The Planet-Metallicity Correlation for Transiting Brown Dwarfs
Title
The Planet-Metallicity Correlation for Transiting Brown Dwarfs
Subject
Physics
Creator
Vaughn Totterdill
Date
2025
Abstract
The brown dwarf metallicity correlation was investigated for a set of 48 transiting brown dwarfs, taken from wide field surveys. Host star metallicity was compared to field stars using the Besançon galaxy model, with a metallicity offset between the sets found. Quantifying this using a power law the correlation constant was found to be B= 1.08+0.58 −0.52. Limiting the sample to those brown dwarfs below 42.5 MJ and above 42.5 MJ the correlation constants were found to be B= 1.44+0.87 −0.79 and B= 0.95+0.66 −0.54 respectively. This suggests the population of brown dwarfs with masses below 42.5 MJ form via core accretion whereas those with masses above 42.5 MJ form via gravitational collapse.
Files
Collection
Citation
Vaughn Totterdill, “The Planet-Metallicity Correlation for Transiting Brown Dwarfs,” URSS SHOWCASE, accessed November 2, 2025, https://linen-dog.lnx.warwick.ac.uk/items/show/949.