2019A&A...625A..26R

Query : 2019A&A...625A..26R

2019A&A...625A..26R - Astronomy and Astrophysics, volume 625A, 26-26 (2019/5-1)

X-ray analysis of the accreting supermassive black hole in the radio galaxy PKS 2251+11.

RONCHINI S., TOMBESI F., VAGNETTI F., PANESSA F. and BRUNI G.

Abstract (from CDS):


Context. We have investigated the dichotomy between jetted and non-jetted active galactic nuclei (AGNs), focusing on the fundamental differences of these two classes in the accretion physics onto the central supermassive black hole (SMBH). We tested the validity of the unification model of AGNs through the characterization of the mutual interaction between accreting and outflowing matter in radio galaxies.
Aims. Our aim is to study and constrain the structure, kinematics and physical state of the nuclear environment in the broad line radio galaxy (BLRG) PKS 2251+11. The high X-ray luminosity and the relative proximity make such AGN an ideal candidate for a detailed analysis of the accretion regions in radio galaxies. The investigation will help to shed light on the analogies and differences between the BLRGs and the larger class of radio-quiet Seyfert galaxies and hence on the processes that trigger the launch of a relativistic jet.
Methods. We performed a spectral and timing analysis of a ∼64ks observation of PKS 2251+11 in the X-ray band with XMM-Newton. We modeled the spectrum considering an absorbed power law superimposed to a reflection component. We performed a time-resolved spectral analysis to search for variability of the X-ray flux and of the individual spectral components.
Results. We find that the power law has a photon index Γ=1.8±0.1, absorbed by an ionized partial covering medium with a column density NH=(10.1±0.8)x1023cm–2, a ionization parameter logξ=1.3±0.1(erg/s).cm and a covering factor f~=90%. Considering a density of the absorber typical of the broad line region (BLR), its distance from the central SMBH is of the order of r∼0.1pc. An Fe Kα emission line is found at 6.4keV, whose intensity shows variability on timescales of hours. We derive that the reflecting material is located at a distance r≥600rs, where rs is the Schwarzschild radius.
Conclusions. Concerning the X-ray properties, we found that PKS 2251+11 does not differ significantly from the non-jetted AGNs, confirming the validity of the unified model in describing the inner regions around the central SMBH, but the lack of information regarding the state of the very innermost disk and SMBH spin still leaves unconstrained the origin of the jet.

Abstract Copyright: © ESO 2019

Journal keyword(s): galaxies: active - galaxies: nuclei - accretion, accretion disks

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 4C 11.72 BLL 22 54 10.4214226080 +11 36 38.748083760   16.02 15.82     ~ 341 1

Query : 2019A&A...625A..26R

Basic data :
4C 11.72 -- 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: 		Sy1 (), Rad (2020A&A,4C,...), QSO (2016ApJ,QSO,...), X (AX,RX,...), BLL (2014ApJS), MIR (WISEA,WISE), AGN (2021Sci), Q? ([CSC85]), G (LEDA), * (Gaia), BH? ([KB2007]), gam (INTREF), UV (PG), NIR (2MASS), Opt (SDSS), var (2021Sci)
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) : 		22 54 10.4214226080 +11 36 38.748083760 (Optical) [ 0.0343 0.0340 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) : 		22 51 40.5658466676 +11 20 39.149065137 [ 0.0343 0.0340 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) : 		082.7832750927259 -41.9404501429322 [ 0.0343 0.0340 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 : 		-0.011 0.046 [0.050 0.044 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) 81788 [~] / z(emission) 0.323 [~] / cz 96833 [~]
   (Opt) D 2016ApJ...818..113N
Syntax of morphological type is : mtype quality bibcode
  • mtype : Hubble morphological class (spirals, ellipticals, etc)
  • quality : flag of quality (A=best quality -> E=worst quality, {� } =unknown quality)
  • bibcode : bibcode of the morphological type reference
Morphological type: 		E D ~
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 (11) :
B 16.02 [~] D 2010A&A...518A..10V
V 15.82 [~] D 2010A&A...518A..10V
G 15.492444 [0.004660] C 2020yCat.1350....0G
J 14.442 [0.036] C 2003yCat.2246....0C
H 13.473 [0.036] C 2003yCat.2246....0C
K 12.507 [0.029] C 2003yCat.2246....0C
u (AB) 15.870 [0.006] B 2020ApJS..249....3A
g (AB) 15.687 [0.004] B 2020ApJS..249....3A
r (AB) 15.433 [0.004] B 2020ApJS..249....3A
i (AB) 15.525 [0.004] B 2020ApJS..249....3A
z (AB) 14.781 [0.005] B 2020ApJS..249....3A
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.
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 (53) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

4C 11.72 OHIO Y 186 1RXS J225411.8+113633 [S77] 381
AX J2254.1+1136 PG 2251+113 S2 2251+11 [SBS92] 2251+113
BWE 2251+1120 PKS 2251+113 SDSS J225410.42+113638.8 [VV2000] J225410.5+113638
GB6 B2251+1120 PKS 2251+11 TIC 257313666 [VV2003] J225410.5+113638
87GB 225140.5+112042 PKS J2254+1136 TXS 2251+113 [VV2006] J225410.5+113638
ICRF J225410.4+113638 QSO B2251+1120 UT 2251+113 [VV2010] J225410.5+113638
IERS B2251+113 QSO B2251+1124 VLSS J2254.1+1136 [VV96] J225410.5+113638
INTREF 1093 QSO J2254+1136 WB 2251+1120 [VV98] J225410.5+113638
IVS B2251+113 QSO B2251+115 WISEA J225410.42+113638.8 [WTW94] 2251+113
LEDA 2819038 QSO B2251+11 WISE J225410.42+113638.8 Gaia DR3 2718410390777896576
2MASS J22541042+1136387 QSO B2251+113 [BDW2002] q2251+1120 Gaia DR2 2718410390777896576
MITG J225408+1136 RGB J2254.2+1136 [CSC85] 2251.7+1134
MRC 2251+113 RGB J2254+116 [HB93] 2251+113
NVSS J225410+113638 RX J2254.1+1136 [KB2007] J225410.4+113638.9

References (341 between 1850 and 2024) (Total 341)
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 : 7    PM : 2   

   

Observing logs


herschel : 5    IUE : 4   

   

External archives :

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

Data at NED - NASA/IPAC Extragalactic Database : 4C 11.72

Link by name to the catalogue in VizieR :

4C 11.72 BWE 2251+1120 IERS B2251+113 2MASS J22541042+1136387 MITG J225408+1136
NVSS J225410+113638 PG 2251+113 PKS 2251+113 PKS 2251+11 PKS J2254+1136
1RXS J225411.8+113633 SDSS J225410.42+113638.8 WISEA J225410.42+113638.8 WISE J225410.42+113638.8 Gaia DR3 2718410390777896576
Gaia DR2 2718410390777896576

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