J/A+A/567/A12 Chemical abundances in Galactic PNe (Garcia-Hernandez+, 2014)
Chemical abundances in Galactic planetary nebulae with Spitzer spectra.
Garcia-Hernandez D.A, Gorny S.K.
<Astron. Astrophys. 567, A12 (2014)>
=2014A&A...567A..12G 2014A&A...567A..12G
ADC_Keywords: Planetary nebulae ; Abundances ; Spectroscopy
Keywords: planetary nebulae: general - stars: abundances -
stars: evolution - Galaxy: bulge - infrared: stars - stars: Wolf-Rayet
Abstract:
We present new low-resolution (R∼800) optical spectra of 22 Galactic
PNe with Spitzer spectra. These data are combined with recent optical
spectroscopic data available in the literature to construct
representative samples of compact (and presumably young) Galactic disc
and bulge PNe with Spitzer spectra. Attending to the nature of the
dust features seen in their Spitzer spectra, Galactic disc and bulge
PNe are classified according to four major dust types (oxygen
chemistry or OC, carbon chemistry or CC, double chemistry or DC,
featureless or F) and subtypes (amorphous and crystalline, and
aliphatic and aromatic). Nebular gas abundances of He, N, O, Ne, S,
Cl, and Ar, as well as plasma parameters (e.g. Ne, Te) are
homogeneously derived and we study the median chemical abundances and
nebular properties in Galactic disc and bulge PNe depending on their
Spitzer dust types and subtypes. A comparison of the derived median
abundance patterns with AGB nucleosynthesis predictions show mainly
that i) DC PNe, both with amorphous and crystalline silicates, display
high-metallicity (solar/supra-solar) and the highest He abundances and
N/O ratios, suggesting relatively massive (∼3-5M☉) hot bottom
burning AGB stars as progenitors; ii) PNe with O-rich and C-rich
unevolved dust (amorphous and aliphatic) seem to evolve from subsolar
metallicity (z∼0.008) and lower mass (<3M☉) AGB stars; iii) a
few O-rich PNe and a significant fraction of C-rich PNe with more
evolved dust (crystalline and aromatic, respectively) display chemical
abundances similar to DC PNe, suggesting that they are related
objects. A comparison of the derived nebular properties with
predictions from models combining the theoretical central star
evolution with a simple nebular model is also presented. Finally, a
possible link between the Spitzer dust properties, chemical
abundances, and evolutionary status is discussed.
Description:
We present new spectroscopic data (19 objects) and derived plasma
plasma diagnostics and abundances (131 objects) for a sample of
planetary nebulae with available Spitzer spectra located in the
Galactic bulge and disk.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table2.dat 633 19 Observed line fluxes and dereddened intensities
(on the scale Hβ=100)
table2.txt 472 36 *Table 2 in original format
table3.dat 373 131 Plasma diagnostics and abundances of Galactic
planetary nebulae with Spitzer spectra
table3.txt 166 523 *Table 3 in original format
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Note on table2.txt: In this table, there are two columns for each object.
The left column gives the measured fluxes and the right column the
dereddened line intensities.
Note on table3.txt: In this table, there are three rows for each object, and
a fourth row used to separate the objects. The first row gives the values
of parameters computed from the nominal values of the observational data.
The second and third row give the upper and lower limits respectively of
these parameters.
