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Serbian Astronomical Journal

SPECIFIC ANGULAR MOMENTUM CORRELATION WITH THE NUMBER OF SATELLITES

Ana Lalović, Milena Jovanović, Sladjana Knežević, Srdjan Samurović.

PUBLICATIONS OF THE ASTRONOMICAL OBSERVATORY OF BELGRADE104, Page 67-72, https://doi.org/10.69646/aob104p067
PROCEEDINGS of the XX Serbian Astronomical Conference, Belgrade, October 16 - 20, 2023, Edited by Jelena Petrović, Dušan Marčeta and Ana Lalović
Published by: Astronomical Observatory, Volgina 7, 11060 Belgrade 38, Serbia
Published: 15. 12. 2024.

Abstract
Abstract. The number of satellites is correlated with the mass of the galaxy bulge and bulge-to-total ratio, indicating that the origin of satellites might be related to the mechanism responsible for bulge creation/growth. In this work, we have found that specific angular momentum correlates positively with the number of satellites for a sample of six nearby galaxies for which we have a complete census of the satellite population. Contrary to our previous work where we found a negative correlation using an approximate formula for specific angular momentum, in this work we have measured specific angular momentum more thoroughly: using both rotation curve data and galaxy mass distribution in the near infrared. Disagreement can be explained by the difference between approximate and more accurate measurements of angular momentum.
XX Serbian Astronomical Conference