A Tentative Detection of [C II] Line Emission in the z=4.7 QSO BR1202-0725

Details A Tentative Detection of [C II] Line Emission in the z=4.7 QSO BR1202-0725 A Tentative Detection of [C II] Line Emission in the z=4.7 QSO BR1202-0725

Oct 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aspc..375..246i&link_type=abstract

From Z-Machines to ALMA: (Sub)Millimeter Spectroscopy of Galaxies ASP Conference Series, Vol. 375, proceedings of the conference

Astronomy and Astrophysics

Astronomy

Scientific paper

Our new SMA ˜ 3'' resolution 900 μm image of the z=4.7 QSO BR1202-0725 shows two submillimeter continuum components, consistent with previously published mm images. We further tentatively detect the redshifted [C II] line emission from the northern component BR1202N. The derived [C II]-to-FIR luminosity ratio (0.03%) is comparable to the ratios found in local ULIRGs. In addition, by analyzing archival Chandra data, we detect X-ray emission in both submm components. We conclude that BR1202-0725 is likely a pair of AGN host galaxies at z = 4.7, with both galaxies forming stars at exceedingly high rates.

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