Galaxy Formation and Evolution Probed with Lyman-α blobs

Details Galaxy Formation and Evolution Probed with Lyman-α blobs Galaxy Formation and Evolution Probed with Lyman-α blobs

Oct 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008aspc..399..280s&link_type=abstract

Panoramic Views of Galaxy Formation and Evolution ASP Conference Series, Vol. 399, proceedings of the conference held 11-16 Dece

Astronomy and Astrophysics

Astronomy

Scientific paper

Spatially extended Lyman-α sources that are faint and/or compact in ultraviolet continuum (Lyman-α blobs, LABs) are excellent probes for very early phases of galaxy formation. We have carried out an unbiased survey with Subaru/Suprime-Cam and seven intermediate-band filters, covering z˜ 3-5. We have constructed a sample of 41 LABs, proving that they are common in the early universe. Follow-up spectroscopy with VLT/VIMOS suggests that some fraction of our LABs are likely to be ordinary starbursts (˜ 50%) or superwind galaxies (˜ 30%). Excluding these sources, ˜ 40% of our spectroscopic sample clearly shows positive correlation between the Lyman-α luminosity and the velocity width. These results suggests that our sample may contain a large number of proto-galaxies in the very first stage of their assembly.

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