J/AJ/89/1897 Southern stars of high radial velocity (Stock+, 1984)
Southern stars of high radial velocity.
Stock J., MacConnell D.J., Osborn W., Alvarez H.
<Astron. J. 89, 1897 (1984)>
=1984AJ.....89.1897S 1984AJ.....89.1897S
ADC_Keywords: Stars, high-velocity ; Radial velocities
Abstract:
Slit spectra have been obtained for 82 stars for which the
objective-prism radial-velocity catalogue of Stock lists velocities
over 130km/s in magnitude. The slit spectra reveal that many of these
objects are F-K stars of low metal abundance, including some stars
apparently as metal weak as any presently known. Radial velocities
were derived from the slit spectra to examine the reliability of the
large objective-prism velocities. The slit results confirm that the
majority of the stars are indeed of high velocity, but show that the
objective-prism technique tends to produce velocities systematically
too large in magnitude by about 40km/s. It was also found that a large
objective-prism velocity that is of low weight or from spectra near a
plate edge is likely spurious. A search of the 10000 entries in
Stock's catalogue yields 205 objects with radial-velocity magnitudes
over 130km/s. Sixty-three of these velocities are not suspect because
of low weight or edge proximity. An additional 14 stars of
lower quality prism velocities were confirmed to have high velocities
from the slit spectra. The high-velocity stars appear to form two
distinct groups: metal-weak F-K stars and spectroscopically normal
main-sequence A stars. Slit spectra were obtained on six nights in
April 1978 utilizing the Boller and Chivens spectrograph and the
Carnegie image tube at the Cassegrain focus of the 1-m Yale telescope
at CTIO.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 100 83 Data for stars observed
table2.dat 68 63 Probable high-velocity stars
table3.dat 72 142 Other stars of large velocity in the
Stock Velocity Survey (SVS, 1984RMxAA...9...77S 1984RMxAA...9...77S)
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See also:
V/55 : A catalogue of high-velocity stars (Roman, 1955)
J/PASP/110/1434 : High-velocity stars radial velocities (Stock+, 1998)
J/AJ/103/514 : High-velocity stars toward South Galactic Cap (Reid+ 1992)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 2 I2 h RAh Right ascension (1950)
4- 5 I2 min RAm Right ascension (1950)
7- 11 F5.2 s RAs Right ascension (1950)
13 A1 --- DE- Declination sign (1950)
14- 15 I2 deg DEd Declination (1950)
17- 18 I2 arcmin DEm Declination (1950)
20- 23 F4.1 arcsec DEs Declination (1950)
26- 31 A6 --- SpType Stock's spectral type
33- 36 F4.1 mag pgmag Photographic magnitude
38- 41 I4 km/s OPRV Objective-prism radial velocity
43 I1 --- o_OPRV Number of objective-prism plate pair used
45- 46 I2 --- w_OPRV Total weight of the velocity determination
48- 51 I4 km/s SlitRV Slit radial velocity
53- 54 I2 km/s e_SlitRV rms uncertainty on SlitRV
56- 58 I3 --- o_SlitRV Number of measured lines which went into
the determination
60- 74 A15 --- SlitSpType Slit (MK) spectral type
77-116 A40 --- Com Identification from HD or CoD, and
comments (1)
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Note (1): Identifications from HD or CoD, and other comments.
Ten of the stars are in common with WUD, and we have given their
"microdensitometer velocities".
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Byte-by-byte Description of file: table2.dat table3.dat
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Bytes Format Units Label Explanations
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1- 2 I2 h RAh Right ascension (1950)
4- 5 I2 min RAm Right ascension (1950)
7- 8 I2 s RAs Right ascension (1950)
11 A1 --- DE- Declination sign (1950)
12- 13 I2 deg DEd Declination (1950)
15- 16 I2 arcmin DEm Declination (1950)
18- 19 I2 arcsec DEs Declination (1950)
22- 25 F4.1 mag mag Photographic Magnitude
28- 33 A6 --- SpType Spectral type
35- 38 I4 km/s OPRV Objective-prism radial velocity
41 I1 --- o_OPRV Number of objective-prism plate pair used
44- 45 I2 --- w_OPRV Total weight of the velocity determination
47- 50 I4 km/s SlitRV ? Slit radial velocities
51 A1 --- n_SlitRV [v] Note on radial velocity
56- 68 A13 --- Notes Notes (1)
72 A1 --- Note [CO] Note for stars in table 3 only:
C: Confirmed large velocities
O: Other listed large velocities
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Note (1): Notes:
C: composite spectrum
D: Pop. II giant from DDO photometry (Claria & Osborn, 1976PASP...88..463C 1976PASP...88..463C)
E: plate edge may have influenced OPRV
M: metal weak from slit spectra
P: classified "pec" by Stock (Stock & Wroblewski, 1972PDAUC...2c..59S 1972PDAUC...2c..59S)
W: microdensitometer OPRV by WUD (value in parentheses)
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Nomenclature notes:
In Table 1: <[SMO84] HHMMSS.ss-DDMMSS.s>
In Tables 2 and 3: <[SMO84] HHMMSS-DDMMSS>
History:
Prepared via OCR at CDS.
In table 1, 12 52 26.39 -34 56 28.3 = HD 112211 instead of HD 12211
(End) James Marcout, Patricia Bauer [CDS] 25-Jun-2001