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

N. Aghanim; C. Armitage-Caplan; M. Arnaud; M. Ashdown; F. Atrio-Barandela; J. Aumont; C. Baccigalupi; A. J. Banday; R. B. Barreiro; J. G. Bartlett; K. Benabed; A. Benoit-Lévy; J. P. Bernard; M. Bersanelli; P. Bielewicz; J. Bobin; J. J. Bock; J. R. Bond; J. Borrill; F. R. Bouchet; M. Bridges; C. Burigana; R. C. Butler; J. F. Cardoso; A. Catalano; A. Challinor; A. Chamballu; H. C. Chiang; L. Y. Chiang; P. R. Christensen; D. L. Clements; L. P.L. Colombo; F. Couchot; B. P. Crill; A. Curto; F. Cuttaia; L. Danese; R. D. Davies; R. J. 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. L. Harrison; G. Helou; S. R. 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; R. J. Laureijs; C. R. Lawrence; R. Leonardi; A. Lewis; M. Liguori; P. B. Lilje; M. Linden-Vørnle; M. López-Caniego; P. M. Lubin; J. F. Maciás-Pérez; N. Mandolesi; M. Maris; D. J. Marshall; P. G. Martin; E. Martínez-González; S. Masi; M. Massardi; 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; H. U. Nørgaard-Nielsen; F. Noviello; D. Novikov; I. Novikov; S. Osborne; C. A. 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. Rubinõ-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; F. 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

N. Aghanim, C. Armitage-Caplan, M. Arnaud, M. Ashdown, F. Atrio-Barandela, J. Aumont, C. Baccigalupi, A. J. Banday, R. B. Barreiro, J. G. Bartlett, K. Benabed, A. Benoit-Lévy, J. P. Bernard, M. Bersanelli, P. Bielewicz, J. Bobin, J. J. Bock, J. R. Bond, J. Borrill, F. R. BouchetM. Bridges, C. Burigana, R. C. Butler, J. F. Cardoso, A. Catalano, A. Challinor, A. Chamballu, H. C. Chiang, L. Y. Chiang, P. R. Christensen, D. L. Clements, L. P.L. Colombo, F. Couchot, B. P. Crill, A. Curto, F. Cuttaia, L. Danese, R. D. Davies, R. J. 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. L. Harrison, G. Helou, S. R. 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, R. J. Laureijs, C. R. Lawrence, R. Leonardi, A. Lewis, M. Liguori, P. B. Lilje, M. Linden-Vørnle, M. López-Caniego, P. M. Lubin, J. F. Maciás-Pérez, N. Mandolesi, M. Maris, D. J. Marshall, P. G. Martin, E. Martínez-González, S. Masi, M. Massardi, 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, H. U. Nørgaard-Nielsen, F. Noviello, D. Novikov, I. Novikov, S. Osborne, C. A. 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. Rubinõ-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, F. Villa, N. Vittorio, L. A. Wade, B. D. Wandelt, M. White, D. Yvon, A. Zacchei, J. P. Zibin, A. Zonca

Physics

Research output: Contribution to journal › Article › peer-review

119 Scopus citations

Abstract

Our velocity relative to the rest frame of the cosmic microwave background (CMB) generates a dipole temperature anisotropy on the sky which has been well measured for more than 30 years, and has an accepted amplitude of v/c = 1.23 × 10^-3, or v = 369. In addition to this signal generated by Doppler boosting of the CMB monopole, our motion also modulates and aberrates the CMB temperature fluctuations (as well as every other source of radiation at cosmological distances). This is an order 10^-3 effect applied to fluctuations which are already one part in roughly 10⁵, so it is quite small. Nevertheless, it becomes detectable with the all-sky coverage, high angular resolution, and low noise levels of the Planck satellite. Here we report a first measurement of this velocity signature using the aberration and modulation effects on the CMB temperature anisotropies, 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 (US)
Article number	A27
Journal	Astronomy and Astrophysics
Volume	571
DOIs	https://doi.org/10.1051/0004-6361/201321556
State	Published - Nov 1 2014

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

Keywords

Cosmic background radiation
Cosmology: observations
Reference systems
Relativistic processes

