Access to Astronomical Catalogues

← Click to display the menu
J/ApJ/686/859     Radio sources at 0.327, 1.4, 4.5, 8.5GHz   (Birzan+, 2008)

Radiative efficiency and content of extragalactic radio sources: toward a universal scaling relation between jet power and radio power. Birzan L., McNamara B.R., Nulsen P.E.J., Carilli C.L., Wise M.W. <Astrophys. J., 686, 859-880 (2008)> =2008ApJ...686..859B
ADC_Keywords: Clusters, galaxy ; Galaxies, radio ; Radio continuum Keywords: galaxies: active - galaxies: clusters: general - radio continuum: galaxies - X-rays: galaxies - X-rays: galaxies: clusters Abstract: We present an analysis of the energetics and particle content of the lobes of 24 radio galaxies at the cores of cooling clusters. The radio lobes in these systems have created visible cavities in the surrounding hot, X-ray-emitting gas, which allow direct measurement of the mechanical jet power of radio sources over six decades of radio luminosity, independently of the radio properties themselves. We find that jet (cavity) power increases with radio synchrotron power approximately as Pjet∼Lβradio, where 0.35≤β≤0.70 depending on the bandpass of measurement and state of the source. Furthermore, we place limits on the magnetic field strengths and particle content of the radio lobes using a variety of X-ray constraints. We find that the lobe magnetic field strengths vary between a few to several tens of microgauss depending on the age and dynamical state of the lobes. Description: The sample consists of 22 galaxy clusters, one galaxy group (HCG 62), and one elliptical galaxy (M84). In order to have radio data at 327MHz, 1.4GHz, 4.5GHz, and 8.5GHz, we observed 13 objects that did not have VLA archival data at one or more of these frequencies. The observations that we used for each frequency are given in Appendix A (table 6 and 7). File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 120 37 Radio fluxes and spectral indices table6.dat 131 179 Summary of radio observations table7.dat 79 92 Radio images properties
See also: J/AJ/130/1977 : FIRST-Optical-VLA survey for lensed radio lobes (Haarsma+, 2005) J/AJ/109/853 : VLA survey of Abell clusters. IV. (Ledlow+ 1995) J/ApJS/107/175 : Steep-spectrum radio galaxies VLA imaging (Rhee+, 1996) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 17 A17 --- Name Source name 19- 24 F6.4 --- z Redshift 26- 36 A11 --- Comp Component (Lobes or Total) 38- 45 F8.3 Jy S327 ? VLA radio flux at 327MHz (1) 47- 53 F7.3 Jy e_S327 ? S327 uncertainty 55- 63 F9.4 Jy S1400 ? VLA radio flux at 1.4GHz (1) 65- 71 F7.4 Jy e_S1400 ? S1400 uncertainty 72 A1 --- f_S1400 [b] Indicates flux from litterature 74- 82 F9.5 Jy S4500 ? VLA radio flux at 4.5GHz (1) 84- 91 F8.5 Jy e_S4500 ? S4500 uncertainty 93-101 F9.5 Jy S8500 ? VLA radio flux at 8.5GHz (1) 103-110 F8.5 Jy e_S8500 ? S8500 uncertainty 112-115 F4.2 --- alpha ? The spectral index (2) 117-120 F4.2 --- e_alpha ? The spectral index uncertainty
Note (1): When we have multiple final images of different resolutions (see Table 7), the lower resolution image was used to measure the flux, with the exceptions of A133 and Hydra A. Hydra A: 74 and 327MHz radio maps are from Lane et al. (2004AJ....127...48L); Stotal74=441±20Jy, Sinner-lobes74=219±10Jy, Souter-lobes74=221±30Jy. A2597: 327MHz radio map is from Clarke et al. (2005ApJ...625..748C). Note (2): The spectral index, α, was calculated using the fluxes at the two lowest available frequencies assuming a power-law spectrum (Sν∝ν).
Byte-by-byte Description of file: table6.dat
Bytes Format Units Label Explanations
1- 17 A17 --- Name Source name 19- 24 F6.1 MHz Freq1 Frequency of observation(s) (lower vound) 26 A1 --- --- [/] 27- 33 F7.2 MHz Freq2 ? Frequency of observation(s) 35 A1 --- f_Freq1 [*] Indicates our observations 37- 46 A10 MHz Bw Beam width(s) 48- 51 A4 --- Array VLA configuration 53- 78 A26 --- Obs Date(s) of the observation(s) 80- 87 A8 --- Exp Duration of integration time on source 89-104 A16 --- FluxC Flux calibrator(s) used 106-131 A26 --- PhaseC Phase calibrator(s) used
Byte-by-byte Description of file: table7.dat
Bytes Format Units Label Explanations
1- 17 A17 --- Name Source name 19- 26 F8.3 MHz Freq Frequency 28 A1 --- f_Freq [ab] Flag on Freq (1) 30- 44 A15 --- Array VLA configuration 46- 56 A11 arcsec Res Resolution 58- 63 F6.2 deg PosAng Position angle 65- 72 F8.3 mJy RMS RMS noise in units of mJy/beam 74- 79 A6 --- Ref Reference(s) (2)
Note (1): Flag as follows: a = radio map from Lane et al. (2004AJ....127...48L). b = radio map from Clarke et al. (2005ApJ...625..748C). Note (2): References as follows: 1 = Burns (1990AJ.....99...14B); 2 = Carilli et al. (1991ApJ...383..554C); 3 = Clarke et al. (2005ApJ...625..748C); 4 = Cohen et al. (2005ApJ...620L...5C); 5 = Dreher et al. (1987ApJ...316..611D); 6 = Fabian et al. (2002MNRAS.331..369F); 7 = Ge & Owen (1993AJ....105..778G); 8 = Ge & Owen (1994AJ....108.1523G); 9 = Giovannini et al. (1998ApJ...493..632G); 10 = Gitti et al. (2006A&A...448..853G); 11 = Hines et al. (1989ApJ...347..713H); 12 = Laing & Bridle (1987MNRAS.228..557L); 13 = Lane et al. (2004AJ....127...48L); 14 = Reiprich, T., Kempner, J., & Soker, N. (eds. 2003, The Riddle of Cooling Flows in Galaxies and Clusters of Galaxies); 15 = McNamara et al. (2005Natur.433...45M); 16 = Owen et al. (2000ApJ...543..611O); 17 = Parma et al. (1986A&AS...64..135P); 18 = Pedlar et al. (1990MNRAS.246..477P); 19 = Sarazin et al. (1995ApJ...447..559S); 20 = Sarazin et al. (1995ApJ...451..125S); 21 = Slee et al. (2001AJ....122.1172S); 22 = Sun et al. (2003ApJ...587..619S); 23 = Taylor et al. (1990ApJ...360...41T); 24 = Taylor et al. (1994AJ....107.1942T); 25 = Taylor et al. (2002MNRAS.334..769T); 26 = Taylor et al. (2006MNRAS.365..705T); 27 = van Breugel et al. (1984ApJ...276...79V); 28 = Zhao et al. (1993ApJ...416...51Z); 29 = Young (2004PhDT.......430Y);
History: From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 05-Jan-2011
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

catalogue service

© UDS/CNRS

Contact