J/AJ/164/185 Abundances in extincted Milky Way planetary nebulae (Manea+, 2022)
Chemical Abundances of Eight Highly-extincted Milky Way Planetary Nebulae.
Manea C., Dinerstein H.L., Sterling N.C., Zeimann G.
<Astron. J., 164, 185 (2022)>
=2022AJ....164..185M 2022AJ....164..185M
ADC_Keywords: Milky Way; Planetary nebulae; Abundances; Spectra, optical;
Spectra, infrared; Positional data; Radial velocities
Keywords: Planetary nebulae ; Chemical abundances
Abstract:
Low- and intermediate-mass (0.8M☉<M<8M☉) stars that evolve
into planetary nebulae (PNe) play an important role in tracing and
driving Galactic chemical evolution. Spectroscopy of PNe enables
access to both the initial composition of their progenitor stars and
products of their internal nucleosynthesis, but determining accurate
ionic and elemental abundances of PNe requires high-quality optical
spectra. We obtained new optical spectra of eight highly-extincted PNe
with limited optical data in the literature using the Low Resolution
Spectrograph 2 on the Hobby-Eberly Telescope. Extinction coefficients,
electron temperatures and densities, and ionic and elemental
abundances of up to 11 elements (He, N, O, Ne, S, Cl, Ar, K, Fe, Kr,
and Xe) are determined for each object in our sample. Where available,
astrometric data from Gaia EDR3 is used to kinematically characterize
the probability that each object belongs to the Milky Way's thin disk,
thick disk, or halo. Four of the PNe show kinematic and chemical signs
of thin disk membership, while two may be members of the thick disk.
The remaining two targets lack Gaia data, but their solar O, Ar, and
Cl abundances suggest thin disk membership. Additionally, we report
the detection of broad emission features from the central star of
M3-35. Our results significantly improve the available information on
the nebular parameters and chemical compositions of these objects,
which can inform future analyses.
Description:
The targets in our sample were observed in queue mode across 2
trimesters using the Low Resolution Spectrograph 2 (LRS2) on the
upgraded Hobby-Eberly Telescope (HET) in west Texas. LRS2 is a
low-resolution (R∼1900) optical integral-field unit spectrograph
composed of two arms that simultaneously observe two 6"x12" fields of
view separated by 100". The blue arm consists of a pair of channels
with spectral ranges of ∼3640-4670Å and ∼4540-7000Å, while the
red arm is composed of two channels covering ∼6430-8450Å and
∼8230-10560Å.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 70 8 Targets and observations
table5.dat 100 6 Radial velocities, distances, galactic positions
tablea1.dat 127 47 Observed fluxes
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See also:
I/352 : Distances to 1.47 billion stars in Gaia EDR3 (Bailer-Jones+, 2021)
VI/64 : Recombination line intensities for hydrogenic ions (Storey+ 1995)
VI/141 : Nebular [OIII] collision strengths - SSB (Storey+, 2014)
J/A+AS/116/573 : Transitions for FeIII (Quinet 1996)
J/A+AS/123/159 : IRON Project. XXII. C and O radiative rates (Galavis+ 1997)
J/ApJ/526/544 : Collision strengths in S III (Tayal+, 1999)
J/A+A/387/1135 : NII effective recombination coefficients (Kisielius+, 2002)
J/A+A/403/659 : Classification of WR planetary nebulae (Acker+, 2003)
J/A+A/410/527 : Abundances in the Galactic disk (Bensby+, 2003)
J/A+A/426/717 : Oscillator strengths for ClII lines (Tayal+, 2004)
J/A+A/463/265 : Chemical comp. of 48 WR planetary nebulae (Girard+, 2007)
J/ApJ/659/1265 : Emission lines in 4 planetary nebulae (Sharpee+, 2007)
J/ApJS/188/32 : Breit-Pauli transition probabilities for SII (Tayal+, 2010)
J/MNRAS/415/181 : Deep spectroscopy of NGC 7009 (Fang+, 2011)
J/ApJ/783/130 : Parallaxes of high mass star forming regions (Reid+, 2014)
J/MNRAS/452/2606 : Deep echelle spectro. of NGC3918 (Garcia-Rojas+, 2015)
J/ApJS/218/25 : Abundances in PNe. III. Se and Kr (Sterling+, 2015)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- Name Target name
11- 20 A10 --- PNG Target PNG identifier (PN GLLL.l+BB.b)
22- 25 F4.1 arcsec Diam [2/18.6] Optical diameters (1)
27- 35 A9 --- CSType Central Star Type (mag) (2)
37 A1 --- f_CSType [*] Although not previously reported in the
litterature, M3-35 displays weak stellar wind
lines
39- 42 I4 yr Obs.Y [2020] Year of observation
44- 46 A3 "month" Obs.M Month of observation
48- 49 I2 d Obs.D Day of observation
51- 54 I4 s Texp-L [370/2674] Exposure time (long)
56- 58 I3 s Texp-S [30/120] Exposure time (short)
60- 70 A11 --- Note Observing notes
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Note (1): Optical diameters from the HASH PN database
(Parker+, 2016JPhCS.728c2008P 2016JPhCS.728c2008P). Diameters for non-circular nebulae are
reported as averages of the minor and major axes.
