# 2010A&A...516A..89R

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 Query : 2010A&A...516A..89R

2010A&A...516A..89R - Astronomy and Astrophysics, volume 516, A89-89 (2010/6-3)

A non-hydrodynamical model for acceleration of line-driven winds in active galactic nuclei.

RISALITI G. and ELVIS M.

Abstract (from CDS):

Radiation driven winds are the likely origin of AGN outflows, and are believed to be a fundamental component of the inner structure of AGNs. Several hydrodynamical models have been developed, showing that these winds can be effectively launched from AGN accretion disks. Here we want to study the acceleration phase of line-driven winds in AGNs, in order to examine the physical conditions required for the existence of such winds for a wide variety of initial conditions. We built a simple and fast non-hydrodynamic model QWIND, where we assume that a wind is launched from the accretion disk at supersonic velocities of a few 100km/s, and we concentrated on the subsequent supersonic phase, when the wind is accelerated to final velocities up to 104km/s. We show that, with a set of initial parameters in agreement with observations in AGNs, this model can produce a wind with terminal velocities on the order of 104km/s. There are three zones in the wind, only the middle one of which can launch a wind: in the inner zone the wind is too ionized and so experiences only the Compton radiation force, which is not effective in accelerating gas. This inner failed wind'' is important for shielding the next zone by lowering the ionization parameter there. In the middle zone the lower ionization of the gas leads to a much larger radiation force and the gas achieves escape velocity. This middle zone is quite thin (about 100 gravitational radii). The outer, third zone is shielded from the UV radiation by the central wind zone, so does not achieve a high enough acceleration to reach escape velocity. We also describe a simple analytic approximation of our model, in which we neglect the effects of gravity during the acceleration phase. This analytic approach agrees with the results of the numerical code, and is a powerful way to check whether a radiation driven wind can be accelerated with a given set of initial parameters. Our analytical analysis and the fast QWIND model agree with more complex hydrodynamical models, and allow exploration of the dependence of the wind properties for a wide set of initial parameters: black hole mass, Eddington ratio, initial density profile, X-ray to UV ratio.

Journal keyword(s): galaxies: active - quasars: general - acceleration of particules

Full paper

 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 QSO B1254+0443 QSO 12 56 59.9234909976 +04 27 34.411850136   16.53 16.25     ~ 155 0

 Query : 2010A&A...516A..89R

Basic data :
QSO B1254+0443 -- Quasar
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:
QSO (2011MNRAS,QSO,...), * (PB,Gaia), UV (PG), IR (2MASS)
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) :
12 56 59.9234909976 +04 27 34.411850136 (Optical) [ 0.0481 0.0281 90 ] A
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) :
12 54 27.4561571354 +04 43 47.130281472 [ 0.0481 0.0281 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) :
306.5243377320316 +67.2925106658943 [ 0.0481 0.0281 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 :
0.027 -0.050 [0.061 0.052 90] A
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) 182033 [48] / z(spectroscopic) 1.02277 [0.00016] / cz 306618.7 [48.0]
(Opt) C
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 16.53 [~] D V 16.25 [~] D G 15.964279 [0.002975] C J (AB) 15.862 [0.004] B H (AB) 15.945 [0.005] B K (AB) 15.715 [0.005] B u (AB) 16.4489 [0.0234] C g (AB) 16.2311 [0.0197] C r (AB) 16.0513 [0.0189] C i (AB) 16.0713 [0.0183] C z (AB) 15.9688 [0.0211] C
', {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 points in this preview
 All (CDSPortal) Send to 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!).

 The link on the acronym of the identifiers give access to the information for this acronym in the dictionary of nomenclature. Identifiers (22) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

 QSO B1254+0443 QSO J1256+0427 [HB93] 1254+047 [VV98] J125659.9+042734 2MASS J12565991+0427344 QSO B1254+047 [VV2000] J125659.9+042734 [WTW94] 1254+047 PB 4381 SDSS J125659.92+042734.3 [VV2003] J125659.9+042734 Gaia DR2 3704749355426446464 PG 1254+047 SDSS J125659.92+042734.4 [VV2006] J125659.9+042734 Gaia DR3 3704749355426446464 PG 1254+04 TIC 411217067 [VV2010] J125659.9+042734 QSO J1257+0427 [BDW2002] q1254+0443 [VV96] J125659.9+042734

 References (155 between 1850 and 2023) (Total 155) Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system). Follow new references on this object
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Collections of Measurements

velocities : 11    PM : 2

Observing logs

herschel : 3    ISO : 3    IUE : 2

External archives :

Link by name to the catalogue in VizieR :

 2MASS J12565991+0427344 PB 4381 PG 1254+047 PG 1254+04 SDSS J125659.92+042734.3 SDSS J125659.92+042734.4 Gaia DR2 3704749355426446464 Gaia DR3 3704749355426446464

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2023.02.07-16:43:39