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J/ApJ/252/102       Radio sources in bright spiral galaxies. II. (Condon+, 1982)

Strong radio sources in bright spiral galaxies. II. Rapid star formation and galaxy-galaxy interactions. Condon J.J., Condon M.A., Gisler G., Puschell J.J. <Astrophys. J. 252, 102 (1982)> =1982ApJ...252..102C
ADC_Keywords: Radio sources Keywords: interferometry - galaxies : nuclei - galaxies : structure - radio sources : galaxies - radio sources : spectra Abstract: Statistically complete samples comprising 33 bright spiral galaxies that are strong radio sources were selected. Sixteen of the galaxies have integrated radio-to-optical flux ratios greater than 10 times the median value for normal spirals. The remainder contain radio cores ≤20" in size and stronger than 90mJy at 1415MHz or 60mJy at 2695MHz. High-resolution (2" at 1413MHz or 0.6" at 4885MHz) maps of these galaxies were made with the Very Large Array. The radio sources are usually confined to the central 1kpc of the galaxies, lying within and extending parallel to their stellar disks. There is no evidence for ejection from central components. Most of the sources appear to be coextensive with regions of intense star formation (bolometric luminosities ∼1010-1011L_☉). The typical radio luminosity, ∼1021W/Hz/sr at 1413MHz, of the resolved sources can be explained by synchrotron radiation from supernova remnants (SNRs) produced at the rate of ∼1/yr. Five of the radio sources are ≤1pc in size and probably are not related to star formation or SNRs. The radio and 10-µm flux densities of the extended sources are roughly proportional. The bolometric mass-to luminosity ratios in some active regions are too low to have been maintained for a Hubble time. Nearly all of the strong, extended radio sources are found in galaxies with nearby companions, so most of the episodic bursts of star formation are apparently triggered by galaxy-galaxy interactions. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 75 33 Complete radio-selected sample of galaxies table2.dat 97 27 Contour map parameters table3.dat 127 33 Positions table5.dat 53 34 Radio core spectra table6.dat 41 19 Infrared-radio flux ratios of radio-selected galaxies table7.dat 100 85 Galaxy-galaxy interaction
Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 8 A8 --- IAU IAU name (based on B1950 position) 10- 17 A8 --- Name NGC or IC name 20- 24 I5 --- UGC ? UGC (Cat. VII/26) number 26- 49 A24 --- OName Other names 52- 58 A7 --- Type Galaxy type, as in RC2 (Cat. VII/112) 61 A1 --- Asample [A] A: in A sample 63 A1 --- Bsample [B] B: in B sample 65 A1 --- Csample [C] C: in C sample 67 A1 --- Dsample [D] D: in D sample 69 A1 --- Esample [E] E: in E sample 71- 75 F5.1 Mpc Dist Distance
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 8 A8 --- IAU IAU name 10- 17 A8 --- Name NGC, IC or UGC name 20- 23 I4 MHz Freq Frequency 26- 29 F4.2 arcsec Size1 Clean beam size 31 A1 --- --- [x] 33- 36 F4.2 arcsec Size2 Clean beam size 39- 41 I3 deg PA Clean beam position angle 43- 46 I4 K Interval Coutour interval expressed in surface rightness 49- 97 A49 --- Levels Contour levels plotted
Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
