Filamentary large-scale structure traced by six Lyα blobs at z = 2.3

Dawn K. Erb, Milan Bogosavljević, Charles C. Steidel

Research output: Contribution to journalArticlepeer-review


Extended nebulae of Lyα emission ("Lyα blobs") are known to be associated with overdense regions at high redshift. Here we present six large Lyα blobs in a previously known protocluster with galaxy overdensity δ 7 at z = 2.3; this is the richest field of giant Lyα blobs detected to date. The blobs have linear sizes of ≳ 100kpc and Lyα luminosities of 1043ergs-1. The positions of the blobs define two linear filaments with an extent of at least 12 comovingMpc; these filaments intersect at the center of one of the blobs. Measurement of the position angles of the blobs indicates that five of the six are aligned with these filaments to within 10°, suggesting a connection between the physical processes powering extended Lyα emission and those driving structure on larger scales.

Original languageEnglish (US)
Article numberL31
JournalAstrophysical Journal Letters
Issue number1
StatePublished - Oct 10 2011


  • galaxies: evolution
  • galaxies: formation
  • galaxies: high-redshift
  • large-scale structure of universe

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science


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