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Table 1.
Description of the Gaia DR2-based catalogue of 237 strongly magnetic Ap stars with resolved magnetically split lines.
| Bytes | Format | Units | Label | Explanations | Ref |
|---|---|---|---|---|---|
| 001-024 | A24 | – | Object name | (SIMBAD) name of Ap star, typically HD...or 2MASS... | 1, 2 |
| 026-053 | A28 | – | DR2NAME | Unique Gaia source designation | 3 |
| 055-064 | F10.4 | mas | Plx | Gaia DR2 parallax | 3 |
| 066-072 | F6.4 | mas | e_Plx | Error of Gaia DR2 parallax | 3 |
| 074-083 | F10.4 | – | RPlx | Gaia DR2 parallax divided by its error | 3 |
| 085-093 | F9.3 | mas yr−1 | pmRA | Gaia DR2 proper motion component in right ascension direction (μα cos δ) | 3 |
| 095-100 | F5.3 | mas yr−1 | e_pmRA | Error of pmRA | 3 |
| 102-110 | F9.3 | mas yr−1 | pmDE | Gaia DR2 proper motion component in declination direction (μδ) | 3 |
| 112-117 | F5.3 | mas yr−1 | e_pmDE | Error of pmDE | 3 |
| 119-120 | I2 | – | Np | Gaia DR2 Nper = visibility_periods_used | 3 |
| 122-128 | F7.4 | mag | G | Gaia DR2 G magnitude | 3 |
| 130-136 | F7.4 | mag | BP | Gaia DR2 BP magnitude | 3 |
| 138-144 | f7.4 | mag | BP − RP | Gaia DR2 BP − RP colour | 3 |
| 146-153 | F8.4 | – | u | Gaia DR2 astrometric unit weight error | 3, 4, 11 |
| 155-162 | F8.3 | – | RUWE | Renormalised unit weight error (newly calibrated u) | 3, 4, 5, 11 |
| 164-169 | F6.4 | – | va_G | Variability amplitude in Gaia DR2 G band | 3, 6, 7, 11 |
| 171-176 | F6.4 | – | va_B | Variability amplitude in Gaia DR2 BP band | 3, 11 |
| 178-183 | F6.4 | – | va_R | Variability amplitude in Gaia DR2 RP band | 3, 11 |
| 185-190 | f6.2 | – | vaGs | Significance of va_G (number of standard deviations σ above the typical level of non-variable stars) | 3, 11 |
| 192-197 | f6.2 | – | vaBs | Significance of va_B (number of standard deviations σ above the typical level of non-variable stars) | 3, 11 |
| 199-204 | f6.2 | – | vaRs | Significance of va_R (number of standard deviations σ above the typical level of non-variable stars) | 3, 11 |
| 206-212 | F7.2 | K | Teff | Stellar effective temperature | 3, 8 |
| 214-220 | F7.2 | K | b_Teff | Uncertainty (lower) on Teff estimate | 3, 8 |
| 222-228 | F7.2 | K | B_Teff | Uncertainty (upper) on Teff estimate | 3, 8 |
| 230-238 | F9.3 | Solar Lum | Lum | Estimated luminosity | 3, 8 |
| 240-246 | f7.4 | mag | MG | Absolute G magnitude computed as MG = G + 5log(Plx/100) | 3, 11 |
| 248-249 | I2 | – | wf | Wide binary (common parallax and proper motion = CPPM) flag (number of CPPM companions) | 3, 11 |
| 251-252 | I2 | – | bf | Close (with respect to Gaia measurements) binary flag (0 = not known as binary) | 1 |
| 254-255 | I2 | – | cf | Cluster membership flag (number of clusters of which the star is a member) | 3, 9, 11 |
| 257-258 | I2 | – | af | Astrometric quality flag (number of criteria by which star was excluded, 0 = best, 4 = worst) | 3, 5, 11 |
| 260-261 | I2 | – | vf | Variability flag (number of photometric bands, where the star lies > 3σ above the typical variability amplitude) | 3, 11 |
| 263-268 | I6 | – | Hip | HIPPARCOS identifier | 10 |
| 270-270 | A1 | – | N | Note in first version of HIPPARCOS catalogue, here: P = note on photometry | 10 |
| 274-275 | I2 | – | Sn | Solution type new reduction, 5 = 5-parameter, 7 = 7-parameter solution, > 9 = double star with peculiarities | 10 |
| 277-278 | I2 | – | So | Solution type old reduction, 0 = 5-parameter, 1 = 7- or 9-parameter, 3 = double/multiple stars, 4 = orbital binary | 10 |
| 280-281 | I2 | – | Nc | Number of components according to HIPPARCOS | 10 |
| 286-290 | F5.2 | mas | HPlx | HIPPARCOS parallax (new reduction) | 10 |
| 293-297 | F5.2 | mas | eHPlx | Error of HIPPARCOS parallax (new reduction) | 10 |
| 299-302 | I4 | – | Ntr | Number of HIPPARCOS field transits used | 10 |
| 304-309 | f6.2 | – | F2 | HIPPARCOS goodness of fit | 10 |
| 311-313 | I3 | – | F1 | Percentage of rejected HIPPARCOS data | 10 |
| 316-322 | F7.4 | mag | HPmag | HIPPARCOS magnitude (in the optical V band of the HIPPARCOS photometric system) | 10 |
| 324-330 | f7.3 | mag | B − V | HIPPARCOSB − V colour index (in the non-conventional system) | 10 |
| 332-338 | f7.3 | mag | V − I | HIPPARCOSV − I colour index (no standard system specified) | 10 |
References.
(1) Mathys (2017); (2) Chojnowski et al. (2019); (3) Gaia Collaboration (2018b); (4) Lindegren et al. (2018); (5) Lindegren (2018); (6) Deason et al. (2017); (7) Vioque et al. (2018); (8) Andrae et al. (2018); (9) Cantat-Gaudin et al. (2018); (10) van Leeuwen (2007); (11) this paper.
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