J/MNRAS/468/4992 MOJAVE XIV. AGN jet shapes & opening angles (Pushkarev+, 2017)
MOJAVE. XIV. Opening angles and shapes of AGN jets.
Pushkarev A.B., Kovalev Y.Y., Lister M.L., Savolainen T.
<Mon. Not. R. Astron. Soc. 468, 4992 (2017)>
=2017MNRAS.468.4992P 2017MNRAS.468.4992P (SIMBAD/NED BibCode)
ADC_Keywords: Galaxies, radio ; Interferometry ; VLBI ; Interstellar medium
Keywords: galaxies: active - galaxies: jets - quasars: general -
BL Lacertae objects: general
Abstract:
We present 15 GHz stacked VLBA images of 373 jets associated with
active galactic nuclei (AGN) having at least 5 observing epochs within
a 20yr time interval 1994-2015 from the MOJAVE programme and/or its
precursor, the 2 cm VLBA Survey. These data are supplemented by 1.4
GHz single-epoch VLBA observations of 135 MOJAVE AGNs to probe larger
scale jet structures. The typical jet geometry is found to be close to
conical on scales from hundreds to thousands of parsecs, while a
number of galaxies show quasi-parabolic streamlines on smaller scales.
A true jet geometry in a considerable fraction of AGNs appears only
after stacking epochs over several years. The jets with significant
radial accelerated motion undergo more active collimation. We have
analyzed total intensity jet profiles transverse to the local jet
ridgeline and derived both apparent and intrinsic opening angles of
the flows, with medians of 21.5° and 1.3°, respectively. The
Fermi LAT-detected gamma-ray AGNs in our sample have, on average,
wider apparent and narrower intrinsic opening angle, and smaller
viewing angle than non LAT-detected AGNs. We have established a highly
significant correlation between the apparent opening angle and
gamma-ray luminosity, driven by Doppler beaming and projection
effects.
Description:
File table1 contains the name of the sources, alias, gamma-ray
association name, optical class, MOJAVE 1.5Jy sample membership flag,
redshift, reference for redshift.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 140 362 Source properties
table2.dat 89 362 Summary of 15GHz stacked image parameters
table3.dat 68 122 Summary of 1.4GHz single-epoch image parameters
table4.dat 160 362 Collimation and kinematic source parameters
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See also:
J/AJ/130/1389 : I. Linear polarization of AGN jets at 15GHz (Lister+, 2005)
J/AJ/131/1262 : II. 15GHz AGN jets circular polarization images (Homan+, 2006)
J/ApJS/171/376 : III. VLA 1.4GHz images (Cooper+, 2007)
J/AJ/137/3718 : V. 15GHz monitoring of AGN jets with VLBA (Lister+, 2009)
J/AJ/138/1874 : VI. Kinematic analysis of blazar jets (Lister+, 2009)
J/ApJ/706/1253 : VII. Blazar jet acceleration (Homan+, 2009)
J/AJ/144/105 : VIII. Faraday rotation in AGN jets. (Hovatta+, 2012)
J/A+A/545/A113 : IX. Core shift effects (Pushkarev+, 2012)
J/AJ/146/120 : X. Parsec-scale kinematics of AGNs (Lister+, 2013)
J/AJ/147/143 : XI. Spectral distributions (Hovatta+, 2014)
J/ApJ/798/134 : XII. Acceleration of blazar jets (Homan+, 2015)
J/AJ/152/12 : XIII. 1994-2013 new 15GHz observations (Lister+, 2016)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- BName Source name (B1950)
11- 20 A10 --- JName Source name (J2000)
23- 42 A20 --- OName Other name
45- 61 A17 --- GName Gamma-ray association name
62 A1 --- n_GName [ab] Note on Gamma-ray association (1)
64 A1 --- OptClass [BQGNU] Optical class (2)
68 A1 --- flag1.5Jy [Y] MOJAVE 1.5Jy sample membership flag
70- 77 F8.6 --- z ? Redshift
80- 98 A19 --- BibCode Reference for redshift
100-140 A41 --- n_BibCode Author's name and comments for BibCode
