This parameter measured by low z ( z<1) astrophysical methods (SN1A, for instance) gives a value around 74km\/s\/ Mpc, but when measured by high z (z >1000) , (Planck) method, we get a value around 67 km\/s\/Mpc.<\/p>\n\n\n\n
Per the accuracy claimed for the experiences, these two values are not compatible.<\/p>\n\n\n\n
But, whether the cosmological constant is no longer constant, i.e weakening as pointed out by several experiences (DESI) , then the result of the its value, computed by using the angular distance DA<\/sub>, depending on H0<\/sub>, resulting from the position of the first peak in the RFC, 2 D Fourier transform of the CMB, should increase from 67 km\/s\/Mpc up to the targeted 74km\/s\/Mpc, solving then the discrepancy.<\/p>\n\n\n\n Obviously, the mathematical law of its function of z and its physical nature are to be determined.<\/p>\n\n\n\n Per dimensional arguments, as the dimension of the cosmological constant is [L]-2 <\/sup>, and associating L to the size of the universe at the scale of the universe this would induce a law such L(z) = L0<\/sub>(1+z)-2<\/sup> which will provide a value of about 77.5 km\/s\/Mpc (in place of 67.27km\/s\/Mpc) , for z = 1100, higher (about 5%) than the value (74 km\/s\/Mpc) of the SN1A for z < 1. <\/p>\n\n\n\n This is not a physical example and is just used to show the sensibility of such hypothesis. <\/p>\n\n\n\n Obviously, this would imply to modify the density parameters \u00ab\u00a0omega\u00a0\u00bb for fitting the experimental data at different value of z, this modifying the standard cosmological model.<\/p>\n\n\n\n Let us point out that the weakening of the cosmological constant would change the destiny of the universe, the big rip would likely no longer occur!<\/p>\n","protected":false},"excerpt":{"rendered":" The Hubble constant problem This parameter measured by low z ( z<1) astrophysical methods (SN1A, for instance) gives a value around 74km\/s\/ Mpc, but when measured by high z (z >1000) , (Planck) method, we get a value around 67 km\/s\/Mpc. Per the accuracy claimed for the experiences, these two values are not compatible. DESI … Continuer la lecture de « May a weakening of the cosmological constant L solve the Hubble constant discrepancy? 25\/04\/24 »<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-2836","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/vous-avez-dit-bigbang.fr\/index.php?rest_route=\/wp\/v2\/pages\/2836","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vous-avez-dit-bigbang.fr\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/vous-avez-dit-bigbang.fr\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/vous-avez-dit-bigbang.fr\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/vous-avez-dit-bigbang.fr\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2836"}],"version-history":[{"count":1,"href":"https:\/\/vous-avez-dit-bigbang.fr\/index.php?rest_route=\/wp\/v2\/pages\/2836\/revisions"}],"predecessor-version":[{"id":2837,"href":"https:\/\/vous-avez-dit-bigbang.fr\/index.php?rest_route=\/wp\/v2\/pages\/2836\/revisions\/2837"}],"wp:attachment":[{"href":"https:\/\/vous-avez-dit-bigbang.fr\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2836"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}