Maximum-likelihood fitting of the 6dFGS peculiar velocities

Christina Magoulas; Christopher Springob; Matthew Colless; D. Heath Jones; Lachlan Campbell; John Lucey; Jeremy Mould

doi:10.1017/S1743921312021813

Maximum-likelihood fitting of the 6dFGS peculiar velocities

Christina Magoulas, Christopher Springob, Matthew Colless, D. Heath Jones, Lachlan Campbell, John Lucey, Jeremy Mould

Research output: Chapter in Book/Report/Conference proceeding › Conference proceeding contribution › peer-review

Abstract

We develop a robust Bayesian model to derive peculiar velocities and Fundamental Plane (FP) distances for a subsample of 9000 galaxies from the 6dF Galaxy Survey (6dFGS). These galaxies form the basis of 6dFGSv, the largest and most uniform galaxy peculiar-velocity sample to date. We perform a Bayesian analysis of the data set as a whole, determining cosmological parameters from the peculiar-velocity field (e.g., fitting β and the bulk flow), by comparing to the field predicted from the redshift survey and assuming that the galaxy distribution traces the matter distribution.

Original language	English
Title of host publication	Advancing the physics of cosmic distances
Subtitle of host publication	proceedings of the 289th symposium of the International Astronomical Union held in Beijing, China, August 27 - 31, 2012
Editors	Richard de Grijs
Place of Publication	Cambridge, United Kingdom
Publisher	Cambridge University Press (CUP)
Pages	402-405
Number of pages	4
ISBN (Print)	9781107033788
DOIs	https://doi.org/10.1017/S1743921312021813
Publication status	Published - 2012
Externally published	Yes
Event	International Astronomical Union Symposium (289th : 2012) - Beijing, China Duration: 27 Aug 2012 → 31 Aug 2012

Publication series

Name	Proceedings of the International Astronomincal Union
Publisher	Cambridge University Press
ISSN (Print)	1743-9213

Conference

Conference	International Astronomical Union Symposium (289th : 2012)
City	Beijing, China
Period	27/08/12 → 31/08/12

Keywords

surveys
galaxies: distances and redshifts
cosmological parameters
large-scale structure of universe

Access to Document

10.1017/S1743921312021813

Cite this

Magoulas, C., Springob, C., Colless, M., Jones, D. H., Campbell, L., Lucey, J., & Mould, J. (2012). Maximum-likelihood fitting of the 6dFGS peculiar velocities. In R. de Grijs (Ed.), Advancing the physics of cosmic distances: proceedings of the 289th symposium of the International Astronomical Union held in Beijing, China, August 27 - 31, 2012 (pp. 402-405). (Proceedings of the International Astronomincal Union). Cambridge University Press (CUP). https://doi.org/10.1017/S1743921312021813

Magoulas, Christina ; Springob, Christopher ; Colless, Matthew et al. / Maximum-likelihood fitting of the 6dFGS peculiar velocities. Advancing the physics of cosmic distances: proceedings of the 289th symposium of the International Astronomical Union held in Beijing, China, August 27 - 31, 2012. editor / Richard de Grijs. Cambridge, United Kingdom : Cambridge University Press (CUP), 2012. pp. 402-405 (Proceedings of the International Astronomincal Union).

@inproceedings{e689cf7461d94fb0a0ed5601758227b4,

title = "Maximum-likelihood fitting of the 6dFGS peculiar velocities",

abstract = "We develop a robust Bayesian model to derive peculiar velocities and Fundamental Plane (FP) distances for a subsample of 9000 galaxies from the 6dF Galaxy Survey (6dFGS). These galaxies form the basis of 6dFGSv, the largest and most uniform galaxy peculiar-velocity sample to date. We perform a Bayesian analysis of the data set as a whole, determining cosmological parameters from the peculiar-velocity field (e.g., fitting β and the bulk flow), by comparing to the field predicted from the redshift survey and assuming that the galaxy distribution traces the matter distribution.",

keywords = "surveys, galaxies: distances and redshifts, cosmological parameters, large-scale structure of universe",

author = "Christina Magoulas and Christopher Springob and Matthew Colless and Jones, {D. Heath} and Lachlan Campbell and John Lucey and Jeremy Mould",

year = "2012",

doi = "10.1017/S1743921312021813",

language = "English",

isbn = "9781107033788",

series = "Proceedings of the International Astronomincal Union",

publisher = "Cambridge University Press (CUP)",

pages = "402--405",

editor = "{de Grijs}, Richard",

booktitle = "Advancing the physics of cosmic distances",

address = "United Kingdom",

note = "International Astronomical Union Symposium (289th : 2012) ; Conference date: 27-08-2012 Through 31-08-2012",