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See also:
V/84 : Strasbourg-ESO Catalogue of Galactic Planetary Nebulae (Acker+, 1992)
Byte-by-byte Description of file: table2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 11 A11 --- PNG Planetary Nebula PNG Name (see Cat. V/84)
13- 23 A11 --- Name Usual name
25- 31 F7.2 --- F3727 ? Observed flux of [OII] 372.7nm line
32 A1 --- u_F3727 [:;] Quality flag on [OII] 372.7nm line (1)
33 A1 --- n_F3727 Note on [OII] 372.7nm line (2)
35- 41 F7.2 --- F3869 ? Observed flux of [NeIII] 386.9nm line
42 A1 --- u_F3869 [:;] Quality flag on [NeIII] 386.9nm line (1)
43 A1 --- n_F3869 Note on [NeIII] 386.9nm line (2)
45- 51 F7.2 --- F4068 ? Observed flux of [SII] 406.8nm line
52 A1 --- u_F4068 [:;] Quality flag on [SII] 406.8nm line (1)
53 A1 --- n_F4068 Note on [SII] 406.8nm line (2)
55- 61 F7.2 --- F4102 ? Observed flux of Hδ 410.2nm line
62 A1 --- u_F4102 [:;] Quality flag on Hδ 410.2nm line (1)
63 A1 --- n_F4102 Note on Hδ 410.2nm line (2)
65- 71 F7.2 --- F4340 ? Observed flux of Hγ 434.0nm line
72 A1 --- u_F4340 [:;] Quality flag on Hγ 434.0nm line (1)
73 A1 --- n_F4340 Note on Hγ 434.0nm line (2)
75- 81 F7.2 --- F4363 ? Observed flux of [OIII] 436.3nm line
82 A1 --- u_F4363 [:;] Quality flag on [OIII] 436.3nm line (1)
83 A1 --- n_F4363 Note on [OIII] 436.3nm line (2)
85- 91 F7.2 --- F4471 ? Observed flux of HeI 447.1nm line
92 A1 --- u_F4471 [:;] Quality flag on HeI 447.1nm line (1)
93 A1 --- n_F4471 Note on HeI 447.1nm line (2)
95-101 F7.2 --- F4686 ? Observed flux of HeII 468.6nm line
102 A1 --- u_F4686 [:;] Quality flag on HeII 468.6nm line (1)
103 A1 --- n_F4686 Note on HeII 468.6nm line (2)
105-111 F7.2 --- F4711 ? Observed flux of [ArIV] 471.1nm line
112 A1 --- u_F4711 [:;] Quality flag on [ArIV] 471.1nm line (1)
113 A1 --- n_F4711 Note on [ArIV] 471.1nm line (2)
115-121 F7.2 --- F4725 ? Observed flux of [NeIV] 472.5nm line
122 A1 --- u_F4725 [:;] Quality flag on [NeIV] 472.5nm line (1)
123 A1 --- n_F4725 Note on [NeIV] 472.5nm line (2)
125-131 F7.2 --- F4740 ? Observed flux of [ArIV] 474.0nm line
132 A1 --- u_F4740 [:;] Quality flag on [ArIV] 474.0nm line (1)
133 A1 --- n_F4740 Note on [ArIV] 474.0nm line (2)
135-141 F7.2 --- F4861 [100] Observed flux of Hβ 486.1nm line
142 A1 --- u_F4861 [:;] Quality flag on Hβ 486.1nm (2)
143 A1 --- n_F4861 Note on Hβ 486.1nm line (2)
145-151 F7.2 --- F4959 Observed flux of [OIII] 495.9nm line
152 A1 --- u_F4959 [:;] Quality flag on [OIII] 495.9nm line (1)
153 A1 --- n_F4959 Note on [OIII] 495.9nm line (2)
155-161 F7.2 --- F5007 ? Observed flux of [OIII] 500.7nm line
162 A1 --- u_F5007 [:;] Quality flag on [OIII] 500.7nm line (1)
163 A1 --- n_F5007 Note on [OIII] 500.7nm line (2)
165-171 F7.2 --- F5200 ? Observed flux of [NI] 520.0nm line
172 A1 --- u_F5200 [:;] Quality flag on [NI] 520.0nm line (1)
173 A1 --- n_F5200 Note on [NI] 520.0nm line (2)
175-181 F7.2 --- F5515 ? Observed flux of [ClIII] 551.5nm line
182 A1 --- u_F5515 [:;] Quality flag on [ClIII] 551.5nm line (1)
183 A1 --- n_F5515 Note on [ClIII] 551.5nm line (2)
185-191 F7.2 --- F5537 ? Observed flux of [ClIII] 553.7nm line
