Results 31 to 40 of about 209,680 (298)

Spherical Redshift Distortions [PDF]

, 1995
Peculiar velocities induce apparent line of sight displacements of galaxies in redshift space, distorting the pattern of clustering in the radial versus transverse directions.
Culhane, M., Hamilton, A. J. S.
core   +2 more sources

Leveraging Machine Learning for Photometric Redshift Estimation of JWST Galaxies

Edinburgh Student Journal of Science
With the launch of JWST, the volume and complexity of astronomical data are increasing, a trend that will continue with future instruments such as SKA and Euclid. It is inevitable that data-driven methods will become more prominent alongside model-driven
Julie Kalná, Ryan Begley, Callum Donnan
doaj   +1 more source

Six Peaks Visible in the Redshift Distribution of 46,400 SDSS Quasars Agree with the Preferred Redshifts Predicted by the Decreasing Intrinsic Redshift Model

, 2006
The redshift distribution of all 46,400 quasars in the Sloan Digital Sky Survey (SDSS) Quasar Catalog III, Third Data Release, is examined. Six Peaks that fall within the redshift window below z = 4, are visible.
Bajan K., Bajan K., Box T. C., Burbidge G., D. McDiarmid, Karlsson K. G., Karlsson K. G., Karlsson K. G., Lake R. G., M. B. Bell, Roeder R. C.   +10 more
core   +2 more sources

О красном смещении спектров галактик [PDF]

Философия и космология, 2015
It is observed the spherical model of the Metagalaxy (Metagalaxy here is the observed part of the Universe) with the observer in the center of the sphere.
Избрехт А. Р.
doaj  

Metals at High Redshifts [PDF]

Proceedings of the International Astronomical Union, 2001
The amount of metals present in the Universe and its cosmological evolution is a key issue for our understanding of how star formation proceeds from the collapse of the first objects to the formation of present day galaxies. We discuss here recent results at the two extremes of the density scale.1.
openaire   +2 more sources

Fen Bilgisi Öğretmen Adaylarının E. Hubble’ın “Kırmızıya Kayma Yasası” Çerçevesinde Bilgi ve Bilişsel Süreç Yeterliklerinin İncelenmesi

Sakarya University Journal of Education, 2018
Bu çalışmanın amacı, Hubble’ın “Kırmızıya KaymaYasası” çerçevesinde test oluşturularak fen bilgisi öğretmen adaylarının bilgive bilişsel süreç yeterliklerinin incelenmesidir. Araştırmada nitel durumçalışması deseni kullanılmıştır.
Nilgün Aydın, Abdullah Aydın
doaj   +1 more source

Photometric redshifts and quasar probabilities from a single, data-driven generative model

, 2012
We describe a technique for simultaneously classifying and estimating the redshift of quasars. It can separate quasars from stars in arbitrary redshift ranges, estimate full posterior distribution functions for the redshift, and naturally incorporate ...
Abazajian, Abell, Adam D. Myers, Aihara, Assef, Atlee, Ball, Ball, Baum, Benjamin A. Weaver, Benítez, Bovy, Bowen, Budavári, Butler, David Schiminovich, David W. Hogg, Donald P. Schneider, Eisenstein, Erin S. Sheldon, Fan, Francis, Glikman, Gunn, Gunn, Hennawi, Hennawi, Hennawi, Hennawi, Hogg, Hook, Hopkins, Hutchings, Ivezić, Ivezić, Ivezić, Jimenez, Jo Bovy, Jon Brinkmann, Joseph F. Hennawi, Jurić, Kaczmarczik, Kelly, Kozłowski, Kozłowski, Lupton, MacLeod, MacLeod, Martin, Morrissey, Myers, Myers, Myers, Myers, Møller, Padmanabhan, Peth, Picard, Pier, Prochaska, Richard G. McMahon, Richards, Richards, Richards, Richards, Richards, Richards, Richards, Ross, Schlegel, Schmidt, Schneider, Scranton, Scranton, Shen, Smith, Stoughton, Suchkov, Trammell, Vanden Berk, Weinstein, Worseck, Yip, York   +83 more
core   +1 more source

The influence of wavelength, flux, and lensing selection effects on the redshift distribution of dusty, star-forming galaxies [PDF]

, 2015
We interpret the large variety of redshift distributions of galaxies found by far-infrared and (sub-)millimeter deep surveys depending on their depth and wavelength using the Bethermin et al. (2012) phenomenological model of galaxy evolution.
Benson, Berta, Blain, Béthermin, Béthermin, Béthermin, Béthermin, Carlos De Breuck, Casey, Chapman, Drouart, Emanuele Daddi, Geach, Hezaveh, Hezaveh, Ilbert, Madau, Magdis, Mark Sargent, Matthieu Béthermin, Michałowski, Planck Collaboration Int. VII, Sargent, Sargent, Schreiber, Simpson, Simpson, Smail, Smolcic, Staguhn, Vieira, Vieira, Wardlow, Weiß, Yun, Zavala   +35 more
core   +5 more sources

Fast Radio Burst Energy Function in the Presence of DM_host Variation

Universe
Fast radio bursts (FRBs) have been found in great numbers, but the physical mechanism of these sources is still a mystery. The redshift evolutions of the FRB energy distribution function and the volumetric rate shed light on the origin of FRBs.
Ji-Guo Zhang, Yichao Li, Jia-Ming Zou, Ze-Wei Zhao, Jing-Fei Zhang, Xin Zhang   +5 more
doaj   +1 more source

An improved redshift indicator for Gamma-Ray Bursts, based on the prompt emission

, 2006
We propose an improved version of the redshift indicator developed by Atteia (2003), which gets rid of the dependence on the burst duration and provides better estimates for high-redshift GRBs.
Atteia, Jean-Luc, Collaboration, the the HETE Science Team, Lamb, Don Q., Pélangeon, Alexandre, Ricker, George R.   +4 more
core   +2 more sources