Table 1.
Values of the warp up (Zup) and down (Zdown) altitude with respect to the Galactic plane at Galactocentric radius R = 14 kpc expressed in kpc.
| Source | Zup | Zdown | Wavelength |
|---|---|---|---|
| OB (this work) | 0.23 | −0.19 | Gaia optical |
| RGB (this work) | 0.97 | −1.22 | Gaia optical |
| D01 | 1.34 | ∼ | COBE/DIRBE NIR & FIR |
| LC02 | 1.23 | ∼ | 2MASS NIR |
| Y04 | 0.62 | −0.58 | ATNF pulsars |
| M06 (dust) | 0.74 | −0.68 | 2MASS NIR |
| R09 | 0.50 | ∼ | 2MASS NIR |
| A17 (0.5 Gyr) | 3.3 | −0.4 | 2MASS NIR |
| A17 (2.5 Gyr) | 2.1 | −1.2 | 2MASS NIR |
| A17 (4.0 Gyr) | 2.0 | −1.7 | 2MASS NIR |
| A17 (6.0 Gyr) | 3.9 | −2.7 | 2MASS NIR |
Notes. If the authors report an average value or find no difference between the up and down side, we specify it with the symbol ∼ in the Zdown column. We refer to Drimmel & Spergel (2001) as D01, López-Corredoira et al. (2002) as LC02, Yusifov (2004) as Y04 using ATNF Pulsar catalogue (Manchester et al. 2005), Marshall et al. (2006) as M06, Reylé et al. (2009) as R09, Amôres et al. (2017) as A17. For the Amôres et al. (2017) we indicate in parenthesis the mean age of the population.
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