Results 21 to 30 of about 738 (163)

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

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
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A search for the most massive galaxies: double trouble? [PDF]

, 2005
We describe the results of a search for galaxies with large ({approx}> 350 kms{sup -1}) velocity dispersions. The largest systems we have found appear to be the extremes of the early-type galaxy population: compared to other galaxies with similar ...
York, D. G., Bernardi, Mariangela, Miller, C. J., Sheth, R., Subbarao, M., Schlegel, D., Brinkmann, J., Schneider, D. P., York, D., Schneider, D., Sheth, R. K., Miller, C., Bernardi, M., Nichol, Bob, Frieman, J., Nichol, R. C.   +15 more
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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.
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A multi-wavelength study of powerful high redshift radio galaxies [PDF]

, 2021
Philosophiae Doctor - PhDWe present a new sample of distant powerful radio galaxies, in order to study their host-galaxy properties and provide targets for future observations of Hi absorption with new radio telescopes.
Marubini, Takalani
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NOEMA redshift measurements of bright Herschel galaxies

, 2020
Using the IRAM NOrthern Extended Millimeter Array (NOEMA), we conducted a program to measure redshifts for 13 bright galaxies detected in the Herschel Astrophysical Large Area Survey (H-ATLAS) with S500 _m _ 80 mJy.
Herrera, C., P. van der Werf, Herrera, C.N., L. Marchetti, Harris, A.I., van der Werf, P., Dannerbauer, H., Hughes, D., Baker, A.J., Neri, R., Perez-Fournon, I., Riechers, D.A., Berta, S., Beelen, A., Gavazzi, R., Herrera, C. N., Messias, H., A. Cooray, A. Beelen, D. Hughes, S. Serjeant, M. Negrello, A. I. Harris, M. Lehnert, Young, A.J., Serjeant, S., Baker, A. J., Eales, S., S. Jin, G. Lagache, Buat, V., P. Cox, R. Ivison, H. Messias, Negrello, M., Ivison, R., D. A. Riechers, C. N. Herrera, Cooray, A., Dye, S., S. Berta, C. Yang, Sarjeant, S., Jin, S., S. Urquhart, Omont, A., C. Vlahakis, Bakx, T., S. Eales, S. Dye, A. J. Young, Riechers, D. A., A. Omont, V. Buat, Yang, C., L. Dunne, Lehnert, M., I. Perez-Fournon, Young, A., A. J. Baker, Cox, P., R. Gavazzi, Harris, A. I., Marchetti, L., A. Weiß, Harris, A.L., M. Krips, Lagache, Guilaine, Urquhart, S., Weiss, A., Krips, M., H. Dannerbauer, Lagache, G., Riechers, D., Dunne, L., R. Neri, Werf, P.P. van der, Vlahakis, C., Harris, A., T. Bakx, Baker, A., Young, A. J.   +81 more
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Directly observed relations in complete galaxy samples and the predictions of redshift-distance power laws [PDF]

Proceedings of the National Academy of Sciences, 1986
Directly observed relations in complete galaxy samples (apparent magnitude or diameter vs. redshift) are compared with the predictions of redshift-distance power laws. The predictions are obtained by an objective, nonparametric, statistically uniform, and fully reproducible procedure.
openaire   +2 more sources

Cosmological constraints from the clustering of the Sloan Digital Sky Survey DR7 luminous red galaxies [PDF]

, 2009
We present the power spectrum of the reconstructed halo density field derived from a sample of luminous red galaxies (LRGs) from the Sloan Digital Sky Survey (SDSS) Seventh Data Release (DR7).
Weinberg, D. H., Gunn, James E., Gott, J. Richard, York, D. G., Spergel, David N., Bahcall, Neta A., Knapp, Gillian R., McKay, T. A., Meiksin, A., Schlegel, D. J., Tegmark, M., Szalay, Alexander S., Zeljko, Ivezic, Percival, Will J., Lupton, Robert H., Kron, R. G., Pope, A. C., Frieman, Joshua A., York, Donald G., Meiksin, Avery, Tegmark, Max Erik, Szalay, A. S., Fukugita, M., Mckay, Timothy A., Schneider, D. P., Vogeley, M. S., Fukugita, Masataka, Zehavi, Idit, Verde, L., Reid, B. A., Gott, J. R., Vogeley, Michael S., Schlegel, David J., Weinberg, David H., Spergel, D. N., Strauss, M. A., Nichol, Robert C., Budavari, Tamas, Stoughton, Christopher, Ivezić, Željko, Ivezic, Z., Frieman, J. A., Stoughton, C., Bahcall, N. A., Nichol, R. C., Skibba, Ramin A., Knapp, G. R., Eisenstein, D. J., Schneider, Donald P., Percival, W. J., Eisenstein, Daniel J., Strauss, Michael A., Reid, Beth A., Pope, Adrian C., Stoughton, Chris, Zehavi, I., Tegmark, Max, Lupton, R. H., Skibba, Raman A., Budavari, T., Verde, Licia, Skibba, R. A., Kron, Richard G., Gunn, J. E.   +63 more
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A Time-symmetric Hubble-like Law: Light Rays Grazing Randomly Moving Galaxies Show Distance-Proportional Redshift [PDF]

Zeitschrift für Naturforschung A, 2003
A new class of dissipative structures is proposed that live in real space rather than phase space. A light ray passing through a soup of randomly moving gravitating masses is a case in point. It suffers a “dynamic path elongation” since the random pushes and pulls have a greater probability of increasing than decreasing its path length.
O. E. Rössler, D. Fröhlich, N. Kleiner
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Direct comparison of observed magnitude–redshift relations in complete galaxy samples with systematic predictions of alternative redshift–distance laws [PDF]

Monthly Notices of the Royal Astronomical Society, 1989
La magnitude apparente moyenne directement observee comme fonction du redshift dans chacun des echantillons complets de galaxies est comparee aux predictions des lois en puissance hypothetiques distance-redshift d'un point de vue ...
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