Implications for the Origin of Early-type Dwarf Galaxies: A Detailed Look at the Isolated Rotating Early-type Dwarf Galaxy LEDA 2108986 (CG 611), Ramifications for the Fundamental Plane's S-K(2) Kinematic Scaling, and the Spin-Ellipticity Diagram
ASTROPHYSICAL JOURNAL 840:2 (2017) ARTN 68
Systematic trends in total mass profiles from dynamical models of early-type galaxies
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 467:2 (2017) 1397-1413
Untangling galaxy components: full spectral bulge鈥揹isc decomposition
Monthly Notices of the Royal Astronomical Society 466:2 (2017) 2024-2033
SDSS-IV MaNGA: variation of the stellar initial mass function in spiral and early-type galaxies
Astrophysical Journal IOP Publishing 838:2 (2017)
Abstract:
We perform Jeans anisotropic modeling (JAM) on elliptical and spiral galaxies from the MaNGA DR13 sample. By comparing the stellar mass-to-light ratios estimated from stellar population synthesis and from JAM, we find a systematic variation of the initial mass function (IMF) similar to that in the earlier ${\mathrm{ATLAS}}^{3{\rm{D}}}$ results. Early-type galaxies (elliptical and lenticular) with lower velocity dispersions within one effective radius are consistent with a Chabrier-like IMF, while galaxies with higher velocity dispersions are consistent with a more bottom-heavy IMF such as the Salpeter IMF. Spiral galaxies have similar systematic IMF variations, but with slightly different slopes and larger scatters, due to the uncertainties caused by the higher gas fractions and extinctions for these galaxies. Furthermore, we examine the effects of stellar mass-to-light ratio gradients on our JAM modeling, and we find that the trends become stronger after considering the gradients.WISDOM Project - I: Black Hole Mass Measurement Using Molecular Gas Kinematics in NGC 3665
(2017)