ + H $\beta )=(1072 \pm 226)~{\rm km~s^{-1}}$

Columns: 1 - year and month for H $\alpha$ (e.g., 2002_1_3 = 2002, January and March); 2 - V_r(H $\alpha$ ), H $\alpha$ peak velocity in the red wing ( ${\rm km~s^{-1}}$ ); 3 - year and month for H $\beta$ ; 4 - V_r(H $\beta$ ), H $\beta$ peak velocity in the red wing ( ${\rm km~s^{-1}}$ ). The line after each year (or interval of years) gives the mean $V_{\rm r}$ (H $\alpha$ ) and V_r(H $\beta$ ) and their standard deviations. The last line gives the maximal shift of the red peak ( $\Delta V_{r}$ ) from 2002 to 2006.

Source LaTeX | All tables | In the text

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