Access to Document

10.1051/0004-6361/201321556

Cite this

Aghanim, N., Armitage-Caplan, C., Arnaud, M., Ashdown, M., Atrio-Barandela, F., Aumont, J., Baccigalupi, C., 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. J., Bond, J. R., Borrill, J., ... Zonca, A. (2014). 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{1487803fc45143e3ab4615de6260e058,

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 which has been well measured for more than 30 years, and has an accepted amplitude of v/c = 1.23 × 10-3, or v = 369. In addition to this signal generated by Doppler boosting of the CMB monopole, our motion also modulates and aberrates the CMB temperature fluctuations (as well as every other source of radiation at cosmological distances). This is an order 10-3 effect applied to fluctuations which are already one part in roughly 105, so it is quite small. Nevertheless, it becomes detectable with the all-sky coverage, high angular resolution, and low noise levels of the Planck satellite. Here we report a first measurement of this velocity signature using the aberration and modulation effects on the CMB temperature anisotropies, 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 = "Cosmic background radiation, Cosmology: observations, Reference systems, Relativistic processes",

author = "N. Aghanim and C. Armitage-Caplan and M. Arnaud and M. Ashdown and F. Atrio-Barandela and J. Aumont and C. Baccigalupi 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 Bock, {J. J.} and Bond, {J. R.} and J. Borrill and Bouchet, {F. R.} and M. Bridges and C. Burigana and Butler, {R. C.} and Cardoso, {J. F.} and A. Catalano and A. Challinor and A. Chamballu and Chiang, {H. C.} and Chiang, {L. Y.} and Christensen, {P. R.} and Clements, {D. L.} and Colombo, {L. P.L.} and F. Couchot and Crill, {B. P.} and A. Curto and F. Cuttaia and L. Danese and Davies, {R. D.} and Davis, {R. J.} 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 Harrison, {D. L.} and G. Helou and Hildebrandt, {S. R.} 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 Laureijs, {R. J.} and Lawrence, {C. R.} and R. Leonardi and A. Lewis and M. Liguori and Lilje, {P. B.} and M. Linden-V{\o}rnle and M. L{\'o}pez-Caniego and Lubin, {P. M.} and Maci{\'a}s-P{\'e}rez, {J. F.} and N. Mandolesi and M. Maris and Marshall, {D. J.} and Martin, {P. G.} and E. Mart{\'i}nez-Gonz{\'a}lez and S. Masi and M. Massardi 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, {H. U.} and F. Noviello and D. Novikov and I. Novikov and S. Osborne and Oxborrow, {C. A.} 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 Rubin{\~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 F. 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",

note = "Publisher Copyright: {\textcopyright} 2014 ESO.",

year = "2014",

month = nov,

day = "1",

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

language = "English (US)",

volume = "571",

journal = "Astronomy and Astrophysics",

issn = "0004-6361",

publisher = "EDP Sciences",

}

Aghanim, N, Armitage-Caplan, C, Arnaud, M, Ashdown, M, Atrio-Barandela, F, Aumont, J, Baccigalupi, C, Banday, AJ, Barreiro, RB, Bartlett, JG, Benabed, K, Benoit-Lévy, A, Bernard, JP, Bersanelli, M, Bielewicz, P, Bobin, J, Bock, JJ, Bond, JR, Borrill, J, Bouchet, FR, Bridges, M, Burigana, C, Butler, RC, Cardoso, JF, Catalano, A, Challinor, A, Chamballu, A, Chiang, HC, Chiang, LY, Christensen, PR, Clements, DL, Colombo, LPL, Couchot, F, Crill, BP, Curto, A, Cuttaia, F, Danese, L, Davies, RD, Davis, RJ, 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, DL, Helou, G, Hildebrandt, SR, 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, JM, Lasenby, A, Laureijs, RJ, Lawrence, CR, Leonardi, R, Lewis, A, Liguori, M, Lilje, PB, Linden-Vørnle, M, López-Caniego, M, Lubin, PM, Maciás-Pérez, JF, Mandolesi, N, Maris, M, Marshall, DJ, Martin, PG, Martínez-González, E, Masi, S, Massardi, M, 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, I, 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, JL, Rachen, JP, Reach, WT, Reinecke, M, Ricciardi, S, Riller, T, Ristorcelli, I, Rocha, G, Rosset, C, Rubinõ-Martín, JA, Rusholme, B, Santos, D, Savini, G, Scott, D, Seiffert, MD, Shellard, EPS, Spencer, LD, Sunyaev, R, Sureau, F, Suur-Uski, AS, Sygnet, JF, 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 2014, '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

T2 - Eppur si muove

AU - Aghanim, N.

