Results 1 to 10 of about 5,210 (169)

Distance Measurement of Galaxies to a Redshift of ∼ 0.1 Using the CO-Line Tully-Fisher Relation [PDF]

Publications of the Astronomical Society of Japan, 1996
We report on the first results of a long-term project to derive the distances of galaxies at cosmological distances by applying the CO-line width–luminosity relation. We have obtained deep CO-line observations of galaxies at redshifts of up to cz ∼ 29000 km s-1 using the Nobeyama 45-m mm-wave telescope; also, some supplementary data were obtained using
Sofue, Y., Schoeniger, F., Honma, M., Tutui, Y., Ichikawa, T., Wakamatsu, K., Kazes, I., Dickey, J.   +7 more
openaire   +2 more sources

Apparent nonlinearity of the redshift-distance relation in infrared astronomical satellite galaxy samples. [PDF]

Proceedings of the National Academy of Sciences, 1992
The Hubble (linear) redshift-distance law predicts values for directly observed quantities that are quite deviant from their actual values in infrared astronomical satellite (IRAS) galaxy samples. These samples are objectively defined, have modern measurements, are presently the largest such samples to which the Hubble law is theoretically applicable ...
I E, Segal, J F, Nicoll
openaire   +2 more sources

Redshift-distance Survey of Early-type Galaxies: The D_n-sigma Relation

The Astronomical Journal, 2002
In this paper R-band photometric and velocity dispersion measurements for a sample of 452 elliptical and S0 galaxies in 28 clusters are used to construct a template D_n-sigma relation. This template relation is constructed by combining the data from the 28 clusters, under the assumption that galaxies in different clusters have similar properties.
Bernardi, M., Alonso, M. V., da Costa, L. N., Willmer, C. N. A., Wegner, G., Pellegrini, P. S., Rite`, C., Maia, M. A. G.   +7 more
openaire   +3 more sources

Testing ΛCDM at the lowest redshifts with SN Ia and galaxy velocities [PDF]

, 2016
Peculiar velocities of objects in the nearby universe are correlated due to the gravitational pull of large-scale structure. By measuring these velocities, we have a unique opportunity to test the cosmological model at the lowest redshifts.
D. Huterer, D. Shafer, D. Scolnic, F. Schmidt   +3 more
semanticscholar   +1 more source

Prospect of Precision Cosmology and Testing General Relativity using Binary Black Holes- Galaxies Cross-correlation [PDF]

Monthly notices of the Royal Astronomical Society
Modified theories of gravity predict deviations from General Relativity (GR) in the propagation of gravitational waves (GW) across cosmological distances.
S. Afroz, Suvodip Mukherjee
semanticscholar   +1 more source

Jellyfish galaxies with the IllustrisTNG simulations – citizen-science results towards large distances, low-mass hosts, and high redshifts

Monthly Notices of the Royal Astronomical Society, 2023
ABSTRACT We present the ‘Cosmological Jellyfish’ project – a citizen-science classification program to identify jellyfish (JF) galaxies within the IllustrisTNG cosmological simulations. JF are satellite galaxies that exhibit long trailing gas features – ‘tails’ – extending from their stellar body.
Elad Zinger, Gandhali D Joshi, Annalisa Pillepich, Eric Rohr, Dylan Nelson   +4 more
openaire   +3 more sources

A robust cosmic standard ruler from the cross-correlations of galaxies and dark sirens [PDF]

Journal of Cosmology and Astroparticle Physics
Observations of gravitational waves (GWs) from dark sirens allow us to infer their locations and distances. Galaxies, on the other hand, have precise angular positions but no direct measurement of their distances — only redshifts.
João Ferri, I. L. Tashiro, L. Abramo, Isabela Matos, M. Quartin, R. Sturani   +5 more
semanticscholar   +1 more source

Distance Causes Departure: Characteristics of Galaxies Vulnerable to Photometric Redshift Measurements

Journal of Physics: Conference Series, 2022
Abstract In this article, we developed the method for calculating photometric redshift through a simple linear regression model. By studying the training set DR17 in Sloan Digital Sky Survey (SDSS), using the spectroscopic redshift data do the fitting job, we got linear coefficients and apply it to the target set and study the model.
openaire   +1 more source

Precision of Hubble constant derived using black hole binary absolute distances and statistical redshift information [PDF]

, 2007
Measured gravitational waveforms from black hole binary inspiral events directly determine absolute luminosity distances. To use these data for cosmology, it is necessary to independently obtain redshifts for the events, which may be difficult for those ...
C. MacLeod, C. Hogan
semanticscholar   +1 more source

A Determination of the Hubble Constant from Cepheid Distances and a Model of the Local Peculiar Velocity Field [PDF]

, 2000
We present a measurement of the Hubble constant based on Cepheid distances to 27 galaxies within 20 Mpc. We take the Cepheid data from published measurements by the Hubble Telescope Key Project on the Distance Scale (H0KP).
J. Willick, Puneet Batra
semanticscholar   +1 more source