English
 
Help Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
 
 
DownloadE-Mail
  Correcting correlation functions for redshift-dependent interloper contamination

Farrow, D. J., Sanchez, A. G., Ciardullo, R., Cooper, E. M., Davis, D., Fabricius, M., et al. (2021). Correcting correlation functions for redshift-dependent interloper contamination. Monthly Notices of the Royal Astronomical Society, 507(3), 3187-3206. doi:10.1093/mnras/stab1986.

Item is

Basic

show hide
Genre: Journal Article

Files

show Files
hide Files
:
Correcting correlation functions for redshift-dependent interloper contamination.pdf (Any fulltext), 3MB
 
File Permalink:
-
Name:
Correcting correlation functions for redshift-dependent interloper contamination.pdf
Description:
-
Visibility:
Private
MIME-Type / Checksum:
application/pdf
Technical Metadata:
Copyright Date:
-
Copyright Info:
-
License:
-

Locators

show

Creators

show
hide
 Creators:
Farrow, Daniel J.1, Author              
Sanchez, Ariel G.1, Author              
Ciardullo, Robin, Author
Cooper, Erin Mentuch, Author
Davis, Dustin, Author
Fabricius, Maximilian1, Author              
Gawiser, Eric, Author
Gebhardt, Henry S. Grasshorn, Author
Gebhardt, Karl, Author
Hill, Gary J., Author
Jeong, Donghui, Author
Komatsu, Eiichiro, Author
Landriau, Martin, Author
Liu, Chenxu, Author
Saito, Shun, Author
Snigula, Jan1, Author              
Wold, Isak G. B., Author
Affiliations:
1Optical and Interpretative Astronomy, MPI for Extraterrestrial Physics, Max Planck Society, ou_159895              

Content

show
hide
Free keywords: -
 Abstract: The construction of catalogues of a particular type of galaxy can be complicated by interlopers contaminating the sample. In spectroscopic galaxy surveys this can be due to the misclassification of an emission line; for example in the Hobby–Eberly Telescope Dark Energy Experiment (HETDEX) low-redshift [O ii] emitters may make up a few per cent of the observed Ly α emitter (LAE) sample. The presence of contaminants affects the measured correlation functions and power spectra. Previous attempts to deal with this using the cross-correlation function have assumed sources at a fixed redshift, or not modelled evolution within the adopted redshift bins. However, in spectroscopic surveys like HETDEX, where the contamination fraction is likely to be redshift dependent, the observed clustering of misclassified sources will appear to evolve strongly due to projection effects, even if their true clustering does not. We present a practical method for accounting for the presence of contaminants with redshift-dependent contamination fractions and projected clustering. We show using mock catalogues that our method, unlike existing approaches, yields unbiased clustering measurements from the upcoming HETDEX survey in scenarios with redshift-dependent contamination fractions within the redshift bins used. We show our method returns autocorrelation functions with systematic biases much smaller than the statistical noise for samples with at least as high as 7 per cent contamination. We also present and test a method for fitting for the redshift-dependent interloper fraction using the LAE–[O ii] galaxy cross-correlation function, which gives less biased results than assuming a single interloper fraction for the whole sample.

Details

show
hide
Language(s): eng - English
 Dates: 2021-07-16
 Publication Status: Published online
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1093/mnras/stab1986
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: Monthly Notices of the Royal Astronomical Society
  Abbreviation : Mon. Not. Roy. Astron. Soc.
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: -
Pages: - Volume / Issue: 507 (3) Sequence Number: - Start / End Page: 3187 - 3206 Identifier: ISSN: 0035-8711
ISSN: 1365-8711