Scalar potential model of redshift and discrete redshift
نویسندگان
چکیده
منابع مشابه
Scalar potential model of redshift and discrete redshift
On the galactic scale the universe is inhomogeneous and redshift z is occasionally less than zero. A scalar potential model (SPM) that links the galaxy scale z to the cosmological scale z of the Hubble Law is postulated. Several differences among galaxy types suggest that spiral galaxies are Sources and that early type, lenticular, and irregular galaxies are Sinks of a scalar potential field. T...
متن کاملProbing scalar tensor theories for gravity in Redshift-Space
We present measurements of the spatial clustering statistics in redshift space of various scalar field modified gravity simulations. We utilise the two-point and the three-point correlation functions to quantify the spatial distribution of dark matter halos within these simulations and thus discern between the models. We compare ΛCDM simulations to various modified gravity scenarios and find co...
متن کاملOn estimating redshift and luminosity distributions in photometric redshift surveys
The luminosity functions of galaxies and quasars provide invaluable information about galaxy and quasar formation. Estimating the luminosity function from magnitude limited samples is relatively straightforward, provided that the distances to the objects in the sample are known accurately; techniques for doing this have been available for about thirty years. However, distances are usually known...
متن کاملOrigin of redshift asymmetries : how Λ CDM explains anomalous redshift
Aims. Several authors have found a statistically significant excess of galaxies with higher redshifts relative to the group centre, so called discordant redshifts, in particular in groups where the brightest galaxy, identified in apparent magnitudes, is a spiral. Our aim is to explain the observed redshift excess. Methods. We use a semi-analytical galaxy catalogue constructed from the Millenniu...
متن کاملA Model-Independent Photometric Redshift Estimator
We derive a simple empirical photometric redshift estimator using a training set of galaxies with multiband photometry and measured redshifts in the Hubble Deep Field (HDF). This estimator is model-independent; it does not use spectral templates. The dispersion between the estimated redshifts and the spectroscopically measured ones is small; the dispersions range from σz ≃ 0.03 to 0.1 for z ∼< ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: New Astronomy
سال: 2006
ISSN: 1384-1076
DOI: 10.1016/j.newast.2005.09.002