J/A+A/630/A56 A gamma-ray emission zone in 3C 279 (Patino-Alvarez+, 2019)
Is there a non-stationary gamma-ray emission zone 42 pc from the 3C 279 core?
Patino-Alvarez V.M., Dzib S.A., Lobanov A., Chavushyan V.
<Astron. Astrophys. 630, A56 (2019)>
=2019A&A...630A..56P 2019A&A...630A..56P (SIMBAD/NED BibCode)
ADC_Keywords: Active gal. nuclei ; Gamma rays ; Interferometry ; Radio sources
Keywords: gamma-rays: galaxies - radiation mechanisms: non-thermal -
quasars: individual: 3C 279 - galaxies: active -
techniques: high angular resolution
Abstract:
We investigate the relationship between the variable gamma-ray
emission and jet properties in the blazar 3C 279, by combining the
Fermi/LAT data spanning a period of eight years with concurrent radio
measurements made at multiple epochs with VLBA at 15 and 43 GHz within
the MOJAVE and VLBA-BU monitoring programs. The aim of this paper is
to compare the flux variability of the different components found in
the VLBA observations, to the variability in the gamma-rays. This
analysis helps to investigate whether any of the jet components can be
associated with the gamma-ray variability. Through Spearman rank
correlation we found that the gamma-ray variability is correlated with
a particular region (feature B, in the MOJAVE images) downstream from
the observed base (core) of the jet. This jet component is therefore a
likely location at which an important fraction of the variable
gamma-ray emission is produced. We also calculated the average proper
motion of the component with respect to the VLBA core and found that
it moves at an apparent superluminal velocity of (3.70±0.35)c,
implying that one of the gamma-ray emission zones is not stationary.
This jet component is also found between 6.86mas and 8.68mas, which
translates to a distance from the radio core of at least 42pc.
Description:
File table1 contains the VLBA flux from the MOJAVE core in 3C 279, as
well as the simultaneous gamma-ray fluxes associated.
File table2 contains the VLBA flux from the MOJAVE feature B in 3C
279, as well as the simultaneous gamma-ray fluxes associated.
File table3 contains the VLBA flux from the Boston core in 3C 279, as
well as the simultaneous gamma-ray fluxes associated.
File table4 contains the VLBA flux from the Boston ejection C31 in 3C
279, as well as the simultaneous gamma-ray fluxes associated.
Objects:
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RA (2000) DE Designation(s)
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12 56 11.17 -05 47 21.5 3C 279 = AT20G J125611-054721
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 46 24 VLBA fluxes for the 15GHz core of 3C 279 in the
MOJAVE maps, along with the simultaneous
gamma-ray fluxes
table2.dat 46 20 VLBA fluxes for the feature B of 3C 279 in the
MOJAVE maps, along with the simultaneous
gamma-ray fluxes
table3.dat 46 89 VLBA fluxes for the 43GHz core of 3C 279 in the
BU-VLBA maps, along with the simultaneous
gamma-ray fluxes
table4.dat 46 17 VLBA fluxes for the ejection C31 of 3C 279 in
the BU-VLBA maps, along with the simultaneous
gamma-ray fluxes
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See also:
J/A+A/409/857 : Optical polarization of 3C 279 (Andruchow+, 2003)
J/AJ/133/2866 : 2001-02 optical variability of blazar 3C279 (Kartaltepe+, 2007)
J/ApJ/772/13 : VLBI observations of 3C 279 at 230GHz (Lu+, 2013)
J/A+A/590/A10 : 3C 279 optical photometry and polarimetry (Kiehlmann+, 2016)
J/AJ/151/54 : VRIJHK photometry of 3C 279 (Sandrinelli+, 2016)
Byte-by-byte Description of file: table1.dat table2.dat table3.dat table4.dat
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Bytes Format Units Label Explanations
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1- 5 I5 d MJD Modified Julian day of the VLBA observation
8- 18 E11.6 ph/cm+2/s Fgamma Gamma-ray flux
21- 31 E11.6 ph/cm+2/s e_Fgamma Error in gamma-ray flux
34- 40 F7.1 mJy FVLBA Integrated flux
43- 46 F4.1 mJy e_FVLBA Error in integrated flux (random error only)
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Acknowledgements:
Victor Manuel Patino-Alverez, victorm.patinoa(at)gmail.com
(End) Patricia Vannier [CDS] 20-Aug-2019