On the Intrinsic Jet Properties of Fermi-detected Blazars

T. Savolainen; D. C. Homan; T. Hovatta; M. Kadler; Y. Y. Kovalev; M. L. Lister; E. Ros; J. A. Zensus

On the Intrinsic Jet Properties of Fermi-detected Blazars

T. Savolainen, D. C. Homan, T. Hovatta, M. Kadler, Y. Y. Kovalev, M. L. Lister, E. Ros, J. A. Zensus

Tutkimustuotos: Artikkeli kirjassa/konferenssijulkaisussa › Conference article in proceedings › Scientific

Abstrakti

We report on an analysis of intrinsic jet properties between sources detected by the Fermi Gamma-ray Space Telescope during its first three months of science operations and those not detected in a sample 62 blazars. By combining high-resolution VLBI images and millimetre-wavelength flux density monitoring data, we have estimated their jet Doppler factors, Lorentz factors, and viewing angles in the observer’s frame and in the frame comoving with the jet. The analysis shows that, in addition to having on average higher variability Doppler factors, the blazars detected by the Fermi have a distribution of comoving frame viewing angles that is significantly narrower than that of the γ-ray weak blazars and centred roughly perpendicular to the jet axis. The lack of γ-ray bright blazars at small comoving frame viewing angles hints that their γ-ray emission may be intrinsically anisotropic or depend on the Lorentz factor.

Alkuperäiskieli	Englanti
Otsikko	Accretion and Ejection in AGN: a Global View
Alaotsikko	Proceedings of a workshop held June 22-26, 2009 in Como, Italy
Toimittajat	Laura Maraschi, Gabriele Ghisellini, Roberto Della Ceca, Fabrizio Tavecchio
Kustantaja	Astronomical Society of the Pacific
Sivut	306-307
ISBN (elektroninen)	978-1-58381-735-3
ISBN (painettu)	978-1-58381-734-6
Tila	Julkaistu - 2010
OKM-julkaisutyyppi	B3 Vertaisarvioimaton artikkeli konferenssijulkaisussa
Tapahtuma	Conference on Accretion and Ejection in AGN: A Global View - Como, Italia Kesto: 22 kesäk. 2009 → 26 kesäk. 2009

Julkaisusarja

Nimi	Astronomical society of the pacific Conference Series
Kustantaja	Astronomical Society of the Pacific
Vuosikerta	427
ISSN (painettu)	1050-3390

Conference

Conference	Conference on Accretion and Ejection in AGN: A Global View
Maa/Alue	Italia
Kaupunki	Como
Ajanjakso	22/06/2009 → 26/06/2009

Pääsy asiakirjaan

http://adsabs.harvard.edu/abs/2010ASPC..427..306S

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Savolainen, T., Homan, D. C., Hovatta, T., Kadler, M., Kovalev, Y. Y., Lister, M. L., Ros, E., & Zensus, J. A. (2010). On the Intrinsic Jet Properties of Fermi-detected Blazars. teoksessa L. Maraschi, G. Ghisellini, R. Della Ceca, & F. Tavecchio (Toimittajat), Accretion and Ejection in AGN: a Global View: Proceedings of a workshop held June 22-26, 2009 in Como, Italy (Sivut 306-307). (Astronomical society of the pacific Conference Series; Vuosikerta 427). Astronomical Society of the Pacific. http://adsabs.harvard.edu/abs/2010ASPC..427..306S

Savolainen, T. ; Homan, D. C. ; Hovatta, T. et al. / On the Intrinsic Jet Properties of Fermi-detected Blazars. Accretion and Ejection in AGN: a Global View: Proceedings of a workshop held June 22-26, 2009 in Como, Italy. Toimittaja / Laura Maraschi ; Gabriele Ghisellini ; Roberto Della Ceca ; Fabrizio Tavecchio. Astronomical Society of the Pacific, 2010. Sivut 306-307 (Astronomical society of the pacific Conference Series).

@inproceedings{c7c65b31825d4d72bdeea02008afe5c2,

title = "On the Intrinsic Jet Properties of Fermi-detected Blazars",

abstract = "We report on an analysis of intrinsic jet properties between sources detected by the Fermi Gamma-ray Space Telescope during its first three months of science operations and those not detected in a sample 62 blazars. By combining high-resolution VLBI images and millimetre-wavelength flux density monitoring data, we have estimated their jet Doppler factors, Lorentz factors, and viewing angles in the observer{\textquoteright}s frame and in the frame comoving with the jet. The analysis shows that, in addition to having on average higher variability Doppler factors, the blazars detected by the Fermi have a distribution of comoving frame viewing angles that is significantly narrower than that of the γ-ray weak blazars and centred roughly perpendicular to the jet axis. The lack of γ-ray bright blazars at small comoving frame viewing angles hints that their γ-ray emission may be intrinsically anisotropic or depend on the Lorentz factor.",

author = "T. Savolainen and Homan, {D. C.} and T. Hovatta and M. Kadler and Kovalev, {Y. Y.} and Lister, {M. L.} and E. Ros and Zensus, {J. A.}",

year = "2010",

language = "English",

isbn = "978-1-58381-734-6",

series = "Astronomical society of the pacific Conference Series",

publisher = "Astronomical Society of the Pacific",

pages = "306--307",

editor = "Laura Maraschi and Gabriele Ghisellini and {Della Ceca}, Roberto and Fabrizio Tavecchio",

booktitle = "Accretion and Ejection in AGN: a Global View",

address = "United States",

note = "Conference on Accretion and Ejection in AGN: A Global View ; Conference date: 22-06-2009 Through 26-06-2009",

