HI detections of the Cosmic Web

Details HI detections of the Cosmic Web HI detections of the Cosmic Web

Apr 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010atnf.prop.3225p&link_type=abstract

ATNF proposal C2351, Semester: April, 2010

Mathematics

Logic

Cosmology, Atca

Scientific paper

Numerical simulations predict that galaxies and clusters in the Local Volume are connected by extended diffuse filaments of gas. Although most of this gas is ionised, the peaks of this Cosmic Web should be detectable in HI 21cm emission at column densities that probe those of Lyman Limit systems. In a previous work we have defined a list of HI detections that can possibly be linked to the Cosmic Web. We propose to do follow-up observations with the ATCA in the two most compact configurations, to get high signal to noise confirmations and to improve our understanding of the distribution of diffuse systems. These observations will allow us to make statements about the physical properties of diffuse gas. This can help us to answer important questions related to structure formation (e.g. gas accretion) and the cosmological model we have.

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