Model independent approach for calculating galaxy rotation curves for low $S/N$ MaNGA galaxies

Model independent approach for calculating galaxy rotation curves for low $S/N$ MaNGA galaxies
Sangwoo Park, Arman Shafieloo, Satadru Bag, Mikhail Denissenya, Eric V. Linder, Adarsh Ranjan
arXiv:2404.16401v1 Announce Type: new
Abstract: Internal kinematics of galaxies, traced through the stellar rotation curve or two dimensional velocity map, carry important information on galactic structure and dark matter. With upcoming surveys, the velocity map may play a key role in the development of kinematic lensing as an astrophysical probe. We improve techniques for extracting velocity information from integral field spectroscopy at low signal-to-noise ($S/N$), without a template, and demonstrate substantial advantages over the standard Penalized PiXel-Fitting method (pPXF) approach. We note that Robust rotation curves can be derived down to $S/Napprox 2$ using our method.arXiv:2404.16401v1 Announce Type: new
Abstract: Internal kinematics of galaxies, traced through the stellar rotation curve or two dimensional velocity map, carry important information on galactic structure and dark matter. With upcoming surveys, the velocity map may play a key role in the development of kinematic lensing as an astrophysical probe. We improve techniques for extracting velocity information from integral field spectroscopy at low signal-to-noise ($S/N$), without a template, and demonstrate substantial advantages over the standard Penalized PiXel-Fitting method (pPXF) approach. We note that Robust rotation curves can be derived down to $S/Napprox 2$ using our method.