J/AJ/129/303 Abundances of stars in M3 and M13 (Cohen+, 2005)
Abundances in a large sample of stars in M3 and M13.
Cohen J.G., Melendez J.
<Astron. J., 129, 303-329 (2005)>
=2005AJ....129..303C 2005AJ....129..303C
ADC_Keywords: Clusters, globular ; Abundances ; Equivalent widths
Keywords: globular clusters: general - globular clusters: individual (M3, M13) -
stars: abundances - stars: evolution
Abstract:
We have carried out a detailed abundance analysis for 21 elements in
a sample of 27 stars with a wide range in luminosity from luminous
giants to stars near the main-sequence turnoff in the globular cluster
M13 ([Fe/H]=-1.50dex) and in a sample of 13 stars distributed from
the tip to the base of the red giant branch (RGB) in the globular
cluster M3 ([Fe/H]=-1.39dex). The analyzed spectra, obtained with
HIRES at the Keck Observatory, are of high dispersion
(R=λ/Δλ=35000).
Description:
All spectra were obtained with HIRES at the Keck Observatory. In 2001
May we observed with an instrumental configuration similar to that
used in our earlier globular cluster work. The wavelength range from
5500 to 7800Å was covered with gaps between the orders due to the
undersized HIRES detector. For the 2003 June observations (the spring
2002 run being totally lost to weather), we shifted the instrument
configuration toward the blue, covering the range 4650-7010Å,
again with small gaps between the orders.
Objects:
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RA (2000) DE Designation(s)
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13 42 11.2 +28 22 32 M3 = NGC 5272
16 41 41.4 +36 27 37 M13 = NGC 6205
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1a.dat 51 31 The sample of stars in M13
table1b.dat 51 17 The sample of stars in M3
table2a.dat 45 5083 Equivalent widths for the M3 stars
table2b.dat 45 3796 Equivalent widths for the brighter M13 stars
table2c.dat 45 2220 Equivalent widths for the fainter M13 stars
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See also:
I/278 : Catalog of stars in M3 (von Zeipel, 1908)
II/248 : UBV photometry and proper motions in M13 (Kadla, 1966)
IV/26 : Hercules Messier 13 (M13) photometry (Ludendorff, 1905)
J/A+A/290/69 : M3 photographic photometry (Buonanno+, 1994)
J/A+A/320/757 : M3 stars CCD photometry (Ferraro+ 1997)
J/AJ/113/669 : Stars in M13 core (Cohen+ 1997)
J/AJ/120/1364 : Abundances in M3 and M13 (Cavallo+, 2000)
J/AJ/122/3219 : M3 and M13 CCD BV photometry (Rey+, 2001)
J/AJ/127/1579 : Abundances of faint M13 stars (Briley+, 2004)
Byte-by-byte Description of file: table1a.dat table1b.dat
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Bytes Format Units Label Explanations
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1- 11 A11 --- Name Source name
12 A1 --- f_Name [*] Indicates a HB star
13- 17 F5.2 mag Vmag V band magnitude
19- 25 A7 "YYYY/MM" ObsDate Date of observation
27- 33 A7 "YYYY/MM" ObsDate2 Second date of observation
35- 39 I5 s ExpTime Exposure time
41 A1 --- l_S/N [>] Limit flag on S/N
42- 44 I3 --- S/N Signal to noise ratio
46- 51 F6.1 km/s RV ? Radial velocity
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Byte-by-byte Description of file: table2a.dat table2b.dat table2c.dat
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Bytes Format Units Label Explanations
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1- 11 A11 --- Name Source name
13- 16 A4 --- Ion Ion
18- 24 F7.2 0.1nm lambda Wavelength in Angstroms
26- 29 F4.2 eV EP Excitation potential
31- 36 F6.2 --- log(gf) Log of the oscillator strength
38- 39 A2 --- l_EW [≤ ] Flag on EW
41- 45 F5.1 10-13m EW ? Equivalent width
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Marianne Brouty [CDS] 17-Jan-2006