Measuring the cosmic bulk flow with 6dFGSv

Christina Magoulas, Christopher Springob, Matthew Colless, Jeremy Mould, John Lucey, Pirin Erdoǧdu, D Heath Jones

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearch

Abstract

While recent years have seen rapid growth in the number of galaxy peculiar velocity measurements, disagreements remain about the extent to which the peculiar velocity field - a tracer of the large-scale distribution of mass - agrees with both ΛCDM expectations and with velocity field models derived from redshift surveys. The 6dF Galaxy Survey includes peculiar velocities for nearly 9 000 early-type galaxies (6dFGSv), making it the largest and most homogeneous galaxy peculiar velocity sample to date. We have used the 6dFGS velocity field to determine the amplitude and scale of large-scale cosmic flows in the local universe and test standard cosmological models. We also compare the galaxy density and peculiar velocity fields to establish the distribution of dark and luminous matter and better constrain key cosmological parameters such as the redshift-space distortion parameter.

Original languageEnglish
Title of host publicationProceedings of the 308th Symposium of the International Astronomical Union
Subtitle of host publicationThe Zeldovich Universe: Genesis and Growth of the Cosmic Web
EditorsRien van de Weygaert, Sergei Shandarin, Enn Saar, Jaan Einasto
Place of PublicationCambridge UK
PublisherCambridge University Press
Pages336-339
Number of pages4
ISBN (Print)9781107078604
DOIs
Publication statusPublished - 2016
EventThe Zeldovich Universe: Genesis and Growth of the Cosmic Web - Tallinn University Conference Centre, Talinn, Estonia
Duration: 23 Jun 201428 Jun 2014
https://web.archive.org/web/20140419194514/http://iau.maido.ee/

Publication series

NameIAU Symposium Proceedings Series
PublisherCambridge University Press
ISSN (Print)1743-9213

Conference

ConferenceThe Zeldovich Universe
Abbreviated titleIAU Symposium 308
CountryEstonia
CityTalinn
Period23/06/1428/06/14
Internet address

Keywords

  • cosmology: observations - distance scale - large-scale structure of universe
  • galaxies: distances and redshifts

Cite this

Magoulas, C., Springob, C., Colless, M., Mould, J., Lucey, J., Erdoǧdu, P., & Jones, D. H. (2016). Measuring the cosmic bulk flow with 6dFGSv. In R. van de Weygaert, S. Shandarin, E. Saar, & J. Einasto (Eds.), Proceedings of the 308th Symposium of the International Astronomical Union: The Zeldovich Universe: Genesis and Growth of the Cosmic Web (pp. 336-339). (IAU Symposium Proceedings Series). Cambridge University Press. https://doi.org/10.1017/S1743921316010115