Resolving star-forming clumps in a z similar to 2 lensed galaxy: a pixelated Bayesian approach

Soniya Sharma; Johan Richard; Tiantian Yuan; Vera Patricio; Lisa Kewley; Jane R. Rigby; Anshu Gupta; Nicha Leethochawalit

doi:10.1093/mnrasl/slab040

Resolving star-forming clumps in a z similar to 2 lensed galaxy: a pixelated Bayesian approach

Soniya Sharma, Johan Richard, Tiantian Yuan, Vera Patricio, Lisa Kewley, Jane R. Rigby, Anshu Gupta, Nicha Leethochawalit

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Research output: Contribution to journal › Journal article › Research › peer-review

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Abstract

We present a pixelized source reconstruction method applied on integral field spectroscopic observations of gravitationally lensed galaxies. We demonstrate the effectiveness of this method in a case study on the clumpy morphology of a z similar to 2 lensed galaxy behind a group-scale lens. We use a Bayesian forward source modelling approach to reconstruct the surface brightness distribution of the source galaxy on a uniformly pixelized grid while accounting for the image point spread function. The pixelated approach is sensitive to clump sizes down to 100 pc and resolves smaller clump sizes with an improvement in the signal-to-noise ratio by almost a factor of 10 compared with more traditional ray-tracing approaches.

Original language	English
Journal	Monthly Notices of the Royal Astronomical Society
Volume	505
Issue number	1
Pages (from-to)	L1-L5
Number of pages	5
ISSN	0035-8711
DOIs	https://doi.org/10.1093/mnrasl/slab040
Publication status	Published - 1 Jul 2021

Keywords

gravitational lensing: strong
galaxies: evolution
galaxies: high-redshift
SPECTROSCOPY
FIELDS
RECONSTRUCTION
SCALES
MODEL
MASS

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10.1093/mnrasl/slab040

slab040Final published version, 1.64 MB

Cite this

Resolving star-forming clumps in a z similar to 2 lensed galaxy : a pixelated Bayesian approach. / Sharma, Soniya; Richard, Johan; Yuan, Tiantian; Patricio, Vera; Kewley, Lisa; Rigby, Jane R.; Gupta, Anshu; Leethochawalit, Nicha.

In: Monthly Notices of the Royal Astronomical Society, Vol. 505, No. 1, 01.07.2021, p. L1-L5.

Research output: Contribution to journal › Journal article › Research › peer-review

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AU - Kewley, Lisa

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AU - Gupta, Anshu

AU - Leethochawalit, Nicha

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