2015A&A...578A.123R


Query : 2015A&A...578A.123R

2015A&A...578A.123R - Astronomy and Astrophysics, volume 578A, 123-123 (2015/6-1)

Connection between inner jet kinematics and broadband flux variability in the BL Lacertae object S5 0716+714.

RANI B., KRICHBAUM T.P., MARSCHER A.P., HODGSON J.A., FUHRMANN L., ANGELAKIS E., BRITZEN S. and ZENSUS J.A.

Abstract (from CDS):

We present a high-frequency very long baseline interferometry (VLBI) kinematical study of the BL Lac object S5 0716+714 over the time period of September 2008 to October 2010. The aim of the study is to investigate the relation of the jet kinematics to the observed broadband flux variability. We find significant non-radial motions in the jet outflow of the source. In the radial direction, the highest measured apparent speed is ∼37c, which is exceptionally high, especially for a BL Lac object. Patterns in the jet flow reveal a roughly stationary feature ∼0.15 mas downstream of the core. The long-term fits to the component trajectories reveal acceleration in the sub-mas region of the jet. The measured brightness temperature, TB, follows a continuous trend of decline with distance, TB∝rjet–(2.36±0.41), which suggests that there is a gradient in Doppler factor along the jet axis. Our analysis favors that a moving disturbance (or a shock wave) from the base of the jet produces the high-energy (optical to γ-ray) variations upstream of the 7mm core and then later causes an outburst in the core. Repetitive optical/γ-ray flares and the curved trajectories of the associated components suggest that the shock front propagates along a bent trajectory or helical path. Sharper γ-ray flares could be related to the passage of moving disturbances through the stationary feature. Our analysis indicates that the γ-ray and radio emission regions have different Doppler factors.

Abstract Copyright:

Journal keyword(s): galaxies: active - BL Lacertae objects: individual: S5 0716+714 - galaxies: jets - radio continuum: galaxies - gamma rays: galaxies

Simbad objects: 1

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Number of rows : 1
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 8C 0716+714 BLL 07 21 53.4482942664 +71 20 36.363846516   15.5 14.17 14.27   ~ 1238 1

Query : 2015A&A...578A.123R

Basic data :
8C 0716+714 -- BL Lac
Origin of the objects types :

(Ref) Object type as listed in the reference "Ref"
(acronym) Object type linked to the acronym according to the original reference
() Anterior to 2007, before we can link the objet type to a reference, or given by the CDS team in some particular cases

