J/A+A/552/A12 Abundances of PNe in NGC 300 (Stasisnka+, 2013)
Planetary nebulae and HII regions in the spiral galaxy NGC 300.
Clues on the evolution of abundance gradients and on AGB nucleosynthesis.
Stasisnka G., Pena M., Bresolin F., Tsamis Y.G.
<Astron. Astrophys. 552, A12 (2013)>
=2013A&A...552A..12S 2013A&A...552A..12S
ADC_Keywords: Galaxies, nearby ; Planetary nebulae ; H II regions ;
Spectroscopy ; Abundances
Keywords: planetary nebulae: general - H II regions - stars: AGB and post-AGB -
galaxies: abundances
Abstract:
We have obtained deep spectroscopy of 26 planetary nebulae (PNe) and 9
compact HII regions in the nearby spiral galaxy NGC 300, and analyzed
them together with the giant HII regions observed by Bresolin et al.
(2009ApJ...700..309B 2009ApJ...700..309B).
We have determined the physical properties of all those objects and
their content in He, N, O, Ne, S and Ar in a consistent way.
We find that compact HII regions have abundances similar to those of
giant HII regions, while PNe have systematically larger N/O ratios and
similar Ne/O and Ar/O ratios. We demonstrate that this nitrogen
enhancement in PNe cannot be due to second dredge-up in the progenitor
stars, since their initial masses are around 2-2.5M☉. An extra
mixing process is required, perhaps be driven by rotation.
Concerning the radial abundance distribution, PNe behave differently
from HII regions: In the central parts, they show an average O/H
smaller by 0.15dex. Their abundance dispersion at any galactocentric
radius is significantly larger than for HII regions and many of them
have O/H values higher than HII regions at the same galactocentric
distance, suggesting that oxygen production in the PN progenitors in
NGC 300 is common. PN abundance gradients in O/H, Ne/H and Ar/He are
significantly shallower than those of HII regions. We argue that this
indicates a steepening of the metallicity gradient in NGC 300 during
the last Gr, rather than the effect of radial stellar motions.
Description:
Spectroscopic data for 26 recently discovered PNe and 9 compact HII
regions in NGC 300 is presented. For each object equatorial
coordinates, galactocentric distances, fluxes for all the available
emission lines (relative to Hβ=1), logarithmic reddening correction
at Hβ and the total Hβ flux are given. Spectra were obtained
in 2006 August 19-22, with the VLT and FORS2 in MOS mode. The spectral
coverage was from 3600 to 9500Å.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 692 35 Coordinates, galactocentric distances, reddening
corrected observed line fluxes (on scale of
Hβ=1), logarithmic reddening correction for
Hβ and total Hβ flux
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See also:
J/A+A/306/9 : PNe and HII in NGC 300 (Soffner+, 1996)
J/MNRAS/405/1349 : LMC PNe [OIII] 5007Å and Hβ flux (Reid+, 2010)
J/A+A/547/A78 : Catalog of NGC 300 planetary nebula candidates (Pena+, 2012)
Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- Seq [2/109] Identification Number (1)
4 A1 --- m_Seq [ab] Multiplicity index on Seq
