POLARBEAR is a Cosmic Microwave Background radiation (CMB) polarization experiment that is located in the Atacama Desert in Chile. The scientific goals of the experiment are to characterize the B-mode signal from gravitational lensing, as well as to search for B-mode signals created by primordial gravitational waves (PGWs). Polarbear started observations in 2012 and has published a series of results. These include the first measurement of a nonzero B-mode angular auto-power spectrum at sub-degree scales where the dominant signal is gravitational lensing of the CMB. In addition, we have achieved the first measurement of crosscorrelation between the lensing potential, which was reconstructed from the CMB polarization data alone by Polarbear, and the cosmic shear field from galaxy shapes by the Subaru Hyper Suprime-Cam (HSC) survey. In 2014, we installed a continuously rotating half-wave plate (CRHWP) at the focus of the primary mirror to search for PGWs and demonstrated the control of low-frequency noise. We have found that the low-frequency B-mode power in the combined dataset with the Planck high-frequency maps is consistent with Galactic dust foreground, thus placing an upper limit on the tensor-to-scalar ratio of r < 0.90 at the 95% confidence level after marginalizing over the foregrounds.

Results of gravitational lensing and primordial gravitational waves from the POLARBEAR experiment / Chinone, Y.; Adachi, S.; Ade, P. A. R.; Aguilar, M.; Akiba, Y.; Arnold, K.; Baccigalupi, C.; Barron, D.; Beck, D.; Beckman, S.; Bianchini, F.; Boettger, D.; Borrill, J.; Elbouhargani, H.; Carron, J.; Chapman, S.; Cheung, K.; Crowley, K.; Cukierman, A.; Dunner, R.; Dobbs, M.; Ducout, A.; Elleflot, T.; Errard, J.; Fabbian, G.; Feeney, S. M.; Feng, C.; Fujino, T.; Galitzki, N.; Gilbert, A.; Goeckner-Wald, N.; Groh, J.; Groh, J. C.; Hall, G.; Halverson, N.; Hamada, T.; Hasegawa, M.; Hazumi, M.; Hill, C. A.; Howe, L.; Inoue, Y.; Jaehnig, G.; Jaffe, A. H.; Jeong, O.; Lejeune, M.; Kaneko, D.; Katayama, N.; Keating, B.; Keskitalo, R.; Kikuchi, S.; Kisner, T.; Krachmalnicoff, N.; Kusaka, A.; Lee, A. T.; Leitch, E. M.; Leon, D.; Linder, E.; Lowry, L. N.; Mangu, A.; Matsuda, F.; Matsumura, T.; Minami, Y.; Montgomery, J.; Navaroli, M.; Nishino, H.; Paar, H.; Peloton, J.; Pham, A. T. P.; Poletti, D.; Puglisi, G.; Reichardt, C. L.; Richards, P. L.; Ross, C.; Segawa, Y.; Sherwin, B. D.; Silva-Feaver, M.; Siritanasak, P.; Stebor, N.; Stompor, R.; Suzuki, A.; Tajima, O.; Takakura, S.; Takatori, S.; Tanabe, D.; Teply, G. P.; Tomaru, T.; Tsai, C.; Tucker, C.; Verges, C.; Westbrook, B.; Whitehorn, N.; Zahn, A.; Zhou, Y.. - In: JOURNAL OF PHYSICS. CONFERENCE SERIES. - ISSN 1742-6588. - 1468:(2020), pp. 1-4. ((Intervento presentato al convegno 16th International Conference on Topics in Astroparticle and Underground Physics, TAUP 2019 tenutosi a Toyama, JAPAN nel SEP 09-13, 2019 [10.1088/1742-6596/1468/1/012007].

