Clustering of Local Group Distances: Publication Bias or Correlated
                    Measurements? VII. A Distance Framework out to 100 Mpc

Grijs, Richard de; Bono, G.

doi:10.3847/1538-4365/ab8562

Cited by 2 publications

(1 citation statement)

References 99 publications

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“…1. Following graphical depictions of the observed data as a function of publication data [41,42], Fig. 2 illustrates a summary of neutron lifetime experimental results used for analysis since 1972, including measurements listed in/not_in PDG and results unused in PDG following the taxonomic approach of Rajan and Desai [23].…”

Section: Neutron Lifetime Datamentioning

confidence: 99%

MFV approach to robust estimate of neutron lifetime

Zhang

et al. 2022

Eur. Phys. J. C

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Aiming at evaluating the lifetime of the neutron, we introduce a novel statistical method to analyse the updated compilation of precise measurements including the 2022 dataset of Particle Data Group (PDG). Based on the minimization for the information loss principle, unlike the median statistics method, we apply the most frequent value (MFV) procedure to estimate the neutron lifetime, irrespective of the Gaussian or non-Gaussian distributions. Providing a more robust way, the calculated result of the MFV is $$\tau _n=881.16^{+2.25}_{-2.35}$$ τ n = 881 . 16 - 2.35 + 2.25 s with statistical bootstrap errors, while the result of median statistics is $$\tau _n=881.5^{+5.5}_{-3}$$ τ n = 881 . 5 - 3 + 5.5 s according to the binomial distribution. Using the different central estimates, we also construct the error distributions of neutron lifetime measurements and find the non-Gaussianity, which is still meaningful.

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Section: Neutron Lifetime Datamentioning

confidence: 99%

MFV approach to robust estimate of neutron lifetime

Zhang

et al. 2022

Eur. Phys. J. C

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Globular Clusters in NGC 4839 Falling into Coma: Evidence for the Second Infall?

Oh¹,

Lee²,

Jang

2023

ApJ

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NGC 4839 is the brightest galaxy (cD) of the NGC 4839 group at R ≈ 1 Mpc in the southwest of the Coma cluster, which is known to be falling into Coma. However, it has been controversial whether it is in the first phase of infall or in the second phase of infall after passing the Coma center. We present a wide field study of globular clusters (GCs) in NGC 4839 and its environment based on Hyper Suprime-Cam gr images in the Subaru archive. We compare the GC system of NGC 4839 with that of NGC 4816, which is the brightest member (S0) of the nearby group and lies at a similar distance in the west from the Coma center. Interestingly the spatial distribution of the GCs in NGC 4839 is significantly more compact than that of the GCs in NGC 4816. In addition, the radial number density profile of the GCs in NGC 4839 shows an abrupt drop at R N4839 ≈ 80 kpc, while that of the GCs in NGC 4816 shows a continuous slow decline even in the outer region at 80 < R N4816 < 500 kpc. The effective radius of the NGC 4839 GC system is about 3 times smaller than that of the NGC 4816 GC system. This striking difference can be explained if NGC 4839 lost a significant fraction of the GCs in its outskirt when it passed through Coma. This supports strongly the second-infall scenario where the NGC 4839 passed the Coma center about 1.6 Gyr ago, and began the second infall after reaching the apocenter in the southwest recently.

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Clustering of Local Group Distances: Publication Bias or Correlated Measurements? VII. A Distance Framework out to 100 Mpc

Cited by 2 publications

References 99 publications

MFV approach to robust estimate of neutron lifetime

MFV approach to robust estimate of neutron lifetime

Globular Clusters in NGC 4839 Falling into Coma: Evidence for the Second Infall?

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