[논문]PHOTOMETRIC STUDY OF THE NEAR-CONTACT BINARY CN ANDROMEDAE

Lee Chung-Uk; Lee Jae-Woo

doi:10.5303/jkas.2006.39.1.025

PHOTOMETRIC STUDY OF THE NEAR-CONTACT BINARY CN ANDROMEDAE 원문보기

Journal of the Korean astronomical society = 천문학회지, v.39 no.1, 2006년, pp.25 - 30

Lee Chung-Uk (Korea Astronomy and Space Science Institute) , Lee Jae-Woo (Astrophysical Research Center for the Structure and Evolution of the Cosmos, Sejong University)

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We completed four color light curves of the near-contact binary CN And during three nights from September to December 2004 using the 61-cm reflector and BV RI filters at Sobaeksan Observatory. We determined four new times of minimum light (two timings for primary eclipse, two for secondary). Newly obtained BV RI light curves and the radial velocity curves from Rucinski et a1. (2000) were simultaneously analyzed to derive the system parameters of CN And. We used the semi-detached mode 4 of the 2003-version of the Wilson-Devinney binary model, and interpreted the asymmetry of the light curve by introducing two spots; a cool spot on the primary component and a hot spot on the secondary component. New photometric parameters are not much different from those of Cicek et a1. (2005), and it is considered that the system is in the era of broken contact. From the orbital period study with all available timings including our data, we found a continous period decrease with a rate of $P_{obs}=--1.82{\times}10^{-7}\;d\;yr^{-1}$ that can be explained with two possible mechanisms. We think the most likely cause of the period decrease is a thermal mass transfer from the primary to the secondary component, rather than angular momentum loss due to a magnetic stellar wind.

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To reduce the CCD readout time, the CCD was set to 2 x 2 binning mode. Considering the linear range of the CCD, the exposure times of BVRI bands were set to 25, 15, 10, and 10 seconds, respectively. The FWHM of the star image was kept to 2.
09 x 10-8 yr-1. In this paper, the results of new CCD photometry for CN And are presented together with a light curve synthesis and a period analysis.

이론/모형

To analyze the newly obtained BVRI light curves and the radial velocity curves from Rucinski et al. (2000) simultaneously, we used mode 4 of the 2003 W-D binary code (Wilson & Devinney 1971). In the analysis, we adopted reasonable parameter values from various literatures as follows: the temperature of primary component T】was assumed to be 6500K corresponding to the spectral type of F5V (Rucinski et al.

참고문헌 (33)

Bozkurt, S., Gulmen, O., Ibanoglu, C., & Gudur, N., 1976, Photoelectric Light-Curves of CN And, IBVS, 1087
Branly, R. M., 1992, A Photometric Study of AK Herculis and CN Andromedae, Master's thesis, Stephan F. Austin State Univ
Cicek, A., Erdem, A., & Soydugan, F., 2005, A near-contact binary: CN Andromedae, AN., 326, 127
de Jager, C. & Nieuwenhuijzen, H., 1987, A new determination of the statistical relations between stellar spectral and luminosity classes and stellar effective temperature and luminosity, A&A, 177, 217
Dempsey, R. C., Linsky, J. L., Fleming, T. A., & Shmitt, J. H. M. M., 1993, Observations of the CA II infrared triplet in chromospherically active single and binary stars, ApJS, 86, 599

상세보기
Evren, S., Ibanoglu, C., Tunca, Z., Akan, M. C., & Keskin, V., 1987, The 1986 Observations and the Period Study of CN Andromedae, IBVS, 3109
Flannery, B. P., 1976, A Cyclic Thermal Instability in Contact Binary Stars, ApJ, 205, 217

