J/AJ/130/1177 C and N abundances for M15 stars (Cohen+, 2005)
C and N abundances in stars at the base of the red giant branch in M15.
Cohen J.G., Briley M.M., Stetson P.B.
<Astron. J., 130, 1177-1193 (2005)>
=2005AJ....130.1177C 2005AJ....130.1177C
ADC_Keywords: Clusters, globular ; Abundances ; Photometry, infrared
Keywords: globular clusters: general - globular clusters: individual (M15) -
stars: abundances - stars: evolution
Abstract:
We present an analysis of a large sample of moderate-resolution Keck
Low Resolution Imaging Spectrometer spectra of subgiants and stars at
the base of the red giant branch (RGB) in the Galactic globular
cluster (GC) M15 (NGC 7078), most within the range 16.5<V<19.5
(1.2<MV<4.2), with the goal of deriving C abundances (from the G
band of CH) and N abundances (from the NH band at 3360Å).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 42 73 Photometry for the M15 sample
table2.dat 105 68 Deduced C and N abundances for M15 sample
table3.dat 75 18 I(CH) (4305Å band) from synthetic spectra
table4.dat 96 18 I(NH) (3360Å band) from synthetic spectra
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See also:
J/AJ/113/1026 : Fabry-Perot Observations of M15 (Gebhardt+ 1997)
J/AJ/119/2274 : JK Photometry of globular clusters M15 + M56 (Ivanov+, 2000)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 11 A11 --- [CBS2005c] Star identification
([CBS2005c] CMMSSs-MMSS in Simbad) (1)
13 A1 --- f_[CBS2005c] Flag on [CBS2005c] (2)
15- 19 F5.2 mag Vmag The V band magnitude
21- 25 F5.2 mag Imag ? The I band magnitude
27- 31 F5.2 mag Jmag ? The J band magnitude
33- 37 F5.2 mag Kmag ? The K band magnitude
39- 42 F4.2 mag e_Kmag ? Error in Kmag (3)
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Note (1): The star names are derived from their J2000 coordinates.
Star C12345_5432 has coordinates 21 12 34.5 +12 54 32 (J2000).
Note (2): Flag on [CBS2005c], defined as follows:
b = Spectrum appears too strong lined for M15 membership.
d = Crowded.
e = This star is on the extended BHB.
f = This object is actually a close pair.
Note (3): From multiple measurements, indicated if it exceeds 0.05mag.
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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- 11 A11 --- [CBS2005c] Star identification
([CBS2005c] CMMSSs-MMSS in Simbad) (1)
13 A1 --- f_[CBS2005c] Flag on [CBS2005c] (2)
15- 19 F5.2 mag Vmag The V band magnitude
21- 25 F5.2 mag B-V ? The (B-V) color
27- 30 F4.2 mag VMAG Absolute V band magnitude
32 A1 --- l_Teff Limit flag on Teff
33- 37 I5 K Teff Effective temperature
39- 42 F4.2 [cm/s2] log(g) ? Log of the surface gravity
44- 48 F5.3 % CH The CH index (4305Å band)
50- 54 F5.3 % e_CH Uncertainty in CH
56- 61 F6.3 % NH ? The NH index ((3360Å band)
63- 67 F5.3 % e_NH ? Uncertainty in NH
69- 74 F6.3 [Sun] [C/Fe] ? Log of the C/Fe solar number abundance
76- 79 F4.2 [Sun] E_[C/Fe] ? Upper limit uncertainty in [C/Fe]
81- 84 F4.2 [Sun] e_[C/Fe] ? Lower limit uncertainty in [C/Fe]
86- 89 A4 --- f_[N/Fe] Limit flag on [N/Fe]
90- 94 F5.2 [Sun] [N/Fe] ? Log of the N/Fe solar number abundance
96- 99 F4.2 [Sun] E_[N/Fe] ? Upper limit uncertainty in [N/Fe]
101-104 F4.2 [Sun] e_[N/Fe] ? Lower limit uncertainty in [N/Fe]
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Note (1): The star names are derived from their J2000 coordinates.
Star C12345_5432 has coordinates 21 12 34.5 +12 54 32 (J2000).
Note (2): Flag on ID, defined as follows:
a = Hot star on extended HB in M15.
b = This object is a close pair.
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 4 I4 K Teff Effective temperature
6- 9 F4.2 [cm/s2] log(g) Log of surface gravity
11- 15 F5.3 mag VMAG0 Absolute intrinsic V magnitude
17- 21 F5.3 --- CH-1.4 CH index with [C/Fe]=-1.4
23- 27 F5.3 --- CH-1.2 CH index with [C/Fe]=-1.2
29- 33 F5.3 --- CH-1.0 CH index with [C/Fe]=-1.0
35- 39 F5.3 --- CH-0.8 CH index with [C/Fe]=-0.8
41- 45 F5.3 --- CH-0.6 CH index with [C/Fe]=-0.6
47- 51 F5.3 --- CH-0.4 CH index with [C/Fe]=-0.4
53- 57 F5.3 --- CH-0.2 CH index with [C/Fe]=-0.2
59- 63 F5.3 --- CH+0.0 CH index with [C/Fe]=+0.0
65- 69 F5.3 --- CH+0.2 CH index with [C/Fe]=+0.2
71- 75 F5.3 --- CH+0.4 CH index with [C/Fe]=+0.4
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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- 5 F5.3 mag VMAG0 Absolute intrinsic V magnitude
7- 12 F6.3 --- NH-0.6 NH index with [N/Fe]=-0.6
14- 19 F6.3 --- NH-0.4 NH index with [N/Fe]=-0.4
21- 26 F6.3 --- NH-0.2 NH index with [N/Fe]=-0.2
28- 33 F6.3 --- NH+0.0 NH index with [N/Fe]=+0.0
35- 40 F6.3 --- NH+0.2 NH index with [N/Fe]=+0.2
42- 47 F6.3 --- NH+0.4 NH index with [N/Fe]=+0.4
49- 54 F6.3 --- NH+0.8 NH index with [N/Fe]=+0.8
56- 60 F5.3 --- NH+1.0 NH index with [N/Fe]=+1.0
62- 66 F5.3 --- NH+1.2 NH index with [N/Fe]=+1.2
68- 72 F5.3 --- NH+1.4 NH index with [N/Fe]=+1.4
74- 78 F5.3 --- NH+1.6 NH index with [N/Fe]=+1.6
80- 84 F5.3 --- NH+1.8 NH index with [N/Fe]=+1.8
86- 90 F5.3 --- NH+2.0 NH index with [N/Fe]=+2.0
92- 96 F5.3 --- NH+2.2 NH index with [N/Fe]=+2.2
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Marianne Brouty [CDS] 13-Dec-2005