Abstract
We present an investigation of the environment (≈600 kpc radius) of a pair of luminous z = 4.25 quasars, SDSS J1439-0034A and B, separated by 33″. An analysis of high-quality Subaru spectra of the quasars suggests that this configuration is indeed a physical pair and not a gravitational lens; the redshifts are slightly different (although marginally consistent with being the same), and the two spectra have strikingly different features. We search for bright galaxies (L ≳ 0.4L*) having similar redshifts using the V dropout technique and semi-narrowband imaging looking for strong Lyα emission. We find no enhancement in the galaxy density around the quasar pair; its environment differs very little from a general field, with the upper limit of the density enhancement being about 3.5 at a 90% confidence. We infer that bright quasars happened to appear in two normal galaxies in a general field.
| Original language | English |
|---|---|
| Journal | Astrophysical Journal |
| Volume | 603 |
| Issue number | 2 II |
| Publication status | Published - 2004 Mar 10 |
| Externally published | Yes |
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Keywords
- Large-scale structure of universe
- Quasars: individual
ASJC Scopus subject areas
- Space and Planetary Science
Cite this
The search for galaxy clustering around a quasar pair at z = 4.25 found in the sloan digital sky survey. / Fukugita, Masataka; Nakamura, Osamu; Schneider, Donald P.; Doi, Mamoru; Kashikawa, Nobunari.
In: Astrophysical Journal, Vol. 603, No. 2 II, 10.03.2004.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - The search for galaxy clustering around a quasar pair at z = 4.25 found in the sloan digital sky survey
AU - Fukugita, Masataka
AU - Nakamura, Osamu
AU - Schneider, Donald P.
AU - Doi, Mamoru
AU - Kashikawa, Nobunari
PY - 2004/3/10
Y1 - 2004/3/10
N2 - We present an investigation of the environment (≈600 kpc radius) of a pair of luminous z = 4.25 quasars, SDSS J1439-0034A and B, separated by 33″. An analysis of high-quality Subaru spectra of the quasars suggests that this configuration is indeed a physical pair and not a gravitational lens; the redshifts are slightly different (although marginally consistent with being the same), and the two spectra have strikingly different features. We search for bright galaxies (L ≳ 0.4L*) having similar redshifts using the V dropout technique and semi-narrowband imaging looking for strong Lyα emission. We find no enhancement in the galaxy density around the quasar pair; its environment differs very little from a general field, with the upper limit of the density enhancement being about 3.5 at a 90% confidence. We infer that bright quasars happened to appear in two normal galaxies in a general field.
AB - We present an investigation of the environment (≈600 kpc radius) of a pair of luminous z = 4.25 quasars, SDSS J1439-0034A and B, separated by 33″. An analysis of high-quality Subaru spectra of the quasars suggests that this configuration is indeed a physical pair and not a gravitational lens; the redshifts are slightly different (although marginally consistent with being the same), and the two spectra have strikingly different features. We search for bright galaxies (L ≳ 0.4L*) having similar redshifts using the V dropout technique and semi-narrowband imaging looking for strong Lyα emission. We find no enhancement in the galaxy density around the quasar pair; its environment differs very little from a general field, with the upper limit of the density enhancement being about 3.5 at a 90% confidence. We infer that bright quasars happened to appear in two normal galaxies in a general field.
KW - Large-scale structure of universe
KW - Quasars: individual
UR - http://www.scopus.com/inward/record.url?scp=2142713909&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=2142713909&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:2142713909
VL - 603
JO - Astrophysical Journal
JF - Astrophysical Journal
SN - 0004-637X
IS - 2 II
ER -