J/MNRAS/419/1637 Nearby red clump stars JHK observations (Laney+, 2012)
A new Large Magellanic Cloud K-band distance from precision measurements
of nearby red clump stars.
Laney C.D., Joner M.D., Pietrzynski G.
<Mon. Not. R. Astron. Soc., 419, 1637-1641 (2012)>
=2012MNRAS.419.1637L 2012MNRAS.419.1637L
ADC_Keywords: Stars, nearby ; Photometry, infrared
Keywords: stars: variables: Cepheids - Magellanic Clouds - distance scale -
infrared: stars
Abstract:
High-precision (σmag<0.10) new JHK observations of 226 of the
brightest and nearest red clump stars in the solar neighbourhood are
used to determine distance moduli for the Large Magellanic Cloud
(LMC). The resulting K- and H-band values of 18.47±0.02 and
18.49±0.06 imply that any correction to the K-band Cepheid PL
relation due to metallicity differences between Cepheids in the LMC
and the solar neighbourhood must be quite small.
Description:
JHK observations for 226 nearby red clump stars with K magnitudes
between -0.3 and 4.9 were obtained with the 0.75-m telescope at the
South African Astronomical Observatory (SAAO), using the Mk II
infrared photometer and the same filter set used to define the SAAO
JHKL standard system.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 61 224 Magnitudes and absolute magnitudes on the 2MASS
system for nearby Hipparcos red clump stars
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See also:
I/239 : The Hipparcos and Tycho Catalogues (ESA 1997)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1 A1 --- n_HIP [*] *: Star not used in calculating mean
absolute magnitudes (see text)
2- 7 I6 --- HIP HIP (Cat. I/239) star number
9- 13 F5.3 mag Jmag Apparent 2MASS J magnitude
15- 20 F6.3 mag Hmag Apparent 2MASS H magnitude
22- 27 F6.3 mag Kmag Apparent 2MASS Ks magnitude
29- 33 F5.2 mas plx HIP parallax
35- 38 F4.2 mas e_plx rms uncertainty on plx
40- 41 I2 --- Type Number of parameters for HIP parallax fit
43- 48 F6.3 mag HMAG Absolute H magnitude
50- 55 F6.3 mag KMAG Absolute K magnitude
57- 61 F5.2 --- [M/H] ? Metallicity [M/H] on the scale of Liu et al.
(2007, Cat. J/MNRAS.382/553)
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 18-Jun-2012