Planck 2013 results. XXVII. Doppler boosting of the CMB: Eppur si muove

Planck Collaboration,; N. Aghanim; C. Armitage-Caplan; M. Arnaud; M. Ashdown; F. Atrio-Barandela; J. Aumont; A. J. Banday; R. B. Barreiro; J. G. Bartlett; K. Benabed; A. Benoit-Lévy; J. -P. Bernard; M. Bersanelli; P. Bielewicz; J. Bobin; Jacob Bock; J. R. Bond; J. Borrill; F. R. Bouchet; M. Bridges; C. Burigana; Robb Butler; J. F. Cardoso; A. Catalano; A. Challinor; A. Chamballu; Lung-Yih Chiang; H. C. Chiang; P. R. Christensen; D. L. Clements; L. P. L. Colombo; F. Couchot; B. P. Crill; F. Cuttaia; L. Danese; R. D. Davies; Rebecca Davis; P. de Bernardis; A. de Rosa; G. de Zotti; J. Delabrouille; J. M. Diego; S. Donzelli; O. Doré; X. Dupac; G. Efstathiou; T. A. Enßlin; H. K. Eriksen; F. Finelli; O. Forni; M. Frailis; E. Franceschi; S. Galeotta; K. Ganga; M. Giard; G. Giardino; J. González-Nuevo; K. M. Górski; S. Gratton; A. Gregorio; A. Gruppuso; F. K. Hansen; D. Hanson; D. Harrison; G. Helou; Steen Hildebrandt; E. Hivon; M. Hobson; W. A. Holmes; W. Hovest; K. M. Huffenberger; W. C. Jones; M. Juvela; E. Keihänen; R. Keskitalo; T. S. Kisner; J. Knoche; L. Knox; M. Kunz; H. Kurki-Suonio; A. Lähteenmäki; J. -M. Lamarre; A. Lasenby; C. R. Lawrence; R. Leonardi; A. Lewis; M. Liguori; P. B. Lilje; Michael Linden-Vørnle; M. López-Caniego; P. M. Lubin; J. F. Macías-Pérez; M. Maris; D. J. Marshall; P. G. Martin; E. Martínez-González; S. Masi; S. Matarrese; P. Mazzotta; P. R. Meinhold; A. Melchiorri; L. Mendes; M. Migliaccio; S. Mitra; A. Moneti; L. Montier; G. Morgante; D. Mortlock; A. Moss; D. Munshi; P. Naselsky; F. Nati; P. Natoli; Hans Ulrik Nørgaard-Nielsen; F. Noviello; D. Novikov; Igor Dmitrievich Novikov; S. Osborne; Carol Anne Oxborrow; L. Pagano; F. Pajot; D. Paoletti; F. Pasian; G. Patanchon; O. Perdereau; F. Perrotta; F. Piacentini; E. Pierpaoli; D. Pietrobon; S. Plaszczynski; E. Pointecouteau; G. Polenta; N. Ponthieu; L. Popa; G. W. Pratt; G. Prézeau; J. -L. Puget; J. P. Rachen; W. T. Reach; M. Reinecke; S. Ricciardi; T. Riller; I. Ristorcelli; G. Rocha; C. Rosset; J. A. Rubiño-Martín; B. Rusholme; D. Santos; G. Savini; D. Scott; M. D. Seiffert; E. P. S. Shellard; L. D. Spencer; R. Sunyaev; F. Sureau; A. -S. Suur-Uski; J. -F. Sygnet; J. A. Tauber; D. Tavagnacco; L. Terenzi; L. Toffolatti; M. Tomasi; M. Tristram; M. Tucci; M. Türler; L. Valenziano; J. Valiviita; B. Van Tent; P. Vielva; Frank Villa; N. Vittorio; L. A. Wade; B. D. Wandelt; M. White; D. Yvon; A. Zacchei; J. P. Zibin; A. Zonca

