Photometry and Blends: The Rubin Photo-z Challenges
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2022
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| _version_ | 1866902290623889408 |
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| author | Liang, Shuang |
| author_facet | Liang, Shuang |
| contents | <p>Weak Gravitational Lensing is a powerful probe for cosmology, and is one of the main goals for the Vera C. Rubin Observatory’s Legacy Survey of Space and Time (LSST). LSST will observe ∼ 10<sup>10</sup> galaxies and measure their redshifts with broad-band photometry (photometric redshift; photo-z). This dissertation consists of three projects dedicated to improve LSST systematic uncertainties including photo-z measurements:</p> <p>1. improve photometric calibration of <em>u</em>-band imaging;</p> <p>2. identify overlapping galaxies (blends) with machine learning;</p> <p>3. quantify the impact of blends in galaxy clusters on photo-z.</p> <p>Motivated by the photo-z challenges of Rubin-LSST, this work also has applications beyond photo-z or Rubin (e.g. cluster cosmology, galaxy shape measurements, Milky Way structure, or any optical observation with deep <em>u</em>-band imaging).</p> |
| format | Recurso digital |
| id | zenodo_https___doi_org_10_5281_zenodo_7072856 |
| institution | Zenodo |
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| publishDate | 2022 |
| publisher | Zenodo |
| record_format | zenodo |
| spellingShingle | Photometry and Blends: The Rubin Photo-z Challenges Liang, Shuang Weak gravitational lensing <p>Weak Gravitational Lensing is a powerful probe for cosmology, and is one of the main goals for the Vera C. Rubin Observatory’s Legacy Survey of Space and Time (LSST). LSST will observe ∼ 10<sup>10</sup> galaxies and measure their redshifts with broad-band photometry (photometric redshift; photo-z). This dissertation consists of three projects dedicated to improve LSST systematic uncertainties including photo-z measurements:</p> <p>1. improve photometric calibration of <em>u</em>-band imaging;</p> <p>2. identify overlapping galaxies (blends) with machine learning;</p> <p>3. quantify the impact of blends in galaxy clusters on photo-z.</p> <p>Motivated by the photo-z challenges of Rubin-LSST, this work also has applications beyond photo-z or Rubin (e.g. cluster cosmology, galaxy shape measurements, Milky Way structure, or any optical observation with deep <em>u</em>-band imaging).</p> |
| title | Photometry and Blends: The Rubin Photo-z Challenges |
| topic | Weak gravitational lensing |
| url | https://doi.org/10.5281/zenodo.7072856 |