Skip to main content
SpringerLink
Log in

Young stars in gas-dust disks. II. Vega (α Lyr) and β Pic

  • Published:
Astrophysics Aims and scope

Observational data for Vega, α Lyr in the 325-1080 nm range from various years are studied using material stored at the Pulkovo Spectrophotometric Data Base (PSDB). It is shown that the spectrophotometric temperature of the star was lower than the effective temperature according to data from all the observational seasons. Possible reasons for this are examined: light scattering by small particles in the ultraviolet and reflection by large particles at longer wavelengths. A difference of 0m.01-0m.02 in the quasimonochromatic magnitudes of the star is obtained for observations in different seasons. This difference may related to a large-scale inhomogeneity in the distribution of dust and gas in the disk. Photometric data for the star β Pic in the Hipparcos catalog reveal periodic variations in the Vt magnitude with a period of 4.46 d and an amplitude of 0m.0085. Three assumptions are made to explain this result: pulsations in the star’s photosphere, a planet at a distance of ~0.1 a.u., and a region with an elevated density of particles in the circumstellar disk that periodically eclipses the star as it undergoes Kepler rotation. These assumptions require further confirmation.

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

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

References

  1. A.-M. Lagrange, M. Bonnefoy, G. Clauvin, et al., Science 329, 57 (2010).

    Article  ADS  Google Scholar 

  2. S. P. Quanz, M. R. Meyer, M. A. Kenworthy, et al., Astrophys. J. 722, L49-L53 (2010).

    Article  ADS  Google Scholar 

  3. The Hipparcos and Tycho Catalogues, ESA SP-1200, ESA (1997).

  4. G. A. Alekseeva, A. A. Arkharov, V. D. Galkin, et al., Baltic Astronomy 5, 603 (1996).

    ADS  Google Scholar 

  5. G. A. Alekseeva, A. A. Arkharov, V. D. Galkin, et al., Baltic Astronomy 6, 481 (1997).

    ADS  Google Scholar 

  6. D. Hoffleit, C. Jascek, The Bright Star Cataloge, New-Haven (1982), p. 472.

  7. E. V. Ruban and A. A. Arkharov, Astrofizika 55 (1), 65 (2012); Astrophysics 55 (1), 53 (2012).

  8. E. I. Pustil’nik, Statistical Techniques for Analysis and Processing of Observations [in Russian], Nauka, Moscow (1968).

    Google Scholar 

  9. R. L. Kurucz, Astrophys. J. Suppl. Ser. 40, 1 (1979).

    Article  ADS  Google Scholar 

  10. Hil Graham, A. F. Gulliver, S. J. Adelman, Astrophys. J. 712, 250 (2010).

    Article  ADS  Google Scholar 

  11. H. van de Hulst, Light Scattering by Small Particles [Russian translation], IL (1961).

  12. E. Di. Folco, F. Thevenin, P. Kervella, et al., Astron. Astrophys. 426, 601 (2004).

    Article  ADS  Google Scholar 

  13. F. Galland, A.-M. Lagrange, S. Udry, et al., Astron. Astrophys. 447, 355 (2006).

    Article  ADS  Google Scholar 

  14. General Catalogue of Variable Stars, Samus + (2007-2011).

Download references

Author information

Authors and Affiliations

  1. Main (Pulkovo) Astronomical Observatory, Russian Academy of Sciences, Pulkovo, Russia

    E. V. Ruban & A. A. Arkharov

Authors
  1. E. V. Ruban
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. A. A. Arkharov
    View author publications

    You can also search for this author in PubMed Google Scholar

Corresponding author

Correspondence to E. V. Ruban.

Additional information

Translated from Astrofizika, Vol. 55, No. 2, pp. 175-188 (May 2012).

Rights and permissions

Reprints and permissions

About this article

Cite this article

Ruban, E.V., Arkharov, A.A. Young stars in gas-dust disks. II. Vega (α Lyr) and β Pic. Astrophysics 55, 156–168 (2012). https://doi.org/10.1007/s10511-012-9224-y

Download citation

  • Received:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s10511-012-9224-y

Keywords

Search

Navigation