Several experiments (including BOOMERanG, MAXIMA, DASI, VSA,CBI) have recently detected very low contrast structures in the Cosmic Microwave Background (CMB), the otherwise isotropic radiation coming from the early Universe. These structures have a contrast of the order of 25 ppm and a dominant angular size of one degree. In the current cosmological model, these structuresresult from acoustic oscillations of the primeval plasma within the horizon at recombination (z » 1100). In the framework of the Hot Big Bang theory with the inflationary hypothesis, the statistical properties of the image of the CMB allowus to measure most of the cosmological parameters.
Investigating the Early Universe with the Cosmic Microwave Background Anisotropy / DE BERNARDIS, Paolo; P. A. R., Ade; J. J., Bock; J. R., Bond; J., Borrill; A., Boscaleri; K., Coble; C. R., Contaldi; B. P., Crill; DE TROIA, Grazia; P., Ferreira; K., Ganga; M., Giacometti; E., Hivon; V. V., Hristov; Iacoangeli, Armando; A. H., Jaffe; W. C., Jones; A. E., Lange; L., Martinis; Masi, Silvia; P., Mason; P. D., Mauskopf; Melchiorri, Alessandro; T., Montroy; Nati, Federico; C. B., Netterfield; Pascale, Enzo; Piacentini, Francesco; D., Pogosyan; G., Polenta; F., Pongetti; S., Prunet; G., Romeo; J. E., Ruhl; F., Scaramuzzi. - In: MEMORIE DELLA SOCIETÀ ASTRONOMICA ITALIANA. - ISSN 0037-8720. - STAMPA. - 74:(2003), pp. 75-84.
Investigating the Early Universe with the Cosmic Microwave Background Anisotropy
DE BERNARDIS, Paolo;DE TROIA, Grazia;IACOANGELI, Armando;MASI, Silvia;MELCHIORRI, Alessandro;NATI, FEDERICO;PASCALE, ENZO;PIACENTINI, Francesco;
2003
Abstract
Several experiments (including BOOMERanG, MAXIMA, DASI, VSA,CBI) have recently detected very low contrast structures in the Cosmic Microwave Background (CMB), the otherwise isotropic radiation coming from the early Universe. These structures have a contrast of the order of 25 ppm and a dominant angular size of one degree. In the current cosmological model, these structuresresult from acoustic oscillations of the primeval plasma within the horizon at recombination (z » 1100). In the framework of the Hot Big Bang theory with the inflationary hypothesis, the statistical properties of the image of the CMB allowus to measure most of the cosmological parameters.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.