J/A+A/488/867 Synchrotron peak frequency of 135 AGN (Nieppola+, 2008)
Blazar sequence - an artefact of Doppler boosting.
Nieppola E., Valtaoja E., Tornikoski M., Hovatta T., Kotiranta M.
<Astron. Astrophys., 488, 867-872 (2008)>
=2008A&A...488..867N 2008A&A...488..867N
ADC_Keywords: Active gal. nuclei ; QSOs ; Energy distributions
Keywords: galaxies: active - galaxies: BL Lacertae objects: general -
galaxies: quasars: general - radiation mechanisms: non-thermal
Abstract:
The blazar sequence is a scenario in which the bolometric luminosity
of the blazar governs the appearance of its spectral energy
distribution. The most prominent result is the significant negative
correlation between the synchrotron peak frequencies and the
synchrotron peak luminosities of the blazar population.
Observational studies of the blazar sequence have, in general,
neglected the effect of Doppler boosting. We study the dependence
of both the synchrotron peak frequency and luminosity with
Doppler-corrected quantities.
We determine the spectral energy distributions of 135 radio-bright AGN
and find the best-fit parabolic function for the distribution to
quantify their synchrotron emission. The corresponding measurements of
synchrotron peak luminosities and frequencies are Doppler-corrected
with a new set of Doppler factors calculated from variability data.
The relevant correlations for the blazar sequence are determined for
these intrinsic quantities.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 70 135 The sample and the observational synchrotron
peak frequencies obtained in this work
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Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- Name Source Name (HHMM+DDd or HHMM+DDMM)
11- 22 A12 --- OName Other name
24- 25 I2 h RAh Right ascension (J2000)
27- 28 I2 min RAm Right ascension (J2000)
30- 34 F5.2 s RAs Right ascension (J2000)
36 A1 --- DE- Declination sign (J2000)
37- 38 I2 deg DEd Declination (J2000)
40- 41 I2 arcmin DEm Declination (J2000)
43- 47 F5.2 arcsec DEs Declination (J2000)
49 A1 --- Jy [*] * when in 1.2Jy AGN sample
51- 53 A3 --- Class AGN Classification (3)
55- 59 F5.2 [Hz] lognup ? Observational synchrotron peak frequency (1)
61 A1 --- n_lognup [1] Determination from highest flux density (2)
64- 68 F5.3 --- z ? Redshift
70 A1 --- Bl [*] * when in Blazar sample
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Note (1): The values of νp listed here have been determined directly
from the SEDs and are not corrected for redshift nor for Doppler boosting.
Note (2): 1 means that logνp was determined from the highest flux
density measurement of the synchrotron component of the SED (see Sect.3.1)
Note (3): Classes are as follows:
HPQ = highly polarized quasars (≥3%)
LPQ = low polarization quasars (≥3%)
QSO = non-polarized quasars
BLO = BL Lac objects
GAM = radio galaxies
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 14-Nov-2008