Table 2
Diagnostic nitrogen lines in the optical (and adjacent) spectrum of early B- and O-type stars, together with potential blends.
| Ion | Transition | Multiplet | Line | Wavelength (Å) | Blends | Used |
|
|
||||||
| N ii | N29–N216 | 12 | 1 | 3994.99 | – | + |
| N211–N219 | 15 | 2 | 4447.03 | O iiλ4446.81, 4447.67, 4448.19, O iiiλ4447.79 | + | |
| N28–N215 | 5 | 3 | 4601.47 | O iiλ4602.13, 4603.23, N iiiλ4604.18 | + | |
| N28–N215 | 5 | 4 | 4607.16 | O iiλ4609.44, 4610.20, N iiiλ4605.16, Ne iiλ4606.70 | + | |
| N28–N215 | 5 | 5 | 4621.39 | O iiλ4621.27, N iiiλ4621.04, 4623.05, Si iiλ4621.72 | + | |
| N28–N215 | 5 | 6 | 4630.54 | O iiiλ4630.77, N iiiλ4630.61, Si ivλ4631.24 | + | |
| N28–N215 | 5 | 7 | 4643.09 | O iiλ4641.81, 4643.89, N iiiλ4641.85 | – | |
| N212–N218 | 19 | 8 | 5005.15 | O iiiλ5006.84 | – | |
| N214–N221 | 24 | 9 | 5007.33 | O iiiλ5006.84 | – | |
| N28–N214 | 4 | 10 | 5045.10 | N iiλ5046.53 | – | |
| N28–N212 | 3 | 11 | 5666.63 | C iiλ5662.47 | – | |
| N28–N212 | 3 | 12 | 5676.01 | N iiλ5679.55 | – | |
| N28–N212 | 3 | 13 | 5679.55 | N iiλ5676.01 | – | |
| N28–N212 | 3 | 14 | 5710.77 | Si iiλ5707.20 | – | |
| N215–N220 | 28 | 15 | 5941.65 | N iiλ5940.24, N iiiλ5943.44 | – | |
|
|
||||||
| N iii | N320-N333 | 17 | 1 | 4003.58 | O iiλ4007.46 | + |
| N38–N310 | 1 | 2 | 4097.33 | O iiλ4097.26, 4098.24, Hδλ4101.74 | + | |
| N313–N322 | 6 | 3 | 4195.76 | O iiλ4192.52, 4196.26, Si iiiλ4195.59, He iiλ4200.00 | + | |
| N313–N322 | 6 | 4 | 4200.07 | He iiλ4200.00 | – | |
| N321–N334 | 18 | 5 | 4379.11 | O iiλ4378.03, 4378.43, C iiiλ4379.47, N iiλ4379.59 | + | |
| N312–N316 | 3 | 6 | 4510.88 | N iiiλ4510.92, Ne iiλ4511.42 | + | |
| N312–N316 | 3 | 7 | 4514.86 | O iiiλ4513.83, Ne iiλ4514.88, C iiiλ4515.81, 4516.77 | + | |
| N312–N316 | 3 | 8 | 4518.14 | Ne iiλ4518.14, O iiiλ4519.62 | + | |
| N310–N311 | 2 | 9 | 4634.14 | Si ivλ4631.24, O ivλ4632 | + | |
| N310–N311 | 2 | 10 | 4640.64 | O iiλ4638.86, Si iiiλ4638.28 | + | |
| N310–N311 | 2 | 11 | 4641.85 | O iiλ4641.81, 4643.39, N iiλ4643.08 | + | |
| N322–N330 | 21 | 12 | 5320.82 | O iiλ5322.53 | – | |
| N322–N330 | 21 | 13 | 5327.18 | – | – | |
| N319–N325 | 14 | 14 | 6445.34 | – | – | |
| N319–N325 | 14 | 15 | 6450.79 | C ivλ6449.90 | – | |
| N319–N325 | 14 | 16 | 6454.08 | O iiλ6457.05, N iiλ6457.68 | – | |
| N319–N325 | 14 | 17 | 6467.02 | – | – | |
|
|
||||||
| N iv | N47–N410 | 1 | 1 | 3478.71 | – | + |
| N47–N410 | 1 | 2 | 3482.99 | – | + | |
| N47–N410 | 1 | 3 | 3484.96 | – | + | |
| N49–N412 | 3 | 4 | 4057.76 | C iiiλ4056.06, 4059.56 | + | |
| N48–N49 | 2 | 5 | 6380.77 | O iiiλ6378.34, 6383.30, DIBs λλ 6376.08,6379.32 | + | |
| N413–N416 | 5 | 6 | 5200.41 | O ivλ5198.22 | – | |
| N413–N416 | 5 | 7 | 5204.28 | N ivλ5205.15 | – | |
| N413–N416 | 5 | 8 | 5205.15 | N ivλ5204.28, O iiλ5206.65 | – | |
| N410–N411 | 4 | 9 | 7103.24 | – | + | |
| N410–N411 | 4 | 10 | 7109.35 | – | + | |
| N410–N411 | 4 | 11 | 7111.28 | – | + | |
| N410–N411 | 4 | 12 | 7122.98 | – | + | |
| N410–N411 | 4 | 13 | 7127.25 | – | + | |
| N410–N411 | 4 | 14 | 7129.18 | – | + | |
|
|
||||||
| N v | N53–N54 | 1 | 1 | 4603.73 | N iiiλ4604.18, 4605.16, N ivλ4606.33 | + |
| N53–N54 | 1 | 2 | 4619.98 | Si iiiλ4619.66, N iiiλ4621.04, 4623.05 | + | |
| N518–N525 | 9 | 3 | 4943.17 | O ivλ4941.29 | – | |
| N519–N526 | 10 | 4 | 4943.97 | O ivλ4941.29 | – | |
| N520–N527 | 10.01 | 5 | 4945.29 | - | - | |
Notes. Line numbers for N ii, N iv and N v refer to important transitions as indicated in Figs. A.1 − A.3, respectively, and for N iii to the corresponding Fig. B.1 in Paper I. Multiplet numbers for N ii/N iii are from Moore (1975), and for N iv/N v from Moore (1971). Lines used within the present work are labeled by “+”. Lower and upper levels of the transitions are denoted by a combination of ion and level number according to Tables A.1 − A.3, e.g., “N29” means level #9 of N ii.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.