Curtin University Homepage
  • Library
  • Help
    • Admin

    espace - Curtin’s institutional repository

    JavaScript is disabled for your browser. Some features of this site may not work without it.
    View Item 
    • espace Home
    • espace
    • Curtin Research Publications
    • View Item
    • espace Home
    • espace
    • Curtin Research Publications
    • View Item

    A census of baryons in the Universe from localized fast radio bursts

    91383.pdf (3.592Mb)
    Access Status
    Open access
    Authors
    Macquart, Jean-Pierre
    Prochaska, J.X.
    McQuinn, M.
    Bannister, K.W.
    Bhandari, S.
    Day, C.K.
    Deller, A.T.
    Ekers, Ronald
    James, Clancy
    Marnoch, L.
    Osłowski, S.
    Phillips, C.
    Ryder, S.D.
    Scott, D.R.
    Shannon, Ryan
    Tejos, N.
    Date
    2020
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Macquart, J.P. and Prochaska, J.X. and McQuinn, M. and Bannister, K.W. and Bhandari, S. and Day, C.K. and Deller, A.T. et al. 2020. A census of baryons in the Universe from localized fast radio bursts. Nature. 581 (7809): pp. 391-395.
    Source Title
    Nature
    DOI
    10.1038/s41586-020-2300-2
    ISSN
    0028-0836
    Faculty
    Faculty of Science and Engineering
    School
    School of Elec Eng, Comp and Math Sci (EECMS)
    Funding and Sponsorship
    http://purl.org/au-research/grants/arc/DP180100857
    http://purl.org/au-research/grants/arc/FT150100415
    http://purl.org/au-research/grants/arc/FL150100148
    http://purl.org/au-research/grants/arc/CE170100004
    URI
    http://hdl.handle.net/20.500.11937/91559
    Collection
    • Curtin Research Publications
    Abstract

    More than three-quarters of the baryonic content of the Universe resides in a highly diffuse state that is difficult to detect, with only a small fraction directly observed in galaxies and galaxy clusters1,2. Censuses of the nearby Universe have used absorption line spectroscopy3,4 to observe the ‘invisible’ baryons, but these measurements rely on large and uncertain corrections and are insensitive to most of the Universe’s volume and probably most of its mass. In particular, quasar spectroscopy is sensitive either to the very small amounts of hydrogen that exist in the atomic state, or to highly ionized and enriched gas4–6 in denser regions near galaxies7. Other techniques to observe these invisible baryons also have limitations; Sunyaev–Zel’dovich analyses8,9 can provide evidence from gas within filamentary structures, and studies of X-ray emission are most sensitive to gas near galaxy clusters9,10. Here we report a measurement of the baryon content of the Universe using the dispersion of a sample of localized fast radio bursts; this technique determines the electron column density along each line of sight and accounts for every ionized baryon11–13. We augment the sample of reported arcsecond-localized14–18 fast radio bursts with four new localizations in host galaxies that have measured redshifts of 0.291, 0.118, 0.378 and 0.522. This completes a sample sufficiently large to account for dispersion variations along the lines of sight and in the host-galaxy environments11, and we derive a cosmic baryon density of Ωb=0.051−0.025+0.021h70−1 (95 per cent confidence; h70 = H0/(70 km s−1 Mpc−1) and H0 is Hubble’s constant). This independent measurement is consistent with values derived from the cosmic microwave background and from Big Bang nucleosynthesis19,20.

    Related items

    Showing items related by title, author, creator and subject.

