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Author
dc.contributor.author
Schneider, D P 
Author
dc.contributor.author
Fan, X H 
Author
dc.contributor.author
Strauss, M A 
Author
dc.contributor.author
Gunn, J E 
Author
dc.contributor.author
Richards, G T 
Author
dc.contributor.author
Knapp, G R 
Author
dc.contributor.author
Lupton, R H 
Author
dc.contributor.author
Saxe, D H 
Author
dc.contributor.author
Anderson, J E 
Author
dc.contributor.author
Bahcall, N A 
Availability Date
dc.date.accessioned
2020-08-08T19:56:09Z
Availability Date
dc.date.available
2020-08-08T19:56:09Z
Release
dc.date.issued
2000
uri
dc.identifier.uri
http://hdl.handle.net/10831/49176
Abstract
dc.description.abstract
We report the discovery of a pair of z = 4.25 quasars with a separation of 33 ". The brighter of the two objects was identified as a high-redshift quasar candidate from Sloan Digital Sky Survey multicolor imaging data, and the redshift was measured from a spectrum obtained with the Hobby-Eberly Telescope. The slit orientation of this observation by chance included another quasar, approximately 1 mag fainter and having the same redshift as the target. This is the third serendipitous discovery of a z > 4 quasar. The differences in the relative strengths and profiles of the emission lines suggest that this is a quasar pair and not a gravitational lens. The two objects are likely to be physically associated; the projected physical separation is approximately 210 h(50)(-1) kpc and the redshifts are identical to approximate to0.01, implying a radial physical separation of 950 h(50)(-1) kpc or less. The existence of this pair is strong circumstantial evidence that z similar to 4 quasars are clustered.
Language
dc.language
Angol
Title
dc.title
Discovery of a pair of z=4.25 quasars from the Sloan Digital Sky Survey
Type
dc.type
folyóiratcikk
Date Change
dc.date.updated
2020-06-05T10:18:18Z
Scope
dc.format.page
2183-2189
Doi ID
dc.identifier.doi
10.1086/316834
Wos ID
dc.identifier.wos
000165095200001
ID Scopus
dc.identifier.scopus
0003122871
MTMT ID
dc.identifier.mtmt
1064412
Issue Number
dc.identifier.issue
5
abbreviated journal
dc.identifier.jabbrev
ASTRON J
Journal
dc.identifier.jtitle
ASTRONOMICAL JOURNAL
Volume Number
dc.identifier.volume
120
Release Date
dc.description.issuedate
2000
department of Author
dc.contributor.institution
Komplex Rendszerek Fizikája Tanszék
Author institution
dc.contributor.department
Komplex Rendszerek Fizikája Tanszék


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Discovery of a pair of z=4.25 quasars from the Sloan Digital Sky Survey
 

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