分类： 天文学 >> 星系和宇宙学 提交时间： 2025-02-21
摘要： The paper Baruch (2025a) shows that there is an apparent wavelength-independent extinction coefficient of 0.06 magnitudes per kiloparsec across the Milky Way. Baruch 2025b) shows that the Hubble constant values of Riess et al (2016, 2018a and 2018b), Freedman et al (2019) and the Planck satellite (Ade et al 2014) coincide if the extinction coefficient is a function of the density of dark matter. This wavelength-independent extinction has a frequency threshold between 160Ghz and 300 Thz. This paper seeks a possible process by which dark matter can absorb light.The current data on dark matter is reviewed to determine how dark matter could act as a wavelength-independent absorber of light in the visible frequencies. The discussion of the role of inertia and momentum in general relativity and its relationship with the other forces since the Einstein paper on General Relativity of 1915 is reviewed. It is conjectured that for a pair of gravitationally bound dark matter particles a photon with sufficient momentum would effectively “ionise” the pair, releasing the two dark matter particles, and absorbing the photon. The approximate mass of the dark matter particle is derived. It is suggested that this dark matter extinction provides real data to help settle the role of inertia and momentum in General Relativity. A test for the “ionisation” process is suggested.
分类： 天文学 >> 星系和宇宙学 提交时间： 2025-02-06
摘要： The Hubble constant H0 defines the rate of expansion of the Universe. Currently there are three conflicting values of the Hubble constant. The Planck team (Ade et al 2014), the Carnegie-Chicago team (Freedman et al 2019), and the SHoES team (Riess et al 2016) have all produced values that disagree beyond their errors. The SHoES team has shown that the Hubble constant is increasing in recent times (Riess et al 1998) reflecting an increase or acceleration in the rate of expansion of the Universe. Baruch (2024a) “Are Stellar Distance Measurements Opening a Window into New Physics?” has reviewed recent data of the SHoES team (Riess et al 2021) where Hubble telescope photometric data for two groups of Cepheids at different distances was linked to Gaia parallax measurements of the same stars. It is shown “beyond reasonable doubt” how for this unique set of precise data the zero-point correction can be eliminated and a wavelength independent (colourless) extinction of light across the Milky Way galaxy revealed. This current paper seeks out the cause of this extinction and shows that the data of Freedman et al 2019 neatly fits a wavelength independent extinction when the cause of the extinction is attributed to dark matter. The extinction coefficients are derived. All the Riess and the Freedman values of the Hubble constant are shown to agree with the Planck Satellite (Ade et al 2014) value within the error bars when the differences are attributed to dark matter extinction. The recent time acceleration in the expansion of the Universe also is shown to be a function of intergalactic dark matter extinction. The key properties required of the dark matter are defined.
分类： 天文学 >> 星系和宇宙学 提交时间： 2025-01-24
摘要： This paper derives a mathematical analysis of the apparent conflict between photometrically based and parallax distance measurements. The best photometrically based distance measurements using the Hubble telescope when compared with the algorithm corrected Gaia parallax measurements do not agree. The algorithm corrected Gaia parallax measurements are quoted by the Gaia team as correct to within a few mico arcseconds, but Riess et al (2021) subtract a further ten micro arc-seconds from each Cepheid parallax. These further corrections to the Gaia data eliminate the conflict and support the Hubble tension derived by Riess et al (2021). There is no conflict in the Hubble photometric and Gaia parallax distances in the Riess et al (2022) paper. Riess et al (2022) use earlier Gaia derived cluster distances and adopt a zero point correction derived from the photometry. The mathematical analysis shows that an alternative method of eliminating the conflict indicates a tiny attenuation of light in the Milky Way. It is argued that this attenuation of the light is completely wavelength-independent. All photometry is equally effected by this wavelength independent attenuation, which requires new physics. Photometry cannot be used to reveal any new physics due to the absorption being wavelength independent. It is shown that when the wavelength independent absorption is included in calculating the absolute magnitude of Cepheids it removes the Hubble tension.
点击量
待评议
点击量
下载量
评论
