Astronomy and Astrophysics – Astrophysics
Scientific paper
May 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005assl..329..327w&link_type=abstract
Starbursts: From 30 Doradus to Lyman Break Galaxies, Held in Cambridge, UK, 6-10 September 2004. Edited by R. de Grijs and R.M.
Astronomy and Astrophysics
Astrophysics
Scientific paper
We present high-resolution VLA observations of the molecular gas in the host galaxy of the highest-redshift quasar currently known, SDSS J1148+5251 (z=6.42). Our VLA data of the CO(3--2) emission have a maximum resolution of 0.17×0.13 arcsec2 (≤1 kpc2), and enable us to resolve the molecular gas emission both spatially and in velocity. The molecular gas in J1148+5251 is extended to a radius of 2.5 kpc, and the central region shows 2 peaks, separated by 0.3 arcsec (1.7 kpc). Assuming that the molecular gas is gravitationally bound, we estimate a dynamical mass of ˜ 4.5 × 1010 M&sun; within a radius of 2.5 kpc. This dynamical mass estimate leaves little room for matter other than the detected molecular gas, and -- in particular -- the data are inconsistent with a ˜1012 M&sun; stellar bulge, which would be predicted based on the MBH-σbulge relation.
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