Other object types:
Rad (2020A&A,8C,...), gam (1AGL,2AGL,...), BLL (2010ApJ,[VV2000b],...), X (2009A&A,1AXG,...), Bla (2012ApJ,[DGT2001],...), QSO (2009ApJS,QSO,...), IR (IRAS,2MASS,...), AGN (2011ApJ,CGRaBS), V* (AAVSO), G (2012A&A), * (Gaia)
Syntax of coordinates is : "ra dec (wtype) [error ellipse] quality bibcode" :
  • ra dec : right ascension and declination (unit and frame defined according to your Output Options)
    Grey values are increasing the original precision due to the computation of frame transformations
  • (wtype) : wavelength class for the origin of the coordinates (Rad, mm, IR, Optical, UV, Xray, Gam)
  • [error ellipse] : measurement uncertainty, on (ra,dec) if the positional angle is 90 degrees, on (majaxis,minaxis) otherwise (in mas at defined epoch in the original catalogue),
    position angle (in degrees North celestial pole to East)
  • quality : flag of quality
    • E ≥ 10"
    • D : 1-10" (and some old data)
    • C : 0.1-1"
    • B : 0.01-0.1" + 2MASS, Tyc
    • A : VLBI, Hipparcos
  • bibcode : bibcode of the coordinates reference
ICRS coord. (ep=J2000) :
07 21 53.4482942664 +71 20 36.363846516 (Optical) [ 0.0091 0.0127 90 ] A 2020yCat.1350....0G
Syntax of coordinates is : "ra dec (wtype) [error ellipse] quality bibcode" :
  • ra dec : right ascension and declination (unit and frame defined according to your Output Options)
    Grey values are increasing the original precision due to the computation of frame transformations
  • (wtype) : wavelength class for the origin of the coordinates (Rad, mm, IR, Optical, UV, Xray, Gam)
  • [error ellipse] : measurement uncertainty, on (ra,dec) if the positional angle is 90 degrees, on (majaxis,minaxis) otherwise (in mas at defined epoch in the original catalogue),
    position angle (in degrees North celestial pole to East)
  • quality : flag of quality
    • E ≥ 10"
    • D : 1-10" (and some old data)
    • C : 0.1-1"
    • B : 0.01-0.1" + 2MASS, Tyc
    • A : VLBI, Hipparcos
  • bibcode : bibcode of the coordinates reference
FK4 coord. (ep=B1950 eq=1950) :
07 16 13.0114550060 +71 26 15.198004462 [ 0.0091 0.0127 90 ]
Syntax of coordinates is : "ra dec (wtype) [error ellipse] quality bibcode" :
  • ra dec : right ascension and declination (unit and frame defined according to your Output Options)
    Grey values are increasing the original precision due to the computation of frame transformations
  • (wtype) : wavelength class for the origin of the coordinates (Rad, mm, IR, Optical, UV, Xray, Gam)
  • [error ellipse] : measurement uncertainty, on (ra,dec) if the positional angle is 90 degrees, on (majaxis,minaxis) otherwise (in mas at defined epoch in the original catalogue),
    position angle (in degrees North celestial pole to East)
  • quality : flag of quality
    • E ≥ 10"
    • D : 1-10" (and some old data)
    • C : 0.1-1"
    • B : 0.01-0.1" + 2MASS, Tyc
    • A : VLBI, Hipparcos
  • bibcode : bibcode of the coordinates reference
Gal coord. (ep=J2000) :
143.9810435113266 +28.0175584586482 [ 0.0091 0.0127 90 ]
Syntax of proper motions is : "pm-ra pm-dec [error ellipse] quality bibcode"
  • pm-ra : mu-ra*cos(dec) (expressed in the ICRS system in mas/yr)
  • pm-dec : mu-dec (expressed in the ICRS system in mas/yr)
  • [error ellipse] : error major axis and minor axis (in mas), orientation angle (in deg)
  • quality : flag of quality (A=best quality -> E=worst quality, {� } =unknown quality)
  • bibcode : bibcode of the proper motion reference
Proper motions mas/yr :
0.051 -0.015 [0.012 0.017 90] A 2020yCat.1350....0G
Syntax of radial velocity (or/and redshift) is : "value [error] (wavelength) quality bibcode"
  • value : radial velocity or/and redshift (Heliocentric frame) according to your Output Options
    (redshift may be not displayed if the data value is <0 and the database inside value is a radial velocity)
  • [error] : error of the corresponding value displayed before
  • (wavelength) : wavelength range of the measurement : Rad, mm, IR, Opt, UV, Xray, Gam or  '∼'(unknown)
  • quality : flag of quality ( A=best quality -> E=worst quality, {� } =unknown quality)
  • bibcode : bibcode of the value's origin
Radial velocity / Redshift / cz :
V(km/s) 76898 [~] / z(emission) 0.300 [~] / cz 89938 [~]
   (Opt) D 2016ApJ...818..113N
Syntax of fluxes (or magnitudes) is : "filter-name (System) flux-value [error] quality MultVarFlags bibcode"
  • filter-name : U, B, V, R, I, G, J, H, K, u, g, r, i, z
  • (System) : may be AB (default is Vega)
  • flux-value : value of flux or magnitude
  • [error] : error value
  • quality : flag of quality of the flux value ( A=best quality -> E=worst quality, {� } =unknown quality)
  • MultVarFlags : Mult is zero or one char (J) for joined photometry ; Var can be zero or two chars (V[0-4])
  • bibcode : bibcode of the flux reference
Fluxes (7) :
B 15.5 [~] E ~
V 14.17 [~] E ~
R 14.27 [~] D 2008ApJS..175...97H
G 13.521193 [0.022406] C 2020yCat.1350....0G
J 11.942 [0.021] C 2003yCat.2246....0C
H 11.198 [0.019] C 2003yCat.2246....0C
K 10.432 [0.022] C 2003yCat.2246....0C
SIMBAD within arcmin
', {sourceSize:12, color:'#30a090'})); aladin.on('objectClicked', function(object) { var objName=object.data.MAIN_ID; aladin.showPopup(object.ra,object.dec,'',''+ objName+''); });" title="Show Simbad objects"> Overlay Simbad points in this preview
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The search radius has to be specified by the user. It is currently limited to a maximum of 30 arcsec. It depends mostly on the precision or quality of the coordinates (SIMBAD and VizieR catalogs), the resolution of the images from which the sources were extracted, source extent, and source crowding.
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Some important notes on this object about identifications and objects associations.
notes:


