Parameters of the H-alpha line12 Vul
| Date
year/month/day |
Equiv. width
A |
FWHM
km/s |
Peak separation
km/s |
V/R | Blue peak intens.
continuum units |
Red peak intens.
continuum units |
Centr.peak/depres
continuum units |
Reference |
| 1976/11 | 1.0: | ApJS, 38, 205, 1978 | ||||||
| 1977/06 | 1.74 | 501 | 1.17 | ApJS, 38, 205, 1978 | ||||
| 1981/06/18 | 4.7 | 419 | 0.94 | 1.6** | A&AS,53,319,1983 | |||
| 1989/10/06 | 3.74 | 463 | 283 | 0.96 | 1.40 | 1.45 | 1.25 | ApJS, 81, 335, 1992 |
| 2000/09/27 | 7.64 | 460 | 285 | 0.98 | 1.49 | 1.50 | 1.27 | This page |
* Almost flat profile at the continuum level
** The maximum intensity was measured with respect to the emission
line base below the continuum
Sample H-alpha profiles