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Polar-bulge galaxies

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Abstract

Based on SDSS data, we have selected a sample of nine edge-on spiral galaxies with bulges whose major axes show a high inclination to the disk plane. Such objects are called polar-bulge galaxies. They are similar in their morphology to polar-ring galaxies, but the central objects in them have small sizes and low luminosities. We have performed a photometric analysis of the galaxies in the g and r bands and determined the main characteristics of their bulges and disks. We show that the disks of such galaxies are typical for the disks of spiral galaxies of late morphological types; the integrated characteristics of their bulges are similar to the parameters of normal bulges. The stellar disks of polar-bulge galaxies often show large-scale warps, which can be explained by their interaction with neighboring galaxies or external accretion from outside.

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Authors and Affiliations

  1. St. Petersburg State University, Universitetskii pr. 28, St. Petersburg, Peterhof, 198504, Russia

    V. P. Reshetnikov, S. S. Savchenko, A. V. Mosenkov & N. Ya. Sotnikova

  2. Ghent University, Sint-Pietersnieuwstraat 33, Ghent, B-9000, Belgium

    A. V. Mosenkov

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

    A. V. Mosenkov

  4. Apache Point Observatory and New Mexico State University, 2001 Apache Point Road, P. O. Box 59, Sunspot, NM, 88349-0059, USA

    D. V. Bizyaev

  5. Sternberg Astronomical Institute, Moscow State University, Universitetskii pr. 13, Moscow, 119991, Russia

    D. V. Bizyaev

Authors
  1. V. P. Reshetnikov
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  2. S. S. Savchenko
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  3. A. V. Mosenkov
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  4. N. Ya. Sotnikova
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  5. D. V. Bizyaev
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Correspondence to V. P. Reshetnikov.

Additional information

Original Russian Text © V.P. Reshetnikov, S.S. Savchenko, A.V. Mosenkov, N.Ya. Sotnikova, D.V. Bizyaev, 2015, published in Pis’ma v Astronomicheskiǐ Zhurnal, 2015, Vol. 41, No. 12, pp. 808–817.

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Reshetnikov, V.P., Savchenko, S.S., Mosenkov, A.V. et al. Polar-bulge galaxies. Astron. Lett. 41, 748–756 (2015). https://doi.org/10.1134/S1063773715120117

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  • DOI: https://doi.org/10.1134/S1063773715120117

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