2001A&A...370...65S

Query : 2001A&A...370...65S

2001A&A...370...65S - Astronomy and Astrophysics, volume 370, 65-69 (2001/4-4)

Superluminal motion in a compact steep spectrum radio source 3C 138.

SHEN Z.-Q., JIANG D.R., KAMENO S. and CHEN Y.J.

Abstract (from CDS):

We present the results of 5 GHz VLBI observations of a compact steep spectrum source 3C 138. The data are consistent with the western end being the location of the central activity. The observed offset between different frequencies in the central region of 3C 138 can be accounted for by a frequency dependent shift of the synchrotron self-absorbed core. Our new measurements confirm the existence of a superluminal motion, but its apparent velocity of 3.3c is three times slower than the reported one. This value is consistent with the absence of parsec-scale counter-jet emission in the inner region, but seems still too high to allow the overall counter-jet to be seen in terms of Doppler boosting of an intrinsically identical jet. Either an interaction of jet with central dense medium, or an intrinsically asymmetrical jet must be invoked to reconcile the detected superluminal speed with the observed large scale asymmetry in 3C 138.

Abstract Copyright: ∼

Journal keyword(s): radio continuum: galaxies - galaxies: active - galaxies: compact - galaxies: jets - galaxies: nuclei - quasars: individual: 3C 138

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 - 2024 		#notes
1 ICRF J052109.8+163822 Sy1 05 21 09.88596258 +16 38 22.0515459   19.37 18.84 18.480   ~ 851 1

Query : 2001A&A...370...65S

Basic data :
ICRF J052109.8+163822 -- Seyfert 1 Galaxy
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: 		Sy1 (), Rad (2014ApJS,ICRF,...), QSO (2016A&A,QSO,...), X (2E,RX,...), MIR (WISEA,WISE), AGN (2020MNRAS), G (LEDA), * (Gaia), NIR (2MASS), IR (2MASSI)
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) : 		05 21 09.88596258 +16 38 22.0515459 (Radio) [ 0.075165 0.0891 0 ] A 2020A&A...644A.159C
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) : 		05 18 16.51728058 +16 35 26.8006140 [ 0.075165 0.0891 0 ]
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) : 		187.40494751838 -11.34349292266 [ 0.075165 0.0891 0 ]
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 : 		0.231 -0.110 [0.205 0.148 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) 153467 [~] / z(spectroscopic) 0.76 [~] / cz 227842 [~]
   (Opt) D 2017ApJS..233....3T
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 19.37 [~] D 2010A&A...518A..10V
V 18.84 [~] D 2010A&A...518A..10V
R 18.480 [~] D 2010ApJ...712..303C
G 18.390406 [0.004860] C 2020yCat.1350....0G
J 16.767 [0.135] D 2003yCat.2246....0C
H 16.157 [0.205] D 2003yCat.2246....0C
K 15.432 [0.148] D 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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within arcsec The VizieR photometry tool allows for easy visualization of photometry points extracted around the Simbad position from photometry-enabled catalogues in VizieR.
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.
Suggestions are: crowded field: 0.5 to 1.5 arcsec, 3 arcsec otherwise; uncertain coordinates (SIMBAD quality E or coordinates without reference): 5 to 30 arsec (risky!). sed-help-icon
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 (62) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

ICRF J052109.8+163822 2MASS J05210990+1638220 RGB J0521.2+1638 [HB93] 0518+165
BWE 0518+1635 2MASSI J0521099+163821 RGB J0521+166 [P82] 0518+165
3C 138 MITG J052112+1638 RORF 0518+165 [S77] 89
3C 138.0 MRC 0518+165 RX J0521.1+1638 [SJS95] 0518+165
4C 16.12 NAICGB 0518+165 1RXS J052110.1+163820 [VV2000] J052109.9+163821
3CR 138 NAIC 0518+165 SIM 0518+16.0 [VV2003] J052109.9+163821
Cul 0518+165 NRAO 205 TGSSADR J052109.9+163821 [VV2006] J052109.9+163821
DA 170 NVSS J052109+163822 TIC 412185721 [VV2010] J052109.9+163821
2E 1251 OHIO G 130.2 TXS 0518+165 [VV96] J052109.9+163821
2E 0518.2+1635 PKS J0521+1638 UT 0518+165 [VV98] J052109.9+163821
GB6 B0518+1635 PKS 0518+165 VRO 16.05.03 [WTW94] 0518+165
87GB 051817.3+163523 PKS 0518+16 WB 0518+1635 Gaia DR3 3394144669269567232
IERS B0518+165 QSO J0521+1638 WISEA J052109.89+163822.0 Gaia DR1 3394144669269567232
1Jy 0518+16 QSO B0518+165 WISE J052109.89+163822.0 Gaia DR2 3394144669269567232
1Jy 0518+165 QSO B0518+16 [DSJ85] 0518+165
LEDA 2817552 QSO B0518+1635 [GR92] 0518+165

References (851 between 1850 and 2024) (Total 851)
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 : 6    PM : 3   

   

Observing logs


herschel : 3    ISO : 4   

   

External archives :

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

Data at NED - NASA/IPAC Extragalactic Database : ICRF J052109.8+163822

Link by name to the catalogue in VizieR :

BWE 0518+1635 3C 138 3C 138.0 4C 16.12 3CR 138
2E 1251 IERS B0518+165 2MASS J05210990+1638220 2MASSI J0521099+163821 MITG J052112+1638
NVSS J052109+163822 PKS J0521+1638 PKS 0518+165 PKS 0518+16 1RXS J052110.1+163820
WISEA J052109.89+163822.0 WISE J052109.89+163822.0 Gaia DR3 3394144669269567232 Gaia DR1 3394144669269567232 Gaia DR2 3394144669269567232

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