J/MNRAS/446/3562 Abundances of red giants in NGC752 (Bocek Topcu+, 2015)
The chemical compositions and evolutionary status of red giants in the open
cluster NGC 752.
Bocek Topcu G., Afsar M., Schaeuble M., Sneden C.
<Mon. Not. R. Astron. Soc. 446, 3562 (2015)>
=2015MNRAS.446.3562B 2015MNRAS.446.3562B
ADC_Keywords: Clusters, open ; Stars, giant ; Equivalent widths
Keywords: stars: abundances, atmosphere, evolution -
open clusters and associations: individual: NGC 752
Abstract:
We present detailed chemical compositions of 10 red giant star members
of the Galactic (open) cluster NGC 752, derived from high-resolution
(R∼60000), high signal-to-noise (S/N≥140) spectra. We confirmed
cluster memberships by measuring the stellar radial velocities, and by
deriving model atmosphere parameters (Teff, logg, [Fe/H] and ξt)
from equivalent widths of FeI, FeII, TiI, and TiII lines. The
metallicity we obtained for NGC 752 ([Fe/H]=-0.02±0.05) is in good
agreement with previous studies. We derived abundances of alpha (Mg,
Si, Ca), light odd-Z (Na, Al), Fe-group (Sc, Ti, V, Cr, Mn, Fe, Co,
Ni, Cu, Zn), n-capture (Y, La, Nd, Eu), and p-capture (Li, C, N, O)
species for each star. Furthermore, we also derived abundances of the
LiCNO p-capture element group and carbon isotopic ratios, using
synthetic spectrum analyses of the LiI 6707Å resonance doublet,
the [OI] line at 6300Å, the CH G-band features near 4311 and
4325Å, the C2 bandheads at 5160 and 563Å, and 12,13CN red
system lines in the 7995-8040Å region. By applying recent
isochrones to NGC 752 photometry, and comparing the colour-magnitude
diagram information to our Li abundances and 12C/13C ratios, we
suggest that the 10 observed red giants can be separated into three
first-ascent, six red-clump and one red horizontal branch star.
Description:
High-resolution spectra of the selected NGC 752 members were gathered
with the Robert G. Tull Cross-Dispersed Echelle spectrograph on the
2.7m Harlan J. Smith Telescope at McDonald Observatory.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
stars.dat 140 12 Observed NGC 752 red giants, observing logs and
radial velocities (tables 2 & 3 of the paper)
table4.dat 33 225 Linelist of species
table5.dat 73 193 Equivalent width measurements of the NGC 752
red giant members
table10.dat 184 25 NGC 752 member ID of individual stars and
average abundances <[X/Fe]> for NGC 752
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See also:
J/PASP/106/281 : Photometry and radial velocities in NGC752 (Daniel+, 1994)
J/A+A/339/423 : Velocities of red giants in NGC 752 (Mermilliod+ 1998)
J/A+A/490/113 : X-ray sources in NGC 752 (Giardino+, 2008)
J/A+A/485/303 : 1309 stars and 166 OCl radial velocities (Mermilliod+, 2008)
J/MNRAS/419/1350 : Red giants abundances in 4 open clusters (Reddy+, 2012)
Byte-by-byte Description of file: stars.dat
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Bytes Format Units Label Explanations
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1 A1 --- Mm [MN] Cluster Member or Non-member
3- 5 A3 --- --- [MMU]
7- 10 I4 --- MMU Star MMU number,
<Cl* NGC 752 MMU NNNN> in Simbad
12- 20 A9 --- OName Other name
22- 23 I2 h RAh Right ascension (J2000) (1)
25- 26 I2 min RAm Right ascension (J2000) (1)
28- 33 F6.3 s RAs Right ascension (J2000) (1)
35 A1 --- DE- Declination sign (J2000) (1)
36- 37 I2 deg DEd Declination (J2000) (1)
39- 40 I2 arcmin DEm Declination (J2000) (1)
42- 46 F5.2 arcsec DEs Declination (J2000) (1)
48- 52 F5.2 mag Bmag B magnitude (2)
54- 57 F4.2 mag Vmag V magnitude (2)
59- 62 F4.2 mag Kmag K magnitude (1)
64- 68 F5.2 mas/yr pmRA Proper motion along RA (1)
70- 74 F5.1 mas/yr pmDE Proper motion along DE (1)
76- 88 A13 --- Date Observation date (YYYY Month)
91- 94 I4 s Texp Exposure time
96- 98 I3 --- S/N [140/290] Signal-to-Noise ratio
100-105 F6.2 km/s RV This study radial velocity
107-110 F4.2 km/s e_RV rms uncertainty on RVa
112-117 F6.2 km/s RVb Mermilliod et al. (2008A&A...485..303M 2008A&A...485..303M,
Cat. J/A+A/485/303) radial velocity
119-122 F4.2 km/s e_RVb rms uncertainty on RVb
124-127 F4.2 km/s RVc ? Carrera & Pancino (2011A&A...535A..30C 2011A&A...535A..30C)
radial velocity
129-132 F4.2 km/s e_RVc ? rms uncertainty on RVc
134-136 F3.1 km/s RVd ? Reddy et al. (2012MNRAS.419.1350R 2012MNRAS.419.1350R)
radial velocity
138-140 F3.1 km/s e_RVd ? rms uncertainty on RVd
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Note (1): Coordinates, K magnitudes and proper motions are taken from
Simbad data base.
