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 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 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:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 95 1100 Spectral parameters for 1100 RGB stars in Sgr
streams
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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
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Bytes Format Units Label Explanations
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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)
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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
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Acknowledgements:
Weibin Shi, swb(at)nao.cas.cn
(End) Weibin-Shi [Univ. Shandong], Patricia Vannier [CDS] 20-Oct-2016