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J/other/RAA/17.76      K giant stars along Sagittarius streams      (Ren+, 2017)

The metallicity of K giant stars along the Sagittarius streams. Ren H.-B., Shi W.-B., Zhang X., Tang Y.-K., Zhang Y., Hou Y.-H., Wang Y.-F. <Res. Astron. Astrophys., 17, 76 (2017)> =2017RAA....17...76R (SIMBAD/NED BibCode)
ADC_Keywords: Milky Way ; Stars, giant ; Stars, K-type ; Stars, distances Keywords: Galaxy: halo - galaxies: individual (Sagittarius) - stars: K giant-branch Abstract: The Large Sky-Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) Data Release 3 provided 341 691 K giant stars with stellar parameters. Based on the models of Law & Majewski (2010ApJ...714..229L), we identified 252 K giant stars in the leading stream associated with the Sagittarius (Sgr) dwarf galaxy. We obtained 132 K giant stars belonging to the trailing arm of Sgr using the model of Belokurov et al. We studied the metallicity distribution of member stars along the streams and found a flat gradient in the first wrap of the leading stream, -(0.88±0.3)x10-3dex/deg in the second wrap of the leading stream and -(1.2±0.3)x10-3dex/deg in the first wrap of the trailing stream. Moreover, we obtained a combined metallicity gradient with our sample and data from the literature. We also analyzed the properties of an overdensity, which is located in the leading stream of the Sgr. Description: Law & Majewski (2010ApJ...714..229L) provided a Sgr model that has 105 points with angular position, distance and radial velocity. By using the model of Law & Majewski (2010ApJ...714..229L), we selected K giant samples belonging to the leading Sgr stream. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 84 384 List of 384 K giant stars in Sgr streams
See also: V/149 : LAMOST DR2 catalogs (Luo+, 2016) J/ApJ/805/189 : Highly likely members of the Sgr stream (Hyde+, 2015) http://dr3.lamost.org : LAMOST DR3 Home Page Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 14 A14 --- Name LAMOST lmjd-spid-fiber designation 16- 22 F7.3 deg RAdeg Right ascension (J2000) 24- 30 F7.3 deg DEdeg Declination (J2000) 32- 37 F6.3 [-] [Fe/H] Metallicity 39- 44 F6.3 kpc Dist Distance, derived by a Bayesian method (Liu et al., 2014ApJ...790..110L) 46- 53 F8.3 km/s Vgsr Galactic Standard of Rest velocity 55- 61 F7.3 deg Lambda Sgr longitude scale along the orbital plane, Λ 63- 67 F5.2 kpc XGC Galactocentric X coordinate 69- 74 F6.2 kpc YGC Galactocentric Y coordinate 76- 81 F6.2 kpc ZGC Galactocentric Z coordinate 83- 84 A2 --- Mark Arm code (1)
Note (1): Arm code as follows: L1 = mean leading arm 1 L2 = leading arm 2 T1 = trailing arm 1
History: From electronic version of the journal
(End) Patricia Vannier [CDS] 25-Aug-2017
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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