J/A+A/373/536 New galactic bulge PNe (van de Steene+, 2001)
Radio observations of new galactic bulge planetary nebulae. van de Steene G. C., Jacoby G. <Astron. Astrophys. 373, 536 (2001)> =2001A&A...373..536V
ADC_Keywords: Planetary nebulae ; Radio lines ; Morphology Keywords: planetary nebulae: general - galaxy bulge continuum: stars - galaxy: stellar content radio Abstract: We observed 64 newly identified galactic bulge planetary nebulae in the radio continuum at 3 and 6 cm with the Australia Telescope Compact Array. We present their radio images, positions, flux densities, and angular sizes. The survey appears to have detected a larger ratio of more extended planetary nebulae with low surface brightness than in previous surveys. We calculated their distances according to Van de Steene & Zijlstra (1995A&A...293..541V). We find that most of the new sample is located on the near side around the galactic center and closer in than the previously known bulge PNe. Based on Hα images and spectroscopic data, we calculated the total Hα flux. We compare this flux value with the radio flux density and derive the extinction. We confirm that the distribution of the extinction values around the galactic center rises toward the center, as expected. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 84 64 Optical and radio positions of the new galactic bulge PNe. table2.dat 96 57 Radio flux densities at 6 and 3 cm, and angular sizes tables.tex 131 167 LaTeX version of the tables
See also: V/84 : Strasbourg-ESO Catalogue of Galactic Planetary Nebulae (Acker+, 1992) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 2 I2 --- JaSt PN name 4- 5 I2 h RAh Optical right ascension (J2000.0) 7- 8 I2 min RAm Optical right ascension (J2000.0) 10- 14 F5.2 s RAs Optical right ascension (J2000.0) 17 A1 --- DE- Optical declination sign (J2000.0) 18- 19 I2 deg DEd Optical declination (J2000.0) 21- 22 I2 arcmin DEm Optical declination (J2000.0) 24- 28 F5.2 arcsec DEs Optical declination (J2000.0) 32- 33 I2 h RArh ? Radio right ascension (J2000.0) (1) 35- 36 I2 min RArm ? Radio right ascension (J2000.0) 38- 42 F5.2 s RArs ? Radio right ascension (J2000.0) 43 A1 --- u_RArs Uncertainty flag on RArs 45 A1 --- DEr- Radio declination sign (J2000.0) 46- 47 I2 deg DErd ? Radio declination (J2000.0) 49- 50 I2 arcmin DErm ? Radio declination (J2000.0) 52- 56 F5.2 arcsec DErs ? Radio declination (J2000.0) 57 A1 --- u_DErs Uncertainty flag on DErs 59- 63 F5.2 arcsec oRA ? Offset in right ascension 65- 69 F5.2 arcsec oDE ? Offset in declination 71 I1 --- Run [1/2] Run number (2) 73- 84 A12 --- ND Note (not detected)
Note (1): The radio position is the position of the peak flux density per beam of the PN at 6cm. Note (2): Objects for which run=1 were observed in 1997, objects for which run=2 were observed in 1999.
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 2 I2 --- JaSt PN name 4- 8 F5.2 mJy Peak6cm ? Peak flux density at 6cm (5GHz) in mJy/beam 10 A1 --- l_Flux6cm Limit flag on Flux6cm 11- 14 F4.1 mJy Flux6cm ? Total radio flux density at 6cm (5GHz) 15 A1 --- u_Flux6cm Uncertainty flag on Flux6cm 16- 19 F4.1 mJy e_Flux6cm ? rms uncertainty on Flux6cm 21- 24 F4.2 mJy Noise6cm ? Noise in the 6cm map in mJy/beam 26- 30 F5.2 mJy Peak3cm ? Peak flux density at 3cm (10GHz) in mJy/beam 32 A1 --- l_Flux3cm Limit flag on Flux3cm 33- 36 F4.1 mJy Flux3cm ? Total radio flux density at 3cm (10GHz) 37 A1 --- u_Flux3cm Uncertainty flag on Flux3cm 39- 41 F3.1 mJy e_Flux3cm ? rms uncertainty on Flux3cm 43- 46 F4.2 mJy Noise3cm ? Noise in the 3cm map (in mJy/beam) 48- 52 F5.2 arcsec DDE ? Deconvolved FWHM (Δδ) 53 A1 --- u_DDE Uncertainty flag on DDE 54 A1 --- --- [x] 55- 59 F5.2 arcsec DRA ? Deconvolved FWHM (Δα) 60 A1 --- u_DRA Uncertainty flag on DRA 61- 62 A2 --- PS [PS ] Point source 64- 66 F3.1 arcsec MajAxis FWHM of the beam major axis (maj) 68 A1 --- --- [x] 70- 73 F4.2 arcsec MinAxis FWHM of the beam minor axis (min) 75 A1 --- l_Diam Limit flag on Diam 76- 80 F5.2 arcsec Diam ? Equivalent FWHM diameter 81 A1 --- u_Diam Uncertainty flag on Diam 83 A1 --- Method [CG] Method (1) 85- 87 A3 --- n_Diam [3cm ] Note (2) 91 A1 --- l_Theta Limit flag on Theta 92- 95 F4.1 arcsec Theta ? Estimation of the full equivalent diameter 96 A1 --- u_Theta Uncertainty flag on Theta
Note (1): The diameter FWHM is the deconvolved FWHM determined after fitting a Gaussian model (G) or after measuring the size from the contour plot (C). Note (2): If 3cm, diameter determined at 3cm, otherwise at 6cm.
Acknowledgements: Griet Van de Steene
(End) Patricia Bauer [CDS] 11-May-2001
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