Model independent approach for calculating galaxy rotation curves for low $S/N$ MaNGA galaxies
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arXiv
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| Main Authors: | , , , , , |
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| Format: | Preprint |
| Published: |
2024
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| _version_ | 1866910714978893824 |
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| author | Park, Sangwoo Shafieloo, Arman Bag, Satadru Denissenya, Mikhail Linder, Eric V. Ranjan, Adarsh |
| author_facet | Park, Sangwoo Shafieloo, Arman Bag, Satadru Denissenya, Mikhail Linder, Eric V. Ranjan, Adarsh |
| contents | 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 $S/N\approx 2$ using our method. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2404_16401 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Model independent approach for calculating galaxy rotation curves for low $S/N$ MaNGA galaxies Park, Sangwoo Shafieloo, Arman Bag, Satadru Denissenya, Mikhail Linder, Eric V. Ranjan, Adarsh Astrophysics of Galaxies Cosmology and Nongalactic Astrophysics 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 $S/N\approx 2$ using our method. |
| title | Model independent approach for calculating galaxy rotation curves for low $S/N$ MaNGA galaxies |
| topic | Astrophysics of Galaxies Cosmology and Nongalactic Astrophysics |
| url | https://arxiv.org/abs/2404.16401 |