2011ApJ...743..163L

Query : 2011ApJ...743..163L

2011ApJ...743..163L - Astrophys. J., 743, 163 (2011/December-3)

The ultraviolet-to-mid-infrared spectral energy distribution of weak emission line quasars.

LANE R.A., SHEMMER O., DIAMOND-STANIC A.M., FAN X., ANDERSON S.F., BRANDT W.N., PLOTKIN R.M., RICHARDS G.T., SCHNEIDER D.P. and STRAUSS M.A.

Abstract (from CDS):

We present Spitzer Space Telescope photometry of 18 Sloan Digital Sky Survey (SDSS) quasars at 2.7 ≤ z ≤ 5.9 which have weak or undetectable high-ionization emission lines in their rest-frame ultraviolet (UV) spectra (hereafter weak-lined quasars, or WLQs). The Spitzer data are combined with SDSS spectra and ground-based, near-infrared (IR) photometry of these sources to produce a large inventory of spectral energy distributions (SEDs) of WLQs across the rest-frame ∼0.1-5 µm spectral band. The SEDs of our sources are inconsistent with those of BL Lacertae objects which are dominated by synchrotron emission due to a jet aligned close to our line of sight, but are consistent with the SED of ordinary quasars with similar luminosities and redshifts that exhibit a near-to-mid-IR "bump," characteristic of hot dust emission. This indicates that broad emission lines in WLQs are intrinsically weak, rather than suffering continuum dilution from a jet, and that such sources cannot be selected efficiently from traditional photometric surveys.

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Journal keyword(s): galaxies: active - galaxies: nuclei - infrared: galaxies - quasars: emission lines - quasars: general

