Cosmographic view on the <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi>H</mml:mi></mml:mrow><mml:mrow><mml:mn>0</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math> and <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mi>σ</mml:mi><mml:mn>8</mml:mn></mml:msub></mml:math> tensions
نویسندگان
چکیده
Measurements of the ${H}_{0}$ and ${\ensuremath{\sigma}}_{8}$ parameters within standard cosmological model recently highlighted significant statistical tensions between cosmic microwave background low-redshift probes, such as local distance ladder, weak lensing, galaxy clustering surveys. In this work, we frame geometrical distances in a model-independent way by means cosmographic approximations range $z\ensuremath{\in}(0,2.3)$ to take into account robust dataset composed baryon acoustic oscillations (BAOs), type Ia supernovae (SN), chronometer (CC) data, measurements from redshift space distortions (RSDs). From joint analysis $\mathrm{BAO}+\mathrm{SN}+\mathrm{CC}+\mathrm{RSD}$, find an accuracy $\ensuremath{\sim}1.4%$ $\ensuremath{\sim}3.7%$ on ${\ensuremath{\sigma}}_{8}$, respectively. Our result for is at $2\ensuremath{\sigma}$ tension with SH0ES team, while our estimate $2.6\ensuremath{\sigma}$ Planck-CMB analysis. This inference shows statistically smaller when compared those estimated via Lambda cold dark matter ($\mathrm{\ensuremath{\Lambda}}\mathrm{CDM}$) model. We also that jerk parameter can deviate more than $3\ensuremath{\sigma}$ $\mathrm{\ensuremath{\Lambda}}\mathrm{CDM}$ prediction. Under same setup, present results considering Gaussian prior allows improved models. The work brings observational constraints new perspective, which differs predictions obtained paradigm.
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ژورنال
عنوان ژورنال: Physical review
سال: 2023
ISSN: ['0556-2813', '1538-4497', '1089-490X']
DOI: https://doi.org/10.1103/physrevd.108.023523