J/ApJ/706/1253 MOJAVE VII. Blazar jet acceleration (Homan+, 2009)
MOJAVE: Monitoring Of Jets in Active Galactic Nuclei with VLBA Experiments.
VII. Blazar jet acceleration.
Homan D.C., Kadler M., Kellermann K.I., Kovalev Y.Y., Lister M.L., Ros E.,
Savolainen T., Zensus J.A.
<Astrophys. J., 706, 1253-1268 (2009)>
=2009ApJ...706.1253H 2009ApJ...706.1253H
ADC_Keywords: Active gal. nuclei ; Radio continuum ; Surveys ; BL Lac objects ;
QSOs ; Radio sources
Keywords: BL Lacertae objects: general - galaxies: active - galaxies: jets -
quasars: general - radio continuum: galaxies - surveys
Abstract:
We discuss acceleration measurements for a large sample of
extragalactic radio jets from the Monitoring Of Jets in Active
Galactic Nuclei with VLBA Experiments (MOJAVE) program, which studies
the parsec-scale jet structure and kinematics of a complete,
flux-density-limited sample of active galactic nuclei (AGNs).
Accelerations are measured from the apparent motion of individual jet
features or "components" which may represent patterns in the jet flow.
We find that significant accelerations are common both parallel and
perpendicular to the observed component velocities.
Description:
Here, we report the results of the first large-scale study of
accelerations in the apparent motions of blazar jets. We examine
accelerations both parallel and perpendicular to the apparent
component velocities, representing changes in apparent speed and
direction, respectively, and we analyze these acceleration
measurements for 203 of the best-determined jet component motions from
the MOJAVE program (Lister & Homan 2005, Cat. J/AJ/130/1389; Lister et
al. 2009, Cat. J/AJ/137/3718). This work is an extension of our
kinematical analysis of the MOJAVE I sample (Lister et al.
2009, Cat. J/AJ/138/1874).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
agn.dat 44 64 Positions for AGN sources
table1.dat 121 203 Components for acceleration and non-radial
motion analysis
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See also:
J/A+A/545/A113 : MOJAVE IX. Core shift effects (Pushkarev+, 2012)
J/ApJ/722/L7 : Fermi/LAT detected MOJAVE AGNs (Pushkarev+, 2010)
J/ApJ/710/764 : Extended radio emission in MOJAVE blazars (Kharb+, 2010)
J/AJ/138/1874 : MOJAVE. VI. Kinematic analysis of blazar jets (Lister+, 2009)
J/AJ/137/3718 : 15GHz monitoring of AGN jets with VLBA (Lister+, 2009)
J/ApJS/171/376 : MOJAVE. III. VLA 1.4GHz images (Cooper+, 2007)
J/AJ/133/2357 : Relativistic jets in the RRFID database (Piner+, 2007)
J/AJ/131/1262 : AGN jets circular polarization images at 15GHz (Homan+, 2006)
J/AJ/130/1389 : Linear polarization of AGN jets at 15GHz (Lister+, 2005)
J/AJ/130/1418 : AGN jet kinematics (Jorstad+, 2005)
J/A+A/435/521 : Radio Sources in Low-Luminosity AGNs. IV (Nagar+, 2005)
J/ApJ/609/539 : Kinematics of parsec-scale radio jets (Kellermann+, 2004)
J/A+A/381/757 : List of extra-galactic radio jets (Liu+, 2002)
Byte-by-byte Description of file: agn.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 5 A5 --- --- [QSO B]
6- 13 A8 --- QSO Source designation (HHMM+DDd, B1950)
15- 16 I2 h RAh SIMBAD hour of right ascension (J2000)
18- 19 I2 min RAm SIMBAD minute of right ascension (J2000)
21- 24 F4.1 s RAs SIMBAD second of right ascension (J2000)
26 A1 --- DE- SIMBAD sign of declination (J2000)
27- 28 I2 deg DEd SIMBAD degree of declination (J2000)
