J/AJ/136/375 Chemical composition of LMC red giants (Mucciarelli+, 2008)
The chemical composition of red giant stars in four intermediate-age clusters
of the Large Magellanic Cloud.
Mucciarelli A., Carretta E., Origlia L., Ferraro F.R.
<Astron. J., 136, 375-388 (2008)>
=2008AJ....136..375M 2008AJ....136..375M
ADC_Keywords: Magellanic Clouds ; Clusters, globular ; Stars, giant ;
Abundances
Keywords: globular clusters: general - Magellanic Clouds - stars: abundances -
techniques: spectroscopic
Abstract:
This paper presents the chemical abundance analysis of a sample of 27
red giant stars located in four populous intermediate-age globular
clusters in the Large Magellanic Cloud, namely NGC 1651, 1783, 1978,
and 2173. This analysis is based on high-resolution (R∼47000)
spectra obtained with the UVES@VLT spectrograph. For each cluster we
derived up to 20 abundance ratios sampling the main chemical elemental
groups, namely light odd-Z, α iron-peak, and neutron-capture
elements.
Description:
The observations were performed by using the multi-object spectrograph
FLAMES, mounted at the Kueyen 8m telescope (UT2) of the ESO Very
Large Telescope (VLT) on Cerro Paranal (Chile).
The spectra were acquired during three nights allocated to the ESO
Program 072.D-0342(A). Additional observations were performed as
back-up programs in two Visitors Mode runs (ESO Program 072.D-0337(A)
and ESO Program 074.D-0369(A)).
JHKs images have been obtained at ESO, La Silla, on 2001 December
28-30 with the near-IR imager/spectrometer SOFI mounted at the ESO
3.5 m NTT. These observations are described in Mucciarelli et al.
(2006ApJ...646..939M 2006ApJ...646..939M). The photometric catalogs (n1651.dat, n1783.dat,
new1978.dat, n2173.dat) were provided by the authors.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 50 27 Information about the target stars
table2.dat 41 8910 Equivalent widths from UVES spectra for the
sample stars
table4.dat 57 27 Adopted atmospheric parameters and inferred
neutral and ionized iron abundances
tab5-9.dat 248 27 Chemical abundances, number of measured lines,
and line-to-line scatter for the sample stars
n1651.dat 94 678 *NGC 1651 photometric catalog
n1783.dat 94 1904 *NGC 1783 photometric catalog
new1978.dat 94 2682 *NGC 1978 photometric catalog
n2173.dat 94 680 *NGC 2173 photometric catalog
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Note on n1651.dat, n1783.dat, new1978.dat, n2173.dat: additional photometric
catalogs were provided by Dr A. Mucciarelli in August 2012.
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See also:
J/AJ/132/1630 : Magellanic Cloud clusters CaII spectroscopy (Grocholski+, 2006)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 7 A7 --- Name Star name (NNNN-NN)
9- 10 I2 --- S/N Signal-to-noise ratio
12- 16 F5.1 km/s HV Heliocentric velocity
18- 22 F5.2 mag J0mag Deredenned J magnitude
24- 27 F4.2 mag (J-K)0 Deredenned J-K colour index
29- 38 F10.7 deg RAdeg Right ascension in decimal degrees (J2000)
40- 50 F11.7 deg DEdeg Declination in decimal degrees (J2000)
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 7 A7 --- Name Star name
9- 13 A5 --- Ion Ion identification
15- 21 F7.2 0.1nm lambda Wavelength in Angstroms (Å)
23- 26 F4.2 eV ExPot Excitation Potential
28- 33 F6.2 [-] log(gf) ? Log of the oscillator strength
35- 39 F5.1 0.1pm EW ? Equivalent width (mÅ)
41 A1 --- f_EW [s] 's' when a synthetic spectrum was used
in abundance determination
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 7 A7 --- Name Star name
9- 12 I4 K Teff Effective temperature
14- 17 F4.2 [cm/s2] logg Gravity surface
19- 23 F5.2 [Sun] [A/H] Abundance [A/H]
25- 28 F4.2 km/s Vturb Microturbulent velocity
30- 32 I3 --- o_[FeI/H] Number of lines used for [FeI/H]
34- 38 F5.2 [Sun] [FeI/H] Abundance [FeI/H] (1)
40- 43 F4.2 [Sun] e_[FeI/H] rms uncertainty on [FeI/H]
45- 46 I2 --- o_[FeII/H] ?=- Number of lines used for [FeII/H]
48- 52 F5.2 [Sun] [FeII/H] ?=- Abundance [FeII/H] (1)
54- 57 F4.2 [Sun] e_[FeII/H] ?=- rms uncertainty on [FeII/H]
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Note (1): Adopted Reference Solar are logn(FeI)=7.54 and logn(FeII)=7.49.
