J/other/RAA/17.62 Candidate members of 4 stellar streams (Li+, 2017)
Candidate members of the Pal 5, GD-1, Cetus Polar and Orphan tidal stellar halo
streams from SDSS DR9, LAMOST DR3 and APOGEE catalogs.
Li G.-W., Yanny B., Zhang H.-T., Bai Z.-R., Wu Y., Dong Y.-Q., Lei Y.-J.,
Yuan H.-L., Hou Y.-H., Wang Y.-F., Zhang Y.
<Res. Astron. Astrophys., 17, 62 (2017)>
=2017RAA....17...62L 2017RAA....17...62L (SIMBAD/NED BibCode)
ADC_Keywords: Milky Way ; Morphology ; Radial velocities ;
Effective temperatures
Keywords: Galaxy: structure general: stream -
Galaxy: structure individual (GD-1, Orphan, Cetus, Pal 5)
Abstract:
We present candidate members of the Pal 5, GD-1, Cetus Polar and
Orphan tidal stellar streams found in LAMOST DR3, SDSS DR9 and APOGEE
catalogs. In LAMOST DR3, we find 20, 4 and 24 high confidence
candidates of tidal streams GD-1, Cetus Polar and Orphan respectively.
We also list 59, 118 and 10 high confidence candidates of tidal
streams Cetus Polar, Orphan and Pal 5, respectively from the SDSS DR9
spectroscopic catalog. Furthermore, we find seven high confidence
candidates of the Pal 5 tidal stream in the APOGEE data. Compared with
SDSS, the new candidates from LAMOST DR3 are brighter, so that
together, more of the color-magnitude diagram, including the giant
branch, can be explored. Analysis of the SDSS data shows that there
are three metallicity peaks associated with the Orphan stream which
also exhibit some spatial separation. The LAMOST data confirm multiple
metallicities in this stream. The metallicity, given by the higher
resolution APOGEE instrument, of the Pal 5 tidal stream is
[Fe/H]~-1.2, higher than that given earlier by SDSS spectra. Many
previously unidentified stream members are tabulated here for the
first time, along with existing members, allowing future researchers
to further constrain the orbits of these objects as they move within
the Galaxy's dark matter potential.
Description:
We search for stream members, primarily giants (0<logg<3.5), in the
LAMOST DR3, SDSS DR9 and APOGEE spectral databases.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 96 48 Candidates in LAMOST
table2.dat 110 187 Candidates in SDSS
table3.dat 94 7 Candidates in APOGEE
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See also:
V/139 : SDSS Photometric Catalog, Release 9 (Adelman-McCarthy+, 2012)
V/149 : LAMOST DR2 catalogs (Luo+, 2016)
J/ApJ/776/26 : RRab stars in the Orphan stream distances (Sesar+, 2013)
J/ApJ/819/1 : Wide-field photometry of the GC Palomar 5 (Ibata+, 2016)
J/ApJ/823/157 : LOS velocities + [Fe/H] of Pal 5 tidal stream (Ishigaki+, 2016)
http://dr3.lamost.org : LAMOST DR3 Home Page
http://www.sdss3.org/surveys/apogee.php : APOGEE Home Page
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 6 A6 --- Stream Stream designation
8- 16 I9 --- ObsID LAMOST ObsID (1)
18- 19 A2 --- Subclass Spectral type
21- 32 F12.8 deg RAdeg Right ascension (J2000)
34- 44 F11.8 deg DEdeg Declination (J2000)
46- 52 F7.2 km/s HRV Heliocentric radial velocity
54- 60 F7.2 K Teff Effective temperature
62- 66 F5.2 [-] [Fe/H] Metallicity
68- 71 F4.2 [cm/s2] logg Surface gravity
73- 77 F5.2 km/s e_HRV rms uncertainty on HRV
79- 84 F6.2 K e_Teff rms uncertainty on Teff
86- 89 F4.2 [-] e_[Fe/H] rms uncertainty on [Fe/H]
91- 94 F4.2 [cm/s2] e_logg rms uncertainty on logg
96 I1 --- Level [1/3] Confidence level:
1 represents highest confidence
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Note (1): the same object in different observation has different obsid which
is unique for all LAMOST spectra.
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 6 A6 --- Stream Stream designation
8- 11 I4 --- Plate SDSS plate number
13- 17 I5 d MJD SDSS MJD number
19- 21 I3 --- Fiber SDSS Fiber number
23- 25 A3 --- Subclass Spectral type
27- 36 F10.6 deg RAdeg Right ascension (J2000)
38- 47 F10.6 deg DEdeg Declination (J2000)
49- 55 F7.2 km/s HRV Heliocentric radial velocity
57- 63 F7.2 K Teff Effective temperature
65- 69 F5.2 [-] [Fe/H] Metallicity
71- 75 F5.2 [-] [Fe/H]wbg ?=- WBG Metallicity (1)
77- 80 F4.2 [cm/s2] logg Surface gravity
82- 86 F5.2 km/s e_HRV rms uncertainty on HRV
88- 93 F6.2 K e_Teff rms uncertainty on Teff
95- 98 F4.2 [-] e_[Fe/H] rms uncertainty on [Fe/H]
100-103 F4.2 [-] e_[Fe/H]wbg ?=- rms uncertainty on [Fe/H]wbg
105-108 F4.2 [cm/s2] e_logg rms uncertainty on logg
110 I1 --- Level [1/3] Confidence level:
1 represents highest confidence
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Note (1): Newberg et al. (2009ApJ...700L..61N 2009ApJ...700L..61N) found the quoted FEHWBG
(Wilhelm et al., 1999, Cat. J/AJ/117/2308) (WBG) parameter is a better
measure of metallicity than FEHADOP for blue horizontal branch (BHB) stars,
so we use WBG metallicity for stars with (g-r)0≤0.2 and
FEHADOP (adopted) metallicity for stars with (g-r)0≥0.2.
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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- 5 A5 --- Stream Stream designation
7- 24 A18 --- 2MASS 2MASS name (2MHHMMSSss+DDMMSSs)
26- 35 F10.6 deg RAdeg Right ascension (J2000)
37- 45 F9.6 deg DEdeg Declination (J2000)
47- 52 F6.2 km/s HRV Heliocentric radial velocity
54- 60 F7.2 K Teff ? Effective temperature
62- 66 F5.2 [-] [Fe/H] ? Metallicity
68- 71 F4.2 [cm/s2] logg ? Surface gravity
73- 76 F4.2 km/s e_HRV rms uncertainty on HRV
78- 82 F5.2 K e_Teff ? rms uncertainty on Teff
84- 87 F4.2 [-] e_[Fe/H] ? rms uncertainty on [Fe/H]
89- 92 F4.2 [cm/s2] e_logg ? rms uncertainty on logg
94 I1 --- Level [1] Confidence level:
1 represents highest confidence
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 25-Aug-2017