Results of gravitational lensing and primordial gravitational waves from the POLARBEAR experiment

Arnold K.;Baccigalupi C.;Bianchini F.;Borrill J.;Fabbian G.;Keating B.;Krachmalnicoff N.;Poletti D.;Puglisi G.;Silva-Feaver M.;Stompor R.;Zhou Y.
2020

Abstract

POLARBEAR is a Cosmic Microwave Background radiation (CMB) polarization experiment that is located in the Atacama Desert in Chile. The scientific goals of the experiment are to characterize the B-mode signal from gravitational lensing, as well as to search for B-mode signals created by primordial gravitational waves (PGWs). Polarbear started observations in 2012 and has published a series of results. These include the first measurement of a nonzero B-mode angular auto-power spectrum at sub-degree scales where the dominant signal is gravitational lensing of the CMB. In addition, we have achieved the first measurement of crosscorrelation between the lensing potential, which was reconstructed from the CMB polarization data alone by Polarbear, and the cosmic shear field from galaxy shapes by the Subaru Hyper Suprime-Cam (HSC) survey. In 2014, we installed a continuously rotating half-wave plate (CRHWP) at the focus of the primary mirror to search for PGWs and demonstrated the control of low-frequency noise. We have found that the low-frequency B-mode power in the combined dataset with the Planck high-frequency maps is consistent with Galactic dust foreground, thus placing an upper limit on the tensor-to-scalar ratio of r < 0.90 at the 95% confidence level after marginalizing over the foregrounds.
Journal of Physics: Conference Series
1468
1
4
10.1088/1742-6596/1468/1/012007
https://iopscience.iop.org/article/10.1088/1742-6596/1468/1/012007
Institute of Physics Publishing
Chinone, Y.; Adachi, S.; Ade, P. A. R.; Aguilar, M.; Akiba, Y.; Arnold, K.; Baccigalupi, C.; Barron, D.; Beck, D.; Beckman, S.; Bianchini, F.; Boettger, D.; Borrill, J.; Elbouhargani, H.; Carron, J.; Chapman, S.; Cheung, K.; Crowley, K.; Cukierman, A.; Dunner, R.; Dobbs, M.; Ducout, A.; Elleflot, T.; Errard, J.; Fabbian, G.; Feeney, S. M.; Feng, C.; Fujino, T.; Galitzki, N.; Gilbert, A.; Goeckner-Wald, N.; Groh, J.; Groh, J. C.; Hall, G.; Halverson, N.; Hamada, T.; Hasegawa, M.; Hazumi, M.; Hill, C. A.; Howe, L.; Inoue, Y.; Jaehnig, G.; Jaffe, A. H.; Jeong, O.; Lejeune, M.; Kaneko, D.; Katayama, N.; Keating, B.; Keskitalo, R.; Kikuchi, S.; Kisner, T.; Krachmalnicoff, N.; Kusaka, A.; Lee, A. T.; Leitch, E. M.; Leon, D.; Linder, E.; Lowry, L. N.; Mangu, A.; Matsuda, F.; Matsumura, T.; Minami, Y.; Montgomery, J.; Navaroli, M.; Nishino, H.; Paar, H.; Peloton, J.; Pham, A. T. P.; Poletti, D.; Puglisi, G.; Reichardt, C. L.; Richards, P. L.; Ross, C.; Segawa, Y.; Sherwin, B. D.; Silva-Feaver, M.; Siritanasak, P.; Stebor, N.; Stompor, R.; Suzuki, A.; Tajima, O.; Takakura, S.; Takatori, S.; Tanabe, D.; Teply, G. P.; Tomaru, T.; Tsai, C.; Tucker, C.; Verges, C.; Westbrook, B.; Whitehorn, N.; Zahn, A.; Zhou, Y.
File in questo prodotto:
File Dimensione Formato  
Chinone_2020_J._Phys. _Conf._Ser._1468_012007.pdf

accesso aperto

Tipologia: Versione Editoriale (PDF)
Licenza: Creative commons
Dimensione 841.04 kB
Formato Adobe PDF
841.04 kB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.11767/114991
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 0
  • ???jsp.display-item.citation.isi??? 0
social impact