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J/A+A/597/A54       Srg tidal tails red giants properties         (Zhang+, 2017)

The properties of red giant stars along the Sagittarius tidal tails. Zhang X., Shi W.B., Chen Y.Q., Zhao G., Carrell K., Zhao J.K., Ruan G.P., Liang Y.C., Zhou L., Ren H.B., Zhang Y., Hou Y.H., Wang Y.F. <Astron. Astrophys. 597, A54 (2017)> =2017A&A...597A..54Z (SIMBAD/NED BibCode)
ADC_Keywords: Galaxies, nearby ; Stars, giant Keywords: stars: abundances - Galaxy: halo - Galaxy: structure Abstract: We aim to measure the metallicity distribution and velocity distribution of red giant branch (RGB) stars along the Sagittarius dwarf galaxy (Sgr) streams. Thanks to the large number of stars of the Sloan Digital Sky Survey (SDSS) sample, we can study the properties of streams as a function of the {LAMBDA}s from the Sgr core. Using the ∼22000 RGB stars from the ninth data release of SDSS, we selected 1100 RGB stars belonging to the streams of the Sgr. As compared with red horizontal branch stars (Shi et al., 2012, Cat. J/ApJ/751/130) the RGB stars constitute a large sample size and extend to a metal-poor component of [Fe/H]~-3.0dex. In particular, this RGB sample has a significant number of stars in the second wrap of the leading stream of the Sgr (leading arm 2), and thus provides a good opportunity to understand the properties of the leading stream. Description: The list of 1100 RGB stars in Sgr streams is selected from SDSS DR9 with Law & Majewski (2010ApJ...714..229L) model. For each star equatorial coordinates, [Fe/H], distance, Vgsr, Lambda, X, Y and Z are given. Each star is also marked with L1, L2, T1, T2 to show in which stream it locates. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 95 1100 Spectral parameters for 1100 RGB stars in Sgr streams
See also: J/A+A/535/A107 : 479 thick disc stars spectroscopic survey (Kordopatis+, 2011) J/ApJ/784/170 : SEGUE K giant survey. II. Distances of 6036 stars (Xue+, 2014) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 4 I4 --- Plate SDSS Plate ID number 6- 10 I5 --- MJD SDSS MJD ID number 12- 14 I3 --- Fiber SDSS Fiber ID number 16- 25 F10.5 deg RAdeg Right ascension (J2000) 27- 35 F9.5 deg DEdeg Declination (J2000) 37- 41 F5.2 [-] [Fe/H] Abundance, [Fe/H] 43- 49 F7.2 kpc Dist Distance to the Sun (1) 51- 58 F8.2 km/s VGSR Velocity in the Galactic standard of rest 60- 68 F9.5 deg Lambda Sgr longitude scale along the orbital plane 70- 76 F7.2 kpc X X-coordinate in Galactic cartesian coordinate 78- 84 F7.2 kpc Y Y-coordinate in Galactic cartesian coordinate 86- 92 F7.2 kpc Z Z-coordinate in Galactic cartesian coordinate 94- 95 A2 --- Stream Sign to show the stream that star locate (2)
Note (1): Distance is corrected by Xue et al. (2014, Cat. J/ApJ/784/170). Relative error between Kordopatis et al. (2011, Cat. J/A+A/535/A107) and Xue et al. (2014, Cat. J/ApJ/784/170) is less than 30%. Note (2): Sign to show the stream that star locate as follows: L1 = leading arm 1 L2 = leading arm 2 T1 = trailing arm 1 T2 = trailing arm 2
Acknowledgements: Weibin Shi, swb(at)
(End) Weibin-Shi [Univ. Shandong], Patricia Vannier [CDS] 20-Oct-2016
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