2008AJ....136.1799K

Query : 2008AJ....136.1799K

2008AJ....136.1799K - Astron. J., 136, 1799-1809 (2008/November-0)

Infrared imaging of Sloan digital sky survey quasars: implications for the quasar K correction.

KENNEFICK J. and BURSICK S.

Abstract (from CDS):

We have imaged 45 quasars from the Sloan Digital Sky Survey (SDSS) with redshifts 1.85 < z < 4.26 in JHKs with the Kitt Peak National Observatory simultaneous quad infrared imaging device imager. By combining these data with optical magnitudes from the SDSS we have computed the rest-frame optical spectral indices of this sample and investigate their relation with quasar redshift. We find a mean spectral index of <αo≥-0.55±0.42 with a large spread in values. We also find possible evolution of the form αo= (0.148±0.068)z - (0.964±0.200) in the luminosity range -28.0 < Mi< -26.5. Such evolution suggests changes in the accretion process in quasars with time and is shown to have an effect on computed quasar luminosity functions.

Abstract Copyright: ∼

Journal keyword(s): galaxies: active - galaxies: evolution - quasars: general

Simbad objects: 45

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Number of rows : 45
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 [VV2006] J094745.3-004113 QSO 09 47 45.2692905336 -00 41 13.237933596   20.33 19.94     ~ 33 0
2 [VV2006] J094822.9+005554 QSO 09 48 22.9714134096 +00 55 54.394209732   23.45 21.78     ~ 29 0
3 [VV2006] J095048.5-000018 QSO 09 50 48.4830881592 -00 00 17.690565204   21.23 20.64     ~ 24 0
4 QSO J0959-0035 QSO 09 59 38.2822714752 -00 35 00.841501644   19.11 18.93     ~ 34 0
5 [VV2006] J100423.2-004042 QSO 10 04 23.2686234384 -00 40 42.863296008   19.77 19.38     ~ 30 0
6 [VV2006] J101119.9-004145 QSO 10 11 19.9438491168 -00 41 45.393836172   19.95 19.81     ~ 27 0
7 [VV2006] J102517.6+003422 QSO 10 25 17.5801592952 +00 34 22.047686508   19.03 18.83     ~ 39 0
8 LBQS 1025-0030 QSO 10 28 32.0932832112 -00 46 07.043818944   18.70 18.37     ~ 41 0
9 [VV2006] J103204.7-001121 QSO 10 32 04.7420894184 -00 11 19.114346616   19.28 19.08     ~ 31 0
10 [VV2006] J103427.5-002234 QSO 10 34 27.5719033992 -00 22 33.907361808   19.93 19.73     ~ 26 0
11 [VV2006] J104837.4-002813 QSO 10 48 37.3994154048 -00 28 13.669412124   21.28 20.16     ~ 35 0
12 [VV2006] J105254.6-000627 QSO 10 52 54.5939085888 -00 06 25.697409912   21.98 20.79     ~ 30 0
13 [VV2006] J105602.4+003221 QSO 10 56 02.3799971160 +00 32 22.085331036   22.08 20.87     ~ 35 0
14 [VV96] J105808.4+003931 QSO 10 58 08.4773631792 +00 39 30.628066644   18.86 18.60     ~ 33 0
15 [VV2006] J105902.7+010404 QSO 10 59 02.7362965368 +01 04 04.064977092   21.75 20.54     ~ 30 0
16 [VV2006] J110725.7+003354 QSO 11 07 25.7036805168 +00 33 53.938084140   19.5 19.25 19.3   ~ 30 0
