J/ApJ/769/87 Kinematics of halo red giants (Carollo+, 2013)
CN anomalies in the halo system and the origin of globular clusters in
the Milky Way.
Carollo D., Martell S.L., Beers T.C., Freeman K.C.
<Astrophys. J., 769, 87 (2013)>
=2013ApJ...769...87C 2013ApJ...769...87C
ADC_Keywords: Stars, giant ; Abundances, [Fe/H] ; Radial velocities ;
Proper motions ; Stars, distances
Keywords: Galaxy: evolution; Galaxy: formation; Galaxy: halo; Galaxy: structure;
globular clusters: general; stars: abundances; surveys
Abstract:
We explore the kinematics and orbital properties of a sample of red
giants in the halo system of the Milky Way that are thought to have
formed in globular clusters based on their anomalously strong UV/blue
CN bands. The orbital parameters of the CN-strong halo stars are
compared to those of the inner- and outer-halo populations as
described by Carollo et al. (2007Natur.450.1020C 2007Natur.450.1020C,
2010ApJ...712..692C 2010ApJ...712..692C), and to the orbital parameters of globular
clusters with well-studied Galactic orbits. The CN-strong field stars
and the globular clusters both exhibit kinematics and orbital
properties similar to the inner-halo population, indicating that
stripped or destroyed globular clusters could be a significant source
of inner-halo field stars, and suggesting that both the CN-strong
stars and the majority of globular clusters are primarily associated
with this population.
Description:
We have analyzed the sample of red giant stars in the halo fields
selected by Martell et al. (2011, J/A+A/534/A136) from the
SDSS-II/SEGUE-1 (Abazajian et al. 2009, II/294; Yanny et al. 2009,
J/AJ/137/4377) and SDSS-III/SEGUE-2 (Aihara et al. 2011, II/306;
superseded by V/139; Eisenstein et al. 2011AJ....142...72E 2011AJ....142...72E;
C. M. Rockosi et al., in preparation) surveys, and determined their
kinematic and orbital parameters.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 80 1583 Parameters for the Martell et al. (2011,
J/A+A/534/A136) sample
table2.dat 91 1583 Kinematic and orbital parameters for the
Martell et al. (2011, J/A+A/534/A136) sample
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See also:
V/139 : The SDSS Photometric Catalog, Release 9 (Adelman-McCarthy+, 2012)
II/294 : The SDSS Photometric Catalog, Release 7 (Adelman-McCarthy+, 2009)
VII/202 : Globular Clusters in the Milky Way (Harris, 1997)
J/ApJ/770/16 : Segue 2 spectroscopic members (Kirby+, 2013)
J/ApJ/765/156 : CH(G) index of SDSS evolved stars (Chen+, 2013)
J/ApJ/757/164 : Oxygen abundances of dwarf stars (Ramirez+, 2012)
J/MNRAS/422/2116 : BHB and RR Lyrae towards Anticentre and NGP (Kinman+, 2012)
J/A+A/534/A136 : Halo red giants from the SEGUE survey (Martell+, 2011)
J/AJ/142/126 : CN & CH in SDSS Galactic globular clusters (Smolinski+, 2011)
J/AJ/141/90 : SEGUE stellar parameter pipeline. V. (Lee+, 2011)
J/AJ/141/89 : SEGUE stellar parameter pipeline. IV. (Smolinski+, 2011)
J/ApJ/738/79 : SDSS-DR8 BHB stars in the Milky Way's halo (Xue+, 2011)
J/ApJ/733/46 : Velocity measurements in Segue 1 (Simon+, 2011)
J/AJ/140/1119 : Radial velocities of NGC 5466 members (Shetrone+, 2010)
J/A+A/511/L10 : Abundances and space velocities of 94 stars (Nissen+, 2010)
J/ApJ/703/736 : Clump properties in the LMC 30 Dor region (Pineda+, 2009)
J/ApJ/692/1464 : Spectroscopy of Segue 1 (Geha+, 2009)
J/A+A/505/139 : Abundances of red giants in 17 GCs (Carretta+, 2009)
J/A+A/505/117 : Abundances of red giants in 15 GCs (Carretta+, 2009)
J/AJ/137/4377 : List of SEGUE plate pairs (Yanny+, 2009)
J/A+A/486/437 : CN and CH line strengths in 8 Galactic GlCl (Kayser+, 2008)
J/AJ/136/2070 : SEGUE stellar parameter pipeline. III. (Allende Prieto+, 2008)
J/AJ/136/2050 : SEGUE stellar parameter pipeline. II. (Lee+, 2008)
J/ApJ/652/1585 : Bright metal-poor stars from HES survey (Frebel+, 2006)
J/AJ/128/1177 : Galactic stellar abundances (Venn+, 2004)
J/AJ/127/1545 : Abundance ratios of 4 stars in Pal 12 (Cohen+, 2004)
http://www.sdss.org/ : SDSS home page
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 18 A18 --- Name Source name (JHHMMSS.s+DDMMSS.s)
20- 23 F4.1 kpc Dist [3/61] Distance from the Sun
25- 28 F4.1 kpc RGC [5/60] Distance from Galactic center
30- 35 F6.2 mas/yr pmRA [-30/26] Proper motion along Right Ascension
37- 40 F4.2 mas/yr e_pmRA Uncertainty in pmRA
42- 47 F6.2 mas/yr pmDE [-27/12] Proper motion along Declination
49- 52 F4.2 mas/yr e_pmDE Uncertainty in pmDE
54- 60 F7.2 km/s RVel [-506.5/407.3] Radial velocity
62- 65 F4.2 km/s e_RVel [0.7/5] Uncertainty in RVel
67- 71 F5.2 [Sun] [Fe/H] [-2.3/-0.6] Metallicity
73- 78 F6.3 --- DelS [-0.13/7.44] index δS(3839) (1)
80 I1 --- CN [0/1] CN flag; 0=normal, 1=CN strong
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Note (1): The differential index δS(3839) was calculated following
the method of Norris et al. (1981ApJ...244..205N 1981ApJ...244..205N) by fitting a
straight line to the CN-normal stars in the S(3839) versus absolute
magnitude plane, and taking the difference between the measured band
strength and that line at fixed magnitude.
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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- 18 A18 --- Name Source name (JHHMMSS.s+DDMMSS.s)
20- 26 F7.1 km/s U U velocity component in the LSR
28- 32 F5.1 km/s e_U Uncertainty in U
34- 40 F7.1 km/s V V velocity component in the LSR
42- 46 F5.1 km/s e_V Uncertainty in V
48- 54 F7.1 km/s W W velocity component in the LSR
56- 60 F5.1 km/s e_W Uncertainty in W
62- 68 F7.1 km/s Vphi Galactocentric rotational velocity Vphi
70- 74 F5.1 km/s e_Vphi Uncertainty in Vphi
76- 79 F4.1 kpc rmin [0/38]? Minimum Galactic radius during an orbit
81- 85 F5.1 kpc rmax [4/197]? Maximum Galactic radius during an orbit
87- 91 F5.1 kpc Zmax [2/192]? Maximum vertical distance achieved
during an orbit
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 12-Dec-2014