哈勃常数113.105.155.213为67.8km/s/mpc东莞机房

对宇宙年龄的估计是基于一个至关重要的数字,东莞机房即哈勃常数。哈勃常数描述宇宙膨胀的速率,在宇宙学研究中起着基本作用。但有一点令人尴尬的是,到目前为止,我们还无法确定哈勃常数的确切值,因为这两种主流方法测量的哈勃常数存在明显的差异。

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其中一个数值是用宇宙微波背景辐射来测量的。东莞机房这种方法测量宇宙微波背景辐射中重子声振荡的大小。在取代冷暗物质的宇宙学模型后,哈勃常数为67.8km/s/mpc。

另一个答案,由诺贝尔奖得主亚当里斯领导,他们的观察是IA型超新星(一种由双星系统形成的超新星)和一颗头部可变恒星(一种光度和脉动周期直接关联的变星)。Ia超新星的亮度是固定的,而造父变星的亮度周期性变化,使其成为宇宙中的"标准光源"。天文学家根据恒星的光谱红移和测量的绝对距离计算哈勃常数为74公里/秒/毫微秒。但是这种方法的问题是,超新星的绝对距离只能从相对距离中推导出来,不能直接测量。

自那以后,一些科学家试图以其他方式解决哈勃常数的争议,但问题变得更加复杂。就在7月份,芝加哥大学(University Of Chicago)的研究小组使用红色超级明星作为"标准烛光",并提出哈勃常数为69.8公里/mpc-这与以往的任何答案都不一样。

现在,在"科学"杂志上发表的一项研究中,德国马克斯普朗东莞机房克研究所的InhJee等人提出了一个新的答案,82 km/s/mpc,使用一种新的方法,引力透镜。当然,由于目前数据量有限,整个分析的误差很大,需要上下浮动约8km/s/mpc。换句话说,研究测得的哈勃常数在74~90m/s/mpc之间。根据平均82km/s/mpc,宇宙的年龄仅为114亿年,比最初的137亿年至少了20亿年。

45.61.244.165 45.61.244.207 45.61.244.249 45.61.244.39 45.61.244.81 45.61.244.123 45.61.244.15
45.61.244.166 45.61.244.208 45.61.244.250 45.61.244.40 45.61.244.82 45.61.244.124 45.61.244.16
45.61.244.167 45.61.244.209 45.61.244.251 45.61.244.41 45.61.244.83 45.61.244.125 45.61.244.17
45.61.244.168 45.61.244.210 45.61.244.252 45.61.244.42 45.61.244.84 45.61.244.126 45.61.244.18
45.61.244.127 45.61.244.169 45.61.244.211 45.61.244.1 45.61.244.43 45.61.244.85 45.61.244.55
45.61.244.128 45.61.244.170 45.61.244.212 45.61.244.2 45.61.244.44 45.61.244.86 45.61.244.56
45.61.244.129 45.61.244.171 45.61.244.213 45.61.244.3 45.61.244.45 45.61.244.87 45.61.244.57
45.61.244.130 45.61.244.172 45.61.244.214 45.61.244.4 45.61.244.46 45.61.244.88 45.61.244.58
45.61.244.131 45.61.244.173 45.61.244.215 45.61.244.5 45.61.244.47 45.61.244.89 45.61.244.59
45.61.244.132 45.61.244.174 45.61.244.216 45.61.244.6 45.61.244.48 45.61.244.90 45.61.244.60
45.61.244.133 45.61.244.175 45.61.244.217 45.61.244.7 45.61.244.49 45.61.244.91 45.61.244.97
45.61.244.145 45.61.244.187 45.61.244.229 45.61.244.19 45.61.244.61 45.61.244.103 45.61.244.139
45.61.244.146 45.61.244.188 45.61.244.230 45.61.244.20 45.61.244.62 45.61.244.104 45.61.244.140
45.61.244.147 45.61.244.189 45.61.244.231 45.61.244.21 45.61.244.63 45.61.244.105 45.61.244.141
45.61.244.148 45.61.244.190 45.61.244.232 45.61.244.22 45.61.244.64 45.61.244.106 45.61.244.142
45.61.244.149 45.61.244.191 45.61.244.233 45.61.244.23 45.61.244.65 45.61.244.107 45.61.244.143
45.61.244.150 45.61.244.192 45.61.244.234 45.61.244.24 45.61.244.66 45.61.244.108 45.61.244.144
45.61.244.151 45.61.244.193 45.61.244.235 45.61.244.25 45.61.244.67 45.61.244.109 45.61.244.223
45.61.244.152 45.61.244.194 45.61.244.236 45.61.244.26 45.61.244.68 45.61.244.110 45.61.244.224
45.61.244.153 45.61.244.195 45.61.244.237 45.61.244.27 45.61.244.69 45.61.244.111 45.61.244.225
45.61.244.154 45.61.244.196 45.61.244.238 45.61.244.28 45.61.244.70 45.61.244.112 45.61.244.226
45.61.244.155 45.61.244.197 45.61.244.239 45.61.244.29 45.61.244.71 45.61.244.113 45.61.244.227
45.61.244.156 45.61.244.198 45.61.244.240 45.61.244.30 45.61.244.72 45.61.244.114 45.61.244.228
45.61.244.157 45.61.244.199 45.61.244.241 45.61.244.31 45.61.244.73 45.61.244.115 45.61.244.181
45.61.244.158 45.61.244.200 45.61.244.242 45.61.244.32 45.61.244.74 45.61.244.116 45.61.244.182
45.61.244.159 45.61.244.201 45.61.244.243 45.61.244.33 45.61.244.75 45.61.244.117 45.61.244.183
45.61.244.160 45.61.244.202 45.61.244.244 45.61.244.34 45.61.244.76 45.61.244.118 45.61.244.184
45.61.244.161 45.61.244.203 45.61.244.245 45.61.244.35 45.61.244.77 45.61.244.119 45.61.244.185
45.61.244.162 45.61.244.204 45.61.244.246 45.61.244.36 45.61.244.78 45.61.244.120 45.61.244.186
45.61.244.163 45.61.244.205 45.61.244.247 45.61.244.37 45.61.244.79 45.61.244.121 45.61.244.13
45.61.244.164 45.61.244.206 45.61.244.248 45.61.244.38 45.61.244.80 45.61.244.122 45.61.244.14
45.61.244.134 45.61.244.176 45.61.244.218 45.61.244.8 45.61.244.50 45.61.244.92 45.61.244.98
45.61.244.135 45.61.244.177 45.61.244.219 45.61.244.9 45.61.244.51 45.61.244.93 45.61.244.99
45.61.244.136 45.61.244.178 45.61.244.220 45.61.244.10 45.61.244.52 45.61.244.94 45.61.244.100
45.61.244.137 45.61.244.179 45.61.244.221 45.61.244.11 45.61.244.53 45.61.244.95 45.61.244.101
45.61.244.138 45.61.244.180 45.61.244.222 45.61.244.12 45.61.244.54 45.61.244.96 45.61.244.102

 

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