J/AJ/117/2980 NIR photometric studies of R Canis Majoris (Varricatt, 1999)
Near-infrared photometric studies of R Canis Majoris
Varricatt W.P., Ashok N.M.
<Astron. J. 117, 2980 (1999)>
=1999AJ....117.2980V 1999AJ....117.2980V
ADC_Keywords: Binaries, eclipsing ; Binaries, orbits ; Photometry, infrared
Keywords: binaries: eclipsing - infrared radiation - stars:
activity - stars: individual (R Canis Majoris)
Abstract:
We present here the first light curves of the peculiar Algol binary
system R Canis Majoris obtained in the near-infrared photometric bands
J and K. The light curves are fitted for a semidetached model with the
Wilson-Devinney light-curve synthesis program. Five epochs of primary
minima and four epochs of secondary minima are obtained in the present
study. The increased depth of the secondary minima in the near-IR
bands compared with the optical bands enabled us to determine the
moments of secondary minima with nearly the same accuracy as those of
primary minima. All the secondary minima appear at phase 0.5, and the
durations are equal for the primary and the secondary eclipses. The
epochs of primary minima follow the nearly sinusoidal O-C curve that
has been observed for this star in previous studies. The values of O-C
for the secondary minima were in the same range as those of the
primary minima observed by us.
Objects:
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RA (2000) DE Designation(s)
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07 19 28.2 -16 23 43 R CMa = SAO 152724 = HD 57167
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table12.dat 31 837 J-Band light curve of R Canis Majoris
table13.dat 31 972 K-Band light curve of R Canis Majoris
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Byte-by-byte Description of file: table12.dat
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Bytes Format Units Label Explanations
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1- 13 F13.5 d JD Julian date
17- 22 F6.4 --- phase Phase of orbit
26- 31 F6.3 mag DelJmag Change in J band magnitude
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Byte-by-byte Description of file: table13.dat
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Bytes Format Units Label Explanations
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1- 13 F13.5 d JD Julian date
17- 22 F6.4 --- phase Phase of orbit
26- 31 F6.3 mag DelKmag Change in K band magnitude
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History:
From AJ electronic edition
References:
Wilson, R. E., & Devinney, E. J. 1971, ApJ, 166, 605 (1971ApJ...166..605W 1971ApJ...166..605W)
(End) Greg Schwarz [AAS] 10-Apr-2000