192 A1 --- u_F5537 [:;] Quality flag on [ClIII] 553.7nm line (1)
193 A1 --- n_F5537 Note on [ClIII] 553.7nm line (2)
195-201 F7.2 --- F5755 ? Observed flux of [NII] 575.5nm line
202 A1 --- u_F5755 [:;] Quality flag on [NII] 575.5nm line (1)
203 A1 --- n_F5755 Note on [NII] 575.5nm line (2)
205-211 F7.2 --- F5876 Observed flux of HeI 587.6nm line
212 A1 --- u_F5876 [:;] Quality flag on HeI 587.6nm line (1)
213 A1 --- n_F5876 Note on HeI 587.6nm line (2)
215-221 F7.2 --- F6300 ? Observed flux of [OI] 630.0nm line
222 A1 --- u_F6300 [:;] Quality flag on [OI] 630.0nm line (1)
223 A1 --- n_F6300 Note on [OI] 630.0nm line (2)
225-231 F7.2 --- F6312 ? Observed flux of [SIII] 631.2nm line
232 A1 --- u_F6312 [:;] Quality flag on [SIII] 631.2nm line (1)
233 A1 --- n_F6312 Note on [SIII] 631.2nm line (2)
235-241 F7.2 --- F6548 ? Observed flux of [NII] 654.8nm line
242 A1 --- u_F6548 [:;] Quality flag on [NII] 654.8nm line (1)
243 A1 --- n_F6548 Note on [NII] 654.8nm line (2)
245-251 F7.2 --- F6563 Observed flux of Hα 656.3nm line
252 A1 --- u_F6563 [:;] Quality flag on Hα 656.3nm line (1)
253 A1 --- n_F6563 Note on Hα 656.3nm line (2)
255-261 F7.2 --- F6583 ? Observed flux of [NII] 654.3nm line
262 A1 --- u_F6583 [:;] Quality flag on [NII] 658.3nm line (1)
263 A1 --- n_F6583 Note on [NII] 658.3nm line (2)
265-271 F7.2 --- F6678 Observed flux of HeI 667.8nm line
272 A1 --- u_F6678 [:;] Quality flag oneI 667.8nm line (1)
273 A1 --- n_F6678 Note oneI 667.8nm line (2)
275-281 F7.2 --- F6716 ? Observed flux of [SII] 671.6nm line
282 A1 --- u_F6716 [:;] Quality flag on [SII] 671.6nm line (1)
283 A1 --- n_F6716 Note on [SII] 671.6nm line (2)
285-291 F7.2 --- F6730 ? Observed flux of [SII] 673.0nm line
292 A1 --- u_F6730 [:;] Quality flag on [SII] 673.0nm line (1)
293 A1 --- n_F6730 Note on [SII] 673.0nm line (2)
295-301 F7.2 --- F7006 ? Observed flux of [ArV] 700.6nm line
302 A1 --- u_F7006 [:;] Quality flag on [ArV] 700.6nm line (1)
303 A1 --- n_F7006 Note on [ArV] 700.6nm line (2)
305-311 F7.2 --- F7135 Observed flux of [ArIII] 713.5nm line
312 A1 --- u_F7135 [:;] Quality flag onArIII] 713.5nm line (1)
313 A1 --- n_F7135 Note on [ArIII] 713.5nm line (2)
315-321 F7.2 --- F7320 ? Observed flux of [OII] 732.0nm line
322 A1 --- u_F7320 [:;] Quality flag on [OII] 732.0nm line (2)
323 A1 --- n_F7320 Note on [OII] 732.0nm line (2)
325-331 F7.2 --- F7330 ? Observed flux of [OII] 733.0nm line
332 A1 --- u_F7330 [:;] Quality flag on [OII] 733.0nm line (2)
333 A1 --- n_F7330 Note on [OII] 733.0nm line (2)
335-341 F7.2 --- I3727 ? Dereddened intensity of [OII] 372.7nm line
342 A1 --- u_I3727 [:;] Quality flag on [OII] 372.7nm line (1)
343 A1 --- n_I3727 Note on [OII] 372.7nm line (2)
345-351 F7.2 --- I3869 ? Dereddened intensity of [NeIII] 386.9nm line
352 A1 --- u_I3869 [:;] Quality flag on [NeIII] 386.9nm line (1)
353 A1 --- n_I3869 Note on [NeIII] 386.9nm line (2)
355-361 F7.2 --- I4068 ? Dereddened intensity of [SII] 406.8nm line
362 A1 --- u_I4068 [:;] Quality flag on [SII] 406.8nm line (1)
363 A1 --- n_I4068 Note on [SII] 406.8nm line (2)
365-371 F7.2 --- I4102 ? Dereddened intensity of Hδ 410.2nm line
372 A1 --- u_I4102 [:;] Quality flag on Hδ 410.2nm line (1)