doi:10.1051/0004-6361/201321556

Planck 2013 results. XXVII. Doppler boosting of the CMB: Eppur si muove

Planck Collaboration,, N. Aghanim, C. Armitage-Caplan, M. Arnaud, M. Ashdown, F. Atrio-Barandela, J. Aumont, A. J. Banday, R. B. Barreiro, J. G. Bartlett, K. Benabed, A. Benoit-Lévy, J. -P. Bernard, M. Bersanelli, P. Bielewicz, J. Bobin, Jacob Bock, J. R. Bond, J. Borrill, F. R. BouchetM. Bridges, C. Burigana, Robb Butler, J. F. Cardoso, A. Catalano, A. Challinor, A. Chamballu, Lung-Yih Chiang, H. C. Chiang, P. R. Christensen, D. L. Clements, L. P. L. Colombo, F. Couchot, B. P. Crill, F. Cuttaia, L. Danese, R. D. Davies, Rebecca Davis, P. de Bernardis, A. de Rosa, G. de Zotti, J. Delabrouille, J. M. Diego, S. Donzelli, O. Doré, X. Dupac, G. Efstathiou, T. A. Enßlin, H. K. Eriksen, F. Finelli, O. Forni, M. Frailis, E. Franceschi, S. Galeotta, K. Ganga, M. Giard, G. Giardino, J. González-Nuevo, K. M. Górski, S. Gratton, A. Gregorio, A. Gruppuso, F. K. Hansen, D. Hanson, D. Harrison, G. Helou, Steen Hildebrandt, E. Hivon, M. Hobson, W. A. Holmes, W. Hovest, K. M. Huffenberger, W. C. Jones, M. Juvela, E. Keihänen, R. Keskitalo, T. S. Kisner, J. Knoche, L. Knox, M. Kunz, H. Kurki-Suonio, A. Lähteenmäki, J. -M. Lamarre, A. Lasenby, C. R. Lawrence, R. Leonardi, A. Lewis, M. Liguori, P. B. Lilje, Michael Linden-Vørnle, M. López-Caniego, P. M. Lubin, J. F. Macías-Pérez, M. Maris, D. J. Marshall, P. G. Martin, E. Martínez-González, S. Masi, S. Matarrese, P. Mazzotta, P. R. Meinhold, A. Melchiorri, L. Mendes, M. Migliaccio, S. Mitra, A. Moneti, L. Montier, G. Morgante, D. Mortlock, A. Moss, D. Munshi, P. Naselsky, F. Nati, P. Natoli, Hans Ulrik Nørgaard-Nielsen, F. Noviello, D. Novikov, Igor Dmitrievich Novikov, S. Osborne, Carol Anne Oxborrow, L. Pagano, F. Pajot, D. Paoletti, F. Pasian, G. Patanchon, O. Perdereau, F. Perrotta, F. Piacentini, E. Pierpaoli, D. Pietrobon, S. Plaszczynski, E. Pointecouteau, G. Polenta, N. Ponthieu, L. Popa, G. W. Pratt, G. Prézeau, J. -L. Puget, J. P. Rachen, W. T. Reach, M. Reinecke, S. Ricciardi, T. Riller, I. Ristorcelli, G. Rocha, C. Rosset, J. A. Rubiño-Martín, B. Rusholme, D. Santos, G. Savini, D. Scott, M. D. Seiffert, E. P. S. Shellard, L. D. Spencer, R. Sunyaev, F. Sureau, A. -S. Suur-Uski, J. -F. Sygnet, J. A. Tauber, D. Tavagnacco, L. Terenzi, L. Toffolatti, M. Tomasi, M. Tristram, M. Tucci, M. Türler, L. Valenziano, J. Valiviita, B. Van Tent, P. Vielva, Frank Villa, N. Vittorio, L. A. Wade, B. D. Wandelt, M. White, D. Yvon, A. Zacchei, J. P. Zibin, A. Zonca

