J/AJ/137/3198 New samples of BHB stars in the Milky Way (Kinman+, 2009)
Do the nearby blue horizontal branch stars belong to the thick disk or the halo?
Kinman T.D., Morrison H.L., Brown W.R.
<Astron. J., 137, 3198-3209 (2009)>
=2009AJ....137.3198K 2009AJ....137.3198K
ADC_Keywords: Stars, nearby ; Stars, horizontal branch ; Space velocities
Keywords: Galaxy: halo - Galaxy: structure - stars: horizontal-branch
Abstract:
We study the Milky Way region (|Z|<3.0kpc) where the thick disk and
inner halo overlap by using the kinematics of local blue horizontal
branch (BHB) stars (within 1kpc) and new samples of BHB stars and
A-type stars from the Century Survey. We derive Galactic U, V, and W
velocities for these BHB and A-type star samples using proper motions
from the NOMAD catalog.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 95 27 Data for BHB stars within 1kpc (Sample LBHB)
table3.dat 95 132 Data for Century Survey stars
(Samples CBHB and CA)
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See also:
J/AJ/126/1362 : Century Survey Galactic Halo Project. I. (Brown+, 2003)
J/AJ/130/1097 : BHB stars in Century Survey Galactic Halo Project (Brown+ 2005)
J/AJ/135/564 : Photometry and spectroscopy of BHB candidates (Brown+, 2008)
Byte-by-byte Description of file: table2.dat table3.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- Name Name (HD/BD in table2, CHSS in table3)
11 A1 --- n_Name [*] indicates star selected by its color alone;
blank if selected by color from proper motion
(limited sample)
13- 16 I4 km/s Ulsr U velocity (LSR)
18- 20 I3 km/s e_Ulsr rms uncertainty on Ulsr
22- 25 I4 km/s Vlsr V velocity (LSR)
27- 28 I2 km/s e_Vlsr rms uncertainty on Vlsr
30- 33 I4 km/s Wlsr W velocity (LSR)
35- 36 I2 km/s e_Wlsr rms uncertainty on Wlsr
38- 40 I3 km/s Tlsr Total space velocity (in LSR)
42- 44 I3 km/s e_Tlsr rms uncertainty on Tlsr
46- 50 F5.2 [Sun] [Fe/H] Metallicity
52- 55 F4.2 kpc |Z| Height of star above the Galactic plane
57- 60 F4.2 kpc D Distance of the star
62- 65 F4.2 --- Pthin Probability that the star belongs to the
thin disk population
67- 70 F4.2 --- e_Pthin rms uncertainty on Pthin
72- 75 F4.2 --- Pthic Probability that the star belongs to the
thick disk population
77- 80 F4.2 --- e_Pthic rms uncertainty on Pthic
82- 85 F4.2 --- Phalo Probability that the star belongs to the halo
87- 90 F4.2 --- e_Phalo rms uncertainty on Phalo
92- 95 A4 --- Sample Sample: LBHB, CBHB or CA (1)
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Note (1): Sample as follows:
LBHB = local blue horizontal branch stars (within 1kpc)
CBHB = blue horizontal branch stars from the Century Survey
CA = A-type stars from the Century Survey
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 03-Sep-2011