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Byte-by-byte Description of file: tab5-9.dat
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Bytes Format Units Label Explanations
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1- 7 A7 --- Name Star name
9 I1 --- o_[O/Fe] Number of lines measured for [O/Fe]
11- 15 F5.2 [Sun] [O/Fe] Abundance [O/Fe] (1) (2)
17- 20 F4.2 [Sun] e_[O/Fe] ?=- rms uncertainty on [O/Fe]
22 I1 --- o_[Na/Fe] Number of lines measured for [Na/Fe]
24- 28 F5.2 [Sun] [Na/Fe] Abundance [Na/Fe] (1)
30- 33 F4.2 [Sun] e_[Na/Fe] rms uncertainty on [Na/Fe] (2)
35 I1 --- o_[Mg/Fe] Number of lines measured for [Mg/Fe]
37- 41 F5.2 [Sun] [Mg/Fe] Abundance [Mg/Fe] (1)
43- 46 F4.2 [Sun] e_[Mg/Fe] rms uncertainty on [Mg/Fe]
48 I1 --- o_[Al/Fe] Number of lines measured for [Al/Fe]
50- 54 F5.2 [Sun] [Al/Fe] Abundance [Al/Fe] (1)
56- 59 F4.2 [Sun] e_[Al/Fe] rms uncertainty on [Al/Fe]
61 I1 --- o_[Si/Fe] Number of lines measured for [Si/Fe]
63- 67 F5.2 [Sun] [Si/Fe] Abundance [Si/Fe] (1)
69- 72 F4.2 [Sun] e_[Si/Fe] ?=- rms uncertainty on [Si/Fe]
74- 75 I2 --- o_[Ca/Fe] Number of lines measured for [Ca/Fe]
77- 81 F5.2 [Sun] [Ca/Fe] Abundance [Ca/Fe] (1)
83- 86 F4.2 [Sun] e_[Ca/Fe] rms uncertainty on [Ca/Fe]
88 I1 --- o_[Sc/Fe] Number of lines measured for [Sc/Fe]
90- 94 F5.2 [Sun] [Sc/Fe] Abundance [Sc/Fe] (1) (2)
96- 99 F4.2 [Sun] e_[Sc/Fe] rms uncertainty on [Sc/Fe]
101-102 I2 --- o_[Ti/Fe] Number of lines measured for [Ti/Fe]
104-108 F5.2 [Sun] [Ti/Fe] Abundance [Ti/Fe] (1)
110-113 F4.2 [Sun] e_[Ti/Fe] rms uncertainty on [Ti/Fe]
115-116 I2 --- o_[V/Fe] Number of lines measured for [V/Fe]
118-122 F5.2 [Sun] [V/Fe] Abundance [V/Fe] (1) (2)
124-127 F4.2 [Sun] e_[V/Fe] ?=- rms uncertainty on [V/Fe]
129-130 I2 --- o_[Cr/Fe] Number of lines measured for [Cr/Fe]
132-136 F5.2 [Sun] [Cr/Fe] Abundance [Cr/Fe] (1)
138-141 F4.2 [Sun] e_[Cr/Fe] rms uncertainty on [Cr/Fe]
143 I1 --- o_[Co/Fe] Number of lines measured for [Co/Fe]
145-149 F5.2 [Sun] [Co/Fe] Abundance [Co/Fe] (1) (2)
151-154 F4.2 [Sun] e_[Co/Fe] rms uncertainty on [Co/Fe]
156-157 I2 --- o_[Ni/Fe] Number of lines measured for [Ni/Fe]
159-163 F5.2 [Sun] [Ni/Fe] Abundance [Ni/Fe] (1)
165-168 F4.2 [Sun] e_[Ni/Fe] rms uncertainty on [Ni/Fe]
170 I1 --- o_[Y/Fe]II Number of lines measured for [Y/Fe]II
172-176 F5.2 [Sun] [Y/Fe]II Abundance [Y/Fe]II (1)
178-181 F4.2 [Sun] e_[Y/Fe]II ?=- rms uncertainty on [Y/Fe]II
183 I1 --- o_[Zr/Fe] Number of lines measured for [Zr/Fe]
185-189 F5.2 [Sun] [Zr/Fe] Abundance [Zr/Fe] (1)
