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Kinematics of Hot Subdwarfs from the Gaia DR2 Catalogue

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Abstract

We have studied the kinematic properties of the candidates for hot subdwarfs (HSDs) selected by Geier et al. from theGaiaDR2 catalogue. We have used a total of 12 515 stars with relative trigonometric parallax errors less than 30%. The HSDs are shown to have different kinematics, depending on their positions on the celestial sphere. For example, the sample of low-latitude (|b| < 20°) HSDs rotates around the Galactic center with a linear velocity V0 = 221 ± 5 km s−1. This suggests that they belong to the Galactic thin disk. At the same time, they lag behind the local standard of rest by ΔV☉ ~ 16 km s−1 due to the asymmetric drift. The high-latitude (|b| ≥ 20°) HSDs rotate with a considerably lower velocity, V☉ = 168 ± 6 km s−1. Their lagging behind the local standard of rest is already ΔV☉ ∼ 40 km s−1. Based on the entire sample of 12 515 HSDs, we have found a positive rotation around the x axis significantly differing from zero with an angular velocity ω1 = 1.36±0.24 km s−1 kpc−1. We have studied the samples of HSDs that are complete within r < 1.5 kpc. Based on them, we have traced the evolution of the parameters of the residual velocity ellipsoid as a function of both latitude |b| and coordinate |z|. The following vertical disk scale heights have been found: h = 180 ± 6 and 290 ± 10 pc from the low- and high-latitude HSDs, respectively. A new estimate of the local stellar density Σout = 53 ± 4 M☉ kpc−2 has been obtained for zout = 0.56 kpc from the high-latitude HSDs.

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References

  1. M. Altmann, H. Edelmann, and K. S. de Boer, Astron. Astrophys. 414, 181 (2004).

    Article  ADS  Google Scholar 

  2. B. Anguiano, S. R. Majewski, K. C. Freeman, A.W. Mitschang, and M. C. Smith, Mon. Not. R. Astron. Soc. 474, 854 (2018).

    Article  ADS  Google Scholar 

  3. F. Arenou, X. Luri, C. Babusiaux, C. Fabricius, A. Helmi, T. Muraveva, A. C. Robin, F. Spoto, et al. (Gaia Collab.), Astron. Astrophys. 616, 17 (2018).

    Article  Google Scholar 

  4. V. V. Bobylev, Astron. Lett. 36, 634 (2010).

    Article  ADS  Google Scholar 

  5. V. V. Bobylev, Astron. Lett. 39, 819 (2013).

    Article  ADS  Google Scholar 

  6. V. V. Bobylev and A. T. Bajkova, Astron. Lett. 40, 389 (2014).

    Article  ADS  Google Scholar 

  7. V. V. Bobylev and A. T. Bajkova, Astron. Lett. 42, 1 (2016).

    Article  ADS  Google Scholar 

  8. V. V. Bobylev and A. T. Bajkova, Astron. Lett. 43, 452 (2017a).

    Article  ADS  Google Scholar 

  9. V. V. Bobylev and A. T. Bajkova, Astron. Lett. 43, 304 (2017b).

    Article  ADS  Google Scholar 

  10. V. V. Bobylev and A. T. Bajkova, Astron. Lett. 45, 208 (2019).

    Article  ADS  Google Scholar 

  11. C. Bonatto, L. O. Kerber, E. Bica, and B. X. Santiago, Astron. Astrophys. 446, 121 (2006).

    Article  ADS  Google Scholar 

  12. J. Bovy and H.-W. Rix, Astrophys. J. 779, 115 (2013).

    Article  ADS  Google Scholar 

  13. A. G. A. Brown, A. Vallenari, T. Prusti, J. de Bruijne, F. Mignard, R. Drimmel, et al. (Gaia Collab.), Astron. Astrophys. 595, 2 (2016).

    Google Scholar 

  14. A. G. A. Brown, A. Vallenari, T. Prusti, de Bruijne, C. Babusiaux, C. A. L. Bailer-Jones, M. Biermann, D. W. Evans, et al. (Gaia Collab.), Astron. Astrophys. 616, 1 (2018).

