Speaker
Description
We present a unified study of the baryonic Faber–Jackson relation (BFJR) and the fundamental plane (FP) for pressure-supported systems spanning eight orders of magnitude in baryonic mass, from dwarf spheroidals to galaxy groups. Using a homogenized sample of about 1400 systems, we show that both relations depend systematically on the mean internal baryonic acceleration, with a transition around a characteristic small acceleration scale. High-acceleration systems, corresponding to massive ellipticals, follow the Newtonian FP, while low-acceleration systems deviate from it and instead define a remarkably tight BFJR. In this regime, dwarf galaxies and galaxy groups exhibit an intrinsic scatter of approximately 0.1 dex. These results indicate that the FP and the BFJR probe different dynamical regimes, offering a unified view of pressure-supported systems across a wide range of scales.
| Participate the oral/poster presentation award competition | No |
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