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Abstract

Our velocity relative to the rest frame of the cosmic microwave background (CMB) generates a dipole temperature anisotropy on the sky whichhas been well measured for more than 30 years, and has an accepted amplitude of v/c = 1.23 x 10-3, or v = 369 km-1. In addition to thissignal generated by Doppler boosting of the CMB monopole, our motion also modulates and aberrates the CMB temperature fluctuations (as wellas every other source of radiation at cosmological distances). This is an order 10-3 effect applied to fluctuations which are already one part inroughly 105, so it is quite small. Nevertheless, it becomes detectable with the all-sky coverage, high angular resolution, and low noise levels of thePlanck satellite. Here we report a first measurement of this velocity signature using the aberration and modulation eects on the CMB temperatureanisotropies, finding a component in the known dipole direction, (l; b) = (264° 48°), of 384 km s^-1 ± 78 km s^-1 (stat.) ± 115 km s^-1 (syst). This is a significant confirmation of the expected velocity.

Original language	English
Article number	A27
Journal	Astronomy and Astrophysics
Volume	571
Number of pages	11
ISSN	0004-6361
DOIs	https://doi.org/10.1051/0004-6361/201321556
Publication status	Published - 2013

Keywords

Cosmology: observations
Cosmic background radiation
Reference systems
Relativistic processes

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Planck Collaboration,, Aghanim, N., Armitage-Caplan, C., Arnaud, M., Ashdown, M., Atrio-Barandela, F., Aumont, J., Banday, A. J., Barreiro, R. B., Bartlett, J. G., Benabed, K., Benoit-Lévy, A., Bernard, J. .-P., Bersanelli, M., Bielewicz, P., Bobin, J., Bock, J., Bond, J. R., Borrill, J., ... Zonca, A. (2013). Planck 2013 results. XXVII. Doppler boosting of the CMB: Eppur si muove. Astronomy and Astrophysics, 571, Article A27. https://doi.org/10.1051/0004-6361/201321556

@article{ff6397677b4c418f8e121b1d5c523f41,

title = "Planck 2013 results. XXVII. Doppler boosting of the CMB: Eppur si muove",

abstract = "Our velocity relative to the rest frame of the cosmic microwave background (CMB) generates a dipole temperature anisotropy on the sky whichhas been well measured for more than 30 years, and has an accepted amplitude of v/c = 1.23 x 10-3, or v = 369 km-1. In addition to thissignal generated by Doppler boosting of the CMB monopole, our motion also modulates and aberrates the CMB temperature fluctuations (as wellas every other source of radiation at cosmological distances). This is an order 10-3 effect applied to fluctuations which are already one part inroughly 105, so it is quite small. Nevertheless, it becomes detectable with the all-sky coverage, high angular resolution, and low noise levels of thePlanck satellite. Here we report a first measurement of this velocity signature using the aberration and modulation eects on the CMB temperatureanisotropies, finding a component in the known dipole direction, (l; b) = (264° 48°), of 384 km s-1 ± 78 km s-1 (stat.) ± 115 km s-1 (syst). This is a significant confirmation of the expected velocity.",

keywords = "Cosmology: observations, Cosmic background radiation, Reference systems, Relativistic processes",

