J/AJ/135/1551 Abundances of stars in 47 Tuc (Koch+, 2008)
A new abundance scale for the globular cluster 47 Tuc.
Koch A., McWilliam A.
<Astron. J., 135, 1551-1566 (2008)>
=2008AJ....135.1551K 2008AJ....135.1551K
ADC_Keywords: Clusters, globular ; Stars, giant ; Abundances
Keywords: globular clusters: individual (47 Tuc) - stars: abundances -
stars: atmospheres - stars: individual (Arcturus)
Abstract:
We present chemical abundances for O, Na, Mg, Al, Si, Ca, Ti, and Fe
in eight red giants and one turnoff star in the metal-rich globular
cluster 47 Tuc, based on spectroscopy with the Magellan Inamori
Kyocera Echelle high-resolution spectrograph on the Magellan 6.5m
Clay telescope. A robust line by a line differential abundance
analysis technique, relative to the K-giant Arcturus, was used to
reduce systematic errors from atmospheric and atomic parameters.
Description:
Observations were carried out over four nights in 2003 July using the
Magellan Inamori Kyocera Echelle (MIKE) spectrograph at the 6.5m
Magellan2/Clay Telescope.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table2.dat 66 11 Properties of the target stars
table3.dat 88 214 Linelist used for the red giant sample
table4.dat 37 175 Linelist used for the turnoff star
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 9 A9 --- Star Star name
11- 12 I2 h RAh Right ascension (J2000.0)
14- 15 I2 min RAm Right ascension (J2000.0)
17- 20 F4.1 s RAs Right ascension (J2000.0)
22 A1 --- DE- Declination sign (J2000.0)
23- 24 I2 deg DEd Declination (J2000.0)
26- 27 I2 arcmin DEm Declination (J2000.0)
29- 32 F4.1 arcsec DEs Declination (J2000.0)
34- 38 F5.2 mag Vmag V magnitude (Johnson)
40- 43 F4.2 mag V-I V-I colour index (Johnson-Cousins)
45- 48 F4.2 mag J-K ?=- J-K colour index
50- 53 F4.2 mag V-K ?=- V-K colour index
55- 59 F5.1 km/s RV Radial velocity
61- 64 F4.2 km/s e_RV rms uncertainty on RV
66 A1 --- Note [*] For Arcturus, all data from Simbad
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table3.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 5 A5 --- Ion Ion designation
7- 13 F7.2 0.1nm Wave Wavelength in Angstroms
15- 18 F4.2 eV ExPot Excitation potential
20- 25 F6.2 10-13m Arcturus ? Arcturus equivalent width in milliAngstroms
27- 32 F6.2 10-13m Sun ? Sun equivalent width in milliAngstroms
34- 39 F6.2 10-13m 47Tuc1 ? 47 Tuc #1 (Cl* NGC 104 KM 1) equivalent width
in milliAngstroms
41- 46 F6.2 10-13m 47Tuc2 ? 47 Tuc #2 (Cl* NGC 104 KM 2) equivalent width
in milliAngstroms
48- 53 F6.2 10-13m 47Tuc3 ? 47 Tuc #3 (Cl* NGC 104 KM 3) equivalent width
in milliAngstroms
55- 60 F6.2 10-13m 47Tuc4 ? 47 Tuc #4 (Cl* NGC 104 KM 4) equivalent width
in milliAngstroms
62- 67 F6.2 10-13m 47Tuc5 ? 47 Tuc #5 (Cl* NGC 104 KM 5) equivalent width
in milliAngstroms
69- 74 F6.2 10-13m 47Tuc6 ? 47 Tuc #6 (Cl* NGC 104 KM 6) equivalent width
in milliAngstroms
76- 81 F6.2 10-13m 47Tuc7 ? 47 Tuc #7 (Cl* NGC 104 KM 7) equivalent width
in milliAngstroms
83- 88 F6.2 10-13m 47Tuc8 ? 47 Tuc #8 (Cl* NGC 104 KM 8) equivalent width
in milliAngstroms
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table4.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 5 A5 --- Ion Ion designation
7- 13 F7.2 0.1nm Wave Wavelength in Angstroms
15- 18 F4.2 eV ExPot Excitation potential
20- 24 F5.2 10-13m HIP Hipparcos 66815 equivalent width
in milliAngstroms
26- 31 F6.2 10-13m Sun ? Sun equivalent width in milliAngstroms
33- 37 F5.2 10-13m TO2 ? Turnoff #2 (Cl* NGC 104 TO 2) equivalent width
in milliAngstroms
--------------------------------------------------------------------------------
History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 20-Oct-2010