    Google Scholar 

  15. Y. Bu, Z. Lei, G. Zhao, J. Bu, and J. Pan, Astrophys. J. Suppl. Ser. 233, 2 (2017).

    Article  ADS  Google Scholar 

  16. T. Camarillo, M. Varun, M. Tyler, and R. Bharat, Publ. Astron. Soc. Pacif. 130, 4101 (2018).

    Article  Google Scholar 

  17. M. Chiba and T. C. Beers, Astron. J. 119, 2843 (2000).

    Article  ADS  Google Scholar 

  18. G. Fontaine, P. Brassard, S. Charpinet, E. M. Green, S. K. Randall, and V. Van Grootel, Astron. Astrophys. 539, 12 (2012).

    Article  ADS  Google Scholar 

  19. B. Fuchs, C. Dettbarn, H.-W. Rix, T. C. Beers, D. Bizyaev, H. Brewington, H. Jahreiss, R. Klement, et al., Astron. J. 137, 4149 (2009).

    Article  ADS  Google Scholar 

  20. S. Geier, S. Nesslinger, U. Heber, N. Przybilla, R. Napiwotzki, and R.-P. Kudritzki, Astron. Astrophys. 464, 299 (2007).

    Article  ADS  Google Scholar 

  21. S. Geier, T. Kupfer, U. Heber, V. Schaffenroth, B. N. Barlow, R. H. Oestensen, S. J. O’Toole, E. Ziegerer, et al., Astron. Astrophys. 577, 26 (2015).

    Article  Google Scholar 

  22. S. Geier, R. Raddi, N. P. Gentile Fusillo, and T. R. Marsh, Astron. Astrophys. 621, 38 (2019).

    Article  ADS  Google Scholar 

  23. J. L. Greenstein and A. I. Sargent, Astrophys. J. Suppl. 28, 157 (1974).

    Article  ADS  Google Scholar 

  24. R. de Grijs and G. Bono, Astrophys. J. Suppl. Ser. 232, 22 (2017).

    Article  ADS  Google Scholar 

  25. Z. Han, Ph. Podsiadlowski, and A. E. Lynas-Gray, Mon. Not. R. Astron. Soc. 380, 1098 (2007).

    Article  ADS  Google Scholar 

  26. The HIPPARCOS and Tycho Catalogues, ESA SP-1200 (1997).

    Google Scholar 

  27. J. Holmberg and C. Flynn, Mon. Not. R. Astron. Soc. 352, 440 (2004).

    Article  ADS  Google Scholar 

  28. M. L. Humason and F. Zwicky, Astrophys. J. 105, 85 (1947).

    Article  ADS  Google Scholar 

  29. R. Kipper, E. Tempel, and P. Tenjes, Mon. Not. R. Astron. Soc. 473, 2188 (2018).

    Article  ADS  Google Scholar 

  30. V. I. Korchagin, T. M. Girard, T. V. Borkova, D. I. Dinescu, and W. F. van Altena, Astron. J. 126, 2896 (2003).

    Article  ADS  Google Scholar 

  31. T. Kupfer, S. Geier, U. Heber, R. H. Ostensen, B. N. Barlow, P. F. L. Maxted, C. Heuser, V. Schaffenroth, and B. T. Gänsicke, Astron. Astrophys. 576, (2015).

  32. M. Latour, P. Chayer, E. M. Green, A. Irrgang, and G. Fontaine, Astron. Astrophys. 609, 89 (2018).

    Article  ADS  Google Scholar 

  33. Z. Lei, G. Zhao, A. Zeng, L. Shen, Z. Lan, D. Jiang, and Z. Han, Mon. Not. R. Astron. Soc. 463, 3449 (2016).

    Article  ADS  Google Scholar 

  34. L. Lindegren, U. Lammers, U. Bastian, J. Hernandez, S. Klioner, D. Hobbs, A. Bombrun, D. Michalik, et al., Astron. Astrophys. 595, 4 (2016).

    Article  Google Scholar 

  35. L. Lindegren, J. Hernandez, A. Bombrun, S. Klioner, U. Bastian, M. Ramos-Lerate, A. de Torres, H. Steidelmuller, et al. (Gaia Collab.), Astron. Astrophys. 616, 2 (2018).

