Daria Morozova

Dr. Daria Morozova

orcid

Research Focus & Metrics

Academic Career Length

17Years (2010-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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5 September 2017 in The Astrophysical Journal
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Journal Article
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SJSvetlana Jorstad
Svetlana Jorstad
AMAlan P. Marscher
Alan P. Marscher
DMDaria Morozova
Daria Morozova
ITIvan Troitskiy
Ivan Troitskiy
IAIván Agudo
Iván Agudo
MTMerja Tornikoski
Merja Tornikoski
We analyze the parsec-scale jet kinematics from 2007 June to 2013 January of a sample of γ-ray bright blazars monitored roughly monthly with the Very Long Baseline Array at 43 GHz. In a total of 1929 images, we measure apparent speeds of 252 emission knots in 21 quasars, 12 BL Lacertae objects (BLLacs), and 3 radio galaxies, ranging from 0.02c to 78c; 21% of the knots are quasi-stationary. Approximately one-third of the moving knots execute non-ballistic motions, with the quasars exhibiting acceleration along the jet within 5 pc (projected) of the core, and knots in BLLacs tending to decelerate near the core. Using the apparent speeds of the components and the timescales of variability from their light curves, we derive the physical parameters of 120 superluminal knots, including variability Doppler factors, Lorentz factors, and viewing angles. We estimate the half-opening angle of each jet based on the projected opening angle and scatter of intrinsic viewing angles of knots. We determine characteristic values of the physical parameters for each jet and active galactic nucleus class based on the range of values obtained for individual features. We calculate the intrinsic brightness temperatures of the cores, , at all epochs, finding that the radio galaxies usually maintain equipartition conditions in the cores, while ∼30% of measurements in the quasars and BLLacs deviate from equipartition values by a factor >10. This probably occurs during transient events connected with active states. In the Appendix, we briefly describe the behavior of each blazar during the period analyzed.

4 December 2017 in Nature
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Journal Article
Closed access
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CRClaudia Maria Raiteri
Claudia Maria Raiteri
MVMassimo Villata
Massimo Villata
JAJ. A. Acosta-Pulido
J. A. Acosta-Pulido
IAI. Agudo
I. Agudo
AAA. A. Arkharov
A. A. Arkharov
OVO. Vince
O. Vince

12 January 2011 in The Astrophysical Journal
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Journal Article
Open access
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MAM. Ackermann
M. Ackermann
MAM. Ajello
M. Ajello
AAA. Allafort
A. Allafort
LBL. Baldini
L. Baldini
JBJ. Ballet
J. Ballet
AZA. Zook
A. Zook

5 August 2013 in The Astrophysical Journal
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Journal Article
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SJSvetlana Jorstad
Svetlana Jorstad
AMAlan P. Marscher
Alan P. Marscher
PSPaul S. Smith
Paul S. Smith
VLValeri Larionov
Valeri Larionov
IAIván Agudo
Iván Agudo
VSVladimir Strelnitski
Vladimir Strelnitski

16 July 2012 in The Astrophysical Journal
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Journal Article
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MHM. Hayashida
M. Hayashida
GMG. M. Madejski
G. M. Madejski
KNK. Nalewajko
K. Nalewajko
MSMarek Sikora
Marek Sikora
AWA. E. Wehrle
A. E. Wehrle
GUG. Umana
G. Umana

14 December 2010 in The Astrophysical Journal Letters
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Journal Article
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IAIván Agudo
Iván Agudo
SJSvetlana Jorstad
Svetlana Jorstad
AMAlan P. Marscher
Alan P. Marscher
VLValeri Larionov
Valeri Larionov
Jose L. GómezJose L. Gómez
Jose L. Gómez
ITIvan Troitskiy
Ivan Troitskiy