3DMTO – a source-extraction tool for optical IFU datacubes with the prospect of detecting Ly𝛼 emitters in the WEAVE Cosmological Clusters Survey

Mooren, Filip van der (2024) 3DMTO – a source-extraction tool for optical IFU datacubes with the prospect of detecting Ly𝛼 emitters in the WEAVE Cosmological Clusters Survey. Master's Thesis / Essay, Astronomy.

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Abstract

Over the coming years, the new large integral field unit (LIFU) from the William Herschel telescope Enhanced Area Velocity Explorer (WEAVE) will facilitate the unbiased serendipitous discovery of Ly𝛼 emitters (LAEs) in addition to the primary science objectives. Specifically faint LAEs are probed through lensing by galaxy clusters, from which the LAE luminosity function can be constructed. To detect and extract the LAEs from 3D IFU datacubes, we developed 3DMTO by adapting the 2D source-extraction tool max-tree objects (MTObjects) to 3D optical (L)IFU data. We additionally compute descriptive attributes for each detection. To evaluate the performance of 3DMTO, we compare its detections with a catalog produced from the same datacube of the MUSE eXtremely Deep Field. 3DMTO achieves a purity of 97.75 % over the whole catalog, but only detects about ∼ 30 % of the LAEs through Ly𝛼. Moreover, 3DMTO fails to recover a significant fraction of the flux for the LAEs it does detect. We found that 3DMTO is robust in the sense that the attributes of a detection do not depend on the detection parameter, and Ly𝛼 has distinguishing attributes with respect to the total sample of detections. Nevertheless, in its current state, 3DMTO is not suitable for detecting or extracting LAEs from IFU data.

Item Type:	Thesis (Master's Thesis / Essay)
Supervisor name:	Trager, S.C. and Wilkinson, M.H.F.
Degree programme:	Astronomy
Thesis type:	Master's Thesis / Essay
Language:	English
Date Deposited:	28 Jun 2024 12:00
Last Modified:	05 Jul 2024 12:55
URI:	https://fse.studenttheses.ub.rug.nl/id/eprint/32837

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