Open Access
Table 3
pylick spectral indices.
| Index | Central bandpass | Blue continuum | Red continuum | Units | Type | Ref. |
|---|---|---|---|---|---|---|
| BL1302 | 1292.000–1312.000 | 1270.000–1290.000 | 1345.000–1365.000 | Å | atomic(a) | 3 |
| OI+SiII1303 | 1290.000–1307.000 | 1268.000–1286.000 | 1308.000–1324.000 | Å | atomic | 9 |
| CII1335 | 1326.000–1340.000 | 1308.000–1324.000 | 1348.000–1378.000 | Å | atomic | 9 |
| SiIV1400 | 1380.000–1407.000 | 1348.000–1378.000 | 1433.000–1460.000 | Å | atomic | this work(e) |
| SiIV | 1387.000–1407.000 | 1345.000–1365.000 | 1475.000–1495.000 | Å | atomic | 3 |
| BL1425 | 1415.000–1435.000 | 1345.000–1365.000 | 1475.000–1495.000 | Å | atomic | 3 |
| Fe1453 | 1440.000–1466.000 | 1345.000–1365.000 | 1475.000–1495.000 | Å | atomic | 3 |
| SiII1526 | 1521.000–1533.000 | 1460.000–1495.000 | 1572.000–1599.000 | Å | atomic | this work(e) |
 |
1530.000–1550.000 | 1500.000–1520.000 | 1577.000–1597.000 | Å | atomic | 3 |
| CIV | 1540.000–1560.000 | 1500.000–1520.000 | 1577.000–1597.000 | Å | atomic | 3 |
 |
1550.000–1570.000 | 1500.000–1520.000 | 1577.000–1597.000 | Å | atomic | 3 |
| FeII1608 | 1600.000–1616.000 | 1583.000–1599.000 | 1614.000–1632.000 | Å | atomic | this work(e) |
| BL1617 | 1604.000–1630.000 | 1577.000–1597.000 | 1685.000–1705.000 | Å | atomic | 3 |
| HeII 1640 | 1634.000–1654.000 | 1614.000–1632.000 | 1680.000–1705.000 | Å | atomic | this work |
| BL1664 | 1651.000–1677.000 | 1577.000–1597.000 | 1685.000–1705.000 | Å | atomic | 3 |
| OIII] 1666 | 1663.000–1668.000 | 1614.000–1632.000 | 1680.000–1705.000 | Å | atomic | this work |
| AlII1670 | 1663.000–1679.000 | 1614.000–1632.000 | 1680.000–1705.000 | Å | atomic | 9 |
| BL1719 | 1709.000–1729.000 | 1685.000–1705.000 | 1803.000–1823.000 | Å | atomic | 3 |
| BL1853 | 1838.000–1868.000 | 1803.000–1823.000 | 1885.000–1915.000 | Å | atomic | 3 |
| AlIII1860 | 1840.000–1873.000 | 1815.000–1839.000 | 1932.000–1948.000 | Å | atomic | 9 |
| CIII 1909 | 1897.000–1919.000 | 1815.000–1839.000 | 1932.000–1948.000 | Å | atomic | this work |
| FeII2370 | 2334.000–2391.000 | 2267.000–2290.000 | 2395.000–2450.000 | Å | atomic | 9 |
| FeII2402 | 2382.000–2422.000 | 2285.000–2325.000 | 2432.000–2458.000 | Å | atomic | 3 |
| BL2538 | 2520.000–2556.000 | 2432.000–2458.000 | 2562.000–2588.000 | Å | atomic | 3 |
| FeII2600 | 2578.000–2611.000 | 2525.000–2572.000 | 2613.000–2674.000 | Å | atomic | 9 |
| FeII2609 | 2596.000–2622.000 | 2562.000–2588.000 | 2647.000–2673.000 | Å | atomic | 3 |
| B(2640) | 2600.000–2630.000 | 2645.000–2675.000 | dex | breaksλ(b) | 7 | |
| MgII2800 | 2788.000–2810.000 | 2720.000–2785.000 | 2812.000–2842.000 | Å | atomic | 9 |
| MgII | 2784.000–2814.000 | 2762.000–2782.000 | 2818.000–2838.000 | Å | atomic | 3 |
| MgI | 2839.000–2865.000 | 2818.000–2838.000 | 2906.000–2936.000 | Å | atomic | 3 |
| MgUV | 2625.000–2725.000 | 2525.000–2625.000 | 2725.000–2825.000 | dex | bump(c) | 4 |