17 QSO J1108-0059 QSO 11 08 13.8627331296 -00 59 44.514802644   21.33 20.30     ~ 34 0
18 [VV2006] J111224.2+004630 QSO 11 12 24.1832428680 +00 46 30.430665444   21.78 20.59     ~ 31 0
19 LBQS 1148+0055 QSO 11 51 15.3834421920 +00 38 27.060693000   18.21 18.01     ~ 55 0
20 [VV2006] J120138.6+010336 QSO 12 01 38.5627412760 +01 03 36.243889488   21.63 20.72 20.1   ~ 30 0
21 [VV2006] J121323.9+010414 QSO 12 13 23.9457308784 +01 04 14.754389124   20.89 20.60     ~ 30 0
22 [VV2006] J121531.5-004900 QSO 12 15 31.5548950824 -00 49 00.449504040   21.79 20.81     ~ 28 0
23 [VV2006] J121655.4+001414 QSO 12 16 55.3876389504 +00 14 15.353160072   18.68 18.56     ~ 29 0
24 [VV2006] J121920.2+010736 QSO 12 19 20.2665017688 +01 07 36.225013872   20.40 20.09     ~ 29 0
25 [VV2006] J121933.3+003226 QSO 12 19 33.2596911384 +00 32 26.541734604   19.87 19.71     ~ 26 0
26 [VV2000] J122600.7+005923 QSO 12 26 00.6813635640 +00 59 23.659046916   21.74 20.24     ~ 35 0
27 [VV2006] J122730.4-010445 QSO 12 27 30.3794314008 -01 04 46.073438364   19.45 19.17     ~ 29 0
28 QSO B1232-002 QSO 12 35 05.9186521656 -00 30 22.376648844   19.08 18.91     ~ 34 0
29 [VV2006] J123514.9+004740 QSO 12 35 14.9477594184 +00 47 40.671471984   20.08 19.68     ~ 29 0
30 [VV2006] J123947.7+002516 QSO 12 39 47.6118677448 +00 25 16.310880048   21.01 20.47     ~ 27 0
31 LBQS 1243+0121 QSO 12 45 51.4514622408 +01 05 05.025409332   18.43 18.26     ~ 64 0
32 [VV2006] J125241.5-002040 QSO 12 52 41.5503913536 -00 20 40.650197352   19.11 18.87     ~ 31 0
33 [VV2000] J131052.5-005533 QSO 13 10 52.5116110080 -00 55 33.122110944   21.31 19.95     ~ 42 0
34 LBQS 1308+0105 QSO 13 11 28.3562130000 +00 49 29.792075628   19.21 18.97     ~ 39 0
35 [VV2006] J132743.0+003532 QSO 13 27 42.9266603928 +00 35 32.665003692   19.21 18.95     ~ 41 0
36 LBQS 1334-0033 QSO 13 36 47.1441561024 -00 48 57.076123896   17.65 17.56     ~ 63 0
37 [VV2006] J135605.4-010024 QSO 13 56 05.4185384256 -01 00 24.429613752   19.93 19.55     ~ 28 0
38 QSO J1358+0058 QSO 13 58 28.7429028696 +00 58 11.361227268   21.10 20.17     ~ 36 0
39 [VV2006] J141015.4-001418 QSO 14 10 15.3622722144 -00 14 18.929801184   19.59 19.27     ~ 30 0
40 QSO J1413+0000 QSO 14 13 15.3675271440 +00 00 32.338894212   21.89 20.68     ~ 46 0
41 [VV2006] J143307.4+003319 QSO 14 33 07.4066820816 +00 33 19.023931008   19.45 19.31     ~ 36 0
42 [VV2006] J143641.2+001559 QSO 14 36 41.2423729464 +00 15 58.914773640   19.15 18.86     ~ 39 0
43 [VV2006] J145754.0+003638 QSO 14 57 54.0457071240 +00 36 39.004560468   19.40 19.13     ~ 33 0
44 [VV2006] J145838.1+002417 QSO 14 58 38.0477435304 +00 24 17.981440776   19.15 18.96     ~ 32 0
45 QSO J1506+0018 QSO 15 06 11.2290462096 +00 18 23.615863776   19.33 19.08     ~ 25 0

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