6- 7 I2 h RAh Right ascension (J2000)
9- 10 I2 min RAm Right ascension (J2000)
12- 16 F5.2 s RAs Right ascension (J2000)
18 A1 --- DE- Declination sign (J2000)
19- 20 I2 deg DEd Declination (J2000)
22- 23 I2 arcmin DEm Declination (J2000)
25- 28 F4.1 arcsec DEs Declination (J2000)
30- 32 A3 --- Type Object type: "CHR" for compact HII region,
or "PN" for planetary nebula
34- 37 F4.2 --- R Galactocentric distance in units of R25
39 A1 --- l_F3727 [l] l indicates upper limit of F3727
41- 45 F5.3 --- F3727 ? Flux of [OII] 3727Å line
46 A1 --- n_F3727 [n] n for noisy
48- 52 F5.3 --- e_F3727 ? Error for F3727
57- 61 F5.3 --- F3750 ? Flux of H12 3750Å line
64- 68 F5.3 --- e_F3750 ? Error for F3750
73- 77 F5.3 --- F3770 ? Flux of H11 3770Å line
80- 84 F5.3 --- e_F3770 ? Error for F3770
89- 93 F5.3 --- F3797 ? Flux of H10 3997Å line
96-100 F5.3 --- e_F3797 ? Error for F3797
103 A1 --- l_F3835 [l] l indicates upper limit of F3835
105-109 F5.3 --- F3835 ? Flux of H9 3935Å line
112-116 F5.3 --- e_F3835 ? Error for F3835
121-125 F5.3 --- F3869 ? Flux of [NeIII] 3869Å line
128-132 F5.3 --- e_F3869 ? Error for F3869
135 A1 --- l_F3889 [l] l indicates upper limit of F3889
137-141 F5.3 --- F3889 ? Flux of H8 line
144-148 F5.3 --- e_F3889 ? Error for F3889
151 A1 --- l_F3970 [l] l indicates upper limit of F3970
153-157 F5.3 --- F3970 ? Flux of H7 3970Å line
160-164 F5.3 --- e_F3970 ? Error for F3970
167 A1 --- l_F4026 [l] l indicates upper limit of F4026
169-173 F5.3 --- F4026 ? Flux of HeI 4026Å line
176-180 F5.3 --- e_F4026 ? Error for F4026
183 A1 --- l_F4069 [l] l indicates upper limit of F4069
185-189 F5.3 --- F4069 ? Flux of [SII] 4069Å line
192-196 F5.3 --- e_F4069 ? Error for F4069
201-205 F5.3 --- F4102 ? Flux of Hdelta 4102Å line
208-212 F5.3 --- e_F4102 ? Error for F4102
215 A1 --- l_F4267 [l] l indicates upper limit of F4267
217-221 F5.3 --- F4267 ? Flux of CII 4267Å line
224-228 F5.3 --- e_F4267 ? Error for F4267
233-237 F5.3 --- F4340 ? Flux of Hgamma 4340Å line
240-244 F5.3 --- e_F4340 ? Error for F4340
247 A1 --- l_F4363 [l] l indicates upper limit of F4363
249-253 F5.3 --- F4363 ? Flux of [OIII] 4363Å line
256-260 F5.3 --- e_F4363 ? Error for F4363
263 A1 --- l_F4471 [l] l indicates upper limit of F4471
265-269 F5.3 --- F4471 ? Flux of HeI 4471Å line
272-276 F5.3 --- e_F4471 ? Error for F4471
279 A1 --- l_F4686 [l] l indicates upper limit of F4686
281-285 F5.3 --- F4686 ? Flux of HeII 4686Å line
288-292 F5.3 --- e_F4686 ? Error for F4686
295 A1 --- l_F4711 [l] l indicates upper limit of F4711
297-301 F5.3 --- F4711 ? Flux of [ArIV] 4711Å line
304-308 F5.3 --- e_F4711 ? Error for F4711
311 A1 --- l_F4740 [l] l indicates upper limit of F4740
313-317 F5.3 --- F4740 ? Flux of [ArIV] 4740Å line
320-324 F5.3 --- e_F4740 ? Error for F4740
329-333 F5.3 --- F4861 [1] Flux of Hβ 4861Å line
336-340 F5.3 --- e_F4861 Error for F4861
345-349 F5.3 --- F4922 ? Flux of HeI 4922Å line
352-356 F5.3 --- e_F4922 ? Error for F4922
361-365 F5.3 --- F4859 ? Flux of [OIII] 4959Å line
