2006ApJ...646..801G


Query : 2006ApJ...646..801G

2006ApJ...646..801G - Astrophys. J., 646, 801-814 (2006/August-1)

A sample of low-redshift BL Lacertae objects. II. EVN and MERLIN data and multiwavelength analysis.

GIROLETTI M., GIOVANNINI G., TAYLOR G.B. and FALOMO R.

Abstract (from CDS):

We present new radio observations of 9 members of a sample of 29 nearby (z<0.2) BL Lac objects. The new data have been obtained with the European VLBI Network and/or MERLIN at 1.6 and 5 GHz and complement previous observations. For one object, the TeV source Mrk 421, we also present deep multiepoch VLBA and global VLBI data, which reveal a resolved diffuse jet with clear signatures of limb brightening. We use the new and old data to estimate physical parameters of the jets of the sample from which the subset with new radio data is drawn. We derive Doppler factors in the parsec-scale radio jet in the range 2≲δ≲9. Using HST data, we separate the contribution of the host galaxy from that of the active core. From the measured and debeamed observables, we find a weak correlation between radio power and black hole mass, and a tight correlation between radio and optical core luminosities. We interpret this result in terms of a common synchrotron origin, with little contribution from a radiatively efficient accretion disk. The BL Lac objects in our sample have debeamed properties similar to low-power radio galaxies, including the fundamental plane of black hole activity.

Abstract Copyright:

Journal keyword(s): Galaxies: BL Lacertae Objects: General - Galaxies: Active - Galaxies: Jets - Galaxies: Nuclei - Radio Continuum: Galaxies

Simbad objects: 31

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Number of rows : 31
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 QSO B0145+138 BLL 01 48 29.7013033536 +14 02 17.848330656     17.90 16.7   ~ 45 0
2 QSO B0229+200 BLL 02 32 48.6148874688 +20 17 17.486717388   18.0 18.00     ~ 290 3
3 QSO B0347-121 BLL 03 49 23.1862105584 -11 59 27.366035532   18.74 18.2 17.46   ~ 204 0
4 QSO B0350-3712 BLL 03 51 54.5527158480 -37 03 44.193747492     17.0 16.4   ~ 41 0
5 QSO B0521-365 BLL 05 22 57.9841341216 -36 27 30.847204512   15.26 14.62 14.48   ~ 782 2
6 QSO B0548-322 BLL 05 50 40.5705144672 -32 16 16.484718648   16.07 15.5     ~ 386 1
7 6C 070609+591309 BLL 07 10 30.0683697888 +59 08 20.371772544   17.38 16.52 15.1   ~ 202 2
8 7C 080602.89+522749.00 BLL 08 09 49.1868285744 +52 18 58.249938744   16.11 15.59 14.6   ~ 250 2
9 QSO B0829+047 BLL 08 31 48.8770033992 +04 29 39.086842884   17.10 16.4 14.55   ~ 442 2
10 QSO B0927+500 BLL 09 30 37.5737660328 +49 50 25.549611036   18.81 18.25 17.3   ~ 101 1
11 Mrk 421 BLL 11 04 27.3140835504 +38 12 31.798495872   13.50 12.90 8.31   ~ 2540 1
12 6C 113337+702604 BLL 11 36 26.4090783600 +70 09 27.309071232   15.16 14.49 10.51   ~ 339 1
13 QSO B1212+078 BLL 12 15 10.9765816512 +07 32 04.676330688     16.0 14.8   ~ 89 1
14 Ton 605 HB* 12 16 53.6748432768 +30 04 08.692883544   16.110 15.98     B 221 0
15 6C 121520+302351 BLL 12 17 52.0819904040 +30 07 00.634936872   16.07 15.62 13.47   ~ 438 1
16 QSO B1218+304 BLL 12 21 21.9426947832 +30 10 37.158534012   16.50 15.85 15.7   ~ 431 1
17 QSO B1229+6430 BLL 12 31 31.3949261640 +64 14 18.280701600   18.36 17.62 14.3   ~ 132 2
18 QSO B1255+244 BLL 12 57 31.9330943592 +24 12 40.164677136     15.4 15.7   ~ 76 0
19 6C 141804+543700 BLL 14 19 46.5974051952 +54 23 14.787857796   16.17 15.65 14.16   ~ 562 1
20 QSO B1426+428 BLL 14 28 32.6090008440 +42 40 21.048123396   16.95 16.45 14.4   ~ 482 2
21 QSO B1440+122 BLL 14 42 48.2771008152 +12 00 40.348597716   18.34 17.63 15.2   ~ 153 2
22 QSO B1514-24 BLL 15 17 41.8134049824 -24 22 19.482207024   15.13 14.00 13.95   ~ 704 3
23 4C 39.49 BLL 16 53 52.2160772976 +39 45 36.613228860 14.09 14.15 13.29 8.26   ~ 2037 2
24 6C 172704+501607 BLL 17 28 18.6242294352 +50 13 10.469553996   16.55 15.97 12.95   ~ 344 1
25 3C 371 BLL 18 06 50.6802916920 +69 49 28.109609256   14.77 14.22 11.39   ~ 820 2
26 QSO B1959+650 BLL 19 59 59.8520303688 +65 08 54.652536492     12.8 11.21   ~ 557 2
27 NAME BL Lac BLL 22 02 43.2913536816 +42 16 39.979416792   15.66 14.72     ~ 2140 1
28 4C 04.77 BLL 22 04 17.6521146096 +04 40 02.027503020   16.20 15.2 10.2   ~ 188 2
29 QSO B2254+0727 BLL 22 57 17.3029968648 +07 43 12.297630108   17.07 16.36     ~ 291 1
30 QSO B2344+514 BLL 23 47 04.8372110928 +51 42 17.877513168     15.50 10.7   ~ 414 0
31 QSO B2356-309 BLL 23 59 07.9034996184 -30 37 40.671098544   18.414 16.44 16.795   ~ 275 1

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2022.09.26-08:19:43

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