author = "{Planck Collaboration,} and N. Aghanim and C. Armitage-Caplan and M. Arnaud and M. Ashdown and F. Atrio-Barandela and J. Aumont and Banday, {A. J.} and Barreiro, {R. B.} and Bartlett, {J. G.} and K. Benabed and A. Benoit-L{\'e}vy and Bernard, {J. -P.} and M. Bersanelli and P. Bielewicz and J. Bobin and Jacob Bock and Bond, {J. R.} and J. Borrill and Bouchet, {F. R.} and M. Bridges and C. Burigana and Robb Butler and Cardoso, {J. F.} and A. Catalano and A. Challinor and A. Chamballu and Lung-Yih Chiang and Chiang, {H. C.} and Christensen, {P. R.} and Clements, {D. L.} and Colombo, {L. P. L.} and F. Couchot and Crill, {B. P.} and F. Cuttaia and L. Danese and Davies, {R. D.} and Rebecca Davis and {de Bernardis}, P. and {de Rosa}, A. and {de Zotti}, G. and J. Delabrouille and Diego, {J. M.} and S. Donzelli and O. Dor{\'e} and X. Dupac and G. Efstathiou and En{\ss}lin, {T. A.} and Eriksen, {H. K.} and F. Finelli and O. Forni and M. Frailis and E. Franceschi and S. Galeotta and K. Ganga and M. Giard and G. Giardino and J. Gonz{\'a}lez-Nuevo and G{\'o}rski, {K. M.} and S. Gratton and A. Gregorio and A. Gruppuso and Hansen, {F. K.} and D. Hanson and D. Harrison and G. Helou and Steen Hildebrandt and E. Hivon and M. Hobson and Holmes, {W. A.} and W. Hovest and Huffenberger, {K. M.} and Jones, {W. C.} and M. Juvela and E. Keih{\"a}nen and R. Keskitalo and Kisner, {T. S.} and J. Knoche and L. Knox and M. Kunz and H. Kurki-Suonio and A. L{\"a}hteenm{\"a}ki and Lamarre, {J. -M.} and A. Lasenby and Lawrence, {C. R.} and R. Leonardi and A. Lewis and M. Liguori and Lilje, {P. B.} and Michael Linden-V{\o}rnle and M. L{\'o}pez-Caniego and Lubin, {P. M.} and Mac{\'i}as-P{\'e}rez, {J. F.} and M. Maris and Marshall, {D. J.} and Martin, {P. G.} and E. Mart{\'i}nez-Gonz{\'a}lez and S. Masi and S. Matarrese and P. Mazzotta and Meinhold, {P. R.} and A. Melchiorri and L. Mendes and M. Migliaccio and S. Mitra and A. Moneti and L. Montier and G. Morgante and D. Mortlock and A. Moss and D. Munshi and P. Naselsky and F. Nati and P. Natoli and N{\o}rgaard-Nielsen, {Hans Ulrik} and F. Noviello and D. Novikov and Novikov, {Igor Dmitrievich} and S. Osborne and Oxborrow, {Carol Anne} and L. Pagano and F. Pajot and D. Paoletti and F. Pasian and G. Patanchon and O. Perdereau and F. Perrotta and F. Piacentini and E. Pierpaoli and D. Pietrobon and S. Plaszczynski and E. Pointecouteau and G. Polenta and N. Ponthieu and L. Popa and Pratt, {G. W.} and G. Pr{\'e}zeau and Puget, {J. -L.} and Rachen, {J. P.} and Reach, {W. T.} and M. Reinecke and S. Ricciardi and T. Riller and I. Ristorcelli and G. Rocha and C. Rosset and Rubi{\~n}o-Mart{\'i}n, {J. A.} and B. Rusholme and D. Santos and G. Savini and D. Scott and Seiffert, {M. D.} and Shellard, {E. P. S.} and Spencer, {L. D.} and R. Sunyaev and F. Sureau and Suur-Uski, {A. -S.} and Sygnet, {J. -F.} and Tauber, {J. A.} and D. Tavagnacco and L. Terenzi and L. Toffolatti and M. Tomasi and M. Tristram and M. Tucci and M. T{\"u}rler and L. Valenziano and J. Valiviita and {Van Tent}, B. and P. Vielva and Frank Villa and N. Vittorio and Wade, {L. A.} and Wandelt, {B. D.} and M. White and D. Yvon and A. Zacchei and Zibin, {J. P.} and A. Zonca",