Note (2): Central star type from Acker & Neiner, 2003, J/A+A/403/659
with the exception of M3-35.
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Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- Name Target name
11- 16 F6.1 km/s RVel [-189/107] Radial velocity
18- 19 I2 km/s e_RVel [10/12] Error on RVel
21- 24 F4.2 kpc Dist [1.67/6.24] Distance
26- 29 F4.2 kpc e_Dist [0.1/3] Negative error on Dist
31- 34 F4.2 kpc E_Dist [0.2/3] Positive error on Dist
36- 40 F5.2 kpc X [4.47/12.5] Galactocentric X position
42- 45 F4.2 kpc e_X [0.06/2] Error on X
47- 50 F4.2 kpc Y [1.55/5.92] Galactocentric Y position
52- 55 F4.2 kpc e_Y [0.1/2] Error on Y
57- 61 F5.2 kpc Z [-0.24/0.72] Galactocentric Z position
63- 66 F4.2 kpc e_Z [0/0.2] Error on Z
68- 72 F5.1 km/s U [37.6/188] Galactrocentric U velocity
74- 77 F4.1 km/s e_U [5/43] Error on U
79- 84 F6.1 km/s V [-214/-32] Galactocentric V velocity
86- 89 F4.1 km/s e_V [6/60] Error on V
91- 95 F5.1 km/s W [-50/1.5] Galactocentric W velocity
97-100 F4.1 km/s e_W [1/24] Error on W
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Byte-by-byte Description of file: tablea1.dat
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Bytes Format Units Label Explanations
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1- 6 A6 --- Ion Studied species
8- 12 I5 0.1nm Wave [3726/10210] Wavelength (Å)
14- 20 F7.2 --- Hen2-459 [0.64/2961]? Observed fluxes for Hen2-459
22- 25 F4.2 --- e_Hen2-459 [0.05/3]? Error on Hen2-459
27- 34 F8.2 --- K3-17 [2.15/24657]? Observed fluxes for K3-17
36- 40 F5.2 --- e_K3-17 [0.1/38]? Error on K3-17
42- 49 F8.2 --- K3-55 [1.63/13693]? Observed fluxes for K3-55
51- 55 F5.2 --- e_K3-55 [0.2/27]? Error on K3-55
57- 63 F7.2 --- K3-60 [0.2/1820]? Observed fluxes for K3-60
65- 70 F6.2 --- e_K3-60 [0.03/172]? Error on K3-60
72- 77 F6.2 --- K3-62 [0.12/842]? Observed fluxes for K3-62
79- 83 F5.2 --- e_K3-62 [0.03/14]? Error on K3-62
85- 92 F8.3 --- M2-43 [0.01/2616]? Observed fluxes for M2-43
94- 99 F6.4 --- e_M2-43 [0.0003/6]? Error on M2-43
101-108 F8.3 --- M3-35 [0.01/1104]? Observed fluxes for M3-35
110-115 F6.3 --- e_M3-35 [0.001/48]? Error on M3-35
117-122 F6.2 --- M4-18 [0.21/426]? Observed fluxes for M4-18
124-127 F4.2 --- e_M4-18 [0.03/3]? Error on M4-18
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History:
From electronic version of the journal
(End) Prepared by Coralie Fix [CDS], 16-Jan-2023