}

Savolainen, T, Homan, DC, Hovatta, T, Kadler, M, Kovalev, YY, Lister, ML, Ros, E & Zensus, JA 2010, On the Intrinsic Jet Properties of Fermi-detected Blazars. julkaisussa L Maraschi, G Ghisellini, R Della Ceca & F Tavecchio (toim), Accretion and Ejection in AGN: a Global View: Proceedings of a workshop held June 22-26, 2009 in Como, Italy. Astronomical society of the pacific Conference Series, Vuosikerta 427, Astronomical Society of the Pacific, Sivut 306-307, Conference on Accretion and Ejection in AGN: A Global View, Como, Italia, 22/06/2009. <http://adsabs.harvard.edu/abs/2010ASPC..427..306S>

On the Intrinsic Jet Properties of Fermi-detected Blazars. / Savolainen, T.; Homan, D. C.; Hovatta, T. et al.
Accretion and Ejection in AGN: a Global View: Proceedings of a workshop held June 22-26, 2009 in Como, Italy. toim. / Laura Maraschi; Gabriele Ghisellini; Roberto Della Ceca; Fabrizio Tavecchio. Astronomical Society of the Pacific, 2010. s. 306-307 (Astronomical society of the pacific Conference Series; Vuosikerta 427).

Tutkimustuotos: Artikkeli kirjassa/konferenssijulkaisussa › Conference article in proceedings › Scientific

TY - GEN

T1 - On the Intrinsic Jet Properties of Fermi-detected Blazars

AU - Savolainen, T.

AU - Homan, D. C.

AU - Hovatta, T.

AU - Kadler, M.

AU - Kovalev, Y. Y.

AU - Lister, M. L.

AU - Ros, E.

AU - Zensus, J. A.

PY - 2010

Y1 - 2010

N2 - We report on an analysis of intrinsic jet properties between sources detected by the Fermi Gamma-ray Space Telescope during its first three months of science operations and those not detected in a sample 62 blazars. By combining high-resolution VLBI images and millimetre-wavelength flux density monitoring data, we have estimated their jet Doppler factors, Lorentz factors, and viewing angles in the observer’s frame and in the frame comoving with the jet. The analysis shows that, in addition to having on average higher variability Doppler factors, the blazars detected by the Fermi have a distribution of comoving frame viewing angles that is significantly narrower than that of the γ-ray weak blazars and centred roughly perpendicular to the jet axis. The lack of γ-ray bright blazars at small comoving frame viewing angles hints that their γ-ray emission may be intrinsically anisotropic or depend on the Lorentz factor.

AB - We report on an analysis of intrinsic jet properties between sources detected by the Fermi Gamma-ray Space Telescope during its first three months of science operations and those not detected in a sample 62 blazars. By combining high-resolution VLBI images and millimetre-wavelength flux density monitoring data, we have estimated their jet Doppler factors, Lorentz factors, and viewing angles in the observer’s frame and in the frame comoving with the jet. The analysis shows that, in addition to having on average higher variability Doppler factors, the blazars detected by the Fermi have a distribution of comoving frame viewing angles that is significantly narrower than that of the γ-ray weak blazars and centred roughly perpendicular to the jet axis. The lack of γ-ray bright blazars at small comoving frame viewing angles hints that their γ-ray emission may be intrinsically anisotropic or depend on the Lorentz factor.

M3 - Conference article in proceedings

SN - 978-1-58381-734-6

T3 - Astronomical society of the pacific Conference Series

SP - 306

EP - 307

BT - Accretion and Ejection in AGN: a Global View

A2 - Maraschi, Laura

A2 - Ghisellini, Gabriele

A2 - Della Ceca, Roberto

A2 - Tavecchio, Fabrizio

PB - Astronomical Society of the Pacific

T2 - Conference on Accretion and Ejection in AGN: A Global View

Y2 - 22 June 2009 through 26 June 2009

ER -

Savolainen T, Homan DC, Hovatta T, Kadler M, Kovalev YY, Lister ML et al. On the Intrinsic Jet Properties of Fermi-detected Blazars. julkaisussa Maraschi L, Ghisellini G, Della Ceca R, Tavecchio F, toimittajat, Accretion and Ejection in AGN: a Global View: Proceedings of a workshop held June 22-26, 2009 in Como, Italy. Astronomical Society of the Pacific. 2010. s. 306-307. (Astronomical society of the pacific Conference Series).

On the Intrinsic Jet Properties of Fermi-detected Blazars

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