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J/AJ/99/784         IR photometry of LMC long-period variables (Hughes+ 1990)

Long-period variables in the Large Magellanic Cloud. II. Infrared photometry, spectral classification, AGB evolution, and spatial distribution. Hughes S.M.G., Wood P.R. <Astron. J. 99, 784 (1990)> =1990AJ.....99..784H (SIMBAD/NED BibCode)
ADC_Keywords: Magellanic Clouds ; Stars, variable ; Photometry, infrared ; MK spectral classification Abstract: Infrared JHK photometry and visual spectra have been obtained for a large sample of long-period variables (LPVs) in the Large Magellanic Cloud (LMC). Various aspects of the asymptotic giant branch (AGB) evolution of LPVs are discussed using these data. The birth/death rate of LPVs of different ages in the LMC is compared with the birth rates of appropriate samples of planetary nebulae clump stars, Cepheids, and OH/IR stars. It appears that there are much fewer large-amplitude LPVs per unit galactic stellar mass in the LMC than in the Galaxy. We suggest that this may be due to the fact that the evolved intermediate-age AGB stars in the LMC often turn into carbon stars, which tend to have smaller pulsation amplitudes than M stars. There is also a major discrepancy between the number of LPVs in the LMC (and in the Galaxy) and the number predicted by the theories of AGB evolution, pulsation, and mass loss. A distance modulus to the LMC of 18.66+0.05 is derived by comparing the LMC LPVs with P∼200days with the 47 Tucanae Mira variables in the (K, logP) plane. The (K, logP) relation is also used to examine the tilt of the LMC populations of old and intermediate-age stars. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2 92 376 JHK photometry of large-amplitude LPVs table3 92 224 JHK photometry of small-amplitude LPVws table4 92 15 JHK photometry of old variables table5 116 29 LPV - IRAS proximity matches table6 48 14 LPVs excluded from (K, log P) fit
Byte-by-byte Description of file: table2 table3 table4
Bytes Format Units Label Explanations
1- 17 A17 --- Name LPV name/position (1) 18 A1 --- n_Name [abc] Note on name (2) 20- 23 F4.2 mag DImag Peak to peak I amplitude 25- 31 I7 d JDImax Julian date of a recent I maximum 33- 37 F5.2 mag Imag Mean I magnitude 39- 43 F5.2 mag Jmag J magnitude 44 A1 --- u_Jmag Uncertainty flag on Jmag (0.05≤e_Jmag≤0.13) 46- 50 F5.2 mag Hmag H magnitude 51 A1 --- u_Hmag Uncertainty flag on Hmag (0.05≤e_Hmag≤0.13) 53- 57 F5.2 mag Kmag K magnitude 58 A1 --- u_Kmag Uncertainty flag on Kmag (0.05≤e_Kmag≤0.13) 60- 65 F6.2 mag Mbol Bolometric magnitude derived from K and J-K 67- 70 A4 --- SpType Spectral type obtained by spectroscopy, or, if enclosed in parentheses, from J-K 72- 78 I7 d JD Julian date at which the photometry was obtained 80- 83 I4 d Per ? Period of the variable 84- 85 A2 --- u_Per [: ] Marginal periodic variables 87- 90 I4 d Per2 ? Second period (3) 91- 92 A2 --- u_Per2 [: ] Marginal periodic variables
Note (1): SHV refers to the variables found in Hughes (1989AJ.....97.1634H) RHV refers to the variables found in Reid et al. (1988MNRAS.232...53R) raw photometry data using the methods of paper I (Hughes, 1989AJ.....97.1634H) that were not found by Reid et al. (1988MNRAS.232...53R). Note (2): a : Merged (double) image b : Near a bright star c : Near a cluster Note (3): Occasionally, a second period gave a convincing light curve and this second period has also been included, with the period giving the more believable light curve in column Per
Byte-by-byte Description of file: table5
Bytes Format Units Label Explanations
1- 17 A17 --- Name LPV name/position (1) 19- 21 I3 d Per Period of the variable 22- 23 A2 --- u_Per [: ] Uncertainty flag on Per 25- 29 A5 --- SpType Spectral type (2) 31- 34 F4.2 mag DImag ? Peak to peak I amplitude (2) 36- 40 F5.2 mag Imag ? I magnitude (2) 42- 46 F5.2 mag Jmag ? J magnitude (2) 48- 52 F5.2 mag Hmag ? H magnitude (2) 54- 58 F5.2 mag Kmag ? K magnitude (2) 60- 73 A14 --- IRAS IRAS name 75 A1 --- l_F12 Limit flag on F12 76- 80 F5.2 mJy F12 12µm flux density 81 A1 --- u_F12 Uncertainty flag on F12 83 A1 --- l_F25 Limit flag on F25 84- 88 F5.2 mJy F25 25µm flux density 89 A1 --- u_F25 Uncertainty flag on F25 91 A1 --- l_F60 Limit flag on F60 92- 97 F6.2 mJy F60 ? 60µm flux density 98 A1 --- u_F60 Uncertainty flag on F60 100 A1 --- l_F100 Limit flag on F100 101-106 F6.2 mJy F100 ? 100µm flux density 107 A1 --- u_F100 Uncertainty flag on F100 109-111 I3 arcsec Xoffset Offset on X position 114-116 I3 arcsec Yoffset Offset on Y position
Note (1): SHV refers to the variables found in Hughes (1989AJ.....97.1634H) GRV refers to the variables in Reid et al., (1988MNRAS.232...53R) RHV refers to the variables found in Reid et al. (1988MNRAS.232...53R) raw photometry data using the methods of paper I, (Hughes, 1989AJ.....97.1634H), that were not found by Reid et al. (1988MNRAS.232...53R). HV refers to Harvard variables, Hodge & Wright, 1967, Smithsonian Inst. Astrophys. Obs. No. 4699 Note (2): Spectral types and JHK photometry of Harvard variables (HV) from Wood et al. (1983ApJ...272...99W), and their I and {DELTA}I from Reid et al. (1988MNRAS.232...53R). Photometry of GRV stars from Reid et al. (1988MNRAS.232...53R).
Byte-by-byte Description of file: table6
Bytes Format Units Label Explanations
1- 17 A17 --- Name LPV name/position (1) 19- 21 I3 d Per Period of the variable 23- 27 F5.2 mag Imag Mean I magnitude 29- 32 F4.2 mag DImag Peak to peak I amplitude 34- 37 F4.2 mag J-H J-H colour index 39- 42 F4.2 mag H-K H-K colour index 44- 48 F5.2 mag Kmag K magnitude
Note (1): SHV refers to the variables found in Hughes (1989AJ.....97.1634H) -------------------------------------------------------------------------------- Table VII. LPV bar density distribution. -------------------------------------------------------------------------------- Period N ρ0 A B θ0 X0 Y0 Group N/deg2 deg deg deg deg deg -------------------------------------------------------------------------------- 100- 225 207 8.8±0.8 4.6±0.9 1.3±0.1 117± 3 0.0±0.1 0.0± 0.1 225- 450 347 10.8±0.6 3.6±0.3 2.2±0.1 112± 5 0.0±0.1 -0.02±0.02 450-1000 38 2.0±0.4 6.0±5.7 3.1±1.2 134±40 0.3±0.7 -0.3 ±1.0
History: Prepared via OCR at CDS. References: Hughes, Paper I., 1989AJ.....97.1634H
(End) James Marcout, Patricia Bauer [CDS] 16-May-1997
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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