368-372 F5.3 --- e_F4859 ? Error for F4959
376-381 F6.3 --- F5007 ? Flux of [OIII] 5007Å line
384-388 F5.3 --- e_F5007 ? Error for F5007
393-397 F5.3 --- F5015 ? Flux of HeI 5015Å line
400-404 F5.3 --- e_F5015 ? Error for F5015
409-413 F5.3 --- F5200 ? Flux of [NI] 5200Å line
416-420 F5.3 --- e_F5200 ? Error for F5200
425-429 F5.3 --- F5755 ? Flux of [NII] 5755Å line
432-436 F5.3 --- e_F5755 ? Error for F5755
439 A1 --- l_F5876 [l] l indicates upper limit of F5876
441-445 F5.3 --- F5876 ? Flux of HeI 5876Å line
448-452 F5.3 --- e_F5876 ? Error for F5876
455 A1 --- l_F6300 [l] l indicates upper limit of F6300
457-461 F5.3 --- F6300 ? Flux of [OI] 6300Å line
464-468 F5.3 --- e_F6300 ? Error for F6300
471 A1 --- l_F6312 [l] l indicates upper limit of F6312
473-477 F5.3 --- F6312 ? Flux of [SIII] 6312Å line
480-484 F5.3 --- e_F6312 ? Error for F6312
487 A1 --- l_F6548 [l] l indicates upper limit of F6548
489-493 F5.3 --- F6548 ? Flux of [NII] 6548Å line
496-500 F5.3 --- e_F6548 ? Error for F6548
505-509 F5.3 --- F6563 ? Flux of Hα 6563Å line
512-516 F5.3 --- e_F6563 ? Error for F6563
519 A1 --- l_F6583 [l] l indicates upper limit of F6583
521-525 F5.3 --- F6583 ? Flux of [NII] 6583Å line
528-532 F5.3 --- e_F6583 ? Error for F6583
535 A1 --- l_F6678 [l] l indicates upper limit of F6678
537-541 F5.3 --- F6678 ? Flux of HeI 6678Å line
544-548 F5.3 --- e_F6678 ? Error for F6678
551 A1 --- l_F6716 [l] l indicates upper limit of F6716
553-557 F5.3 --- F6716 ? Flux of [SII] 6716Å line
560-564 F5.3 --- e_F6716 ? Error for F6716
567 A1 --- l_F6731 [l] l indicates upper limit of F6731
569-573 F5.3 --- F6731 ? Flux of [SII] 6731Å line
576-580 F5.3 --- e_F6731 ? Error for F6731
583 A1 --- l_F7066 [l] l indicates upper limit of F7066
585-589 F5.3 --- F7066 ? Flux of HeI 7065Å line
592-596 F5.3 --- e_F7066 ? Error for F7066
599 A1 --- l_F7136 [l] l indicates upper limit of F7136
601-605 F5.3 --- F7136 ? Flux of [ArIII] 7136Å line
608-612 F5.3 --- e_F7136 ? Error for F7136
615 A1 --- n_F7320 [+l] l indicates upper limit of F7320,
+ addition of fluxes of 7320 & 7330
617-621 F5.3 --- F7320 ? Flux of [OII] 7320Å line
624-628 F5.3 --- e_F7320 ? Error for F7320
631 A1 --- l_F7330 [l] l indicates upper limit of F7330
633-637 F5.3 --- F7330 ? Flux of [OII] 7330Å line
640-644 F5.3 --- e_F7330 ? Error for F7330
647 A1 --- l_F9069 [l] l indicates upper limit of F9069
649-653 F5.3 --- F9069 ? Flux of [SIII] 9069Å line
656-660 F5.3 --- e_F9069 ? Error for F9069
663 A1 --- l_F9531 [l] l indicates upper limit of F9531
665-669 F5.3 --- F9531 ? Flux of [SIII] 9531Å line
672-676 F5.3 --- e_F9531 ? Error for F9531
680-683 F4.2 --- c(Hb) Hβ logarithmic reddening
686-692 F7.3 [mW/m2] logF(Hb) Log of Hβ flux, in erg.cm-2.s-1
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Note (1): Number as given in Table 2 of Pena et al. 2012,
Cat. J/A+A/547/A78 ([DCL88] NNNA).
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Acknowledgements:
Miriam Pena, miriam(at)astro.unam.mx
(End) Patricia Vannier CDS 14-Feb-2013