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J/A+A/538/A54   Spectroscopy of 12 [WC] planetary nebulae  (Garcia-Rojas+, 2012)

Analysis of chemical abundances in planetary nebulae with [WC] central stars. I. Line intensities and physical conditions. Garcia-Rojas J., Pena M., Morisset C., Mesa-Delgado A., Ruiz M.T. <Astron. Astrophys., 538, A54 (2012)> =2012A&A...538A..54G
ADC_Keywords: Planetary nebulae ; Spectroscopy Keywords: stars: AGB and post-AGB - ISM: abundances - planetary nebulae: general - line: identification Abstract: Planetary nebulae (PNe) around Wolf-Rayet [WR] central stars ([WR]PNe) constitute a particular photoionized nebula class that represents about 10% of the PNe with classified central stars. We analyse deep high-resolution spectrophotometric data of 12 [WR] PNe. This sample of [WR]PNe represents the most extensive analysed so far, at such high spectral resolution. We aim to select the optimal physical conditions in the nebulae to be used in ionic abundance calculations that will be presented in a forthcoming paper. Description: We acquired spectra at Las Campanas Observatory with the 6.5-m telescope and the Magellan Inamori Kyocera (MIKE) spectrograph, covering a wavelength range from 3350Å to 9400Å on September 2009 and June 2010. The spectra were exposed deep enough to detect, with signal-to-noise ratio higher than three, the weak optical recombination lines (ORLs) of OII, CII, and other species. We detect and identify about 2980 emission lines, which, to date, is the most complete set of spectrophotometric data published for this type of objects. From our deep data, numerous diagnostic line ratios for Te and ne are determined from collisionally excited lines (CELs), ORLs, and continuum measurements (HI Paschen continuum in particular). File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 95 12 Object characteristics and log of observations (slit dimensions were always 1"x5") hbeta.dat 50 12 Hβ fluxes and extinction coefficients table3.dat 73 3276 Observed and reddening corrected line ratios (F(Hβ)=100) and line identifications
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- 10 A10 --- PNG PNG name (LLL.l+BB.b) 12- 19 A8 --- Name Name 21- 22 I2 h RAh Right ascension (J2000) 24- 25 I2 min RAm Right ascension (J2000) 27- 30 F4.1 s RAs Right ascension (J2000) 32 A1 --- DE- Declination sign (J2000) 33- 34 I2 deg DEd Declination (J2000) 36- 37 I2 arcmin DEm Declination (J2000) 39- 40 I2 arcsec DEs Declination (J2000) 42- 49 A8 --- SpType Spectral type 51 A1 --- l_T* Limit flag on T* 52- 54 I3 kK T* ? Star temperature (in 103K) 56- 65 A10 "DD-MM-YYYY" Obs.date Observation date 67- 87 A21 --- ExpTime Exposure time(s) (s, times x s) 89- 93 F5.3 --- AirMass Average air mass 95 I1 --- r_T* ? Reference for T* (1)
Note (1): References as follows: 1 = Tylenda & Stasinska (1994A&A...288..897T) 2 = Leuenhagen et al. (1996A&A...312..167L) 3 = Zhang & Kwok (1993ApJS...88..137Z) 4 = Koesterke & Hamann (1997IAUS..180..114K)
Byte-by-byte Description of file: hbeta.dat
Bytes Format Units Label Explanations
1- 10 A10 --- PNG PNG name (LLL.l+BB.b) 12- 19 A8 --- Name Name 22- 30 E9.4 cW/m2/nm F(Hb) Hβ flux, in erg/cm2/s/Å 32- 40 E9.4 mW/m2 I(Hb) Integrated dereddened Hβ flux, (in erg/cm2/s) 42- 45 F4.2 --- c(Hb) Reddening coefficient at Hβ 47- 50 F4.2 --- e_c(Hb) Mean error on c(Hb)
Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
1- 8 A8 --- Name Planetary nebula name 10- 16 F7.2 0.1nm lambda0 ? Adopted laboratory wavelength 18- 24 A7 --- Ion Ion designation 26- 33 A8 --- Mult Multiplet 35- 41 F7.2 0.1nm lambda ?=- Observed wavelength 43- 49 F7.2 km/s HRV ?=- Heliocentric radial velocity determined for the line 51- 58 F8.3 --- F(lam) ?=- Observed flux relative to Hbeta (1) 60- 67 F8.3 ---- I(lam) ?=- Dereddened flux relative to HHbeta (2) 69- 70 I2 % e_I(lam) ?=- Observational 1sigma error associated with the line flux (3) 71 A1 --- u_I(lam) [:] Uncertainty flag on flux measurement 73 A1 --- Note [cdefg] Note (4)
Note (1): in percentage of Hβ flux (i.e. Hβ=100); the absolute fluxes can be derived from the "hbeta.dat" flie. Note (2): in percentage of Hβ flux (i.e. Hβ=100); the Hβ dereddened flux and reddening coefficient are given in the "hbeta.dat" flie. Note (3): The uncertainties in the flux measurement, the flux calibration, and the error propagation in the reddening coefficient are included in the observational error. Note (4): Notes as follows: c = Affected by telluric emission d = Blended with an unknown line e = Affected by charge transfer f = Affected by atmospheric absorption bands g = Partially blended with a strong emission line
History: From electronic version of the journal
(End) Patricia Vannier [CDS] 03-Apr-2012
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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