Simbad objects: 42

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Number of rows : 42
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 SDSS J000552.33-000655.6 QSO 00 05 52.333 -00 06 55.65   26.37 25.36     ~ 86 0
2 QSO J0040-0915 BLL 00 40 54.6575670840 -09 15 26.833615164   26.46 22.40     ~ 59 0
3 USNO-A2.0 0750-00729793 BLL 03 17 12.2364900000 -07 58 50.326981104   18.2 18.93 18.6   ~ 29 0
4 [VV2006] J085332.8+393148 QSO 08 53 32.7773374584 +39 31 48.806624532   22.02 21.24     ~ 25 0
5 [VV2006] J103147.7+575857 QSO 10 31 47.6506095312 +57 58 58.080066204   19.82 19.56     ~ 27 0
6 [VV2006] J103628.2+585832 QSO 10 36 28.1579507904 +58 58 32.067111144   21.57 20.42     ~ 29 0
7 [VV2006] J103750.6+590131 QSO 10 37 50.5939609920 +59 01 32.101280868   24.17 22.20     ~ 29 0
8 [VV2006] J103800.5+582342 QSO 10 38 00.5042074608 +58 23 43.054386036   18.90 18.61     ~ 30 0
9 [VV2006] J103952.5+573302 QSO 10 39 52.5433433328 +57 33 03.227653404   18.81 18.55     ~ 32 0
10 [VV2006] J104018.5+572448 QSO 10 40 18.5254742280 +57 24 48.137538168   19.34 18.84     ~ 43 0
11 [VV2006] J104514.6+593707 QSO 10 45 14.6115990072 +59 37 07.345214508   19.39 19.15     ~ 30 0
12 [VV2006] J104639.4+584047 QSO 10 46 39.4287806040 +58 40 47.772729048   19.26 18.91     ~ 34 0
13 [VV2006] J104809.2+570241 QSO 10 48 09.1896730512 +57 02 42.005390604   19.06 18.71     ~ 34 0
14 [VV2006] J105036.5+580424 QSO 10 50 36.4742106264 +58 04 24.656838888   24.66 22.90     ~ 31 0
15 [VV2006] J105323.0+580411 QSO 10 53 22.9856440752 +58 04 12.126352260   26.31 23.63     ~ 35 0
16 [VV2006] J105524.5+580957 QSO 10 55 24.5665842000 +58 09 57.354437844   19.06 18.86     ~ 31 0
17 [VV2006] J105655.0+583712 QSO 10 56 54.9686440176 +58 37 12.456182892   22.05 20.95     ~ 27 0
18 [VV2006] J105715.5+573324 QSO 10 57 15.4822934208 +57 33 24.339312288   20.36 19.86     ~ 29 0
19 QSO J1058+5807 QSO 10 59 02.0514234000 +58 08 48.668376228   18.38 18.13     ~ 52 0
20 [VV2006] J110041.9+580000 QSO 11 00 41.9486219544 +58 00 01.055772900   25.44 23.34     ~ 29 0
21 3XMM J114153.3+021924 BLL 11 41 53.3433799320 +02 19 24.332806200   19.91 18.97     ~ 44 0
22 [VV2006] J120715.4+595343 QSO 12 07 15.4597 +59 53 42.923   24.47 22.91     ~ 24 0
23 SDSS J121221.56+534128.0 BLL 12 12 21.5596202040 +53 41 27.903506676   19.36 18.80     ~ 39 0
24 SDSS J123743.05+630145.1 BLL 12 37 43.0846910328 +63 01 44.856023412   20.70 19.49     ~ 47 0
25 [VV2006] J130216.2+003031 QSO 13 02 16.1351008824 +00 30 32.144356404   23.63 22.10     ~ 41 0
26 [VV2006] J130332.5+621859 QSO 13 03 32.4201012768 +62 19 00.260780664   25.06 22.90     ~ 25 0
27 SDSS J133219.65+622715.9 BLL 13 32 19.6682913144 +62 27 15.938940960   19.88 19.35     ~ 32 0
28 [VV2006] J133422.6+475033 QSO 13 34 22.6375160520 +47 50 33.494162712   25.50 23.02     ~ 35 0
29 QSO J1335+3533 QSO 13 35 50.809 +35 33 15.80   23.29 22.22     ~ 58 0
30 [VV2006] J135249.8-031354 QSO 13 52 49.8155545104 -03 13 54.229667808   24.58 22.74     ~ 26 0
31 [VV2006] J140300.2+432805 QSO 14 03 00.2302615296 +43 28 05.434694040   24.77 22.78     ~ 27 0
32 QSO J1408+0205 QSO 14 08 50.9138577456 +02 05 22.680293784   20.55 19.75     ~ 37 0
33 [VV2006] J144231.7+011055 QSO 14 42 31.7221836498 +01 10 55.413109732   23.45 22.04     ~ 38 0
34 QSO J1532-0039 QSO 15 32 59.9585073048 -00 39 43.819557948   23.88 22.26     ~ 33 0
35 [VV2006] J154734.9+444652 QSO 15 47 34.9469425464 +44 46 52.465027764   24.11 22.66     ~ 26 0
36 [VV2006] J161238.3+532254 QSO 16 12 38.2742626728 +53 22 55.033757688   18.20 18.03     ~ 37 0
37 QSO J1640+4115 QSO 16 40 22.7868381552 +41 15 48.175537788 20.28 19.86 19.49     ~ 34 0
38 QSO B1639+4042 QSO 16 41 05.3527848936 +40 36 51.803125200   19.05 18.86     ~ 36 0
39 [VV2006] J164238.1+412104 QSO 16 42 38.0900293488 +41 21 04.763113704   19.83 19.61     ~ 28 0
40 [VV2006] J171652.4+590200 QSO 17 16 52.3479513960 +59 02 00.217049676   19.38 19.04     ~ 29 0
41 [VV2006] J172358.1+601140 QSO 17 23 58.0019364624 +60 11 40.008987600   19.56 19.17     ~ 26 0
42 PHL 1811 Sy1 21 55 01.5124437432 -09 22 24.349496808   13.9 16.8 14.1   ~ 200 1

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