year = "2013",

doi = "10.1051/0004-6361/201321556",

language = "English",

volume = "571",

journal = "Astronomy and Astrophysics",

issn = "0004-6361",

publisher = "EDP Sciences",

}

Planck Collaboration, Aghanim, N, Armitage-Caplan, C, Arnaud, M, Ashdown, M, Atrio-Barandela, F, Aumont, J, Banday, AJ, Barreiro, RB, Bartlett, JG, Benabed, K, Benoit-Lévy, A, Bernard, J-P, Bersanelli, M, Bielewicz, P, Bobin, J, Bock, J, Bond, JR, Borrill, J, Bouchet, FR, Bridges, M, Burigana, C, Butler, R, Cardoso, JF, Catalano, A, Challinor, A, Chamballu, A, Chiang, L-Y, Chiang, HC, Christensen, PR, Clements, DL, Colombo, LPL, Couchot, F, Crill, BP, Cuttaia, F, Danese, L, Davies, RD, Davis, R, de Bernardis, P, de Rosa, A, de Zotti, G, Delabrouille, J, Diego, JM, Donzelli, S, Doré, O, Dupac, X, Efstathiou, G, Enßlin, TA, Eriksen, HK, Finelli, F, Forni, O, Frailis, M, Franceschi, E, Galeotta, S, Ganga, K, Giard, M, Giardino, G, González-Nuevo, J, Górski, KM, Gratton, S, Gregorio, A, Gruppuso, A, Hansen, FK, Hanson, D, Harrison, D, Helou, G, Hildebrandt, S, Hivon, E, Hobson, M, Holmes, WA, Hovest, W, Huffenberger, KM, Jones, WC, Juvela, M, Keihänen, E, Keskitalo, R, Kisner, TS, Knoche, J, Knox, L, Kunz, M, Kurki-Suonio, H, Lähteenmäki, A, Lamarre, J-M, Lasenby, A, Lawrence, CR, Leonardi, R, Lewis, A, Liguori, M, Lilje, PB, Linden-Vørnle, M, López-Caniego, M, Lubin, PM, Macías-Pérez, JF, Maris, M, Marshall, DJ, Martin, PG, Martínez-González, E, Masi, S, Matarrese, S, Mazzotta, P, Meinhold, PR, Melchiorri, A, Mendes, L, Migliaccio, M, Mitra, S, Moneti, A, Montier, L, Morgante, G, Mortlock, D, Moss, A, Munshi, D, Naselsky, P, Nati, F, Natoli, P, Nørgaard-Nielsen, HU, Noviello, F, Novikov, D, Novikov, ID, Osborne, S, Oxborrow, CA, Pagano, L, Pajot, F, Paoletti, D, Pasian, F, Patanchon, G, Perdereau, O, Perrotta, F, Piacentini, F, Pierpaoli, E, Pietrobon, D, Plaszczynski, S, Pointecouteau, E, Polenta, G, Ponthieu, N, Popa, L, Pratt, GW, Prézeau, G, Puget, J-L, Rachen, JP, Reach, WT, Reinecke, M, Ricciardi, S, Riller, T, Ristorcelli, I, Rocha, G, Rosset, C, Rubiño-Martín, JA, Rusholme, B, Santos, D, Savini, G, Scott, D, Seiffert, MD, Shellard, EPS, Spencer, LD, Sunyaev, R, Sureau, F, Suur-Uski, A-S, Sygnet, J-F, Tauber, JA, Tavagnacco, D, Terenzi, L, Toffolatti, L, Tomasi, M, Tristram, M, Tucci, M, Türler, M, Valenziano, L, Valiviita, J, Van Tent, B, Vielva, P, Villa, F, Vittorio, N, Wade, LA, Wandelt, BD, White, M, Yvon, D, Zacchei, A, Zibin, JP & Zonca, A 2013, 'Planck 2013 results. XXVII. Doppler boosting of the CMB: Eppur si muove', Astronomy and Astrophysics, vol. 571, A27. https://doi.org/10.1051/0004-6361/201321556

TY - JOUR

T1 - Planck 2013 results. XXVII. Doppler boosting of the CMB: Eppur si muove

AU - Planck Collaboration,,

AU - Aghanim, N.

