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J/AJ/121/1840       Galaxies in Q0835+580 and Q1126+101 fields     (Hall+, 2001)

Galaxies in the fields of z∼1.5 radio-loud quasars. Hall P.B., Sawicki M., Martini P., Finn R.A., Pritchet C.J., Osmer P.S., McCarthy D.W., Evans A.S., Lin H., Hartwick F.D.A. <Astron. J. 121, 1840 (2001)> =2001AJ....121.1840H
ADC_Keywords: Clusters, galaxy ; Photometry, UBV ; Photometry, infrared Keywords: galaxies: clusters: general - galaxies: general - quasars: individual (Q0835+580, Q1126+101, Q2149+212, Q2345+061) - infrared radiation Abstract: We have previously identified an excess population of predominantly red galaxies around a sample of 31 radio-loud quasars (RLQs) at 1<z<2. Here we show that these fields have a surface density of extremely red objects (EROs, with R-K>6) 2.7 times higher than the general field. Assuming these EROs are passively evolved galaxies at the quasar redshifts, they have characteristic luminosities of only ∼L*. Only one of four RLQ fields has an excess of J-K-selected EROs with J-K>2.5; thus, those objects are mostly unrelated to the quasars. We also present new multiwavelength data and analyses on the fields of four of these quasars at zq∼1.54, obtained to build more detailed pictures of the environments of these quasars and the galaxies within them. Objects: ------------------------------------------- RA (2000) DE Designation(s) ------------------------------------------- 08 39 06.459 +57 54 17.12 QSO 0835+580 11 29 14.19 +09 51 59.6 QSO 1126+101 ------------------------------------------- File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table4.dat 153 44 SED-fitting results
Byte-by-byte Description of file: table4.dat
Bytes Format Units Label Explanations
1- 9 A9 --- Field Field (Q0835+580 or Q1126+101) 11- 13 I3 --- [HSM2001] Identification number 15- 19 F5.1 arcsec oRA Offset in right ascension 21- 25 F5.1 arcsec oDE Offset in declination 27- 31 F5.2 mag Kmag K magnitude 33- 36 F4.2 mag e_Kmag rms uncertainty on Kmag 38 A1 --- l_r-K Limit flag on r-K 39- 42 F4.2 mag r-K r-K colour index 44- 47 F4.2 mag e_r-K rms uncertainty on r-K 49- 52 F4.2 mag J-K J-K colour index 54- 58 F5.2 mag e_J-K ? rms uncertainty on J-K 60 A1 --- l_z-J Limit flag on z-J 61- 65 F5.3 mag z-J ? z-J index 68- 71 F4.2 mag e_z-J ? rms uncertainty on z-J 73 A1 --- Model [BC] Model (1) 75- 79 F5.2 --- chi2 χ2ν value 81- 84 F4.2 --- zph Photometric redshift 86- 89 F4.2 --- E_zph Error on zph (upper limit) 91- 94 F4.2 --- e_zph Error on zph (lower limit) 96- 99 F4.2 mag E(B-V) Reddening 101-104 F4.2 mag E_E(B-V) Error on E(B-V) (upper limit) 106-109 F4.2 mag e_E(B-V) Error on E(B-V) (lower limit) 111-116 F6.3 Gyr Age Age 118-123 F6.3 Gyr E_Age Error on Age (upper limit) 124-129 F6.3 Gyr e_Age Error on Age (lower limit) 131-153 A23 --- Notes Notes
Note (1): Models: B: instantaneous burst star formation model C: continuous star formation model
History: From electronic version of the journal
(End) James Marcout, Patricia Bauer [CDS] 31-May-2001
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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