All white dwarf spectral types listed in the 40 pc sample, where photometric model composition refers to composition-selected Gentile Fusillo et al. (2021) parameters.
| Spectral type . | Number in . | Photometric model . |
|---|---|---|
| (SpT) . | 40 pc . | composition . |
| DA | 538 | pure-H (except for 2 He-rich DA) |
| DAH or DAP | 64 | pure-H |
| DA(H)e | 4 | pure-H |
| DAZ(H/P) | 53 | pure-H |
| DB(H/P) | 9 | log (H/He) = −5 |
| DBA(H/P) | 6 | log (H/He) = −5 |
| DBQA | 1 | log (H/He) = −5 |
| DBZA | 1 | log (H/He) = −5 |
| DC(H/P) | 287 | log (H/He) = −5, pure-He below 7000 K, assumed pure-H below 5000 K |
| DQ(H/P) | 34 | log (H/He) = −5, pure-He below 7000 K |
| warm DQ | 2 | pure-He |
| DQpec(H/P) | 8 | log (H/He) = −5, pure-He below 7000 K |
| DQZ | 3 | log (H/He) = −5, pure-He below 7000 K |
| DX(H/P) | 4 | dependent on individual atmospheric analysis |
| DZ(H/P) | 45 | log (H/He) = −5, pure-He below 7000 K, except pure-H for H-rich DZ |
| DZA(H/P) | 14 | log (H/He) = −5, pure-He below 7000 K, except pure-H for H-rich DZA |
| DZAB | 1 | log (H/He) = −5, pure-He below 7000 K |
| DZQ(H/P) | 2 | log (H/He) = −5, pure-He below 7000 K |
| Spectral type . | Number in . | Photometric model . |
|---|---|---|
| (SpT) . | 40 pc . | composition . |
| DA | 538 | pure-H (except for 2 He-rich DA) |
| DAH or DAP | 64 | pure-H |
| DA(H)e | 4 | pure-H |
| DAZ(H/P) | 53 | pure-H |
| DB(H/P) | 9 | log (H/He) = −5 |
| DBA(H/P) | 6 | log (H/He) = −5 |
| DBQA | 1 | log (H/He) = −5 |
| DBZA | 1 | log (H/He) = −5 |
| DC(H/P) | 287 | log (H/He) = −5, pure-He below 7000 K, assumed pure-H below 5000 K |
| DQ(H/P) | 34 | log (H/He) = −5, pure-He below 7000 K |
| warm DQ | 2 | pure-He |
| DQpec(H/P) | 8 | log (H/He) = −5, pure-He below 7000 K |
| DQZ | 3 | log (H/He) = −5, pure-He below 7000 K |
| DX(H/P) | 4 | dependent on individual atmospheric analysis |
| DZ(H/P) | 45 | log (H/He) = −5, pure-He below 7000 K, except pure-H for H-rich DZ |
| DZA(H/P) | 14 | log (H/He) = −5, pure-He below 7000 K, except pure-H for H-rich DZA |
| DZAB | 1 | log (H/He) = −5, pure-He below 7000 K |
| DZQ(H/P) | 2 | log (H/He) = −5, pure-He below 7000 K |
Spectral types ending with H (Zeeman splitting) or P (polarized) imply magnetism, which does not impact atmospheric composition. In all cases other than for DA and DAH/P, we add (H/P) to spectral types to note that some white dwarfs in that group are magnetic. The lowercase ‘e’ indicates the presence of emission features.
All white dwarf spectral types listed in the 40 pc sample, where photometric model composition refers to composition-selected Gentile Fusillo et al. (2021) parameters.
| Spectral type . | Number in . | Photometric model . |
|---|---|---|
| (SpT) . | 40 pc . | composition . |
| DA | 538 | pure-H (except for 2 He-rich DA) |
| DAH or DAP | 64 | pure-H |
| DA(H)e | 4 | pure-H |
| DAZ(H/P) | 53 | pure-H |
| DB(H/P) | 9 | log (H/He) = −5 |
| DBA(H/P) | 6 | log (H/He) = −5 |
| DBQA | 1 | log (H/He) = −5 |
| DBZA | 1 | log (H/He) = −5 |
| DC(H/P) | 287 | log (H/He) = −5, pure-He below 7000 K, assumed pure-H below 5000 K |
| DQ(H/P) | 34 | log (H/He) = −5, pure-He below 7000 K |
| warm DQ | 2 | pure-He |
| DQpec(H/P) | 8 | log (H/He) = −5, pure-He below 7000 K |
| DQZ | 3 | log (H/He) = −5, pure-He below 7000 K |
| DX(H/P) | 4 | dependent on individual atmospheric analysis |
| DZ(H/P) | 45 | log (H/He) = −5, pure-He below 7000 K, except pure-H for H-rich DZ |
| DZA(H/P) | 14 | log (H/He) = −5, pure-He below 7000 K, except pure-H for H-rich DZA |
| DZAB | 1 | log (H/He) = −5, pure-He below 7000 K |
| DZQ(H/P) | 2 | log (H/He) = −5, pure-He below 7000 K |
| Spectral type . | Number in . | Photometric model . |
|---|---|---|
| (SpT) . | 40 pc . | composition . |
| DA | 538 | pure-H (except for 2 He-rich DA) |
| DAH or DAP | 64 | pure-H |
| DA(H)e | 4 | pure-H |
| DAZ(H/P) | 53 | pure-H |
| DB(H/P) | 9 | log (H/He) = −5 |
| DBA(H/P) | 6 | log (H/He) = −5 |
| DBQA | 1 | log (H/He) = −5 |
| DBZA | 1 | log (H/He) = −5 |
| DC(H/P) | 287 | log (H/He) = −5, pure-He below 7000 K, assumed pure-H below 5000 K |
| DQ(H/P) | 34 | log (H/He) = −5, pure-He below 7000 K |
| warm DQ | 2 | pure-He |
| DQpec(H/P) | 8 | log (H/He) = −5, pure-He below 7000 K |
| DQZ | 3 | log (H/He) = −5, pure-He below 7000 K |
| DX(H/P) | 4 | dependent on individual atmospheric analysis |
| DZ(H/P) | 45 | log (H/He) = −5, pure-He below 7000 K, except pure-H for H-rich DZ |
| DZA(H/P) | 14 | log (H/He) = −5, pure-He below 7000 K, except pure-H for H-rich DZA |
| DZAB | 1 | log (H/He) = −5, pure-He below 7000 K |
| DZQ(H/P) | 2 | log (H/He) = −5, pure-He below 7000 K |
Spectral types ending with H (Zeeman splitting) or P (polarized) imply magnetism, which does not impact atmospheric composition. In all cases other than for DA and DAH/P, we add (H/P) to spectral types to note that some white dwarfs in that group are magnetic. The lowercase ‘e’ indicates the presence of emission features.
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