AU - Armitage-Caplan, C.

AU - Arnaud, M.

AU - Ashdown, M.

AU - Atrio-Barandela, F.

AU - Aumont, J.

AU - Banday, A. J.

AU - Barreiro, R. B.

AU - Bartlett, J. G.

AU - Benabed, K.

AU - Benoit-Lévy, A.

AU - Bernard, J. -P.

AU - Bersanelli, M.

AU - Bielewicz, P.

AU - Bobin, J.

AU - Bock, Jacob

AU - Bond, J. R.

AU - Borrill, J.

AU - Bouchet, F. R.

AU - Bridges, M.

AU - Burigana, C.

AU - Butler, Robb

AU - Cardoso, J. F.

AU - Catalano, A.

AU - Challinor, A.

AU - Chamballu, A.

AU - Chiang, Lung-Yih

AU - Chiang, H. C.

AU - Christensen, P. R.

AU - Clements, D. L.

AU - Colombo, L. P. L.

AU - Couchot, F.

AU - Crill, B. P.

AU - Cuttaia, F.

AU - Danese, L.

AU - Davies, R. D.

AU - Davis, Rebecca

AU - de Bernardis, P.

AU - de Rosa, A.

AU - de Zotti, G.

AU - Delabrouille, J.

AU - Diego, J. M.

AU - Donzelli, S.

AU - Doré, O.

AU - Dupac, X.

AU - Efstathiou, G.

AU - Enßlin, T. A.

AU - Eriksen, H. K.

AU - Finelli, F.

AU - Forni, O.

AU - Frailis, M.

AU - Franceschi, E.

AU - Galeotta, S.

AU - Ganga, K.

AU - Giard, M.

AU - Giardino, G.

AU - González-Nuevo, J.

AU - Górski, K. M.

AU - Gratton, S.

AU - Gregorio, A.

AU - Gruppuso, A.

AU - Hansen, F. K.

AU - Hanson, D.

AU - Harrison, D.

AU - Helou, G.

AU - Hildebrandt, Steen

AU - Hivon, E.

AU - Hobson, M.

AU - Holmes, W. A.

AU - Hovest, W.

AU - Huffenberger, K. M.

AU - Jones, W. C.

AU - Juvela, M.

AU - Keihänen, E.

AU - Keskitalo, R.

AU - Kisner, T. S.

AU - Knoche, J.

AU - Knox, L.

AU - Kunz, M.

AU - Kurki-Suonio, H.

AU - Lähteenmäki, A.

AU - Lamarre, J. -M.

AU - Lasenby, A.

AU - Lawrence, C. R.

AU - Leonardi, R.

AU - Lewis, A.

AU - Liguori, M.

AU - Lilje, P. B.

AU - Linden-Vørnle, Michael

AU - López-Caniego, M.

AU - Lubin, P. M.

AU - Macías-Pérez, J. F.

AU - Maris, M.

AU - Marshall, D. J.

AU - Martin, P. G.

AU - Martínez-González, E.

AU - Masi, S.

AU - Matarrese, S.

AU - Mazzotta, P.

AU - Meinhold, P. R.

AU - Melchiorri, A.

AU - Mendes, L.

AU - Migliaccio, M.

AU - Mitra, S.

AU - Moneti, A.

AU - Montier, L.

AU - Morgante, G.

AU - Mortlock, D.

AU - Moss, A.

AU - Munshi, D.

AU - Naselsky, P.

AU - Nati, F.

AU - Natoli, P.

AU - Nørgaard-Nielsen, Hans Ulrik

AU - Noviello, F.

AU - Novikov, D.

AU - Novikov, Igor Dmitrievich

AU - Osborne, S.

AU - Oxborrow, Carol Anne

AU - Pagano, L.

AU - Pajot, F.

AU - Paoletti, D.

AU - Pasian, F.

AU - Patanchon, G.

AU - Perdereau, O.

AU - Perrotta, F.

AU - Piacentini, F.