The link on the acronym of the identifiers give access to the information for this acronym in the dictionary of nomenclature.
Identifiers (89) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

8C 0716+714 1FHL J0721.8+7120 PKS 0716+71 2XMM J072153.2+712036
1AGL J0722+7125 2FHL J0721.9+7121 QSO B0716+714 9Y-MST J0721+7120
1AGL J0722+7126 3FHL J0721.8+7120 QSO J0721+7120 [CAB95] IRAS F07162+7126
2AGL J0723+7122 1FLE J0721+7121 RGB J0721+713 [DGT2001] B0716+714
1AGLR J0723+7121 GB6 J0721+7120 RGB J0721.9+7120 [HB93] 0716+714
1AXG J072157+7120 GB6 B0716+7126 RORF 0716+714 [HMI96] 0716+7126
BWE 0716+7126 87GB 071611.1+712619 RX J0721.8+7120 [IN88] 0716+714
6C 071614+712619 GeV J0719+7133 1RXS J072153.2+712031 [MGL2009] BZB J0721+7120
7C 071610.69+712601.00 1H 0717+714 S5 0716+71 [MML2015] 5BZB J0721+7120
CGRaBS J0721+7120 ICRF J072153.4+712036 S5 0716+714 [P82] 0716+714
CJ1 0716+714 IERS B0716+714 SWIFT J0721.0+7133 [VV2000b] J072153.3+712036
CJF B0716+714 INTREF 326 TeV J0721+713 [VV2003b] J072153.3+712036
CLASS J072153.4480+712036.374 IRAS F07162+7126 TIC 147796121 [VV2006b] J072153.3+712036
2E 1802 IVS B0716+714 TXS 0716+714 [VV2010b] J072153.3+712036
2E 0716.2+7126 JVAS B0716+714 VLSS J0721.8+7120 [VV98b] J072153.3+712036
2EG J0720+7126 JVAS J0721+713 WB 0716+7126 [WCO2009] J072240+712053
3EG J0721+7120 1Jy 0716+714 WISE J072153.44+712036.2 AAVSO 0710+71
EGR J0723+7134 1Jy 0716+71 WISE J072153.44+712036.3 Gaia DR3 1111278502434316672
0FGL J0722.0+7120 2MASS J07215342+7120362 WMAP J0721+7120 Gaia DR1 1111278498138043264
1FGL J0721.9+7120 MY 071613.7+712032.6 WMAP J0721+7122 Gaia DR2 1111278502434316672
2FGL J0721.9+7120 NAME OKM2018 SWIFT J0721.0+7133 WMAP J0721+7121
3FGL J0721.9+7120 NVSS J072153+712036 WMAP J0722+7121
4FGL J0721.9+7120 PKS 0716+714 WN B0716.2+7126

References (1238 between 1850 and 2023) (Total 1238)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
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Collections of Measurements


velocities : 2    V* : 1    PM : 3   

   

Observing logs


ISO : 3    IUE : 23    XMM : 1   

   


External archives :

Archive data at HEASARC - High-Energy Astrophysics Science Archive Research Center

Data at NED - NASA/IPAC Extragalactic Database : 8C 0716+714

Link by name to the catalogue in VizieR :

BWE 0716+7126 2E 1802 3EG J0721+7120 IERS B0716+714 IRAS F07162+7126
2MASS J07215342+7120362 NVSS J072153+712036 PKS 0716+714 PKS 0716+71 1RXS J072153.2+712031
WISE J072153.44+712036.2 WISE J072153.44+712036.3 WMAP J0721+7120 WMAP J0721+7122 WMAP J0721+7121
WMAP J0722+7121 WN B0716.2+7126 Gaia DR3 1111278502434316672 Gaia DR1 1111278498138043264 Gaia DR2 1111278502434316672

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2023.02.01-07:10:37

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