}

Magoulas, C, Springob, C, Colless, M, Jones, DH, Campbell, L, Lucey, J & Mould, J 2012, Maximum-likelihood fitting of the 6dFGS peculiar velocities. in R de Grijs (ed.), Advancing the physics of cosmic distances: proceedings of the 289th symposium of the International Astronomical Union held in Beijing, China, August 27 - 31, 2012. Proceedings of the International Astronomincal Union, Cambridge University Press (CUP), Cambridge, United Kingdom, pp. 402-405, International Astronomical Union Symposium (289th : 2012), Beijing, China, 27/08/12. https://doi.org/10.1017/S1743921312021813

Maximum-likelihood fitting of the 6dFGS peculiar velocities. / Magoulas, Christina; Springob, Christopher; Colless, Matthew et al.
Advancing the physics of cosmic distances: proceedings of the 289th symposium of the International Astronomical Union held in Beijing, China, August 27 - 31, 2012. ed. / Richard de Grijs. Cambridge, United Kingdom: Cambridge University Press (CUP), 2012. p. 402-405 (Proceedings of the International Astronomincal Union).

Research output: Chapter in Book/Report/Conference proceeding › Conference proceeding contribution › peer-review

TY - GEN

T1 - Maximum-likelihood fitting of the 6dFGS peculiar velocities

AU - Magoulas, Christina

AU - Springob, Christopher

AU - Colless, Matthew

AU - Jones, D. Heath

AU - Campbell, Lachlan

AU - Lucey, John

AU - Mould, Jeremy

PY - 2012

Y1 - 2012

N2 - We develop a robust Bayesian model to derive peculiar velocities and Fundamental Plane (FP) distances for a subsample of 9000 galaxies from the 6dF Galaxy Survey (6dFGS). These galaxies form the basis of 6dFGSv, the largest and most uniform galaxy peculiar-velocity sample to date. We perform a Bayesian analysis of the data set as a whole, determining cosmological parameters from the peculiar-velocity field (e.g., fitting β and the bulk flow), by comparing to the field predicted from the redshift survey and assuming that the galaxy distribution traces the matter distribution.

AB - We develop a robust Bayesian model to derive peculiar velocities and Fundamental Plane (FP) distances for a subsample of 9000 galaxies from the 6dF Galaxy Survey (6dFGS). These galaxies form the basis of 6dFGSv, the largest and most uniform galaxy peculiar-velocity sample to date. We perform a Bayesian analysis of the data set as a whole, determining cosmological parameters from the peculiar-velocity field (e.g., fitting β and the bulk flow), by comparing to the field predicted from the redshift survey and assuming that the galaxy distribution traces the matter distribution.

KW - surveys

KW - galaxies: distances and redshifts

KW - cosmological parameters

KW - large-scale structure of universe

U2 - 10.1017/S1743921312021813

DO - 10.1017/S1743921312021813

M3 - Conference proceeding contribution

SN - 9781107033788

T3 - Proceedings of the International Astronomincal Union

SP - 402

EP - 405

BT - Advancing the physics of cosmic distances

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CY - Cambridge, United Kingdom

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ER -

Magoulas C, Springob C, Colless M, Jones DH, Campbell L, Lucey J et al. Maximum-likelihood fitting of the 6dFGS peculiar velocities. In de Grijs R, editor, Advancing the physics of cosmic distances: proceedings of the 289th symposium of the International Astronomical Union held in Beijing, China, August 27 - 31, 2012. Cambridge, United Kingdom: Cambridge University Press (CUP). 2012. p. 402-405. (Proceedings of the International Astronomincal Union). doi: 10.1017/S1743921312021813

Maximum-likelihood fitting of the 6dFGS peculiar velocities

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