373 A1 --- n_I4102 Note on Hδ 410.2nm line (2)
375-381 F7.2 --- I4340 ? Dereddened intensity of Hγ 434.0nm line
382 A1 --- u_I4340 [:;] Quality flag on Hγ 434.0nm line (1)
383 A1 --- n_I4340 Note on Hγ 434.0nm line (2)
385-391 F7.2 --- I4363 ? Dereddened intensity of [OIII] 436.3nm line
392 A1 --- u_I4363 [:;] Quality flag on [OIII] 436.3nm line (1)
393 A1 --- n_I4363 Note on [OIII] 436.3nm line (2)
395-401 F7.2 --- I4471 ? Dereddened intensity of HeI 447.1nm line
402 A1 --- u_I4471 [:;] Quality flag on HeI 447.1nm line (1)
403 A1 --- n_I4471 Note on HeI 447.1nm line (2)
405-411 F7.2 --- I4686 ? Dereddened intensity of HeII 468.6nm line
412 A1 --- u_I4686 [:;] Quality flag on HeII 468.6nm line (1)
413 A1 --- n_I4686 Note on HeII 468.6nm line (2)
415-421 F7.2 --- I4711 ? Dereddened intensity of [ArIV] 471.1nm line
422 A1 --- u_I4711 [:;] Quality flag on [ArIV] 471.1nm line (1)
423 A1 --- n_I4711 Note on [ArIV] 471.1nm line (2)
425-431 F7.2 --- I4725 ? Dereddened intensity of [NeIV] 472.5nm line
432 A1 --- u_I4725 [:;] Quality flag on [NeIV] 472.5nm line (1)
433 A1 --- n_I4725 Note on [NeIV] 472.5nm line (2)
435-441 F7.2 --- I4740 ? Dereddened intensity of [ArIV] 474.0nm line
442 A1 --- u_I4740 [:;] Quality flag on [ArIV] 474.0nm line (1)
443 A1 --- n_I4740 Note on [ArIV] 474.0nm line (2)
445-451 F7.2 --- I4861 [100] Dereddened intensity of Hβ line
452 A1 --- u_I4861 [:;] Quality flag on Hβ 486.1nm (2)
453 A1 --- n_I4861 Note on Hβ 486.1nm line (2)
455-461 F7.2 --- I4959 Dereddened intensity of [OIII] 495.9nm line
462 A1 --- u_I4959 [:;] Quality flag on [OIII] 495.9nm line (1)
463 A1 --- n_I4959 Note on [OIII] 495.9nm line (2)
465-471 F7.2 --- I5007 Dereddened intensity of [OIII] 500.7nm line
472 A1 --- u_I5007 [:;] Quality flag on [OIII] 500.7nm line (1)
473 A1 --- n_I5007 Note on [OIII] 500.7nm line (2)
475-481 F7.2 --- I5200 ? Dereddened intensity of [NI] 520.0nm line
482 A1 --- u_I5200 [:;] Quality flag on [NI] 520.0nm line (1)
483 A1 --- n_I5200 Note on [NI] 520.0nm line (2)
485-491 F7.2 --- I5515 ? Dereddened intensity of [ClIII] 551.5nm line
492 A1 --- u_I5515 [:;] Quality flag on [ClIII] 551.5nm line (1)
493 A1 --- n_I5515 Note on [ClIII] 551.5nm line (2)
495-501 F7.2 --- I5537 ? Dereddened intensity of [ClIII] 553.7nm line
502 A1 --- u_I5537 [:;] Quality flag on [ClIII] 553.7nm line (1)
503 A1 --- n_I5537 Note on [ClIII] 553.7nm line (2)
505-511 F7.2 --- I5755 ? Dereddened intensity of [NII] 575.5nm line
512 A1 --- u_I5755 [:;] Quality flag on [NII] 575.5nm line (1)
513 A1 --- n_I5755 Note on [NII] 575.5nm line (2)
515-521 F7.2 --- I5876 Dereddened intensity of HeI 587.6nm line
522 A1 --- u_I5876 [:;] Quality flag on HeI 587.6nm line (1)
523 A1 --- n_I5876 Note on HeI 587.6nm line (2)
525-531 F7.2 --- I6300 ? Dereddened intensity of [OI] 630.0nm line
532 A1 --- u_I6300 [:;] Quality flag on [OI] 630.0nm line (1)
533 A1 --- n_I6300 Note on [OI] 630.0nm line (2)
535-541 F7.2 --- I6312 ? Dereddened intensity of [SIII] 631.2nm line
542 A1 --- u_I6312 [:;] Quality flag on [SIII] 631.2nm line (1)
543 A1 --- n_I6312 Note on [SIII] 631.2nm line (2)
545-551 F7.2 --- I6548 ? Dereddened intensity of [NII] 654.8nm line
