Truncated stellar discs in the near infrared. II. Statistical properties and interpretation

Abstract

The results obtained in paper I are used to study possible relationships between the truncation radius of stellar discs in the NIR and structural parameters of the galaxies. The NIR truncation radius is larger for brighter galaxies, being proportional to $V_m^c$ with $c\approx 3/2$, and with $V_m$ being the asymptotic rotation velocity at large radii (when the rotation curve becomes flat), and is lower for higher wavelengths. When it is normalized to the scalelength, the truncation is an increasing function of the central surface brightness and is lower for late type galaxies, although these correlations are weaker. These relations are in agreement with the scenario of magnetically driven truncations.

arXiv comment6 pages. Published in Astronomy & Astrophysics

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Cited by in corpus (4)

• Antitruncated Stellar Disks via Minor Mergers
• Breaks in thin and thick discs of edge-on galaxies imaged in the Spitzer Survey of Stellar Structure in Galaxies (S4G)
• Truncations of stellar disk and warps of HI-layers in edge-on spiral galaxies
• Structural and photometric properties of barred galaxies from the Auriga cosmological simulations