J/MNRAS/386/313 IR observations of Mira variables (Whitelock+, 2008)
AGB variables and the Mira period-luminosity relation.
Whitelock P.A., Feast M.W., Van Leeuwen F.
<Mon. Not. R. Astron. Soc., 386, 313-323 (2008)>
=2008MNRAS.386..313W 2008MNRAS.386..313W
ADC_Keywords: Magellanic Clouds ; Stars, variable ; Photometry, infrared
Keywords: stars: AGB and post-AGB - stars: carbon - stars: oscillations -
stars: variables: other
Abstract:
Published data for large-amplitude asymptotic giant branch variables
in the Large Magellanic Cloud (LMC) are re-analysed to establish the
constants for an infrared (K) period-luminosity relation of the form
MK=ρ[logP-2.38]+δ. A slope of ρ=-3.51±0.20 and a
zero-point of δ=-7.15±0.06 are found for oxygen-rich Miras (if a
distance modulus of 18.39±0.05 is used for the LMC). Assuming this
slope is applicable to Galactic Miras we discuss the zero-point for
these stars using the revised Hipparcos parallaxes together with
published very long baseline interferometry (VLBI) parallaxes for OH
masers and Miras in globular clusters. These result in a mean
zero-point of δ=-7.25±0.07 for O-rich Galactic Miras. The
zero-point for Miras in the Galactic bulge is not significantly
different from this value.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
stars.dat 54 10 Stars with new IR photometry from SAAO in tablea1
tablea1.dat 41 136 New IR photometry from SAAO
tablea3.dat 50 239 IR and other data for variable stars
--------------------------------------------------------------------------------
See also:
J/ApJ/660/1486 : Variability of LMC semiregular variables (Soszynski+, 2007)
Byte-by-byte Description of file: stars.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 6 A6 --- Name Simbad name
9- 10 I2 h RAh Simbad Hour of Right Ascension (J2000.0)
12- 13 I2 min RAm Simbad Minute of Right Ascension (J2000.0)
15- 18 F4.1 s RAs Simbad Second of Right Ascension (J2000.0)
20 A1 --- DE- Simbad Sign of the Declination (J2000.0)
21- 22 I2 deg DEd Simbad Degree of Declination (J2000.0)
24- 25 I2 arcmin DEm Simbad Arcminute of Declination (J2000.0)
27- 28 I2 arcsec DEs Simbad Arcsecond of Declination (J2000.0)
30- 34 F5.2 mag Bmag ? Simbad B band magnitude
36- 40 F5.2 mag Vmag Simbad V band magnitude
42- 47 A6 --- SpType Simbad MK spectral type
49- 54 F6.2 d Per Period (from GCVS, Cat. B/gcvs)
--------------------------------------------------------------------------------
Byte-by-byte Description of file: tablea1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 6 A6 --- Name Star name
8- 17 F10.2 d JD Julian date
20- 23 F4.2 mag Jmag J magnitude
26- 29 F4.2 mag Hmag H magnitude
32- 35 F4.2 mag Kmag K magnitude
37- 41 F5.2 mag Lmag L magnitude
--------------------------------------------------------------------------------
Byte-by-byte Description of file: tablea3.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1 A1 --- El [OC] O- or C-rich variable
4- 11 A8 --- Name GCVS variable star name
13- 18 I6 --- HIP HIP number
20- 21 A2 --- Vtype Variability type (1)
23- 25 I3 d Per Period
27- 30 F4.2 mag DHp Ppeak-to-peak amplitude of the variations in
the Hipparcos magnitude
32- 36 F5.2 mag Kmag Mean K magnitude
38- 40 I3 --- o_Kmag Number of observations used to derive Kmag
42- 45 F4.2 mag AV Interstellar extinction in V band
47- 50 F4.2 kpc Dist ? Heliocentric distance
--------------------------------------------------------------------------------
Note (1): Variability type as follows:
M = Mira
SR = Semi-regular variable
L = Slow irregular
LB = Slow irregular
--------------------------------------------------------------------------------
Acknowledgements:
Patricia Whitelock, paw(at)saao.ac.za
References:
Whitelock & Feast, Paper I 2000MNRAS.319..759W 2000MNRAS.319..759W
(End) Patricia Vannier [CDS] 30-Dec-2009