552 A1 --- u_I6548 [:;] Quality flag on [NII] 654.8nm line (1)
553 A1 --- n_I6548 Note on [NII] 654.8nm line (2)
555-561 F7.2 --- I6563 Dereddened intensity of Hα 656.3nm line
562 A1 --- u_I6563 [:;] Quality flag on Hα 656.3nm line (1)
563 A1 --- n_I6563 Note on Hα 656.3nm line (2)
565-571 F7.2 --- I6583 ? Dereddened intensity of [NII] 654.3nm line
572 A1 --- u_I6583 [:;] Quality flag on [NII] 658.3nm line (1)
573 A1 --- n_I6583 Note on [NII] 658.3nm line (2)
575-581 F7.2 --- I6678 Dereddened intensity of HeI 667.8nm line
582 A1 --- u_I6678 [:;] Quality flag oneI 667.8nm line (1)
583 A1 --- n_I6678 Note oneI 667.8nm line (2)
585-591 F7.2 --- I6716 ? Dereddened intensity of [SII] 671.6nm line
592 A1 --- u_I6716 [:;] Quality flag on [SII] 671.6nm line (1)
593 A1 --- n_I6716 Note on [SII] 671.6nm line (2)
595-601 F7.2 --- I6730 ? Dereddened intensity of [SII] 673.0nm line
602 A1 --- u_I6730 [:;] Quality flag on [SII] 673.0nm line (1)
603 A1 --- n_I6730 Note on [SII] 673.0nm line (2)
605-611 F7.2 --- I7006 ? Dereddened intensity of [ArV] 700.6nm line
612 A1 --- u_I7006 [:;] Quality flag on [ArV] 700.6nm line (1)
613 A1 --- n_I7006 Note on [ArV] 700.6nm line (2)
615-621 F7.2 --- I7135 Dereddened intensity of [ArIII] 713.5nm line
622 A1 --- u_I7135 [:;] Quality flag onArIII] 713.5nm line (1)
623 A1 --- n_I7135 Note on [ArIII] 713.5nm line (2)
625-631 F7.2 --- I7325 ? Dereddened intensity of [OII] 732.5nm doublet
632 A1 --- u_I7325 [:;] Quality flag on [OII] 732.5nm doublet (2)
633 A1 --- n_I7325 Note on [OII] 732.5nm doublet (2)
--------------------------------------------------------------------------------
Note (1): Quality flags on measured fluxes mean:
: = uncertainty is around 20%
; = uncertainty is around 40%
Note (2): Notes on observed lines are coded as follows:
p = line present but not measurable
? = uncertain identification
s = saturated
r = recalculated using doublet pair
b = significantly blended with other line
B = blend or sum of two lines
c = additional reddening correction applied
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 11 A11 --- PNG Planetary Nebula PNG Name (see Cat. V/84)
13- 23 A11 --- Name Usual name
25 A1 --- Loc [db] Location of PN: d=disk, b=bulge
27- 29 A3 --- Ref1 Reference to previous classification of
Spitzer spectra (2)
31- 36 A6 --- Type Dust classification (3)
38- 61 A24 --- Ref2 References to optical data (4)
64- 71 E8.3 cm-3 Ne[SII] Electron density from [SII] 6731/6717
74- 78 I5 K Te[NII] ? Electron temperature from [NII] 5755/6584
81- 85 I5 K Te[OIII] ? Electron temperature from [OIII] 4363/5007
88- 95 E8.3 --- He/H ? He/H ratio
98-105 E8.3 --- N/H ? N/H ratio
108-115 E8.3 --- O/H O/H ratio
118-125 E8.3 --- Ne/H ? Ne/H ratio
128-135 E8.3 --- S/H ? S/H ratio
138-145 E8.3 --- Ar/H ? Ar/H ratio
148-155 E8.3 --- Cl/H ? Cl/H ratio
158-165 E8.3 --- C ? Logarithmic extinction at Hβ (5)
168-175 E8.3 cm-3 E_Ne[SII] ? Error on Ne[SII] (upper limit)
178-182 I5 K E_Te[NII] ? Error on Te[NII] (upper limit)
185-189 I5 K E_Te[OIII] ? Error on Te[OIII] (upper limit)
192-199 E8.3 --- E_He/H ? Error on He/H (upper limit)
202-209 E8.3 --- E_N/H ? Error on N/H (upper limit)
