Calibrating The Power Of Relativistic Jets

Foschini, L.; Lister, Matthew L.; Hovatta, T.; Kovalev, Y. Y.; Romano, P.; Vercellone, S.; Lähteenmäki, A.; Savolainen, Tuomas; Tornikoski, M.; Angelakis, Emmanouil; Berton, M.; Braito, V.; Ciroi, S.; Kadler, M.; Burd, P. R.

doi:10.22323/1.354.0070

Cited by 2 publications

(4 citation statements)

References 24 publications

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“…P 44 (10) By adopting the typical values suggested by Blandford and Königl [27] for k eq = 0.5, ∆ = 5, and Λ = 3, we obtain k 1 ∼ 24.5. Therefore,…”

Section: The Blandford and Königl Modelmentioning

confidence: 77%

“…Then, by studying these X-ray cavities of a sample of radio galaxies in clusters, Bîrzan et al [35] where P 200−400 MHz is the radio power as measured at 200-400 MHz [erg/s]. The authors also proposed a relationship with the radio power as measured at 1.4 GHz, but this is less reliable [10,35,36], and therefore, we do not consider it.…”

Section: Kinetic Power Estimated From the Extended Emissionmentioning

confidence: 99%

“…We too made a preliminary study by comparing the interpretations of the same method by different authors [10]. Therefore, we compared the radiative power derived from the γ-ray luminosity and the Lorentz and Doppler factors from radio observations at different frequencies from [11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

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The Power of Relativistic Jets: A Comparative Study

Foschini,

Dalla Barba,

Tornikoski

et al. 2024

Universe

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We present the results of a comparison between different methods to estimate the power of relativistic jets from active galactic nuclei (AGN). We selected a sample of 32 objects (21 flat-spectrum radio quasars, 7 BL Lacertae objects, 2 misaligned AGN, and 2 changing-look AGN) from the very large baseline array (VLBA) observations at 43 GHz of the Boston University blazar program. We then calculated the total, radiative, and kinetic jet power from both radio and high-energy gamma-ray observations, and compared the values. We found an excellent agreement between the radiative power calculated by using the Blandford and Königl model with 37 or 43 GHz data and the values derived from the high-energy γ-ray luminosity. The agreement is still acceptable if 15 GHz data are used, although with a larger dispersion, but it improves if we use a constant fraction of the γ-ray luminosity. We found a good agreement also for the kinetic power calculated with the Blandford and Königl model with 15 GHz data and the value from the extended radio emission. We also propose some easy-to-use equations to estimate the jet power.

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“…P 44 (10) By adopting the typical values suggested by Blandford and Königl [27] for k eq = 0.5, ∆ = 5, and Λ = 3, we obtain k 1 ∼ 24.5. Therefore,…”

Section: The Blandford and Königl Modelmentioning

confidence: 77%

Section: Kinetic Power Estimated From the Extended Emissionmentioning

confidence: 99%

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The Power of Relativistic Jets: A Comparative Study

Foschini,

Dalla Barba,

Tornikoski

et al. 2024

Universe

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“…There are many ways to estimate the power emitted by a relativistic jet, but there are also serious problems of consistency among the various methods (e.g., [1]). In 2019, we started a program aimed at calibrating the main methods to estimate the jet power and presented some preliminary results [2]. The need to compile a suitable list of gamma-ray emitting jetted active galactic nuclei (AGN) soon became apparent as the gamma-ray luminosity is a reliable proxy of the radiative jet power [3,4].…”

Section: Introduction: Why This Work?mentioning

confidence: 99%

A New Sample of Gamma-Ray Emitting Jetted Active Galactic Nuclei—Preliminary Results

et al. 2021

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We are compiling a new list of gamma-ray jetted active galactic nuclei (AGN), starting from the fourth catalog of point sources of the Fermi Large Area Telescope (LAT). Our aim is to prepare a list of jetted AGN with known redshifts and classifications to be used to calibrate jet power. We searched in the available literature for all the published optical spectra and multiwavelength studies useful to characterize the sources. We found new, missed, or even forgotten information leading to a substantial change in the redshift values and classification of many sources. We present here the preliminary results of this analysis and some statistics based on the gamma-ray sources with right ascension within the interval 0h--12h (J2000). Although flat-spectrum radio quasars and BL Lac objects are still the dominant populations, there is a significant increase in the number of other objects, such as misaligned AGN, narrow-line Seyfert 1 galaxies, and Seyfert galaxies. We also introduced two new classes of objects: changing-look AGN and ambiguous sources. About one third of the sources remain unclassified.

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Calibrating The Power Of Relativistic Jets

Cited by 2 publications

References 24 publications

The Power of Relativistic Jets: A Comparative Study

The Power of Relativistic Jets: A Comparative Study

A New Sample of Gamma-Ray Emitting Jetted Active Galactic Nuclei—Preliminary Results

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