Note (2): B and V magnitudes are from Daniel et al. (1994PASP..106..281D 1994PASP..106..281D,
Cat. J/PASP/106/281).
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 5 A5 --- Ion Species identification
7- 13 F7.2 0.1nm lambda [4310/8000] Wavelength λ (Å)
15- 19 F5.3 eV LEP ? Lower Excitation potential of the transition
21- 26 F6.3 [-] loggf ? Log of the oscillator strength
28- 30 A3 --- EW/Syn Method of analysis: EW=Equivalent Width, or
syn=spectrum synthesis
32- 33 I2 --- r_loggf Reference for log(gf) (1)
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Note (1): References as follows:
1 = KURUCZ
2 = Masseron et al. (2014A&A...571A..47M 2014A&A...571A..47M)
3 = Brooke et al. (2014ApJS..210...23B 2014ApJS..210...23B, Cat. J/ApJS/210/23)
4 = Sneden et al. (2014ApJS..214...26S 2014ApJS..214...26S, Cat. J/ApJS/214/26)
5 = Caffau et al. (2008A&A...488.1031C 2008A&A...488.1031C)
6 = NIST
7 = Lobel (2011CaJPh..89..395L 2011CaJPh..89..395L)
8 = VALD
9 = For & Sneden (2010AJ....140.1694F 2010AJ....140.1694F, Cat. J/AJ/140/1694)
10 = Carrera & Pancino (2011A&A...535A..30C 2011A&A...535A..30C, Cat. J/A+A/535/A30)
11 = Barbuy et al. (2007AJ....134.1613B 2007AJ....134.1613B)
12 = Reddy et al. (2012MNRAS.419.1350R 2012MNRAS.419.1350R, Cat. J/MNRAS/419/1350)
13 = Hamdani et al. (2000A&A...360..509H 2000A&A...360..509H, Cat. J/A+A/360/509)
14 = Smith & Raggett (1981JPhB...14.4015S 1981JPhB...14.4015S)
15 = Marsden et al. (1988JOSAB...5..606M 1988JOSAB...5..606M)
16 = Lawler et al. (2013ApJS..205...11L 2013ApJS..205...11L)
17 = Wood et al. (2013ApJS..208...27W 2013ApJS..208...27W, Cat. J/ApJS/208/27)
18 = Sobeck et al. (2007ApJ...667.1267S 2007ApJ...667.1267S, Cat. J/ApJ/667/1267)
19 = Nilsson et al. (2006A&A...445.1165N 2006A&A...445.1165N)
20 = Den Hartog et al. (2011ApJS..194...35D 2011ApJS..194...35D, Cat. J/ApJS/194/35)
21 = Ramirez & Allende Prieto (2011ApJ...743..135R 2011ApJ...743..135R)
22 = O'Brian et al. (1991JOSAB...8.1185O 1991JOSAB...8.1185O)
23 = Lambert et al. (1996ApJS..103..183L 1996ApJS..103..183L)
24 = Melendez & Barbuy (2009A&A...497..611M 2009A&A...497..611M)
25 = Wood et al. (2014ApJS..211...20W 2014ApJS..211...20W, Cat. J/ApJS/211/20)
26 = Hannaford et al. (1982ApJ...261..736H 1982ApJ...261..736H)
27 = Lawler et al. (2001ApJ...556..452L 2001ApJ...556..452L)
28 = Den Hartog et al. (2003ApJS..148..543D 2003ApJS..148..543D)
29 = Lawler et al. (2001ApJ...563.1075L 2001ApJ...563.1075L)
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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- 5 A5 --- Ion Species identification
7- 13 F7.2 0.1nm lambda [4545/7839] Wavelength λ (Å)
15- 19 F5.1 0.1pm EW1 ? MMU 1 equivalent width (mÅ)
21- 25 F5.1 0.1pm EW3 ? MMU 3 equivalent width (mÅ)
27- 31 F5.1 0.1pm EW11 ? MMU 11 equivalent width (mÅ)
33- 37 F5.1 0.1pm EW24 ? MMU 24 equivalent width (mÅ)
39- 43 F5.1 0.1pm EW27 ? MMU 27 equivalent width (mÅ)
45- 49 F5.1 0.1pm EW77 ? MMU 77 equivalent width (mÅ)
51- 55 F5.1 0.1pm EW137 ? MMU 137 equivalent width (mÅ)
57- 61 F5.1 0.1pm EW295 ? MMU 295 equivalent width (mÅ)
63- 67 F5.1 0.1pm EW311 ? MMU 311 equivalent width (mÅ)
69- 73 F5.1 0.1pm EW1367 ? MMU 1367 equivalent width (mÅ)
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Byte-by-byte Description of file: table10.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- [X/Fe] Abundance measured
10 A1 --- n_[X/Fe] 's' for spectrum synthesis
12- 16 F5.2 [Sun] MMU1 MMU1 [X/Fe] number abundance
18- 19 I2 --- N1 [1/62] Number of lines (NL) or number of
spectrum synthesis region (NSyn, n_[X/Fe]='s')
