Planck 2018 results - I. Overview and the cosmological legacy of Planck

Planck 2018 results

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Table 3.

Relative velocities involving the CMB frame, the Galactic centre, and the Local Group.

Relative	Speed	l	b
velocity	[km s⁻¹]	[deg]	[deg]
Sun–CMB ^(a).......	369.82 ± 0.11	264.021 ± 0.011	48.253 ± 0.005
Sun–LSR ^(b).......	17.9 ± 2.0	48 ± 7	23 ± 4
LSR–GC ^(c).......	239 ± 5	90	0
GC–CMB ^(d).......	565 ± 5	265.76 ± 0.20	28.38 ± 0.28
Sun–LG ^(e).......	299 ± 15	98.4 ± 3.6	−5.9 ± 3.0
LG–CMB ^(d).......	620 ± 15	271.9 ± 2.0	29.6 ± 1.4

Notes.

^(a)

Velocity of the Sun relative to the CMB; Planck 2018.

^(b)

Velocity of the Sun relative to the Local Standard of Rest from Schönrich et al. (2010), adding statistical and systematic uncertainties.

^(c)

Rotational velocity of the LSR from McMillan (2011).

^(d)

Resulting velocity, using non-relativistic velocity addition and assuming uncorrelated errors.

^(e)

Velocity of the Sun relative to the Local Group from Diaz et al. (2014).

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