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SHARC-II 350 micron Observations of Thermal Emission from Warm Dust in z>=5 Quasars
Ran Wang, Jeff Wagg, Chris L. Carilli +10
We present observations of four z>= SDSS quasars at 350 micron with the SHARC-II bolometer camera on the Caltech Submillimeter Observatory. These are among the deepest observations…
Observations of Dense Molecular Gas in a Quasar Host Galaxy at z=6.42: Further Evidence for a Non-Linear Dense Gas - Star Formation Relation at Early Cosmic Times
Dominik A. Riechers, Fabian Walter, Christopher L. Carilli +1
We report a sensitive search for the HCN(J=2-1) emission line towards SDSS J1148+5251 at z=6.42 with the VLA. HCN emission is a star formation indicator, tracing dense molecular hy…
Free-Floating HI Clouds in the M 81 Group
Elias Brinks, Fabian Walter, Evan D. Skillman
Recent VLA observations pointed at dwarf spheroidal (dSph) galaxies in the M 81 group reveal a hitherto hidden population of extremely low mass (~1e5 Msol) HI clouds with no obviou…
Gemini Near-infrared Spectroscopy of Luminous z~6 Quasars: Chemical Abundances, Black Hole Masses, and MgII Absorption
Linhua Jiang, Xiaohui Fan, Marianne Vestergaard +4
We present Gemini near-infrared spectroscopic observations of six luminous quasars at z=5.86.3. Five of them were observed using Gemini-South/GNIRS, which provides a simultan…
Black hole masses and enrichment of z ~ 6 SDSS quasars
Jaron D. Kurk, Fabian Walter, Xiaohui Fan +7
We present sensitive near-infrared spectroscopic observations for a sample of five z ~ 6 quasars. These are amongst the most distant, currently known quasars in the universe. The s…
High Sensitivity Array Observations of the QSO BRI 1335-0417
E. Momjian, C. L. Carilli, D. A. Riechers +1
We present sensitive phase-referenced VLBI results on the radio continuum emission from the QSO BRI 1335--0417. The observations were carried out at 1.4 GHz using the High…