Discovery of a color-selected quasar at z=5.50
Feb, 2000
9 pages
Published in:
- Astrophys.J.Lett. 533 (2000) L75-L78
e-Print:
- astro-ph/0002338 [astro-ph]
DOI:
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Abstract: (arXiv)
We present observations of RD J030117+002025, a quasar at z=5.50 discovered from deep, multi-color, ground-based observations covering 74 square arcmin. This is the most distant quasar or AGN currently known. The object was targeted as an R-band dropout, with R(AB)>26.3 (3-sigma limit in a 3 arcsec diameter region), I(AB)=23.8, and z(AB)=23.4. The Keck/LRIS spectrum shows broad Lyman-alpha/NV emission and sharp absorption decrements from the highly-redshifted hydrogen forests. The fractional continuum depression due to the Lyman-alpha forest is D(A)=0.90. RD J030117+002025 is the least luminous, high-redshift quasar known (M(B)~-22.7).- RD J030117+002025
- EARLY UNIVERSE
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