Cosmic web-type classification using decision theory
File(s)
Accepted version
OA Location
Author(s)
Leclercq, F
Jasche, J
Wandelt, B
Type
Journal Article
Abstract
Aims.
We propose a decision criterion for segmenting the cosmic web into di
ff
erent structure types (voids, sheets, filaments, and
clusters) on the basis of their respective probabilities and the strength of data constraints.
Methods.
Our approach is inspired by an analysis of games of chance where the gambler only plays if a positive expected net gain
can be achieved based on some degree of privileged information.
Results.
The result is a general solution for classification problems in the face of uncertainty, including the option of not committing
to a class for a candidate object. As an illustration, we produce high-resolution maps of web-type constituents in the nearby Universe
as probed by the Sloan Digital Sky Survey main galaxy sample. Other possible applications include the selection and labelling of
objects in catalogues derived from astronomical survey data.
We propose a decision criterion for segmenting the cosmic web into di
ff
erent structure types (voids, sheets, filaments, and
clusters) on the basis of their respective probabilities and the strength of data constraints.
Methods.
Our approach is inspired by an analysis of games of chance where the gambler only plays if a positive expected net gain
can be achieved based on some degree of privileged information.
Results.
The result is a general solution for classification problems in the face of uncertainty, including the option of not committing
to a class for a candidate object. As an illustration, we produce high-resolution maps of web-type constituents in the nearby Universe
as probed by the Sloan Digital Sky Survey main galaxy sample. Other possible applications include the selection and labelling of
objects in catalogues derived from astronomical survey data.
Date Issued
2015-04-01
Date Acceptance
2015-03-29
Citation
Astronomy & Astrophysics, 2015, 576, pp.L17-L17
ISSN
0004-6361
Publisher
EDP Sciences
Start Page
L17
End Page
L17
Journal / Book Title
Astronomy & Astrophysics
Volume
576
Copyright Statement
© ESO, 2015
Subjects
0201 Astronomical And Space Sciences
Astronomy & Astrophysics
Publication Status
Published
Date Publish Online
2015-04-17