20 A1 --- n_N1 [s] s for number of spectra in N1,
else number of lines
22- 25 F4.2 [Sun] s_MMU1 ? Scatter of abundance
27- 31 F5.2 [Sun] MMU3 MMU3 [X/Fe] number abundance
33- 34 I2 --- N3 [1/62] Number of lines (NL) or number of
spectrum synthesis region (NSyn, n_[X/Fe]='s')
35 A1 --- n_N3 [s] s for number of spectra in N3,
else number of lines
37- 40 F4.2 [Sun] s_MMU3 ? Scatter of abundance
42- 46 F5.2 [Sun] MMU11 MMU11 [X/Fe] number abundance
48- 49 I2 --- N11 [1/62] Number of lines (NL) or number of
spectrum synthesis region (NSyn, n_[X/Fe]='s')
50 A1 --- n_N11 [s] s for number of spectra in N11,
else number of lines
52- 55 F4.2 [Sun] s_MMU11 ? Scatter of abundance
57- 61 F5.2 [Sun] MMU24 MMU24 [X/Fe] number abundance
63- 64 I2 --- N24 [1/62] Number of lines (NL) or number of
spectrum synthesis region (NSyn, n_[X/Fe]='s')
65 A1 --- n_N24 [s] s for number of spectra in N24,
else number of lines
67- 70 F4.2 [Sun] s_MMU24 ? Scatter of abundance
72- 76 F5.2 [Sun] MMU27 MMU27 [X/Fe] number abundance
78- 79 I2 --- N27 [1/62] Number of lines (NL) or number of
spectrum synthesis region (NSyn, n_[X/Fe]='s')
80 A1 --- n_N27 [s] s for number of spectra in N27,
else number of lines
82- 85 F4.2 [Sun] s_MMU27 ? Scatter of abundance
87- 91 F5.2 [Sun] MMU77 MMU77 [X/Fe] number abundance
93- 94 I2 --- N77 [1/62] Number of lines (NL) or number of
spectrum synthesis region (NSyn, n_[X/Fe]='s')
95 A1 --- n_N77 [s] s for number of spectra in N77,
else number of lines
97-100 F4.2 [Sun] s_MMU77 ? Scatter of abundance
102-106 F5.2 [Sun] MMU137 MMU137 [X/Fe] number abundance
108-109 I2 --- N137 [1/62] Number of lines (NL) or number of
spectrum synthesis region (NSyn, n_[X/Fe]='s')
110 A1 --- n_N137 [s] s for number of spectra in N137,
else number of lines
112-115 F4.2 [Sun] s_MMU137 ? Scatter of abundance
117-121 F5.2 [Sun] MMU295 MMU295 [X/Fe] number abundance
123-124 I2 --- N295 [1/62] Number of lines (NL) or number of
spectrum synthesis region (NSyn, n_[X/Fe]='s')
125 A1 --- n_N295 [s] s for number of spectra in N295,
else number of lines
127-130 F4.2 [Sun] s_MMU295 ? Scatter of abundance
132-136 F5.2 [Sun] MMU311 MMU311 [X/Fe] number abundance
138-139 I2 --- N311 [1/62] Number of lines (NL) or number of
spectrum synthesis region (NSyn, n_[X/Fe]='s')
140 A1 --- n_N311 [s] s for number of spectra in N311,
else number of lines
142-145 F4.2 [Sun] s_MMU311 ? Scatter of abundance
147-151 F5.2 [Sun] MMU1367 MMU1367 [X/Fe] number abundance
153-154 I2 --- N1367 [1/62] Number of lines (NL) or number of
spectrum synthesis region (NSyn, n_[X/Fe]='s')
155 A1 --- n_N1367 [s] s for number of spectra in N1367,
else number of lines
157-160 F4.2 [Sun] s_MMU1367 ? Scatter of abundance
162-166 F5.2 [Sun] <[X/Fe]> Average abundance for NGC 752
168-171 F4.2 [Sun] s_<[X/Fe]> σ for average abundance of NGC 752
173-177 F5.2 [Sun] Red12 ? Average abundance of NGC 752 from Reddy et
al., 2012, Cat. J/MNRAS/419/1350
179-183 F5.2 --- Car11 ? Average abundance of NGC 752 from
Carrera & Pancino, 2011, Cat. J/A+A/535/A30
184 A1 --- n_Car11 [a] Average abundance without ionization (1)
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Note (1): Car11 lists the average abundances of the same species, e.g. [FeI/H]
and [FeII/H] abundances are given as an average: [Fe/H]. Here, we list the
abundances from Car11 according to species with the majority of the
analysed lines.
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Acknowledgements:
Gamze Bocek Topcu, gamzebocek(at)gmail.com
(End) Patricia Vannier [CDS] 29-Dec-2014