Model independent approach for calculating galaxy rotation curves for low S/N MaNGA galaxies
Park S. Shafieloo A. Bag S. Denissenya M. Linder E.V. Ranjan A.
1 November 2024Institute of Physics
Journal of Cosmology and Astroparticle Physics
2024#2024Issue 11
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. Robust rotation curves can be derived down to S/N ≈ 2 using our method.
galaxy dynamics , rotation curves of galaxies , Statistical sampling techniques
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Korea Astronomy and Space Science Institute (KASI), 776 Daedeok-daero, Yuseong-gu, Daejeon, 34055, South Korea
KASI Campus, University of Science and Technology, 217 Gajeong-ro, Yuseong-gu, Daejeon, 34113, South Korea
Department of Physics, TUM School of Natural Sciences, Technical University of Munich, James-Franck-Straße 1, Garching, 85748, Germany
Max-Planck-Institut fur Astrophysik, Karl-Schwarzschild-Str. 1, Garching, 85748, Germany
Energetic Cosmos Laboratory, Nazarbayev University, Astana, 010000, Kazakhstan
Berkeley Center for Cosmological Physics, University of California, Berkeley, 94720, CA, United States
Lawrence Berkeley National Laboratory, Berkeley, 94720, CA, United States
Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, 21218, MD, United States
Korea Astronomy and Space Science Institute (KASI)
KASI Campus
Department of Physics
Max-Planck-Institut fur Astrophysik
Energetic Cosmos Laboratory
Berkeley Center for Cosmological Physics
Lawrence Berkeley National Laboratory
Space Telescope Science Institute
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