J/MNRAS/339/701 Velocities and BR photometry in LMC (Zhao+, 2003)
Kinematic outliers in the Large Magellanic Cloud:
constraints on star-star microlensing.
Zhao H., Ibata R.A., Lewis G.F., Irwin M.J.
<Mon. Not. R. Astron. Soc. 339, 701 (2003)>
=2003MNRAS.339..701Z 2003MNRAS.339..701Z
ADC_Keywords: Magellanic Clouds ; Radial velocities ; Photometry, UBVRI
Keywords: gravitational lensing - galaxies: haloes -
galaxies: kinematics and dynamics - Magellanic Clouds - dark matter
Abstract:
We present the results of a large spectroscopic survey of the LMC,
consisting of more than 1300 radial velocities measured accurately
with the 2dF instrument during three observing compaigns 1999-2002. In
this sample, no evidence is found for any extraneous, kinematically
distinct population over the expected LMC and Galactic components. We
discuss the significance of this finding for the LMC self-lensing
models. The sample was randomly selected from three APM photographic
plates with 16≤R≤18mag and -1.0≤Bj-R≤2.5mag. The fields were
centered on previous microlensing events. The 1200V grating was used
with 1.1Å per pixel resolution over 4625-5765Å. The zero point
of the velocity of LMC K-type stars is set by cross-correlating with a
K-type standard star. For sample stars of other spectral type we
assume no systematic change of the peak of velocity distribution with
spectral type.
Description:
Kinematics and photometry of 1347 stars in the LMC are given.
For each star, the RA and DEC, the heliocentric radial velocity,
the R magnitude and Bj-R color are given.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
vhlmc.dat 47 1347 Kinematics and photometry for 1347 LMC stars
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Byte-by-byte Description of file: vhlmc.dat
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Bytes Format Units Label Explanations
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2- 5 I4 --- Seq [1/1347] Star identification number
7- 8 I2 h RAh Right ascension (J2000.0)
10- 11 I2 min RAm Right ascension (J2000.0)
13- 16 F4.1 s RAs Right ascension (J2000.0)
18 A1 --- DE- Declination sign (J2000.0)
19- 20 I2 deg DEd Declination (J2000.0)
22- 23 I2 arcmin DEm Declination (J2000.0)
25- 26 I2 arcsec DEs Declination (J2000.0)
28- 33 F6.2 km/s HRV Heliocentric radial velocity (1)
35- 40 F6.2 mag Rmag R photographic magnitude
42- 47 F6.2 mag Bj-R Bj-R color index
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Note (1): Typical velocity errors are 15km/s. We list only stars with
uncertainty <50km/s and Tory-Davis cross-correlation parameter R>5.
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Acknowledgements: HongSheng Zhao
(End) HongSheng Zhao [IoA, Cambridge, UK], Patricia Bauer [CDS] 28-Jul-2003