2016A&A...586A.113K


C.D.S. - SIMBAD4 rel 1.7 - 2021.01.25CET17:42:14

2016A&A...586A.113K - Astronomy and Astrophysics, volume 586A, 113-113 (2016/2-1)

Discovery of off-axis jet structure of TeV blazar Mrk 501 with mm-VLBI.

KOYAMA S., KINO M., GIROLETTI M., DOI A., GIOVANNINI G., ORIENTI M., HADA K., ROS E., NIINUMA K., NAGAI H., SAVOLAINEN T., KRICHBAUM T.P. and PEREZ-TORRES M.A.

Abstract (from CDS):

High-resolution millimeter wave very-long-baseline interferometry (mm-VLBI) is an ideal tool for probing the structure at the base of extragalactic jets in detail. The TeV blazar Mrk 501 is one of the best targets among BL Lac objects for studying the nature of off-axis jet structures because it shows different jet position angles at different scales. The aim of this study is to investigate the properties of the off-axis jet structure through high-resolution mm-VLBI images at the jet base and physical parameters such as kinematics, flux densities, and spectral indices. We performed Very Long Baseline Array (VLBA) observations over six epochs from 2012 February to 2013 February at 43GHz. Quasi-simultaneous Global Millimeter VLBI Array (GMVA) observations at 86GHz were performed in May 2012. We discover a new jet component at the northeast direction from the core in all the images at 43 and 86GHz. The new component shows the off-axis location from the persistent jet extending to the southeast. The 43GHz images reveal that the scattering of the positions of the NE component is within ∼0.2mas. The 86GHz data reveals a jet component located 0.75mas southeast of the radio core. We also discuss the spectral indices between 43 and 86GHz, where the northeast component has steeper spectral index and the southeast component has comparable or flatter index than the radio core does.

Abstract Copyright:

Journal keyword(s): BL Lacertae objects: individual: Markarian 501 - galaxies: active - galaxies: jets - radio continuum: galaxies

CDS comments: Components CN not in SIMBAD.

Simbad objects: 9

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Number of rows : 9

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 4C 50.11 QSO 03 59 29.74726473 +50 57 50.1615765           ~ 399 1
2 Mrk 5 H2G 06 42 15.9 +75 37 40   17.0       ~ 109 0
3 QSO J0854+2006 BLL 08 54 48.8749311881 +20 06 30.642936668   15.91 15.43 15.56   ~ 2049 1
4 Mrk 421 BLL 11 04 27.3139210166 +38 12 31.798324828   13.50 12.90 8.31   ~ 2418 1
5 3C 279 QSO 12 56 11.1664521013 -05 47 21.531840471   18.01 17.75 15.87   ~ 2742 2
6 3C 345 QSO 16 42 58.8100340220 +39 48 36.999540578   16.81 16.59 16.84   ~ 1568 2
7 4C 39.49 BLL 16 53 52.21668494 +39 45 36.6089458 14.09 14.15 13.29 8.26   ~ 1945 2
8 QSO B2136+1410 QSO 21 39 01.30926937 +14 23 35.9922096     18.5 18.22   ~ 235 1
9 NAME BL Lac BLL 22 02 43.2913773726 +42 16 39.978417860   15.66 14.72     ~ 2030 1

    Equat.    Gal    SGal    Ecl

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2021.01.25-17:42:14

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