J/AJ/126/762 Positions and space velocities for 2615 SGP stars (Chen+, 2003)
Dark matter: local volume density versus total surface density.
Chen A.B.-C., Lu P.K., Mendez R.A., van Altena W.F.
<Astron. J. 126, 762 (2003)>
=2003AJ....126..762C 2003AJ....126..762C
ADC_Keywords: Radial velocities ; Proper motions ; Space velocities ; Photometry
Keywords: dust, extinction - Galaxy: disk - Galaxy: fundamental parameters -
Galaxy: structure - methods: statistical
Abstract:
Spectrophotometric data have been obtained with the 2dF spectrograph
at Cerro Tololo Inter-American Observatory and with Hydra at the WIYN
telescope for nearly 2000 A, F, and G stars toward the south Galactic
pole. Using 1305 radial velocities, 2311 uvbyHβ photometric
measurements, and 1621 Yale-San Juan SPM (Southern Proper Motion)
absolute proper motions, peculiar velocities were derived to determine
the galactic gravitational force K(z) perpendicular to the Galactic
plane, first described by Oort (published in 1932).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 185 2615 Spectrophotometric, astrometric, kinematic, and
astrometric Data for 2615 SGP Stars
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See also:
I/129 : Parallaxes and Proper Motions near SGP (Murray+ 1986)
I/277 : SPM Catalog 2.0 (Platais+ 1998)
III/172 : Radial Velocities from Objective Prism Plates (Stock 1992)
J/ApJS/83/203 : Catalog of faint A, F and G stars at SGP (Lu+, 1992)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 8 I08 --- ID Identification of the star and field (1)
9 A1 --- m_ID Binary component
11 I1 h RAh Hour of right ascension (J2000)
13- 14 I2 min RAm Minute of right ascension (J2000)
16- 19 F4.1 s RAs Second of right ascension (J2000)
20 A1 --- f_RAs [c:] Flag on RAs (2)
22 A1 --- DE- Sign of the declination (J2000)
23- 24 I2 deg DEd Degree of declination (J2000)
26- 27 I2 arcmin DEm Arcminute of declination (J2000)
29- 30 I2 arcsec DEs Arcsecond of declination (J2000)
32 A1 --- u_SpType [:] Indicates either spectrum or luminosity or
both are uncertain
33- 39 A7 --- SpType The MK spectral type
41- 45 F5.1 km/s RV ? Radial velocity from 2DF or Hydra
47 I1 --- o_RV ? Number of spectra in RV
49 I1 --- xW ? The cross-correlation weight (3)
51 A1 --- f_ymag [bns:] Flag on ymag (4)
53- 58 F6.3 mag ymag The Stroemgren y magnitude
60- 65 F6.3 mag b-y The Stroemgren (b-y) color
67- 72 F6.3 mag m1mag ? The Stroemgren m1 color
74- 79 F6.3 mag c1mag ? The Stroemgren c1 color
81- 85 F5.3 mag Hbmag ? The Stroemgren Hβ magnitude
87- 88 I2 --- o_ymag ? Numbers of photometry observations (5)
90- 94 F5.1 mas/yr pmRA ? Proper motion in right ascension (6)
96-101 F6.1 mas/yr pmDE ? Proper motion in declination (6)
103-109 F7.1 pc SDis ? Spectroscopic distance
111-117 F7.1 pc PDis Photometric distance
119-124 F6.1 km/s Uvel ? Space velocity towards the Galactic anticenter
126-132 F7.1 km/s Vvel ? Space velocity the direction of Galactic
rotation
134-139 F6.1 km/s Wvel ? Space velocity toward the north Galactic pole
141-144 F4.1 mag SpMag ? Absolute Magnitude derived from spectra
146-149 F4.1 mag PhMag ? Absolute Magnitude derived from photometry
151-158 I8 --- SPM ? Yale Southern Proper Motion number (I/277)
160-168 A9 --- GSC ? Guide Star Catalog number (I/254)
170-174 A5 --- Name Other name (7)
175 A1 --- f_Name [bc] Flag on Name (7)
177-182 I6 --- SAO ? The SAO or Bok & Basinski 1964 number (8)
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Note (1): the ID number is made of XXXYYNNN:
- 3 digits giving the field pixel number in decreasing right ascension
- 2 digits giving the field pixel number in increasing declination
- 3 digits giving the serial number in the field
Objects identified as [CLM2003b] XXXYYNNNA in Simbad
Note (2): Note on right ascension:
c = Coordinates are comparable or adopted from the GSC positions
: = Coordinates are uncertain
Note (3): Early stars generally have lower weight than late-type stars.
Velocity adopted from other sources if cw=0.
Note (4): Note on ymag:
s = ymag and b-y are comparable to SPM's V and B-V (with
consideration of the shift in magnitude and color)
b = Image is near a bad pixel or column
n = Image near edge or corner of the CCD frame
: = Measures are uncertain in either magnitude or color. This
includes peculiar color or possible contamination of faint
nearby star in ASCAP diaphragm.
Note (5): Stars used as standards generally have np>6.
Note (6): Adopted from Yale Southern Proper Motion (SPM).
Note (7): Note on Name:
NNNN: HD number
NNc: Corbally & Garrison 1988AJ.....95..739C 1988AJ.....95..739C, CGG* SGP NN, number
NNNNb: Bok & Basinski 1964MmMtS..16....0B 1964MmMtS..16....0B number
Flag on Name:
b = Bok & Basinski, 1964MmMtS..16....0B 1964MmMtS..16....0B number
c = Corbally & Garrison, 1988AJ.....95..739C 1988AJ.....95..739C, CGG* SGP NN, number
Note (8): Note on Name2:
N, NN or NNN: Corbally & Garrison 1988AJ.....95..739C 1988AJ.....95..739C, CGG* SGP NNN, number
NNNN: Bok and Basinski 1964MmMtS..16....0B 1964MmMtS..16....0B, the first digit is
field number (0-4)
NNNNNN: SAO (I/131) number
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Bauer [CDS] 26-Sep-2003