191-194 F4.2 [Sun] e_[Zr/Fe] ?=- rms uncertainty on [Zr/Fe]
196 I1 --- o_[Ba/Fe]II Number of lines measured for [Ba/Fe]II
198-202 F5.2 [Sun] [Ba/Fe]II Abundance [Ba/Fe]II (1)
204-207 F4.2 [Sun] e_[Ba/Fe]II rms uncertainty on [Ba/Fe]II
209 I1 --- o_[La/Fe]II ?=- Number of lines measured for [La/Fe]II
211-215 F5.2 [Sun] [La/Fe]II ?=- Abundance [La/Fe]II (1)
217-220 F4.2 [Sun] e_[La/Fe]II ?=- rms uncertainty on [La/Fe]II
221 I1 --- o_[Ce/Fe]II ?=- Number of lines measured for [Ce/Fe]II
223-227 F5.2 [Sun] [Ce/Fe]II ?=- Abundance [Ce/Fe]II (1)
229 I1 --- o_[Nd/Fe]II ?=- Number of lines measured for [Nd/Fe]II
231-235 F5.2 [Sun] [Nd/Fe]II ?=- Abundance [Nd/Fe]II (1)
237-240 F4.2 [Sun] e_[Nd/Fe]II ?=- rms uncertainty on [Nd/Fe]II
242 I1 --- o_[Eu/Fe]II ?=- Number of lines measured for [Eu/Fe]II
244-248 F5.2 [Sun] [Eu/Fe]II ?=- Abundance [Eu/Fe]II (1) (2)
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Note (1): Solar adopted values:
logn(O) =8.79, logn(Na)=6.21, logn(Mg)=7.43, logn(Al)=6.23,
logn(Si)=7.53, logn(Ca)=6.27, logn(Sc)=3.13, logn(Ti)=5.00,
logn(V) =3.97, logn(Cr)=5.67, logn(Co)=4.92, logn(Ni)=6.28,
logn(Y) =2.22, logn(Zr)=2.60, logn(Ba)=2.22, logn(La)=1.22,
logn(Ce)=1.55, logn(Nd)=1.50, logn(Eu)=0.51
Note (2): Oxygen and Europium abundances are derived from spectral synthesis.
Sodium abundances are corrected for departures from LTE.
Scandium, vanadium and cobalt abundances include hfs corrections.
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Byte-by-byte Description of file: n1651.dat n1783.dat new1978.dat n2173.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- Seq Sequential number
6- 12 F7.4 mag Jmag ?=0.000 J magnitude
14- 19 F6.4 mag e_Jmag ?=0.000 Error in Jmag
21- 27 F7.4 mag Hmag ?=0.000 H magnitude
29- 34 F6.4 mag e_Hmag ?=0.000 Error in Hmag
36- 42 F7.4 mag Kmag ?=0.000 K magnitude
44- 49 F6.4 mag e_Kmag ?=0.000 Error in Kmag
51- 60 F10.7 deg RAdeg Right ascension in decimal hours (J2000)
62- 72 F11.7 deg DEdeg Declination in decimal hours (J2000)
74- 82 F9.4 pix xpos x position
84- 92 F9.4 pix ypos y position
94 I1 --- ns [1] ns
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References:
Mucciarelli et al., Red giant stars in the LMC clusters 2006ApJ...646..939M 2006ApJ...646..939M
History:
* 26-Jan-2011: From electronic version of the journal
* 13-Aug-2012: Photometric catalogs (n1651.dat, n1783.dat, new1978.dat
and n2173.dat) kindly provided by Dr A. Mucciarelli.
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 26-Jan-2011