1- 8 A8 --- Name NGC, IC or UGC name 10- 13 I4 MHz Freq Frequency of the radio component 15 A1 --- l_Size Limit flag on Size 16- 18 F3.1 arcsec Size ? Size 19 A1 --- u_Size Uncertaitny flag on Size 20 A1 --- --- [x] 21- 23 F3.1 arcsec Size2 ? Size (Size x Size2) 25- 27 I3 deg PA ? Position angle 28- 30 A3 --- Comp Type of component (1) 32- 33 I2 h RAh Right ascension (B1950.0) 35- 36 I2 min RAm Right ascension (B1950.0) 38- 43 F6.3 s RAs Right ascension (B1950.0) 45- 48 F4.3 s e_RAs rms uncertainty on right ascension 50 A1 --- DE- Declination sign (B1950.0) 51- 52 I2 deg DEd Declination (B1950.0) 54- 55 I2 arcmin DEm Declination (B1950.0) 57- 61 F5.2 arcsec DEs Declination (B1950.0) 63- 65 F3.2 arcsec e_DEs rms uncertainty on DEs 67- 71 F5.2 s oRA ? Optical-minus-radio right ascension difference 73- 76 F4.1 arcsec oDE ? Optical-minus-radio declination difference 77 A1 --- n_oRA [*] * = see text for oRA/oDE 78-127 A50 --- Ref References
Note (1): Type of component: C: centroid P: peak CP: central peak CC: compact component NWP: north-west peak
Table 4: Major-axis orientations --------------------------------------------------------- Galaxy D Position angle (deg) deg Optical Radio --------------------------------------------------------- NGC 253 3.8 51 47-58 NGC 520 2.5 95 91 NGC 660 2.2 37 45 NGC 2992 2.4 15 175-26 NGC 3034 2.2 65 72 NGC 3079 5.4 165 159 NGC 3628 3.6 104 103 NGC 4536 2.5 130 130 NGC 6240 2.4 20: 20 Byte-by-byte Description of file: table5.dat
Bytes Format Units Label Explanations
1- 8 A8 --- Name NGC or IC name 11- 12 I2 arcsec Size ? Region size 15- 18 I4 mJy S1413MHz ? Flux density at 1413MHz 20- 23 I4 mJy e_S1413MHz ? rms uncertainty on S1413MHz 26- 29 I4 mJy S4885MHz ? Flux density at 4885MHz 31- 32 I2 mJy e_S4885MHz ? rms uncertainty on S4885MHz 35- 39 A5 --- OFlux References to other fluxes (1) 41- 45 F5.2 --- Sp-Index ? Spectral index (-d(lnS)/d(lnν)) 46 A1 --- u_Sp-Index Uncertainty flag on Sp-Index 47- 52 F6.2 10+21W/Hz/sr L1413 ? Radio spectral luminosity at 1413MHz 53 A1 --- u_L1413 Uncertainty flag on L1413
Note (1): References to other fluxes densities used to determine the spectral indices: a: Dressel and Condon, 1978ApJS...36...53D b: Condon and Dressel, 1978ApJ...221..456C c: Condon, 1980ApJ...242..894C d: Van der Kruit, 1973A&A....29..249V e: Becklin et al., 1980ApJ...236..441B f: Hummel, 1980A&AS...41..151H g: De Bruyn & Willis, 1974A&A....33..351D h: Seaquist, Davis & Bignell, 1978A&A....63..199S i: De Bruyn and Wilson, 1976A&A....53...93D j: Stocke, Tifft & Kaftan-Kassim, 1978AJ.....83..322S
Byte-by-byte Description of file: table6.dat
Bytes Format Units Label Explanations
1- 8 A8 --- Name NGC or IC name 11- 12 I2 arcsec Aper ? Aperture 14 A1 --- l_S10um Limit flag on S10um 15- 19 I5 mJy S10um Flux density at 10um 21 A1 --- r_S10um Reference for S10um (1) 24- 27 I4 mJy S1413MHz ? Flux density at 1413MHz 28 A1 --- u_S1413MHz Uncertainty flag on S1413MHz 30 A1 --- l_IR/Rad Limit flag on IR/Rad 31- 34 F4.1 --- IR/Rad ? Infrared-to-radio flux ratio 35 A1 --- u_IR/Rad Uncertainty flag on IR/Rad
Note (1): References for S10um: a: Rieke and Low, 1972ApJ...176L..95R b: Rieke and Low, 1975ApJ...197...17R c: Becklin et al., 1980ApJ...236..441B d: Rieke and Lebofsky, 1978ApJ...220L..37R e: Rieke, 1978, in Infrared Astronomy, ed. G. Setti & G. Fazio (Dordrecht: Reidel), p. 159. f: Puschell et al., 1983ApJ...265..625P
Byte-by-byte Description of file: table7.dat
Bytes Format Units Label Explanations
1- 8 A8 --- Name Galaxy name 10 A1 --- ERS [V] V for extended radio source 12- 25 A14 --- Comp Companion(s) 27-100 A74 --- Note Evidence for interaction
History: Prepared via OCR. Acknowledgements: From Heinz A. Andernach (R143 in his list) References: Condon, Paper I 1980ApJ...242..894C Condon, Paper III 1983ApJS...53..459C
(End) Patricia Bauer [CDS] 20-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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