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J/ApJ/378/65        8.4GHz observations of compact starbursts   (Condon+ 1991)

Compact starbursts in ultraluminous infrared galaxies. Condon J.J., Huang Z.-P., Yin Q.F., Thuan T.X. <Astrophys. J. 378, 65 (1991)> =1991ApJ...378...65C
ADC_Keywords: Galaxies, IR ; Galaxies, radio Keywords: galaxies: stellar content - galaxies: structure - infrared : sources - interferometry - radio sources: galaxies - stars: formation Abstract: The 40 ultraluminous (log(LFIR/L≥11.25) galaxies in the IRAS Bright Galaxy Sample of sources stronger than S=5.24Jy at λ=60µm were mapped with approximately 0.25-arcsec resolution at 8.44GHz. Twenty-five contain diffuse radio sources obeying the FIR-radio correlation; these are almost certainly starburst galaxies. Fourteen other galaxies have nearly blackbody FIR spectra with color temperatures between 60 and 80K so their (unmeasured) FIR angular sizes must exceed approximately 0.25-arcsec, yet they contain compact (but usually resolved) radio sources smaller than this limit. The unique radio and FIR properties of these galaxies can be modeled by ultraluminous nuclear starbursts so dense that they are optically thick to free-free absorption at ν∼1.49GHz and dust absorption at λ∼25µm. Only one galaxy (UGC 08058 = Mrk 231) is a dominated by a variable radio source too compact to be an ultraluminous starburst; it must be powered by a 'monster'. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 65 40 Far-Infrared characteristics of the sample galaxies table2.dat 98 52 Radio data for the sample galaxies (N=52 obs. for 40 galaxies)
See also: J/ApJS/143/315 : IRAS 1Jy sample of ultraluminous galaxies. II (Veilleux+ 2002) J/ApJS/143/277 : IRAS 1Jy sample of ultraluminous galaxies. I. (Kim+, 2002) J/ApJS/131/185 : The FIRST sample of ultraluminous IR galaxies (Stanford+ 2000) J/ApJ/522/113 : 1Jy IRAS galaxies optical spectroscopy (Veilleux+, 1999) J/A+A/409/115 : VLA imaging of IRAS 1 Jy ULIRG sample (Nagar+, 2003) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 13 A13 --- Name Galaxy name 16 A1 --- l_S12um Limit flag on S12um 17- 20 F4.2 Jy S12um Flux density at 12µm 22- 26 F5.2 Jy S25um Flux density at 25µm 28- 33 F6.2 Jy S60um Flux density at 60µm 35- 40 F6.2 Jy S100um Flux density at 100µm 42- 45 F4.2 --- C60mu 60µm spectral curvature (1) 48- 52 F5.1 Mpc Dist Distance based on H0=75km/s/Mpc 55- 59 F5.2 [solLum] logLFIR Absolute far-infrared luminosity 61 A1 --- l_Size [~] Limt flag on Size 62- 65 F4.2 arcsec Size ? Angular diameter of a circular blackbody matching the observed flux densities at 25, 60 and 100µm.
Note (1): 60µm spectral curvature: C60um = alpha(25um, 60um) - alpha(60um, 100um), with alpha the spectral index (-dlog(S)/dlogν)
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 13 A13 --- Name Galaxy name 16- 20 F5.1 mJy S1.49GHz VLA flux density at 1.49GHz 22- 25 F4.2 --- q Logarithmic FIR/radio (1.49GHz) flux-density ratio 27- 30 F4.2 arcsec FWHMmaj ? FWHM major axis of the Gaussian beam (1) 32- 34 F3.2 arcsec FWHMmin ? FWHM minor axis of the Gaussian beam (1) 36- 40 F5.1 mJy S8.44GHz ? Total flux density at 8.44GHz 41 A1 --- u_S8.44GHz [)] Uncertainty flag on S8.44GHz 42- 46 F5.2 --- Sp-Index ? Spectral index between 1.49 and 8.44GHz 47 A1 --- n_Sp-Index Note on Sp-Index (2) 49- 50 I2 h RAh ? Right ascension (B1950) 52- 53 I2 min RAm ? Right ascension (B1950) 55- 59 F5.2 s RAs ? Right ascension (B1950) 61 A1 --- DE- Declination sign (B1950) 62- 63 I2 deg DEd ? Declination (B1950) 65- 66 I2 arcmin DEm ? Declination (B1950) 68- 71 F4.1 arcsec DEs ? Declination (B1950) 73- 77 F5.1 mJy Sp ? Peak flux density at 8.44GHz 79- 83 F5.1 mJy St ? Integrated flux density at 8.44GHz 85 A1 --- l_FWHMmaj Limit flag on FWHMmaj 86- 89 F4.2 arcsec dFWHMmaj ? Deconvolved FWHM major axis 91- 93 F3.2 arcsec dFWHMmin ? Deconvolved FWHM minor axis 95 A1 --- l_logTb limit flag on logTb 96- 98 F3.1 [K] logTb ? 8.44GHz brightness temperature
Note (1): FWHM major and minor axis of the Gaussian beam used to restore the 8.44GHz map. The major-axis position angle is always PA=0°. Note (2): Note in Sp-Index: ): uncertain value ]: value based on flux density measured at 1.49GHz and frequencies other than 8.44GHz: NGC 0695: S4.86GHz = 24mJy NGC 1614: S4.86GHz = 31mJy NGC 3690: S4.85GHz = 300mJy NGC 5256: S10.7GHz = 28mJy UGC 09618: S4.86GHz = 35mJy NGC 6285/6: S4.85GHz = 53mJy NGC 7469: S8.1GHz = 58mJy
History: Prepared via OCR. Acknowledgements: From Heinz A. Andernach (R528 in his list)
(End) Patricia Bauer [CDS] 27-Nov-2003
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

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