J/ApJ/670/346 M giant stars in the Sagittarius dwarf galaxy. V. (Chou+, 2007)
A 2MASS all-sky view of the Sagittarius dwarf galaxy.
V. Variation of the metallicity distribution function along the Sagittarius
stream.
Chou M.-Y., Majewski S.R., Cunha K., Smith V.V., Patterson R.J.,
Martinez-Delgado D., Law D.R., Crane J.D., Munoz R.R., Garcia Lopez R.,
Geisler D., Skrutskie M.F.
<Astrophys. J., 670, 346-362 (2007)>
=2007ApJ...670..346C 2007ApJ...670..346C
ADC_Keywords: Stars, giant ; Stars, M-type ; Spectroscopy ; Equivalent widths
Keywords: galaxies: evolution - galaxies: interactions - Galaxy: halo -
Local Group
Abstract:
We present reliable measurements of the metallicity distribution
function (MDF) at different points along the tidal stream of the
Sagittarius (Sgr) dwarf spheroidal (dSph) galaxy, based on
high-resolution, echelle spectroscopy of candidate M giant members of
the Sgr system.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 113 59 The program stars
table3.dat 80 66 FeI equivalent-width measurements
table7.dat 46 59 Derived stellar parameters for the program stars
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See also:
J/AJ/128/245 : M giant stars in the Sagittarius dwarf galaxy (Majewski+, 2004)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1 I1 --- Sam [1/5] Sample (G1)
3- 17 A15 --- Star Star ID (HHMMSSs+DDMMSS)
18- 26 F9.5 deg RAdeg Right ascension in decimal degrees (J2000)
28- 36 F9.5 deg DEdeg Declination in decimal degrees (J2000)
38- 46 F9.5 deg GLon Galactic longitude
48- 56 F9.5 deg GLat Galactic latitude
58- 63 F6.3 mag Ksmag0 Deredenned Ks magnitude
65- 68 F4.2 mag (J-Ks)0 Deredenned J-Ks colour index
70- 78 F9.5 deg SgrLon Sgr orbital plane longitude
80- 85 F6.1 km/s VGSRo Old Galactic standard of rest velocity
86 A1 --- --- [/]
87- 92 F6.1 km/s VGSR ? New Galactic standard of rest velocity
94- 98 A5 --- Spect Spectrograph name
100-109 A10 "YYYY/MM/DD" Date Observation UT date
111-113 I3 --- S/N Signal-to-noise ratio
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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 I1 --- Sam [1/6] Sample (G1)
3- 17 A15 --- Star Star ID or reference star name
19- 23 F5.1 0.1nm EW1 ?=- FeI 7443.018Å equivalent width
25- 28 F4.1 0.1nm EW2 ?=- FeI 7447.384Å equivalent width
30- 34 F5.1 0.1nm EW3 ?=- FeI 7461.521Å equivalent width
36- 39 F4.1 0.1nm EW4 ?=- FeI 7498.530Å equivalent width
41- 45 F5.1 0.1nm EW5 ?=- FeI 7507.261Å equivalent width
47- 51 F5.1 0.1nm EW6 ?=- FeI 7511.015Å equivalent width
53- 57 F5.1 0.1nm EW7 ?=- FeI 7531.141Å equivalent width
59- 63 F5.1 0.1nm EW8 ?=- FeI 7540.430Å equivalent width
65- 68 F4.1 0.1nm EW9 ?=- FeI 7547.910Å equivalent width
70- 74 F5.1 0.1nm EW10 ?=- FeI 7568.894Å equivalent width
76- 80 F5.1 0.1nm EW11 ?=- FeI 7583.787Å equivalent width
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Byte-by-byte Description of file: table7.dat
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Bytes Format Units Label Explanations
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1 I1 --- Sam [1/6] Sample (G1)
3- 17 A15 --- Star Star ID
19- 22 I4 K Teff Effective temperature
24- 27 F4.2 [cm/s2] logg Surface gravity
28- 30 A3 --- n_logg Note on logg (1)
32- 35 F4.2 km/s ksi Microturbulent velocity
37- 41 F5.2 [Sun] [Fe/H] Metallicity
43- 46 F4.2 --- Std Standard deviation in the line abundance
determination
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Note (1): "0.0(-)" means that our iterative procedure was converging on a
model atmosphere with logg<0, whereas the Kurucz (1994, CD-ROM 19)
model atmosphere grids do not go below logg=0. In these cases, we have
adopted the logg=0 atmosphere.
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Global notes:
Note (G1): Samples as follows:
1 = Sgr Core
2 = Sgr North Leading Arm--Best Subsample
3 = Sgr North Leading Arm--Less Certain Subsample
4 = Sgr South Leading Arm
5 = NGC Group
6 = Calibration Stars
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History:
From electronic version of the journal
References:
Majewski et al., Paper I 2003ApJ...599.1082M 2003ApJ...599.1082M
Majewski et al., Paper II 2004AJ....128..245M 2004AJ....128..245M, Cat. J/AJ/128/245
Johnson et al., Paper III 2005ApJ...619..800J 2005ApJ...619..800J
Law et al., Paper IV 2005ApJ...619..807L 2005ApJ...619..807L
Chou et al., Paper VI 2010ApJ...708.1290C 2010ApJ...708.1290C, Cat. J/ApJ/708/1290
Frinchaboy et al., Paper VII 2012ApJ...756...74F 2012ApJ...756...74F, Cat. J/ApJ/756/74
(End) Patricia Vannier [CDS] 27-Jan-2010