JOURNAL BROWSE
Search
Advanced SearchSearch Tips
NEW CCD OBSERVATIONS AND THE FIRST PHOTOMETRIC STUDY OF THE CONTACT BINARY AP UMI
facebook(new window)  Pirnt(new window) E-mail(new window) Excel Download
 Title & Authors
NEW CCD OBSERVATIONS AND THE FIRST PHOTOMETRIC STUDY OF THE CONTACT BINARY AP UMI
AWADALLA, N.S.; HANNA, M.A.; ISMAIL, M.N.; HASSAN, I.A.; ELKHAMISY, M.A.;
  PDF(new window)
 Abstract
We obtain the first complete CCD light curves (LCs) of the contact binary AP UMi in the VRI bands and analyzed them by means of the PHOEBE code. A spotted model is applied to treat the asymmetry in the LCs. The LC morphology clearly shows the O`Connell effect and the solution shows an influence of star spots on both components. Such effect of star spots is common between the RS CVn and W UMa chromospherically active stars. Based on the obtained solution of the LCs we investigate the evolutionary state of the components and conclude that the system is a pre-intermediate contact binary (f
 Keywords
stars;binaries;close;binaries;eclipsing;W UMa;stars;individual AP UMi;
 Language
English
 Cited by
 References
1.
Binnendijk, L. 1970, The Orbital Elements of W Ursae Majoris Systems, Vistas in Astronomy, 12, 217 crossref(new window)

2.
Bradstreet, D. H., & Guinan, E. F. 1994, Stellar Mergers and Acquisitions: The Formation and Evolution of W Ursae Majoris Binaries, in ASP Conf. Ser., 56, 228

3.
Cox, A. N. 2002, Allen's Astrophysical Quantities, 4th edn. (New York: Springer)

4.
Cutri, R. M., Skrutskie, M. F., van Dyk, S., et al. 2003, VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources, yCat, 2246, 0

5.
El-Sadek, M. A. 2002, Study of the Properties of Some Late-Type Eclipsing Binary Systems, MSc Thesis, Cairo University, Egypt

6.
Eggen, O. J. 1967, Contact Binaries II, Mem. Royal Astron. Soc., 70, 111

7.
Eggen, O. J., & Iben, I. J. 1989, Starbursts, Blue Stragglers, and Binary Stars in Local Superclusters and Groups. II – The Old Disk and Halo Populations, AJ, 97, 431 crossref(new window)

8.
Guinan, E. F., Ribas, I., Fitzpatrick, E. L., Gimenez, A., Jordi, C., McCook, G. P., & Popper, D. M. 2000, Eclipsing Binaries as Astrophysical Laboratories: Internal Structure, Core Convection, and Evolution of the B-Star Components of V380 Cygni, ApJ, 544, 409 crossref(new window)

9.
Kazarovets, E. V., Samus, N. N., Durlevich, O. V., Kireeva, N. N., & Pastukhova, E. N. 2015, The 81st Name-List of Variable Stars. Part I – RA 00h to 17h30, IBVS 6151

10.
Khrusiov, A. V. 2012, 43 New Variable Stars, Peremennye Zvezdy Prilozhenie, 12, No. 6

11.
Lohr, M. E., Norton, A. J., Kolb, U. C., Anderson, D. R., Faedi, F., & West, R. G. 2012, Period Decrease in Three SuperWASP Eclipsing Binary Candidates Near the Short-Period Limit, A&A, 542, 124 crossref(new window)

12.
Lucy, L. B. 1967, Gravity-Darkening for Stars with Convective Envelopes, Z. Astrophys., 65, 89

13.
O’Connell, D. M. K. 1951, The So-Called Periastron Effect in Close Eclipsing Binaries; New Variable Stars (fifth list), Riverview Pub., 2, 85

14.
Monet, D. G. 1998, The 526,280,881 Objects In The USNO-A2.0 Catalog, BAAS, 30, 1427

15.
Pribulla, T., Kreiner, J. M., & Tremko, J. 2003, Catalogue of the Field Contact Binary Stars, CoSka, 33, 38

16.
Prša, A., & Zwitter, T. 2005, A Computational Guide to Physics of Eclipsing Binaries. I. Demonstrations and Perspectives, ApJ, 628, 426 crossref(new window)

17.
Rucinski, S. M. 1973, The Photometric Proximity Effects in Close Binary Systems. VI. The Exact Solution for the Source Function in Monodirectional Illumination of the Grey Atmosphere, AcA, 23, 301

18.
Rucinski, S. M. 1974, Binaries. II. A- and W-Type Systems. The W UMa-Type Systems as Contact, AcA, 24, 119

19.
Rucinski, S. M. 2007, The Short-Period End of the Contact Binary Period Distribution Based on the All-Sky Automated Survey, MNRAS, 382, 393 crossref(new window)

20.
Schlegel, D. J., Finkbeiner, D. P., & Davis, M. 1998, Maps of Dust Infrared Emission for Use in Estimation of Reddening and Cosmic Microwave Background Radiation Foregrounds, ApJ, 500, 525 crossref(new window)

21.
Schlafly, E. F., & Finkbeiner, D. P. 2011, Measuring Reddening with Sloan Digital Sky Survey Stellar Spectra and Recalibrating SFD, ApJ, 737, 103 crossref(new window)

22.
Smith, R. C. 1984, The Theory of Contact Binaries, Quart. J. Royal Astron. Soc., 25, 405

23.
Torres, G., & Ribas, I. 2002, Absolute Dimensions of the M-Type Eclipsing Binary YY Geminorum (Castor C): A Challenge to Evolutionary Models in the Lower Main Sequence, ApJ, 567, 1140 crossref(new window)

24.
van Hamme, W. 1993, New Limb-Darkening Coefficients for Modeling Binary Star Light Curves, AJ, 106, 2096 crossref(new window)

25.
Vilhu, O. 1982, Detached to Contact Scenario for the Origin of W UMa Stars, A&A, 109, 17

26.
Wang, J. M. 1994, The Thermal Relaxation Oscillation States of Contact Binaries, ApJ, 434, 277 crossref(new window)

27.
Zacharias, N., Monet, D. G., Levine, S. E., Urban, S. E., Gaume, R., &Wycoff, G. L. 2004, The Naval Observatory Merged Astrometric Dataset (NOMAD), AAS, 205, 4815