AU - Pierpaoli, E.

AU - Pietrobon, D.

AU - Plaszczynski, S.

AU - Pointecouteau, E.

AU - Polenta, G.

AU - Ponthieu, N.

AU - Popa, L.

AU - Pratt, G. W.

AU - Prézeau, G.

AU - Puget, J. -L.

AU - Rachen, J. P.

AU - Reach, W. T.

AU - Reinecke, M.

AU - Ricciardi, S.

AU - Riller, T.

AU - Ristorcelli, I.

AU - Rocha, G.

AU - Rosset, C.

AU - Rubiño-Martín, J. A.

AU - Rusholme, B.

AU - Santos, D.

AU - Savini, G.

AU - Scott, D.

AU - Seiffert, M. D.

AU - Shellard, E. P. S.

AU - Spencer, L. D.

AU - Sunyaev, R.

AU - Sureau, F.

AU - Suur-Uski, A. -S.

AU - Sygnet, J. -F.

AU - Tauber, J. A.

AU - Tavagnacco, D.

AU - Terenzi, L.

AU - Toffolatti, L.

AU - Tomasi, M.

AU - Tristram, M.

AU - Tucci, M.

AU - Türler, M.

AU - Valenziano, L.

AU - Valiviita, J.

AU - Van Tent, B.

AU - Vielva, P.

AU - Villa, Frank

AU - Vittorio, N.

AU - Wade, L. A.

AU - Wandelt, B. D.

AU - White, M.

AU - Yvon, D.

AU - Zacchei, A.

AU - Zibin, J. P.

AU - Zonca, A.

PY - 2013

Y1 - 2013

N2 - Our velocity relative to the rest frame of the cosmic microwave background (CMB) generates a dipole temperature anisotropy on the sky whichhas been well measured for more than 30 years, and has an accepted amplitude of v/c = 1.23 x 10-3, or v = 369 km-1. In addition to thissignal generated by Doppler boosting of the CMB monopole, our motion also modulates and aberrates the CMB temperature fluctuations (as wellas every other source of radiation at cosmological distances). This is an order 10-3 effect applied to fluctuations which are already one part inroughly 105, so it is quite small. Nevertheless, it becomes detectable with the all-sky coverage, high angular resolution, and low noise levels of thePlanck satellite. Here we report a first measurement of this velocity signature using the aberration and modulation eects on the CMB temperatureanisotropies, finding a component in the known dipole direction, (l; b) = (264° 48°), of 384 km s-1 ± 78 km s-1 (stat.) ± 115 km s-1 (syst). This is a significant confirmation of the expected velocity.

AB - Our velocity relative to the rest frame of the cosmic microwave background (CMB) generates a dipole temperature anisotropy on the sky whichhas been well measured for more than 30 years, and has an accepted amplitude of v/c = 1.23 x 10-3, or v = 369 km-1. In addition to thissignal generated by Doppler boosting of the CMB monopole, our motion also modulates and aberrates the CMB temperature fluctuations (as wellas every other source of radiation at cosmological distances). This is an order 10-3 effect applied to fluctuations which are already one part inroughly 105, so it is quite small. Nevertheless, it becomes detectable with the all-sky coverage, high angular resolution, and low noise levels of thePlanck satellite. Here we report a first measurement of this velocity signature using the aberration and modulation eects on the CMB temperatureanisotropies, finding a component in the known dipole direction, (l; b) = (264° 48°), of 384 km s-1 ± 78 km s-1 (stat.) ± 115 km s-1 (syst). This is a significant confirmation of the expected velocity.

KW - Cosmology: observations

KW - Cosmic background radiation

KW - Reference systems

KW - Relativistic processes

U2 - 10.1051/0004-6361/201321556

DO - 10.1051/0004-6361/201321556

M3 - Journal article

SN - 0004-6361

VL - 571

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

M1 - A27

ER -

Planck 2013 results. XXVII. Doppler boosting of the CMB: Eppur si muove

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