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J/ApJ/620/961     Diameters of Mira stars in JHK' bands    (Millan-Gabet+, 2005)

Diameters of Mira stars measured simultaneously in the J, H, and K' near-infrared bands. Millan-Gabet R., Pedretti E., Monnier J.D., Schloerb F.P., Traub W.A., Carleton N.P., Lacasse M.G., Segransan D. <Astrophys. J., 620, 961-969 (2005)> =2005ApJ...620..961M
ADC_Keywords: Stars, variable ; Stars, diameters ; Photometry, infrared Keywords: instrumentation: interferometers - stars: atmospheres - stars: fundamental parameters - stars: variables: other - techniques: high angular resolution Abstract: We present the first spatially resolved observations of a sample of 23 Mira stars simultaneously measured in the near-infrared J, H, and K' bands. The technique used was optical long-baseline interferometry, and we present for each star visibility amplitude measurements as a function of wavelength. We also present characteristic sizes at each spectral band, obtained by fitting the measured visibilities to a simple uniform disk model. This approach reveals the general relation J diameter < H diameter < K' diameter. Description: Observations were carried out at the Infrared Optical Telescope Array (IOTA), a long-baseline interferometer located on Mount Hopkins, AZ. The data presented here were obtained using the two telescopes available at the time on two configurations that provide physical baseline lengths of approximately 21 and 38m at geographic azimuth angles (measured east of north) of -4° and +18°, respectively. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 69 23 Basic properties of Mira star sample table2.dat 58 34 Log of observations table4.dat 54 259 Calibrated visibility data table5.dat 81 35 Near-infrared angular diameters and diameter ratios
See also: J/A+A/384/925 : Compiled catalog of stellar data of Miras (Kharchenko+, 2002) J/A+AS/120/275 : Mira variables light curves (Alard+ 1996) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 6 A6 --- Name Star name 8- 9 I2 h RAh Hour of Right Ascension (J2000.0) 11- 12 I2 min RAm Minute of Right Ascension (J2000.0) 14- 18 F5.2 s RAs Second of Right Ascension (J2000.0) 20 A1 --- DE- Sign of the Declination (J2000.0) 21- 22 I2 deg DEd Degree of Declination (J2000.0) 24- 25 I2 arcmin DEm Arcminute of Declination (J2000.0) 27- 30 F4.1 arcsec DEs Arcsecond of Declination (J2000.0) 32- 35 F4.1 mag Vmag1 Minimum of V band magnitude (1) 37 A1 --- --- [-] 39- 40 I2 mag Vmag2 Maximum of V band magnitude (1) 42- 45 F4.1 mag Jmag ? J band magnitude (2) 47- 51 F5.2 mag Hmag ? H band magnitude (2) 53- 56 F4.1 mag K'mag ? K' band magnitude (2) 58- 59 A2 --- SpType MK spectral type (1) 61- 63 I3 pc Dist ? Distance 65- 67 I3 pc e_Dist ? Error in Dist 69 I1 --- r_Dist ? Distance reference (3)
Note (1): V magnitudes and spectral types are from the AAVSO and SIMBAD databases. Note (2): Near-infrared magnitudes are from the 2MASS database. Note (3): Distance reference, defined as follows: 1 = Van Belle et al. (1997AJ....114.2150V) 2 = Jura & Kleinmann (1992ApJS...79..105J) 3 = van Belle et al. (2002AJ....124.1706V) 4 = Wyatt & Cahn (1983ApJ...275..225W) 5 = Young (1995ApJ...445..872Y)
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 6 A6 --- Name Star name 8- 17 A10 "YYYY/MM/DD" ObsDate Date of observation 19- 27 F9.1 d JD Julian date of observation 29- 34 A6 --- Baseline Baseline (1) 36- 42 A7 --- Filt Filters 43- 58 A16 --- Cal Calibrators
Note (1): SxNy refers to the south telescope being at the x meter station and the north telescope at the y meter station. The (length, azimuth) values of the S15N15 and S15N35 baselines are (21m, -3.8°) and (38m, +18°), respectively.
Byte-by-byte Description of file: table4.dat
Bytes Format Units Label Explanations
1- 6 A6 --- Name Star name 8- 17 A10 "YYYY/MM/DD" ObsDate Date of the observation 19- 25 I7 d JD Julian Date of the observation 27- 28 A2 --- Filt Spectral band 30- 35 F6.2 arcsec-1 u The u spatial frequency 37- 42 F6.2 arcsec-1 v The v spatial frequency 44- 48 F5.3 mag Vamp Calibrated visibility amplitude 50- 54 F5.3 mag e_Vamp Error in VAmp
Byte-by-byte Description of file: table5.dat
Bytes Format Units Label Explanations
1- 6 A6 --- Name Star name 8- 16 F9.1 d JD ? Julian date of observation 18- 21 F4.2 --- Phase ? Pulsation phase 23- 25 F3.1 --- Mtype ? Phased Spectral Type (M subclass) 27 A1 --- l_DJ Limit flag on DJ 28- 31 F4.1 mas DJ ? J band uniform disk diameter 33- 36 F4.1 mas e_DJ ? Error in DJ 38 A1 --- l_DH Limit flag on DH 39- 43 F5.2 mas DH ? H band uniform disk diameter 45- 49 F5.2 mas e_DH ? Error in DH 51 A1 --- l_DK' Limit flag on DK' 52- 56 F5.2 mas DK' ? K' band uniform disk diameter 58- 61 F4.2 mas e_DK' ? Error in DK' 63- 66 F4.2 --- DJ/DH ? DJ/DH diameter ratio 68- 71 F4.2 --- e_DJ/DH ? Error in DJ/DH 73- 76 F4.2 --- DH/DK' ? DH/DK' diameter ratio 78- 81 F4.2 --- e_DH/DK' ? Error in DH/DK'
History: From electronic version of the journal
(End) Greg Schwarz [AAS], Marianne Brouty [CDS] 08-Feb-2006
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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