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Cited by 773

The DOI matches its Crossref record; 35 of the 35 references it cites were found in a registry or an index.

A Survey of [CLC][ITAL]z[/ITAL][/CLC] ] 5.7 Quasars in the Sloan Digital Sky Survey. II. Discovery of Three Additional Quasars at [CLC][ITAL]z[/ITAL][/CLC] ] 6

Open access
Fan, Xiaohui, Strauss, Michael A., Schneider, Donald P., Becker, Robert H., White, Richard L., Haiman, Zoltán, Gregg, Michael, Pentericci, Laura, Grebel, Eva K., Narayanan, Vijay K., Loh, Yeong-Shang, Richards, Gordon T., Gunn, James E., Lupton, Robert H., Knapp, Gillian R., Ivezić, Željko, Brandt, W. N., Collinge, Matthew, Hao, Lei, Harbeck, Daniel, Prada, Francisco, Schaye, Joop, Strateva, Iskra, Zakamska, Nadia, Anderson, Scott, Brinkmann, Jon, Bahcall, Neta A., Lamb, Don Q., Okamura, Sadanori, Szalay, Alex, York, Donald G.·2003·The Astronomical Journal
DOI 10.1086/368246
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Abstract

We present the discovery of three new quasars at z > 6 in ∼ 1300 deg 2 of Sloan Digital Sky Survey imaging data, J114816.64+525150.3 ( z = 6.43), J104845.05+463718.3 ( z = 6.23), and J163033.90+401209.6 ( z = 6.05). The first two objects have weak Lyα emission lines; their redshifts are determined from the positions of the Lyman break. They are only accurate to ∼0.05 and could be affected by the presence of broad absorption line systems. The last object has a Lyα strength more typical of lower redshift quasars. Based on a sample of six quasars at z > 5.7 that cover 2870 deg 2 presented in this paper and in Paper I, we estimate the comoving density of luminous quasars at z ∼ 6 and M 1450 < -26.8 to be (8 ± 3) × 10 -10 Mpc -3 (for H 0 = 50 km s -1 Mpc -1 , Ω = 1). Hubble Space Telescope imaging of two z > 5.7 quasars and high-resolution, ground-based images (seeing ∼0 4) of three additional z > 5.7 quasars show that none of them is gravitationally lensed. The luminosity distribution of the high-redshift quasar sample suggests the bright-end slope of the quasar luminosity function at z ∼ 6 is shallower than Ψ ∝ L -3.5 (2 σ), consistent with the absence of strongly lensed objects.

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Metadata

Authors
Fan, X., Strauss, M. A., Schneider, D. P., Becker, R. H., White, R. L., Haiman, Z., Gregg, M., Pentericci, L., Grebel, E. K., Narayanan, V. K., Loh, Y.-S., Richards, G. T., Gunn, J. E., Lupton, R. H., Knapp, G. R., Ivezić, Ž., Brandt, W. N., Collinge, M., Hao, L., Harbeck, D., Prada, F., Schaye, J., Strateva, I., Zakamska, N., Anderson, S., Brinkmann, J., Bahcall, N. A., Lamb, D. Q., Okamura, S., Szalay, A., & York, D. G.
Venue
The Astronomical Journal
Publisher
American Astronomical Society
Published
2003-04
Volume
125
Issue
4
Pages
1649-1659
ISSN
  • 0004-6256 (ISSN-L)
  • 1538-3881
DOI
10.1086/368246
OpenAlex
W1613124003
Cited by
773
References
35
FWCI
50.45
Type
journal article
Language
en
Open access
bronze

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