The synchrotron spectra of inhomogeneous radio sources

Artyukh, V. S.; Chernikov, P. A.

doi:10.1134/1.1336597

Cited by 16 publications

(13 citation statements)

References 8 publications

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“…According to Condon & Dressel (1973); de Bruyn (1976); & Artyukh & Chernikov (2001) the spectrum of such a synchrotron source consists of three parts. At high frequencies the flux density is S ∼ ν −α in transparent wave range (ν > ν hf ), where ν hf is the frequency of the high-frequency break in the spectrum.…”

Section: The Methods Of Physical Parameter Estimationsmentioning

confidence: 99%

“…The parameter k H is determined by the frequency interval length ν hf -ν lf . Thus it can be obtained from the model catalog (Artyukh & Chernikov 2001) if ν hf − ν lf is known from observations. We have from observations the spectral index α lf (within ν lf < ν < ν hf range).…”

Section: The Methods Of Physical Parameter Estimationsmentioning

confidence: 99%

“…(3). As shown in Artyukh & Chernikov (2001), parameters m and n belong to the finite interval of values that corresponds to physically realizable source models. To simplify the work we choose the model with a uniform distribution of particles, i.e.…”

Section: The Methods Of Physical Parameter Estimationsmentioning

confidence: 99%

“…Thus we derive m directly from (3). As shown in Artyukh & Chernikov (2001) in this case we deal with the source model with minimum magnetic field H(0) and maximum particle density N 0 . It should be noted that another marginal model with m = 0 offers maximum magnetic field that depends on the model itself.…”

Section: The Methods Of Physical Parameter Estimationsmentioning

confidence: 99%

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Synchrotron self-absorption in the GPS radio galaxy B0108+388

Artyukh

Chernikov

Tyul’bashev

2008

A&A

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Context. The compact radio source in the nucleus of the GPS radio galaxy B0108+388 consists of two jets that have spectra that turn over at frequecies lower than ∼5 GHz. There is evidence that the spectral turnover in B0108+388 results from free-free absorption by non-uniform thermal plasma in central tens of parsecs. Aims. To reveal the real cause of the low frequency cutoff in the jet spectra, it is necessary to consider different mechanisms and, in particular, syncrotron self-absorption. Methods. We suggest that spectral turnovers at low frequencies of the jets are caused by synchrotron self-absorption. Estimations of physical parameters of these jets were obtained with a method based on a non-uniform synchrotron source model. Results. We find that magnetic fields in these jets are nearly uniform with 10 −2 < H ⊥ < 10 −1 G and with relativistic electron density 10 1 < n e < 10 2 cm −3 . The relativistic electron energy is higher everywhere in the jets than the magnetic field energy, but by taking the estimated uncertainties into account it is possible that energy equipartition is in effect. We compare the physical conditions in the jets and in the nuclei of classical doubles. Conclusions. We present evidence that the spectral turnover in the B0108+388 results from synchrotron self-absorption.

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Section: The Methods Of Physical Parameter Estimationsmentioning

confidence: 99%

Section: The Methods Of Physical Parameter Estimationsmentioning

confidence: 99%

Section: The Methods Of Physical Parameter Estimationsmentioning

confidence: 99%

Section: The Methods Of Physical Parameter Estimationsmentioning

confidence: 99%

See 2 more Smart Citations

Synchrotron self-absorption in the GPS radio galaxy B0108+388

Artyukh

Chernikov

Tyul’bashev

2008

A&A

Self Cite

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show abstract

“…The details of spectra of inhomogeneous sources are discussed in the work of Artyukh & Chernikov (2001). To avoid the influence of a possibly inhomogeneous magnetic field we tried to choose for calculations the observations in the opaque region of the spectrum but near the maximum.…”

Section: Physical Conditions In the Compact Structures Of The Sourcesmentioning

confidence: 99%