| 2670.000–2870.000 | 2470.000–2670.000 | 2930.000–3130.000 | Å | atomic | 3 | |
| B(2900) | 2855.000–2885.000 | 2915.000–2945.000 | dex | break(b) | 7 | |
| FeI | 2965.000–3025.000 | 2906.000–2936.000 | 3031.000–3051.000 | Å | atomic | 3 |
| BL3096 | 3086.000–3106.000 | 3031.000–3051.000 | 3115.000–3155.000 | Å | atomic | 3 |
| CaII K | 3925.650–3945.000 | 3845.000–3880.000 | 3950.000–3954.000 | Å | atomic | 8 |
| CaIIH | 3959.400–3975.000 | 3950.000–3954.000 | 3983.000–3993.000 | Å | atomic | 8 |
| D4000 | 3750.000–3950.000 | 4050.000–4250.000 | dex | breakv | 5 | |
| Dn4000 | 3850.000–3950.000 | 4000.000–4100.000 | dex | breakv | 6 | |
| HδA | 4083.500–4122.250 | 4041.600–4079.750 | 4128.500–4161.000 | Å | atomic | 2 |
| HδF | 4091.000–4112.250 | 4057.250–4088.500 | 4114.750–4137.250 | Å | atomic | 2 |
| CN1 | 4142.125–4177.125 | 4080.125–4117.625 | 4244.125–4284.125 | mag | molecular(d) | 1 |
| CN2 | 4142.125–4177.125 | 4083.875–4096.375 | 4244.125–4284.125 | mag | molecular | 1 |
| Ca4227 | 4222.250–4234.750 | 4211.000–4219.750 | 4241.000–4251.000 | Å | atomic | 1 |
| G4300 | 4281.375–4316.375 | 4266.375–4282.625 | 4318.875–4335.125 | Å | atomic | 1 |
| HγA | 4319.750–4363.500 | 4283.500–4319.750 | 4367.250–4419.750 | Å | atomic | 2 |
| HγF | 4331.250–4352.250 | 4283.500–4319.750 | 4354.750–4384.750 | Å | atomic | 2 |
| Fe4383 | 4369.125–4420.375 | 4359.125–4370.375 | 4442.875–4455.375 | Å | atomic | 1 |
| Ca4455 | 4452.125–4474.625 | 4445.875–4454.625 | 4477.125–4492.125 | Å | atomic | 1 |
| Fe4531 | 4514.250–4559.250 | 4504.250–4514.250 | 4560.500–4579.250 | Å | atomic | 1 |
| C24668 | 4634.000–4720.250 | 4611.500–4630.250 | 4742.750–4756.500 | Å | atomic | 1 |
| Hß | 4847.875–4876.625 | 4827.875–4847.875 | 4876.625–4891.625 | Å | atomic | 1 |
| Fe5015 | 4977.750–5054.000 | 4946.500–4977.750 | 5054.000–5065.250 | Å | atomic | 1 |
| Mg1 | 5069.125–5134.125 | 4895.125–4957.625 | 5301.125–5366.125 | mag | molecular | 1 |
| Mg2 | 5154.125–5196.625 | 4895.125–4957.625 | 5301.125–5366.125 | mag | molecular | 1 |
| Mgb | 5160.125–5192.625 | 5142.625–5161.375 | 5191.375–5206.375 | Å | atomic | 1 |
| Fe5270 | 5245.650–5285.650 | 5233.150–5248.150 | 5285.650–5318.150 | Å | atomic | 1 |
| Fe5335 | 5312.125–5352.125 | 5304.625–5315.875 | 5353.375–5363.375 | Å | atomic | 1 |
Notes. (a) Borghi et al. (2022) Eq. (1); (b) Borghi et al. (2022) Eq. (2); (c) Borghi et al. (2022) Eq. (4); (d) as Borghi et al. (2022) Eq. (4), but integrating over F(λ)d(λ), instead of F(v)dv; (e) these indices were firstly defined by Leitherer et al. (2011), but here we present a slightly modified version.
References. 1: Trager et al. (1998); 2: Worthey & Ottaviani (1997); 3: Maraston et al. (2009); 4: Daddi et al. (2005); 5: Bruzual A. (1983); 6: Balogh et al. (1999); 7: Spinrad et al. (1997); 8: Fanfani (2019); 9: Leitherer et al. (2011).
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