    Article  Google Scholar 

  36. M. López-Corredoira, H. Abedi, F. Garzón, and F. Figueras, Astron. Astrophys. 572, 101 (2014).

    Article  ADS  Google Scholar 

  37. M. Miyamoto and Z. Zhu, Astron. J. 115, 1483 (1998).

    Article  ADS  Google Scholar 

  38. K. F. Ogorodnikov, Dynamics of Stellar Systems (Pergamon, Oxford, 1965).

    MATH  Google Scholar 

  39. E.-M. Pauli, R. Napiwotzki, U. Heber, M. Altmann, and M. Odenkirchen, Astron. Astrophys. 447, 173 (2006).

    Article  ADS  Google Scholar 

  40. T. Prusti, J.H. J. de Bruijne, A.G. A. Brown, A. Vallenari, C. Babusiaux, C. A. L. Bailer-Jones, U. Bastian, M. Biermann, et al. (Gaia Collab.), Astron. Astrophys. 595, 1 (2016).

    Google Scholar 

  41. S. K. Randall, A. Calamida, G. Fontaine, M. Monelli, G. Bono, M. L. Alonso, V. Van Groote, P. Brassard, et al., Astron. Astrophys. 589, 1 (2016).

    Article  Google Scholar 

  42. A. S. Rastorguev, M. V. Zabolotskikh, A. K. Dambis, N. D. Utkin, V. V. Bobylev, and A. T. Bajkova, Astrophys. Bull. 72, 122 (2017).

    Article  ADS  Google Scholar 

  43. A. G. Riess, S. Casertano, W. Yuan, L. Macri, B. Bucciarelli, M. G. Lattanzi, J. W. MacKenty, J. B. Bowers, et al., Astrophys. J. 861, 126 (2018).

    Article  ADS  Google Scholar 

  44. M. Romero-Gómez, C. Mateu, L. Aguilar, F. Figueras, and A. Castro-Ginard, arXiv: 1812.07576 (2018).

    Google Scholar 

  45. N. Rowell and N. C. Hambly, Mon. Not. R. Astron. Soc. 417, 93 (2011).

    Article  ADS  Google Scholar 

  46. R. Schönrich, J. Binney, and W. Dehnen, Mon. Not. R. Astron. Soc. 403, 1829 (2010).

    Article  ADS  Google Scholar 

  47. L. Spitzer, Astrophys. J. 95, 329 (1942).

    Article  ADS  Google Scholar 

  48. K. G. Stassun and G. Torres, Astrophys. J. 862, 61 (2018).

    Article  ADS  Google Scholar 

  49. A. S. Tsvetkov and F. A. Amosov, Astron. Lett. 45, 46 (2019).

    Article  Google Scholar 

  50. J. P. Vallée, Astrophys. Space Sci. 362, 79 (2017).

    Article  ADS  Google Scholar 

  51. S. Vennes, R. J. Smith, B. J. Boyle, S. M. Croom, A. Kawka, T. Shanks, L. Miller, and N. Loaring, Mon. Not. R. Astron. Soc. 335, 673 (2002).

    Article  ADS  Google Scholar 

  52. V. V. Vityazev, A. S. Tsvetkov, V. V. Bobylev, and A. T. Baikova, Astrofizika 60, 503 (2017).

    Google Scholar 

  53. J. Vos, P. Németh, M. Vučković, R. Ostensen, and S. Parsons, Mon. Not. R. Astron. Soc. 473, 693 (2018).

    Article  ADS  Google Scholar 

  54. L. N. Yalyalieva, A. A. Chemel’, E. V. Glushkova, A. K. Dambis, and A. D. Klinichev, Astrophys. Bull. 73, 335 (2018).

    Article  ADS  Google Scholar 

  55. B. Yanny, C. Rockosi, H. J. Newberg, G. R. Knapp, J. K. Adelman-McCarthy, B. Alcorn, S. Allam, C. A. Prieto, et al., Astron. J. 137, 4377 (2009).

    Article  ADS  Google Scholar 

  56. J. C. Zinn, M. H. Pinsonneault, D. Huber, and D. Stello, arXiv: 1805.02650 (2018).

    Google Scholar 

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Acknowledgments

We are grateful to the referees for the useful remarks that contributed to an improvement of the paper.

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  1. Pulkovo Astronomical Observatory, Russian Academy of Sciences, Pulkovskoe sh. 65, St. Petersburg, 196140, Russia

    V. V. Bobylev & A. T. Bajkova

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Russian Text © The Author(s), 2019, published in Pis’ma v Astronomicheskii Zhurnal, 2019, Vol. 45, No. 9, pp. 622–635.

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Bobylev, V.V., Bajkova, A.T. Kinematics of Hot Subdwarfs from the Gaia DR2 Catalogue. Astron. Lett. 45, 580–592 (2019). https://doi.org/10.1134/S1063773719080012

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