Results 61 to 70 of about 1,149,467 (210)

Reidentification of Redshifts of SDSS Galaxies Overlapped with Galactic Objects

The Astronomical Journal
This work presents a catalog of reidentified redshifts of 853 galaxies for which the redshifts of overlapping foreground objects were registered in the Sloan Digital Sky Survey (SDSS) DR16 Database.
Masafumi Yagi, Masanori Iye, Hideya Fukumoto   +2 more
doaj   +1 more source

The TOOT00 redshift survey of radio sources

Astronomische Nachrichten, 2006
AbstractWe present first results from the study of the TOOT00 region consisting of 47 radio sources brighter than 100 mJy at 151 MHz. We have 81% spectroscopic redshift completeness. From theK‐zdiagram we deduce that the host galaxies are similar to ∼ 3L* passively evolved elliptical galaxies and thus estimate the redshifts of the 9 sources without a ...
Vardoulaki, E., Rawlings, S., Hill, G. J., Croft, S., Brand, K., Riley, J., Willott, Christopher   +6 more
openaire   +3 more sources

THE 2MASS REDSHIFT SURVEY—DESCRIPTION AND DATA RELEASE [PDF]

The Astrophysical Journal Supplement Series, 2012
Accepted for publication in The Astrophysical Journal Supplement Series. The 2MRS catalogs and a version of the paper with higher-resolution figures can be found at http://tdc-www.harvard.edu/2mrs/
Huchra, John P., Macri, Lucas M., Masters, Karen L., Jarrett, Thomas H., Berlind, Perry, Calkins, Michael, Crook, Aiden C., Cutri, Roc, ErdoÄŸdu, Pirin, Falco, Emilio, George, Teddy, Hutcheson, Conrad M., Lahav, Ofer, Mader, Jeff, Mink, Jessica D., Martimbeau, Nathalie, Schneider, Stephen, Skrutskie, Michael, Tokarz, Susan, Westover, Michael   +19 more
openaire   +3 more sources

Gravitational lensing in galaxy redshift surveys [PDF]

, 1999
Gravitationally-lensed quasars should be discovered as a by-product of large galaxy redshift surveys, being discovered spectroscopically when a low-redshift galaxy exhibits high-redshift quasar emission lines. The number of lenses expected is higher than
Mortlock, Daniel J, Webster, Rachel L
core  

Self-calibration of photometric redshift scatter in weak-lensing surveys

, 2010
Photometric redshift (photo-z) errors, especially catastrophic errors, are a major uncertainty for precision weak-lensing cosmology. We find that the shear (galaxy number) density and density-density cross-correlation measurements between photo-z bins ...
Pen, Ue-Li, Bernstein, Gary, Zhang, Pengjie   +2 more
core   +1 more source

Measuring photometric redshifts for high-redshift radio source surveys

, 2023
With the advent of deep, all-sky radio surveys, the need for ancillary data to make the most of the new, high-quality radio data from surveys like the Evolutionary Map of the Universe (EMU), GLEAM-X, VLASS and LoTSS is growing rapidly.
Wang, X. Rosalind, Guo, Ying, Luken, Kieran J., Norris, Ray P., Park, Laurence A. F., Filipovic, Miroslav D.   +5 more
core   +2 more sources

Photometric Redshift Probability Density Functions via Neural Network Classification for DESI Legacy Imaging Surveys and Pan-STARRS

The Astrophysical Journal Supplement Series
We present a neural network classification (NNC) method for photometric redshift estimation that produces well-calibrated redshift probability density functions (PDFs).
Da-Chuan Tian, Zhong-Lue Wen, Jun-Qing Xia   +2 more
doaj   +1 more source

Mock 2dF and SDSS galaxy redshift surveys [PDF]

, 1998
We present a comprehensive set of mock 2dF and SDSS galaxy redshift surveys constructed from a set of large, high-resolution cosmological N-body simulations.
Shaun Cole, David H. Weinberg, Cole, S, Hatton, S, Weinberg, DH, Steve Hatton, Carlos S. Frenk, Frenk, CS, Ab S Tract   +8 more
core   +2 more sources

DESI Spectroscopy of HETDEX Emission-line Candidates. I. Line Discrimination Validation

The Astrophysical Journal
The Hobby–Eberly Dark Energy Experiment (HETDEX) is an untargeted spectroscopic galaxy survey that uses Ly α- emitting galaxies (LAEs) as tracers of 1.9 < z < 3.5 large-scale structure. Most detections consist of a single emission line, whose identity is
Martin Landriau, Erin Mentuch Cooper, Dustin Davis, Karl Gebhardt, Robin Ciardullo, Éric Armengaud, Arjun Dey, Anand Raichoor, David J. Schlegel, Michael Wilson, J. Aguilar, S. Ahlen, D. Bianchi, D. Brooks, T. Claybaugh, A. de la Macorra, S. Ferraro, J. E. Forero-Romero, E. Gaztañaga, S. Gontcho A Gontcho, G. Gutierrez, C. Hahn, K. Honscheid, C. Howlett, M. Ishak, S. Juneau, R. Kehoe, T. Kisner, Anthony Kremin, L. Le Guillou, Michael E. Levi, M. Manera, A. Meisner, R. Miquel, J. Moustakas, S. Nadathur, I. Pérez-Ràfols, C. Poppett, F. Prada, G. Rossi, E. Sanchez, M. Schubnell, D. Sprayberry, G. Tarlé, B. A. Weaver, R. Zhou, H. Zou, Daniel J. Farrow, Gary J. Hill, Donghui Jeong, Chenxu Liu, Shun Saito, Donald P. Schneider   +52 more
doaj   +1 more source

Overconstrained Dynamics in Galaxy Redshift Surveys [PDF]

The Astrophysical Journal, 2001
The least-action principle (LAP) method is used on four galaxy redshift surveys to measure the density parameter Omega_m and the matter and galaxy-galaxy power spectra. The datasets are PSCz, ORS, Mark III and SFI. The LAP method is applied on the surveys simultaneously, resulting in an overconstrained dynamical system that describes the cosmic ...
openaire   +2 more sources