30- 31 I2 arcmin DEm SIMBAD arcminute of declination (J2000)
33- 34 I2 arcsec DEs SIMBAD arcsecond of declination (J2000)
37- 44 A8 --- OName Other designation
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Byte-by-byte Description of file: table1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
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1- 8 A8 --- QSO Source designation (HHMM+DDd, B1950)
10- 17 A8 --- OName Other designation
19- 20 I2 --- Seq Component number
22- 23 I2 --- N Number of epochs
25- 29 F5.2 mas Mean radial separation from core (averaged over
all epochs)
31- 36 F6.1 deg PA [-179,180] Mean structural position angle
38- 43 F6.2 pc dProj Mean projected radial distance
45- 48 I4 mas/yr pm Angular proper motion
50- 52 I3 mas/yr e_pm pm uncertainty
54- 57 F4.1 --- beta Apparent speed in units of the speed of light
59- 61 F3.1 --- e_beta beta uncertainty
63- 68 F6.1 deg phi [-180,180] Proper motion position angle φ
70- 72 F3.1 deg e_phi Phi uncertainty
74- 77 F4.1 --- Diff Absolute difference between mean structural
position angle and proper motion position angle
79- 81 F3.1 --- e_Diff Diff uncertainty
83- 86 I4 mas/yr2 dmu Angular acceleration parallel to the proper
motion position angle
88- 90 I3 mas/yr2 e_dmu dmu uncertainty
92- 95 I4 mas/yr2 dmup Angular acceleration perpendicular to the
proper motion position angle
97- 99 I3 mas/yr2 e_dmup mup uncertainty
101-105 F5.2 --- etaPa Relative parallel acceleration as defined in
Section 3.3
107-110 F4.2 --- e_etaPa etaPa uncertainty
112-116 F5.2 --- etaPe Relative perpendicular acceleration as defined
in Section 3.3.
118-121 F4.2 --- e_etaPe etaPe uncertainty
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History:
From electronic version of the journal
References:
Lister et al. Paper I. 2005AJ....130.1389L 2005AJ....130.1389L Cat. J/AJ/130/1389
Homan et al. Paper II. 2006AJ....131.1262H 2006AJ....131.1262H Cat. J/AJ/131/1262
Cooper et al. Paper III. 2007ApJS..171..376C 2007ApJS..171..376C Cat. J/ApJS/171/376
Cara et al. Paper IV. 2008ApJ...674..111C 2008ApJ...674..111C
Lister et al. Paper V. 2009AJ....137.3718L 2009AJ....137.3718L Cat. J/AJ/137/3718
Lister et al. Paper VI. 2009AJ....138.1874L 2009AJ....138.1874L Cat. J/AJ/138/1874
Hovatta et al. Paper VIII. 2012AJ....144..105H 2012AJ....144..105H Cat. J/AJ/144/105
Pushkarev et al. Paper IX. 2012A&A...545A.113P 2012A&A...545A.113P Cat. J/A+A/545/A113
Lister et al. Paper X. 2013AJ....146..120L 2013AJ....146..120L Cat. J/AJ/146/120
Hovatta et al. Paper XI. 2014AJ....147..143H 2014AJ....147..143H Cat. J/AJ/147/143
Homan et al. Paper XII. 2015ApJ...798..134H 2015ApJ...798..134H Cat. J/ApJ/798/134
Lister et al. Paper XIII. 2016AJ....152...12L 2016AJ....152...12L Cat. J/AJ/152/12
Pushkarev et al. Paper XIV. 2017MNRAS.468.4992P 2017MNRAS.468.4992P Cat. J/MNRAS/468/4992
Lister et al. Paper XV. 2018ApJS..234...12L 2018ApJS..234...12L Cat. J/ApJS/234/12
Hodge et al. Paper XVI. 2018ApJ...862..151H 2018ApJ...862..151H Cat. J/ApJ/862/151
Lister et al. Paper XVII. 2019ApJ...874...43L 2019ApJ...874...43L Cat. J/ApJ/874/43
Lister et al. Paper XVIII. 2021ApJ...923...30L 2021ApJ...923...30L Cat. J/ApJ/923/30
Homan et al. Paper XIX. 2021ApJ...923...67H 2021ApJ...923...67H Cat. J/ApJ/923/67
Pushkarev et al. Paper XX. 2023MNRAS.520.6053P 2023MNRAS.520.6053P
(End) Emmanuelle Perret [CDS] 14-Dec-2011