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Abstract:

We propose a method for a numerical computation of the angular bispectrum of the cosmic microwave background (CMB) anisotropies arising from active models such as cosmic topological defects, using a modified Boltzmann code based on CMBFAST. The method does not use CMB sky maps and requires moderate computational power. As a first implementation, we apply our method to a recently proposed model of simulated cosmic strings and estimate the observability of the non-Gaussian bispectrum signal. A comparison with the cosmic variance of the bispectrum estimator shows that the bispectrum for the simulated string model we used is not observable. © 2001 The American Physical Society.

Registro:

Documento: Artículo
Título:Cosmic microwave background bispectrum from active models of structure formation
Autor:Gangui, A.; Pogosian, L.; Winitzki, S.
Filiación:Instituto de Astronomía y Física del Espacio, Ciudad Universitaria, 1428 Buenos Aires, Argentina
Departamento de Física, Universidad de Buenos Aires, Pab. 1, 1428 Buenos Aires, Argentina
Physics Department, Case Western Reserve University, Cleveland, OH 44106-7079, United States
Palabras clave:anisotropy; article; astronomy; calculation; methodology; model; physics; signal detection
Año:2001
Volumen:64
Número:4
DOI: http://dx.doi.org/10.1103/PhysRevD.64.043001
Título revista:Physical Review D
ISSN:05562821
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_05562821_v64_n4_p_Gangui

Referencias:

  • De Bernardis, P., (2000) Nature (London), 404, p. 995. , C.B. Netterfield et al., astro-ph/0104460
  • Jaffe, A.H., (2001) Phys. Rev. Lett., 86, p. 3475. , A.T. Lee, et al., astro-ph/0104459
  • N.W. Halverson et al., astro-ph/0104489; Magueijo, J., Albrecht, A., Ferreira, P., Coulson, D., (1996) Phys. Rev. D, 54, p. 3727
  • Gangui, A., Lucchin, F., Matarrese, S., Mollerach, S., (1994) Astrophys. J., 430, p. 447
  • Vilenkin, A., Shellard, E.P.S., (2000) Cosmic Strings and Other Topological Defects, 2nd Ed., , Cambridge University Press, Cambridge, England
  • Gangui, A., (2001) Science, 291, p. 837
  • Avelino, P.P., Martins, C.J.A.P., (2000) Phys. Rev. Lett., 85, p. 1370
  • Contaldi, C., Hindmarsh, M., Magueijo, J., (1999) Phys. Rev. Lett., 82, p. 2034
  • Battye, R., Weller, J., (2000) Phys. Rev. D, 61, p. 043501. , F.R. Bouchet, P. Peter, A. Riazuelo, and M. Sakellariadou, astro-ph/0005022
  • Luo, X., (1994) Astrophys. J. Lett., 427, pp. L71
  • Heavens, A.F., (1998) Mon. Not. R. Astron. Soc., 299, p. 805
  • Spergel, D., Goldberg, D., (1999) Phys. Rev. D, 59, p. 103001
  • Goldberg, D., Spergel, D., (1999) Phys. Rev. D, 59, p. 103002
  • Magueijo, J., (2000) Astrophys. J. Lett., 528, pp. L57
  • Verde, L., Wang, L., Heavens, A.F., Kamionkowski, M., (2000) Mon. Not. R. Astron. Soc., 313, pp. L141
  • Cooray, A., Hu, W., (2000) Astrophys. J., 534, p. 533
  • Gangui, A., Martin, J., (2000) Mon. Not. R. Astron. Soc., 313, p. 323
  • Seljak, U., Zaldarriaga, M., (1996) Astrophys. J., 469, p. 437
  • Albrecht, A., Battye, R., Robinson, J., (1997) Phys. Rev. Lett., 79, p. 4736
  • (1999) Phys. Rev. D, 59, p. 023508
  • Pogosian, L., Vachaspati, T., (1999) Phys. Rev. D, 60, p. 083504. , L. Pogosian, astro-ph/0009307
  • Komatsu, E., Spergel, D., (2001) Phys. Rev. D, 63, p. 063002
  • Wang, L., Kamionkowski, M., (2000) Phys. Rev. D, 61, p. 063504
  • Gangui, A., Martin, J., (2000) Phys. Rev. D, 62, p. 103004
  • Scaramella, R., Vittorio, N., (1991) Astrophys. J., 375, p. 439
  • Srednicki, M., (1993) Astrophys. J. Lett., 416, pp. LI
  • Martins, C.J.A.P., Shellard, E.P.S., (1996) Phys. Rev. D, 54, p. 2535
  • Turok, N., Pen, U.-L., Seljak, U., (1998) Phys. Rev. D, 58, p. 023506
  • Durrer, R., Gangui, A., Sakellariadou, M., (1996) Phys. Rev. Lett., 76, p. 579
  • Avelino, P.P., Shellard, E.P.S., Wu, J.H.P., Allen, B., (1998) Astrophys. J. Lett., 507, pp. L101
  • Martins, C.J.A.P., private communication; J.-H.P. Wu et al., astro-ph/9812156; Kaiser, N., Stebbins, A., (1984) Nature (London), 310, p. 391
  • Benabed, K., Bernardeau, F., (2000) Phys. Rev. D, 61, p. 123510
  • note

Citas:

---------- APA ----------
Gangui, A., Pogosian, L. & Winitzki, S. (2001) . Cosmic microwave background bispectrum from active models of structure formation. Physical Review D, 64(4).
http://dx.doi.org/10.1103/PhysRevD.64.043001
---------- CHICAGO ----------
Gangui, A., Pogosian, L., Winitzki, S. "Cosmic microwave background bispectrum from active models of structure formation" . Physical Review D 64, no. 4 (2001).
http://dx.doi.org/10.1103/PhysRevD.64.043001
---------- MLA ----------
Gangui, A., Pogosian, L., Winitzki, S. "Cosmic microwave background bispectrum from active models of structure formation" . Physical Review D, vol. 64, no. 4, 2001.
http://dx.doi.org/10.1103/PhysRevD.64.043001
---------- VANCOUVER ----------
Gangui, A., Pogosian, L., Winitzki, S. Cosmic microwave background bispectrum from active models of structure formation. 2001;64(4).
http://dx.doi.org/10.1103/PhysRevD.64.043001