Table 1
Kinematic characteristics of the main line profiles in the U Sco spectrum.
| Line | Rest wavelength | Velocities of line componentsa | EW b | FWHM c | Em/abs | Notes | ||
| (Å) | Blue | Red | center of line | (Å) | (Å) | |||
| (km s-1) | (km s-1) | (km s-1) | ||||||
|
|
||||||||
| Hα | 6563 | –2915 | 3283 | 150 | –309 ± 5 | 109 | em | ejecta |
| NaD1 | 5896 | –44 | – | – | 0.231 ± 0.003 | 1.11 | abs | IS |
| –206 | – | – | 0.044 ± 0.002 | 1.34 | abs | IS | ||
| NaD2 | 5890 | –45 | – | – | 0.313 ± 0.003 | 1.15 | abs | IS |
| –174 | – | – | 0.016 ± 0.003 | 0.85 | abs | IS | ||
| Hβ | 4874 | –2966 | 3287 | –390 | –145 ± 5 | 129 | em | ejecta |
| –3854 | – | – | – | – | abs | ejecta | ||
| –5864 | – | – | – | – | abs | ejecta | ||
| Hγ | 4342 | – | – | 584 | –138 ± 6 | 99 | em | ejecta |
| –3806 | – | – | – | – | abs | ejecta | ||
| –5864 | – | – | – | – | abs | ejecta | ||
| Hδ | 4100 | – | – | 370 | –110 ± 10 | 87 | em | ejecta |
| –3786 | – | – | – | – | abs | ejecta | ||
| –4304 | – | – | – | – | abs | ejecta | ||
| CaII H | 3968 | –45 | – | – | 0.115 ± 0.012 | 0.937 | abs | IS |
| –187 | – | – | 0.009 ± 0.002 | 0.618 | abs | IS | ||
| –1547 | – | – | 2.340 ± 0.050 | 14.92 | abs | ejecta | ||
| CaII K | 3934 | –49 | – | – | 0.181 ± 0.023 | 0.902 | abs | IS |
| –187 | – | – | 0.018 ± 0.005 | 0.617 | abs | IS | ||
| –1106d | – | – | 3.580 ± 0.060 | 10.32 | abs | ejecta | ||
Notes.
The blue/red velocities in the line profiles presented here were measured from the average spectrum with a Gaussian fit; the average error in the velocities is 2 km s-1. The velocities of the central components of the Balmer lines weremeasured ith IRAF/splot’s task “e”, providing an average error of 5 km s-1.
Measured from the average spectrum. Following the conventional IRAF nomeclature, negative EW values correspond to emission lines. The errors in the measurements correspond to uncertainties in the determination of the line continuum.
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