J/ApJ/754/23 Blazar (sub-)mm & γ-ray luminosities (Leon-Tavares+, 2012)
Exploring the relation between (sub-)millimeter radiation and γ-ray
emission in blazars with Planck and Fermi.
Leon-Tavares J., Valtaoja E., Giommi P., Polenta G., Tornikoski M.,
Lahteenmaki A., Gasparrini D., Cutini S.
<Astrophys. J., 754, 23 (2012)>
=2012ApJ...754...23L 2012ApJ...754...23L
ADC_Keywords: QSOs ; X-ray sources ; Gamma rays ; Millimetric/submm sources ;
Active gal. nuclei
Keywords: BL Lacertae objects: general; galaxies: jets; galaxies: nuclei;
gamma rays: galaxies; quasars: general; submillimeter: galaxies
Abstract:
The coexistence of Planck and Fermi satellites in orbit has enabled
the exploration of the connection between the (sub-)millimeter and
γ-ray emission in a large sample of blazars. We find that the
γ-ray emission and the (sub-)mm luminosities are correlated over
five orders of magnitude, Lγ∝L(sub-)mm. However,
this correlation is not significant at some frequency bands when
simultaneous observations are considered. The most significant
statistical correlations, on the other hand, arise when observations
are quasi-simultaneous within two months. Moreover, we find that
sources with an approximate spectral turnover in the middle of the
mm-wave regime are more likely to be strong γ-ray emitters.
These results suggest a physical relation between the newly injected
plasma components in the jet and the high levels of γ-ray
emission.
Description:
In this work we compare Fermi/LAT γ-ray photon fluxes integrated
over three different periods of time with Planck (sub-)mm observations
of a sample of blazars, presented in Giommi et al. (2012,
Cat. J/A+A/541/A160), who considered three samples of blazars with
flux limits in the soft X-rays (count-rates0.1-2.4keV>0.3ct/s), hard
X-rays (S15-150keV>10-11erg/cm2/s), and γ-ray bands with
additional 5GHz flux density limits.
ESA's space mission Planck has been surveying the sky at nine
frequencies since 2009 August (Planck Collaboration et al.
2011A&A...536A...1P 2011A&A...536A...1P). Its payload includes two instruments: the Low
Frequency Instrument operating at 30, 44, and 70GHz while the High
Frequency Instrument observes at 100, 143, 217, 353, 545, and 857GHz.
The (sub-)mm flux densities employed in this work are listed in Table6
of Giommi et al. (2012, Cat. Cat. J/A+A/541/A160).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 148 98 Radio to γ luminosities
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See also:
VIII/88 : Planck Early Release Compact Source Catalogue (Planck, 2011)
J/ApJS/207/4 : Unidentified γ-ray sources. III. Radio (Massaro+, 2013)
J/ApJS/206/13 : Blazars with γ-ray counterparts. II. (Massaro+, 2013)
J/other/RAA/13.259 : gamma-ray Doppler factor for Fermi blazars (Fan+, 2013)
J/A+A/541/A160 : Planck + X/γ observations of blazars (Giommi+, 2012)
J/ApJ/744/177 : VLBA 5GHz observations of Fermi/LAT AGNs (Linford+, 2012)
J/ApJS/194/29 : Observations of blazars at 15GHz (Richards+, 2011)
J/A+A/535/A69 : AGN Fermi/LAT γ-ray and 37GHz fluxes (Nieppola+, 2011)
J/ApJ/743/171 : The 2LAC catalog (Ackermann+, 2011)
J/ApJ/742/27 : 15GHz and jet properties of MOJAVE blazars (Lister+, 2011)
J/ApJ/741/30 : Radio/γ-ray correlation in AGN (Ackermann+, 2011)
J/ApJ/726/16 : γ-ray loud blazars (Linford+, 2011)
J/ApJ/722/520 : Gamma-ray light curves of Fermi blazars (Abdo+, 2010)
J/ApJ/716/30 : SED of Fermi bright blazars (Abdo+, 2010)
J/ApJ/709/1407 : SED of the Fermi blazars (Li+, 2010)
J/A+A/508/107 : WMAP3 catalogue (Giommi+, 2009)
J/A+A/379/755 : Radio data of X- and gamma-ray loud blazars (Venturi+, 2001)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- JName J2000 designation (HHMM+DDMM)
11- 30 A20 --- Name Source name
32- 38 F7.3 deg RAdeg Right ascension in decimal degrees (J2000)
40- 46 F7.3 deg DEdeg Declination in decimal degrees (J2000)
48- 52 F5.3 --- z [0.006/3.4] Redshift
54 A1 --- l_logL30 Limit flag on logL30 (1)
56- 60 F5.2 [10-7W] logL30 [40.2/46.3] Log of 30GHz luminosity (2)
62 A1 --- l_logL44 Limit flag on logL44 (1)
64- 68 F5.2 [10-7W] logL44 [40.5/46.4] Log of 44GHz luminosity (2)
70 A1 --- l_logL70 Limit flag on logL70 (1)
72- 76 F5.2 [10-7W] logL70 [40.6/46.6] Log of 70GHz luminosity (2)
78 A1 --- l_logL100 Limit flag on logL100 (1)
80- 84 F5.2 [10-7W] logL100 [40.3/46.8] Log of 100GHz luminosity (2)
86 A1 --- l_logL143 Limit flag on logL143 (1)
88- 92 F5.2 [10-7W] logL143 [40.3/46.9] Log of 143GHz luminosity (2)
94 A1 --- l_logL217 Limit flag on logL217 (1)
96-100 F5.2 [10-7W] logL217 [40.5/47] Log of 217GHz luminosity (2)
102 A1 --- l_logL353 Limit flag on logL353 (1)
104-108 F5.2 [10-7W] logL353 [41.5/47.2] Log of 353GHz luminosity (2)
110 A1 --- l_logL545 Limit flag on logL545 (1)
112-116 F5.2 [10-7W] logL545 [41.8/47.4] Log of 545GHz luminosity (2)
118 A1 --- l_logL857 Limit flag on logL857 (1)
120-124 F5.2 [10-7W] logL857 [42.3/47.9] Log of 857GHz luminosity (2)
126 A1 --- l_logLgs Limit flag on logLgs (1)
128-132 F5.2 [10-7W] logLgs [42.4/49.8]? Mean log of γ-ray
luminosity over 2 weeks ("sim") (2)(3)
134 A1 --- l_logLgq Limit flag on logLgq (1)
136-140 F5.2 [10-7W] logLgq [42.7/49.8]? Mean log of γ-ray
luminosity over 2 months ("qua") (2)(3)
142 A1 --- l_logLga Limit flag on logLga (1)
144-148 F5.2 [10-7W] logLga [41.7/49.5] Mean log of γ-ray
luminosity over 27 months ("ave") (2)(3)
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Note (1): For those cases where non-detection of the sources was possible, we
estimate an upper limit of the luminosity assuming the average photon
spectral index for our sample, <Γ≥1.38.
Note (2): All luminosities are in units of erg/s and have been computed by using
the following cosmology H0=71km/s/Mpc, Ωm=0.27, and
ΩΛ=0.73.
Note (3): γ-ray luminosities using Fermi data averaged over three
different periods of time: 2 weeks ("sim"), 2 months ("qua"), and
27 months ("ave"; from 2008 August to 2010 November).
See section 2, 3.3 and 3.4 for details.
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History:
From electronic version of the journal
(End) Emmanuelle Perret [CDS] 26-Feb-2014