    • Dissecting the Local Environment of FRB 190608 in the Spiral Arm of its Host Galaxy
      Chittidi, J.S.; Simha, S.; Mannings, A.; Prochaska, J.X.; Ryder, S.D.; Rafelski, M.; Neeleman, M.; Macquart, Jean-Pierre ; Tejos, N.; Jorgenson, R.A.; Day, C.K.; Marnoch, L.; Bhandari, S.; Deller, A.T.; Qiu, H.; Bannister, K.W.; Shannon, Ryan ; Heintz, K.E. (2021)
      We present a high-resolution analysis of the host galaxy of fast radio burst (FRB) 190608, an SB(r)c galaxy at z = 0.11778 (hereafter HG 190608), to dissect its local environment and its contributions to the FRB properties. ...
    • A single fast radio burst localized to a massive galaxy at cosmological distance
      Bannister, K.W.; Deller, A.T.; Phillips, C.; Macquart, Jean-Pierre ; Prochaska, J.X.; Tejos, N.; Ryder, S.D.; Sadler, E.M.; Shannon, Ryan ; Simha, S.; Day, C.K.; McQuinn, M.; North-Hickey, F.O.; Bhandari, S.; Arcus, W.R.; Bennert, V.N.; Burchett, J.; Bouwhuis, M.; Dodson, R.; Ekers, Ronald ; Farah, W.; Flynn, C.; James, Clancy ; Kerr, M.; Lenc, E.; Mahony, E.K.; O'Meara, J.; Osłowski, S.; Qiu, H.; Treu, T.; U, V.; Bateman, T.J.; Bock, D.C.J.; Bolton, R.J.; Brown, A.; Bunton, J.D.; Chippendale, A.P.; Cooray, F.R.; Cornwell, T.; Gupta, N.; Hayman, D.B.; Kesteven, M.; Koribalski, B.S.; MacLeod, A.; McClure-Griffiths, N.M.; Neuhold, S.; Norris, R.P.; Pilawa, M.A.; Qiao, R.Y.; Reynolds, J.; Roxby, D.N.; Shimwell, T.W.; Voronkov, M.A.; Wilson, C.D. (2019)
      Fast radio bursts (FRBs) are brief radio emissions from distant astronomical sources. Some are known to repeat, but most are single bursts. Nonrepeating FRB observations have had insufficient positional accuracy to localize ...
    • Constraining the 21 cm brightness temperature of the IGM at z = 6.6 around LAEs with the murchison widefield array
      Trott, Cathryn ; Jordan, Chris ; Line, J.L.B.; Lynch, Christene ; Yoshiura, S.; McKinley, Ben ; Dayal, P.; Pindor, B.; Hutter, A.; Takahashi, K.; Wayth, Randall ; Barry, Nichole ; Beardsley, A.; Bowman, J.; Byrne, R.; Chokshi, A.; Greig, B.; Hasegawa, K.; Hazelton, B.J.; Howard, E.; Jacobs, D.; Kolopanis, M.; Mitchell, D.A.; Morales, M.F.; Murray, Steven ; Pober, J.C.; Rahimi, M.; Tingay, Steven ; Webster, R.L.; Wilensky, M.; Wyithe, J.S.B.; Zheng, Q. (2021)
      The locations of Ly α-emitting galaxies (LAEs) at the end of the Epoch of Reionization (EoR) are expected to correlate with regions of ionized hydrogen, traced by the redshifted 21 cm hyperfine line. Mapping the neutral ...
    Advanced search

    Browse

    Communities & CollectionsIssue DateAuthorTitleSubjectDocument TypeThis CollectionIssue DateAuthorTitleSubjectDocument Type

    My Account

    Admin

    Statistics

    Most Popular ItemsStatistics by CountryMost Popular Authors

    Follow Curtin

    • 
    • 
    • 
    • 
    • 

    CRICOS Provider Code: 00301JABN: 99 143 842 569TEQSA: PRV12158

    Copyright | Disclaimer | Privacy statement | Accessibility

    Curtin would like to pay respect to the Aboriginal and Torres Strait Islander members of our community by acknowledging the traditional owners of the land on which the Perth campus is located, the Whadjuk people of the Nyungar Nation; and on our Kalgoorlie campus, the Wongutha people of the North-Eastern Goldfields.