상세보기
Guinan, E. F. & Bradstreet, D. H., 1988, in Formation and Evolution of Low Mass Stars, eds. A. K. Dupree and M. T. V. T. Lago (Dordrecht: Kluwer), 345
Hoffmeister, C., 1949, Die RW Aurigae-Sterne und ihre Nebenformen, AN, 12, 1
Kaluzny, J., 1983, CN And - W UMa-type system in the phase of poor thermal contact?, AcA, 33, 345
Keskin, V., 1989, Light changes of the close binary system CN Andromedae , Ap&SS, 153, 191
Kim, S.-L., Kyung, J.-M., Kwon, S.-G., & Yoon, J.-H., 2001, An Observational Program for the SOAO 2K CCD Camera, PKAS, 16, 37
Kreiner, J. M., Kim, C.-H., & Nha, I.-S., 2001, An Atlas of O-C Diagrams of Eclipsing Binary Stars (Krakow: Wydawn. Nauk. Akad. Pedagogicznej)
Kwee, K. K & van Woerden, H., 1956, Bull. Astron. Inst. Netherlands, A method for computing accurately the epoch of minimum of an eclipsing variable, 12, 327
Lee, C.-U., Park, S.-S., Kim, C.-H., & Byun, Y.-I., 2003, A Construction of a Small Semi-automatic Telescope for Eclipse Timing Observations of Eclipsing Binary stars, Journal of Astronomy & Space Science, 20, 143

원문보기 상세보기
Lochel, K., 1960, Mitteilungen Uber Veranderliche Sterne, 457-458
Lucy, L. B., 1967, Gravity-Darkening for Stars with Convective Envelopes, Zeitschrift fur Astrophysik, 65, 89
Lucy, L. B., 1976, Mass Loss by Cool Carbon Stars, ApJ, 205, 208

상세보기
Paczynski, B., 1971, Evolutionary Processes in Close Binary Systems, ARA&A, 9, 183

상세보기
Pringle, J. E., 1975, Period changes in eruptive binaries, MNRAS, 170, 633
Rafert, J. B., Markworth, N. L., & Michaels, E. J., 1985, Photoelectric observations of CN Andromedae - an unusual overcontact binary, PASP, 97, 310

상세보기
Robertson, J. A. & Eggleton, P. P., 1977, The infrared variability and nature of symbiotic stars, MNRAS, 179, 359
Rucinski, S. M., 1969, The Photometric Proximity Effects in Close Binary Systems. I. The Distortion of the Components and the Related Effects in Early Type Binaries, A&A, 19, 245
Rucinski, S. M., Lu, W., & Mochnacki, S. W., 2000, Radial Velocity Studies of Close Binary Stars. III, AJ, 120, 1133

상세보기
Samec, R. G., Laird, H., Mutzke, M., & Faulkner, D. R., 1998, DBV Observations of the Solar-Type Near Contact Binary, CN Andromedae, IBVS, 4616
Seeds, M. A. & Abernethy, D. K., 1982, Photoelectric observations of CN Andromedae, PASP, 94, 1001

상세보기
Shaw, J. S., 1994, Near-contact binaries, MmSAI, 65, 95
Shaw, J. S., Caillault, J. P., & Schmitt, J. H. M. M., 1996, Near-Contact Binary Systems in the ROSAT All-Sky Survey, ApJ, 461, 951

상세보기
Van Hamme, W., 1993, New limb-darkening coefficients for modeling binary star light curves, AJ, 106, 2096
Van Hamme, W., Samec, R. G., Gothard, N. W., Wilson, R. E., Faulkner, D. R., & Branly, R.. M., 2001, CN Andromedae: A Broken-Contact Binary?. AJ, 122, 3436

상세보기
Webbnik, R. F., 1976, The evolution of low-mass close binary systems. I - The evolutionary fate of contact binaries, ApJ, 209, 829

상세보기
Wilson, R. E. & Devinney, E. J., 1971, Realization of Accurate Close-Binary Light Curves: Application to MR Cygni, ApJ, 166, 605

상세보기
Yang, Y. & Liu, Q., 1985, A Flare on the Contact Binary CN And. IBVS. 2705

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PHOTOMETRIC STUDY OF THE NEAR-CONTACT BINARY CN ANDROMEDAE 원문보기

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