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J/AJ/131/612      Infrared-optical phase lags in AGB stars        (Smith+, 2006)

Phase lags in the optical-infrared light curves of asymptotic giant branch stars. Smith B.J., Price S.D., Moffett A.J. <Astron. J., 131, 612-620 (2006)> =2006AJ....131..612S
ADC_Keywords: Stars, late-type ; Infrared sources ; Stars, variable Keywords: infrared: stars - stars: AGB and post-AGB - stars: variables: other Abstract: To search for phase lags in the optical-infrared light curves of asymptotic giant branch stars, we have compared infrared data from the COBE DIRBE satellite with optical light curves from the AAVSO and other sources. We found 17 examples of phase lags between the times of infrared and optical maximum, and 4 stars with no observed lags. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 136 66 DIRBE stars with high quality optical and infrared light curves
See also: J/ApJS/154/673 : COBE DIRBE Point Source Catalog (Smith+, 2004) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 17 A17 --- DIRBE The DIRBE name 19- 24 A6 --- Name Source name 26 A1 --- r_Name [ab] Origin of optical light curve (1) 28- 30 A3 --- Var The GCVS variable type (see Cat. II/250) 32 A1 --- C/O The C/O type (2) 34- 36 I3 d Per1 The GCVS period (Cat. II/250) 38- 40 I3 d Per Period from this work 42- 46 F5.2 um Lambda Wavelength of the COBE filter used 48- 49 A2 --- l_<Lag1> [≥] Limit flag on <O/I-Lag1> 52- 54 I3 d <Lag1> First weekly average Optical/IR lag 56- 58 I3 d E_<Lag1> ? Upper limit error bar on <Lag1> 60- 62 I3 d e_<Lag1> ? Lower limit error bar on <Lag1> 64- 66 I3 d <Lag2> ? Second weekly average Optical/IR lag 68- 69 I2 d E_<Lag2> ? Upper limit error bar on <Lag2> 71- 72 I2 d e_<Lag2> ? Lower limit error bar on <Lag2> 74- 75 A2 --- l_<LagP1> [≥] Limit flag on <LagP1> 78- 82 F5.2 --- <LagP1> First weekly average Optical/IR phase lag 84- 87 F4.2 --- E_<LagP1> ? Upper limit error bar on <LagP1> 89- 92 F4.2 --- e_<LagP1> ? Lower limit error bar on <LagP1> 94- 98 F5.2 --- <LagP2> ? Second weekly average Optical/IR phase lag 100-103 F4.2 --- E_<LagP2> ? Upper limit error bar on <LagP2> 105-108 F4.2 --- e_<LagP2> ? Lower limit error bar on <LagP2> 110-111 A2 --- l_LagC1 [≥] Limit flag on LagC1 114-116 I3 d LagC1 First Optical/IR lag correlation 118-120 I3 d LagC2 ? Second Optical/IR lag correlation 122-123 A2 --- l_LagCP1 [≥] Limit flag on LagCP1 126-130 F5.2 --- LagCP1 First Optical/IR lag correlation 132-136 F5.2 --- LagCP2 ? Second Optical/IR lag correlation
Note (1): Flag on Name, defined as follows: a = Optical light curve from Percy, Wilson & Henry (2001PASP..113..983P) b = Optical light curve from Buchler, Kollath & Cadmus (2004ApJ...613..532B) Note (2): C/O type, defined as follows: O = oxygen-rich star C = carbon-rich star S = S-star
History: From electronic version of the journal
(End) Greg Schwarz [AAS], Marianne Brouty [CDS] 03-Nov-2006
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