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J/MNRAS/458/3786    CSS and GPS radio sources sample          (Jeyakumar, 2016)

Numerical calculations of spectral turnover and synchrotron self-absorption in CSS and GPS radio sources. Jeyakumar S. <Mon. Not. R. Astron. Soc., 458, 3786-3794 (2016)> =2016MNRAS.458.3786J (SIMBAD/NED BibCode)
ADC_Keywords: Radio sources ; QSOs ; Active gal. nuclei ; Redshifts Keywords: radiation mechanisms: non-thermal - galaxies: active - radio continuum: galaxies Abstract: The dependence of the turnover frequency on the linear size is presented for a sample of Giga-hertz Peaked Spectrum and Compact Steep Spectrum radio sources derived from complete samples. The dependence of the luminosity of the emission at the peak frequency with the linear size and the peak frequency is also presented for the galaxies in the sample. The luminosity of the smaller sources evolve strongly with the linear size. Optical depth effects have been included to the 3D model for the radio source of Kaiser to study the spectral turnover. Using this model, the observed trend can be explained by synchrotron self-absorption. The observed trend in the peak-frequency-linear-size plane is not affected by the luminosity evolution of the sources. Description: The sample of sources is derived from the complete samples of CSS and GPS sources available in the literature. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 38 53 Sample of GPS galaxies table2.dat 73 150 Sample of CSS and GPS sources
See also: J/A+AS/131/303 : GHz-Peaked-Spectrum radio sources (Stanghellini+ 1998) J/A+A/363/887 : High frequency peakers. The bright sample (Dallacasa+, 2000) J/A+A/369/380 : CSS/GPS radio sources VLA observations (Fanti+, 2001) J/MNRAS/354/485 : Radio flux of 15-GHz 9C survey (Bolton+, 2004) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 10 A10 --- Source Source name (JHHMM+DDMM) 12 A1 --- Sample Sample (G1) 14- 18 F5.3 --- z ?=- Redshift 19 A1 --- n_z [*] * for photometric redshift 21- 25 I5 MHz nupeak Observed peak frequency 27- 32 F6.4 Jy Speak Flux density at the peak frequency 34- 38 F5.2 [W/Hz/sr] log(Lpeak) Peak luminosity
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 10 A10 --- Source Source name (JHHMM+DDMM) 12- 14 A3 --- Sample Sample (G1) 16- 17 A2 --- Type [GQS EF] Type (1) 19- 25 F7.5 --- z ?=- Redshift 26 A1 --- n_z [*] * for photometric redshift 28 A1 --- l_LAS Limit flag on LAS 29- 35 F7.5 arcsec LAS ?=- Largest angular size 37- 41 I5 MHz nupeak Observed peak frequency 43- 48 F6.3 Jy Speak Flux density at the peak frequency 50- 58 F9.6 kpc LS ?=- Largest linear size 60- 64 F5.2 [W/Hz/sr] log(Lpeak) Peak luminosity 66- 73 A8 --- Ref References for LAS, nupeak and Speak (2)
Note (1): Types as follows: G = galaxy Q = quasar S = star EF = empty field Note (2): References as follows: 1 = O'Dea (1998PASP..110..493O) 2 = Taylor & Vermeulen (1997ApJ...485L...9T) 3 = Fanti et al. (2001, Cat. J/A+A/369/380) 4 = Peck & Taylor (2000ApJ...534...90P) 5 = Gugliucci et al. (2005ApJ...622..136G) 6 = Xu et al. (1995, Cat. J/ApJS/99/297) 7 = Taylor et al. (1994, Cat. J/ApJS/95/345) 8 = Taylor, Wrobel & Vermeulen (1998ApJ...498..619T) 9 = Snellen et al. (2000MNRAS.319..445S) 10 = Edwards & Tingay (2004A&A...424...91E) 11 = Henstock et al. (1995, Cat. J/ApJS/100/1) 12 = Kameno et al. (2001PASJ...53..169K) 13 = Tingay, Edwards & Tzioumis (2003MNRAS.346..327T) 14 = Ojha et al. (2004, Cat. J/AJ/127/3609) 15 = Xiang et al. (2002A&A...385..768X) 16 = Stanghellini, O'Dea & Murphy (1999A&AS..134..309S) 17 = Polatidis et al. (1995, Cat. J/ApJS/98/1) 18 = Kellermann et al. (1998AJ....115.1295K) 19 = Dallacasa et al. (2000, Cat. J/A+A/363/887) 20 = Stanghellini et al. (1998, Cat. J/A+AS/131/303) 21 = Dallacasa et al. (2002A&A...389..115D) 22 = Dallacasa et al. (2002A&A...389..126D) 23 = Tinti et al. (2005A&A...432...31T)
Global notes: Note (G1): Samples as follows: C = The Fanti et al. (1990A&A...231..333F) sample of CSSs from the 3C catalogue. The sources in this sample which do not follow the above criteria are 3C43, 3C186, 3C190, 3C303.1, 3C305.1 and 3C455. These sources have been removed from the current sample. S = The Stanghellini et al. (1998, Cat. J/A+AS/131/303) sample of GPSs. These two samples are well studied. The sources from these samples are listed in OB97. F = The B3-VLA sample of CSS sources (Fanti et al., 2001, Cat. J/A+A/369/380). Information on the structure of the sources is available for most of the sources (Dallacasa et al., 2002A&A...389..115D, 2002A&A...389..126D). W = The sample of GPS galaxies from the WENSS catalogue (Snellen et al., 2000MNRAS.319..445S). A = The sample of CSS and GPS sources in the southern sky (Edwards & Tingay, 2004A&A...424...91E). From this sample only those galaxies listed in Tinti & De Zotti (2006A&A...445..889T) are considered. P = The sample of confirmed CSOs (Peck & Taylor, 2000ApJ...534...90P; Gugliucci et al., 2005ApJ...622..136G) are also used for this study irrespective of the liberal selection criteria on the spectral index, since the CSOs are known to be young radio sources (Readhead et al. 1996ApJ...460..612R; Owsianik & Conway 1998A&A...337...69O; Gugliucci et al., 2005ApJ...622..136G). In this sample, some of the sources show flat spectra (see below) making it difficult to estimate the turnover frequencies. Such sources have been removed from the current sample. D = The galaxies from the sample of High-Frequency Peakers (Dallacasa et al., 2000, Cat. J/A+A/363/887) listed in Tinti & De Zotti (2006A&A...445..889T). H = The sample ofGPS galaxies from the Parkes half-Jy catalogue (Snellen et al., 2002MNRAS.337..981S). B = The galaxies from the Bolton et al. (2004, Cat. J/MNRAS/354/485) sample of GPS sources listed in Tinti & De Zotti (2006A&A...445..889T). L = The GPSs from the CORALZ sample (Snellen et al., 2004MNRAS.348..227S).
History: From electronic version of the journal
(End) Patricia Vannier [CDS] 17-Feb-2017
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