CCD Observations and Period Change of the Type ab RR Lyrae Star DV Mon

Abstract

We took a total of 635 B-, V-, and Ic-band CCD frames for the RRab Lyr type variable DVMon, which has a close bright visual companion with a separation of about 1.9′. Observations were made with the 76-cm telescope of the South African Astronomical Observatory (SAAO, South Africa) using SBIG CCD ST-10XME. For the first time, we obtained reliable separate PSF-photometry of both stars and determined their coordinates. We used all available data to construct the OC diagram spanning a 110-year long time interval, which allowed us to reveal at least three sudden changes of the pulsation period around JD 2438000, 2453500, and 2456500. Our high resolution echelle spectra with the Southern African Large Telescope (SALT) showed that DV Mon belongs to type ab RR Lyrae variables of the Galactic thick disk.

This is a preview of subscription content, log in to check access.

References

  1. 1.

    L. N. Berdnikov, A. Y. Kniazev, R. Sefako, et al., Observatory 131, 315 (2011).

    ADS  Google Scholar 

  2. 2.

    L. N. Berdnikov, A. Y. Kniazev, R. Sefako, et al., Observatory 131, 386 (2011).

    ADS  Google Scholar 

  3. 3.

    L. N. Berdnikov, A. K. Dambis, A. Y. Kniazev, et al., Observatory 134, 206 (2014).

    ADS  Google Scholar 

  4. 4.

    C. Hoffmeister, Astronomische Nachrichten 259, 37 (1936).

    Article  ADS  Google Scholar 

  5. 5.

    P. Ahnert, C. Hoffmeister, E. Rohlfs, and A. van de Voorde, Veroeff. Sternwarte Sonneberg 1, 342 (1949).

    Google Scholar 

  6. 6.

    A. C. Layden, Publ. Astron. Soc. Pacific 109, 524 (1997).

    Article  ADS  Google Scholar 

  7. 7.

    M. Martignoni, J. Amer. Assoc. Variable Star Observers 32, 26 (2004).

    ADS  Google Scholar 

  8. 8.

    A. W. J. Cousins, Memoirs of the Royal Astronomical Society 81, 25 (1976).

    ADS  Google Scholar 

  9. 9.

    L. N. Berdnikov, O. V. Vozyakova, A. Y. Kniazev, et al., Astronomy Reports 56, 290 (2012).

    Article  ADS  Google Scholar 

  10. 10.

    D. G. Monet, S. E. Levine, B. Canzian, et al., Astron. J. 125, 984 (2003).

    Article  ADS  Google Scholar 

  11. 11.

    D. A. H. Buckley, G. P. Swart, and J. G. Meiring, Proc. of the SPIE 6267, 62670Z (2006).

    Article  ADS  Google Scholar 

  12. 12.

    D. O’Donoghue, D. A. H. Buckley, L. A. Balona, et al., Monthly Notices Royal Astron. Soc. 372, 151 (2006).

    Article  ADS  Google Scholar 

  13. 13.

    S. Barnes and P. MacQueen, Proc. of the SPIE7014, 70141H (2008).

    Article  ADS  Google Scholar 

  14. 15.

    D. G. Bramall, J. Schmoll, L. M. G. Tyas, et al., Proc. of the SPIE 8446, 84460A (2012).

    Article  Google Scholar 

  15. 16.

    L. A. Crause, R. M. Sharples, D. G. Bramall, et al., Proc. of the SPIE 9147, 91476T (2014).

    Article  Google Scholar 

  16. 17.

    S. M. Crawford, M. Still, P. Schellart, et al., Proc. of the SPIE 7737, 773725 (2010).

    Article  Google Scholar 

  17. 18.

    A. Y. Kniazev, V. V. Gvaramadze, and L. N. Berdnikov, Monthly Notices Royal Astron. Soc. 459, 3068 (2016).

    Article  ADS  Google Scholar 

  18. 19.

    P. R. T. Coelho, Monthly Notices Royal Astron. Soc. 440, 1027 (2014).

    Article  ADS  Google Scholar 

  19. 20.

    A. G. A. Brown et al. (Gaia Collab.), Astron. and Astrophys. 616, A1 (2018).

    Article  Google Scholar 

  20. 21.

    X. Luri, A. G. A. Brown, L. M. Sarro, et al., Astron. and Astrophys. 616, A9 (2018).

    Article  Google Scholar 

  21. 22.

    J. C. Zinn, M. H. Pinsonneault, D. Huber, and D. Stello, arXiv e-prints (2018).

    Google Scholar 

  22. 23.