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Note (1): Note on gamma-ray association as follows:
a = Fermi LAT detection reported by Carpenter et al., 2014ATel.5838....1C 2014ATel.5838....1C
b = Fermi LAT detection reported by Abdo et al., 2010ApJ...720..912A 2010ApJ...720..912A
Note (2): Optical class as follows:
B = BL Lac
Q = quasar
G = radio galaxy
N = narrow-lined Seyfert 1
U = unidentified
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Byte-by-byte Description of file: table2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 8 A8 --- BName Source name (B1950)
12- 33 A22 --- OName Other name
37- 46 A10 "date" Epoch1 Date of first epoch
51- 55 F5.2 yr tau Time range between first and last epochs
58- 60 I3 --- N Number of stacked epochs
64- 67 F4.2 mas Beam FWHM of circular restoring beam
70- 75 F6.3 Jy/beam Ipeak Total intensity peak of image
79- 82 F4.2 mJy/beam rms rms noise level of image
86- 89 F4.2 mJy/beam Ibase Bottom I contour level
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Byte-by-byte Description of file: table3.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 8 A8 --- BName Source name (B1950)
11- 24 A14 --- OName Other name
28- 37 A10 --- Epoch Epoch date
42- 45 F4.1 mas Beam FWHM of circular restoring beam
49- 54 F6.3 Jy/beam Ipeak Total intensity peak of image
58- 61 F4.2 mJy/beam rms rms noise level of image
64- 68 F5.2 mJy/beam Ibase bottom I contour level
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 8 A8 --- BName Source name (B1950)
12- 15 F4.1 deg alphaApp15 Median apparent opening angle at 15GHz
19- 21 F3.1 deg e_alphaApp15 1-sigma error of median apparent
opening angle at 15GHz
24- 28 F5.2 --- k15 ? k-index at 15GHz
32- 35 F4.2 --- e_k15 ? 1-sigma error of k-index at 15GHz
39- 42 F4.1 mas r15 ? Angular jet length at 15GHz
46- 50 F5.1 pc l15 ? Linear projected jet length at 15GHz
54- 58 F5.2 c beta15 ? Apparent speed at 15GHz (1)
63- 66 F4.2 c e_beta15 ? 1-sigma error of apparent speed at 15GHz
71- 74 F4.1 --- delta ? Doppler factor
75 A1 --- n_delta [a] Note on delta (2)
79- 81 F3.1 --- e_delta ? 1-sigma error of Doppler factor
85- 88 F4.1 --- Gamma ? Lorentz factor
92- 95 F4.1 --- e_Gamma ? 1-sigma error of Lorentz factor
99-102 F4.1 deg theta ? Viewing angle
106-109 F4.1 deg e_theta ? 1-sigma error of viewing angle
114-116 F3.1 deg alphaInt ? Intrinsic opening angle
121-123 F3.1 deg e_alphaInt ? 1-sigma error of intrinsic opening angle
127-130 F4.2 --- k2 ? k-index at 2GHz
134-137 F4.2 --- e_k2 ? 1-sigma error of k-index at 2GHz
141-145 F5.1 mas r2 ? Angular jet length at 2GHz
150-153 F4.2 kpc l2p ? Linear projected jet length at 2GHz
156-160 F5.1 kpc l2d ? Linear deprojected jet length at 2GHz
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Note (1): Maximum radial, non-accelerating apparent jet speed references:
apparent speeds taken from Lister et al., 2016AJ....152...12L 2016AJ....152...12L,
doppler factors taken from Hovatta et al., 2009A&A...494..527H 2009A&A...494..527H,
(erratum in A&A, 498, 723).
Note (2): Doppler factors taken from Liodakis et al., 2017MNRAS.466.4625L 2017MNRAS.466.4625L .
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Acknowledgements:
Alexander Pushkarev, pushkarev.alexander(at)gmail.com
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 & Lister 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
Homan et al. Paper VII. 2009ApJ...706.1253H 2009ApJ...706.1253H Cat. J/ApJ/706/1253
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 This catalog
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) Alexander Pushkarev [CrAO, Russia], Patricia Vannier [CDS] 12-Jan-2017