Published July 19, 2023 | Version v1

B/PS bulges and barlenses from the kinematic viewpoint

  • 1. Max-Planck-Institut für extraterrestrische Physik, Gießenbachstraße, D-85748 Garching, Germany
  • 2. Dipartimento di Fisica e Astronomia "Galileo Galilei", Universita' degli studi di Padova, Vicolo dell'Osservatorio, 3, I-35122, Padova, Italy
  • 3. St. Petersburg State University, Universitetskij pr. 28, 198504 St. Petersburg, Stary Peterhof, Russia
  • 4. Central (Pulkovo) Astronomical Observatory of RAS, Pulkovskoye Chaussee 65/1, 196140 St. Petersburg, Russia

Description

Using a set of N-body models with different face-on bar morphology and edge-on B/PS bulges, we reproduce the kinematic features of barred galaxies seen in TIMER data.  We focus on a particular case of NGC 7755, match it with our model that displays the barlens morphology and find that due to contamination by non-vertical velocity components, different components of the galaxy falling on the same line of sight and other inclination effects, the line-of-sight velocity distribution stops being a reliable indicator of the vertical density distribution features, such as the  presence of the B/PS bulge. In addition, we observe the same ring of negative h4 parameter value minima independently of the presence of the barlens,  thus confirming the lack of connection between these two features.

Notes

The authors express gratitude for the financial support from the Russian Science Foundation (grant no. 22-22-00376).

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