AU - Armitage-Caplan, C.

AU - Arnaud, M.

AU - Ashdown, M.

AU - Atrio-Barandela, F.

AU - Aumont, J.

AU - Baccigalupi, C.

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, J. J.

AU - Bond, J. R.

AU - Borrill, J.

AU - Bouchet, F. R.

AU - Bridges, M.

AU - Burigana, C.

AU - Butler, R. C.

AU - Cardoso, J. F.

AU - Catalano, A.

AU - Challinor, A.

AU - Chamballu, A.

AU - Chiang, H. C.

AU - Chiang, L. Y.

AU - Christensen, P. R.

AU - Clements, D. L.

AU - Colombo, L. P.L.

AU - Couchot, F.

AU - Crill, B. P.

AU - Curto, A.

AU - Cuttaia, F.

AU - Danese, L.

AU - Davies, R. D.

AU - Davis, R. J.

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. L.

AU - Helou, G.

AU - Hildebrandt, S. R.

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 - Laureijs, R. J.

AU - Lawrence, C. R.

AU - Leonardi, R.

AU - Lewis, A.

AU - Liguori, M.

AU - Lilje, P. B.

AU - Linden-Vørnle, M.

AU - López-Caniego, M.

AU - Lubin, P. M.

AU - Maciás-Pérez, J. F.

AU - Mandolesi, N.

AU - Maris, M.

AU - Marshall, D. J.

AU - Martin, P. G.

AU - Martínez-González, E.

AU - Masi, S.

AU - Massardi, M.

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, H. U.

AU - Noviello, F.

AU - Novikov, D.

AU - Novikov, I.

AU - Osborne, S.

AU - Oxborrow, C. A.

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 - Rubinõ-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, F.

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 - 2014/11/1

Y1 - 2014/11/1

N2 - Our velocity relative to the rest frame of the cosmic microwave background (CMB) generates a dipole temperature anisotropy on the sky which has been well measured for more than 30 years, and has an accepted amplitude of v/c = 1.23 × 10-3, or v = 369. In addition to this signal generated by Doppler boosting of the CMB monopole, our motion also modulates and aberrates the CMB temperature fluctuations (as well as every other source of radiation at cosmological distances). This is an order 10-3 effect applied to fluctuations which are already one part in roughly 105, so it is quite small. Nevertheless, it becomes detectable with the all-sky coverage, high angular resolution, and low noise levels of the Planck satellite. Here we report a first measurement of this velocity signature using the aberration and modulation effects on the CMB temperature anisotropies, 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 which has been well measured for more than 30 years, and has an accepted amplitude of v/c = 1.23 × 10-3, or v = 369. In addition to this signal generated by Doppler boosting of the CMB monopole, our motion also modulates and aberrates the CMB temperature fluctuations (as well as every other source of radiation at cosmological distances). This is an order 10-3 effect applied to fluctuations which are already one part in roughly 105, so it is quite small. Nevertheless, it becomes detectable with the all-sky coverage, high angular resolution, and low noise levels of the Planck satellite. Here we report a first measurement of this velocity signature using the aberration and modulation effects on the CMB temperature anisotropies, 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 - Cosmic background radiation

KW - Cosmology: observations

KW - Reference systems

KW - Relativistic processes

UR - http://www.scopus.com/inward/record.url?scp=84908703173&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84908703173&partnerID=8YFLogxK

U2 - 10.1051/0004-6361/201321556

DO - 10.1051/0004-6361/201321556

M3 - Article

AN - SCOPUS:84908703173

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

Abstract

All Science Journal Classification (ASJC) codes

Keywords

Access to Document

Other files and links

Fingerprint

Cite this