A 5 per cent measurement of the Hubble–Lemaître constant from Type II supernovae
نویسندگان
چکیده
The most stringent local measurement of the Hubble-Lema\^itre constant from Cepheid-calibrated Type Ia supernovae (SNe~Ia) differs value inferred via cosmic microwave background radiation ({\it Planck}$+\Lambda$CDM) by $\sim 5\sigma$. This so-called "Hubble tension" has been confirmed other independent methods, and thus does not appear to be a possible consequence systematic errors. Here, we continue upon our prior work using II provide another, largely-independent method measure constant. From 13 SNe~II with geometric, Cepheid, or tip red giant branch (TRGB) host-galaxy distance measurements, derive H$_0= 75.4^{+3.8}_{-3.7}$\,km\,s$^{-1}$\,Mpc$^{-1}$ (statistical errors only), consistent but in disagreement 2.0\sigma$ {\it Planck}$+\Lambda$CDM value. Using only Cepheids ($N=7$), find H$_0 = 77.6^{+5.2}_{-4.8}$\,km\,s$^{-1}$\,Mpc$^{-1}$, while TRGB ($N=5$), 73.1^{+5.7}_{-5.3}$\,km\,s$^{-1}$\,Mpc$^{-1}$. Via variants dataset, uncertainty estimate 1.5\,km\,s$^{-1}$\,Mpc$^{-1}$. median derived these just 0.3\,km\,s$^{-1}$\,Mpc$^{-1}$ that produced fiducial model. Because replace SNe~Ia -- do statistically significant difference between Cepheid H$_0$ measurements reveals no indication could sources "H$_0$ tension." We caution, however, conclusions rest modest calibrator sample; as this sample grows future, results should verified.
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 2022
ISSN: ['0035-8711', '1365-8711', '1365-2966']
DOI: https://doi.org/10.1093/mnras/stac1661