212-219 E8.3 --- E_O/H Error on O/H (upper limit)
222-229 E8.3 --- E_Ne/H ? Error on Ne/H (upper limit)
232-239 E8.3 --- E_S/H ? Error on S/H (upper limit)
242-249 E8.3 --- E_Ar/H ? Error on Ar/H (upper limit)
252-259 E8.3 --- E_Cl/H ? Error on Cl/H (upper limit)
262-269 E8.3 --- E_C ? Error on C (upper limit)
272-279 E8.3 cm-3 e_Ne[SII] ? Error on Ne[SII] (lower limit)
282-286 I5 K e_Te[NII] ? Error on Te[NII] (lower limit)
289-293 I5 K e_Te[OIII] ? Error on Te[OIII] (lower limit)
296-303 E8.3 --- e_He/H ? Error on He/H (lower limit)
306-313 E8.3 --- e_N/H ? Error on N/H (lower limit)
316-323 E8.3 --- e_O/H Error on O/H (lower limit)
326-333 E8.3 --- e_Ne/H ? Error on Ne/H (lower limit)
336-343 E8.3 --- e_S/H ? Error on S/H (lower limit)
346-353 E8.3 --- e_Ar/H ? Error on Ar/H (lower limit)
356-363 E8.3 --- e_Cl/H ? Error on Cl/H (lower limit)
366-373 E8.3 --- e_C ? Error on C (lower limit)
--------------------------------------------------------------------------------
Note (2): Previous classification of Spitzer spectra:
G = Gutenkunst et al. (2008ApJ...680.1206G 2008ApJ...680.1206G)
P = Perea-Calderon et al. (2009A&A...495L...5P 2009A&A...495L...5P)
S = Stanghellini et al. (2012ApJ...753..172S 2012ApJ...753..172S)
Note (3): Dust classifications are described in Sect. 3 and Table 4. It
consists in a main Chemistry (CC, OC, DC or F) followed by (lowercase)
subtypes. Types and subtypes are:
CC = C-rich (Carbon Chemistry)
OC = O-rich (Oxygen Chemistry)
DC = Double chemistry.
F = featureless
al = aliphatic
ar = aromatic
am = amorphous
cr = crystalline
Note (4): References to optical data are coded as follows:
FP92 = de Freitas Pacheco et al. (1992A&A...261..579D 1992A&A...261..579D)
KB94 = Kingsburgh & Barlow (1994MNRAS.271..257K 1994MNRAS.271..257K)
Cu96 = Cuisinier et al. (1996A&A...307..215C 1996A&A...307..215C, Cat. J/A+A/307/215)
Ra97 = Ratag et al. (1997A&AS..126..297R 1997A&AS..126..297R, Cat. J/A+AS/126/297)
Cu00 = Cuisinier et al. (2000A&A...353..543C 2000A&A...353..543C)
Es01 = Escudero & Costa (2001A&A...380..300E 2001A&A...380..300E, Cat. J/A+A/380/300)
KH01 = Kwitter & Henry (2001ApJ...562..804K 2001ApJ...562..804K)
Pe01 = Pena et al. (2001A&A...367..983P 2001A&A...367..983P)
Mi02 = Milingo et al. (2002ApJS..138..279M 2002ApJS..138..279M)
Es04 = Escudero et al. (2004A&A...414..211E 2004A&A...414..211E)
Ex04 = Exter et al. (2004MNRAS.349.1291E 2004MNRAS.349.1291E)
Go04 = Gorny et al. (2004A&A...427..231G 2004A&A...427..231G, Cat. J/A/427/231)
Gi07 = Girard et al. (2007A&A...463..265G 2007A&A...463..265G, Cat. J/A+A/463/265)
WL07 = Wang & Liu (2007MNRAS.381..669W 2007MNRAS.381..669W)
Go09 = Gorny et al. (2009A&A...500.1089G 2009A&A...500.1089G, Cat. J/A+A/500/1089)
Ca10 = Cavichia et al. (2010RMxAA..46..159C 2010RMxAA..46..159C)
He10 = Henry et al. (2010ApJ...724..748H 2010ApJ...724..748H, Cat. J/ApJ/724/748)
Go14 = Gorny (2014, A&A, accepted)
t.w. = this work
Note (5): If extinction at Hβ is not given original data were already
dereddened.
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Acknowledgements:
Domingo Anibal Garcia-Hernandez, agarcia(at)iac.es
(End) Patricia Vannier [CDS] 10-Jun-2014