    A. G. Riess, S. Casertano, W. Yuan, et al., Astro-phys. J. 861, 126 (2018).

    Article  ADS  Google Scholar 

  23. 24.

    L. N. Yalyalieva, A. A. Chemel, E. V. Glushkova, et al., Astrophysical Bulletin 73, 335 (2018).

    Article  ADS  Google Scholar 

  24. 25.

    G. M. Green, E. F. Schlafly, D. P. Finkbeiner, et al., Astrophys. J. 783, 114 (2014).

    Article  ADS  Google Scholar 

  25. 26.

    G. M. Green, E. F. Schlafly, D. Finkbeiner, et al., Monthly Notices Royal Astron. Soc. 478, 651 (2018).

    Article  ADS  Google Scholar 

  26. 27.

    A. K. Dambis, L. N. Berdnikov, A. Y. Kniazev, et al., Monthly Notices Royal Astron. Soc. 435, 3206 (2013).

    Article  ADS  Google Scholar 

  27. 28.

    G. F. Benedict, B. E. McArthur, M. W. Feast, et al., Astron. J. 142, 187 (2011).

    Article  ADS  Google Scholar 

  28. 29.

    E. Hertzsprung, Astronomische Nachrichten 210, 17 (1919).

    Article  ADS  Google Scholar 

  29. 30.

    L. N. Berdnikov, Sov. Astron. Lett. 18, 207 (1992).

    ADS  Google Scholar 

  30. 31.

    G. Pojmanski, Acta Astronomica 52, 397(2002).

    ADS  Google Scholar 

  31. 32.

    B. J. Shappee, J. L. Prieto, D. Grupe, et al., Astro-phys. J. 788, 48 (2014).

    Article  ADS  Google Scholar 

  32. 33.

    C. S. Kochanek, B. J. Shappee, K. Z. Stanek, et al., Publ. Astron. Soc. Pacific 129, 104502 (2017).

    Article  ADS  Google Scholar 

  33. 34.

    J. Alfonso-Garzoón, A. Domingo, J. M. Mas-Hesse, and A. Gime´nez, Astron. and Astrophys. 548, A79 (2012).

    Article  ADS  Google Scholar 

  34. 35.

    P. R. Wozniak, W. T. Vestrand, C. W. Akerlof, et al., Astron. J. 127, 2436 (2004).

    Article  ADS  Google Scholar 

  35. 36.

    The AAVSO International Database (https://doi.org/www.aavso.org) (2018).

  36. 37.

    E. G. Schmidt and A. Seth, Astron. J. 112, 2769 (1996).

    Article  ADS  Google Scholar 

  37. 38.

    J. F. Le Borgne, A. Klotz, and M. Boer, Inform. Bull. Variable Stars, No. 5767 (2007).

    Google Scholar 

  38. 39.

    J. F. Le Borgne, A. Klotz, and M. Boer, Inform. Bull. Variable Stars, No. 5790 (2007).

    Google Scholar 

  39. 40.

    J. F. Le Borgne, A. Klotz, and M. Boer, Inform. Bull. Variable Stars, No. 5877 (2009).

    Google Scholar 

  40. 41.

    J. F. Le Borgne, A. Klotz, and M. Boer, Inform. Bull. Variable Stars, No. 5895 (2009).

    Google Scholar 

  41. 42.

    J. F. Le Borgne, A. Klotz, and M. Boer, Inform. Bull. Variable Stars, No. 6009 (2012).

    Google Scholar 

  42. 43.

    J. F. Le Borgne, A. Klotz, and M. Boer, Inform. Bull. Variable Stars, No. 6043 (2013).

    Google Scholar 

Download references

Acknowledgements

We acknowledge with thanks the data from the NSVS, ASAS-3, ASAS-SN and INTEGRAL-OMC projects as well as from the AAVSO International Database contributed by observers worldwide. Authors acknowledge SALT-astronomer Dr. Danièl N. Groenewald for her assistance with HRS observations.

Author information

Affiliations

Authors

Corresponding author

Correspondence to L. N. Berdnikov.

Additional information

Russian Text © The Author(s), 2019, published in Astrofizicheskii Byulleten’, 2019, Vol. 74, No. 2, pp. 196–208.

Rights and permissions

Reprints and Permissions

About this article

Verify currency and authenticity via CrossMark

Cite this article

Berdnikov, L.N., Kniazev, A.Y., Dambis, A.K. et al. CCD Observations and Period Change of the Type ab RR Lyrae Star DV Mon. Astrophys. Bull. 74, 183–195 (2019). https://doi.org/10.1134/S199034131902007X

Download citation

Keywords

  • stars
  • variables
  • RR Lyrae