MIGHTEE–HI: H i catalogue of 293 sources for the COSMOS field and comparative study of 3-dimensional source finding methods

Michalina Maksymowicz-Maciata; Natasha Maddox; Catherine Hale; Ben Maughan; Matt J Jarvis; Anastasia A Ponomareva; Ian Heywood; Hengxing Pan; Sushma Kurapati; Tom G Hardy; Marcin Glowacki; Tobias Westmeier; Maarten Baes; Seoyoung Lyla Jung; Andreea A Vărăşteanu

doi:10.1093/mnras/stag1091

MIGHTEE–HI: H i catalogue of 293 sources for the COSMOS field and comparative study of 3-dimensional source finding methods

Michalina Maksymowicz-Maciata
, Natasha Maddox
, Catherine Hale
, Ben Maughan
, Matt J Jarvis
, Anastasia A Ponomareva
, Ian Heywood
, Hengxing Pan
, Sushma Kurapati
, Tom G Hardy
, Marcin Glowacki
, Tobias Westmeier
, Maarten Baes
, Seoyoung Lyla Jung
, Andreea A Vărăşteanu

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Abstract

We present a catalogue of H i sources extracted from the MIGHTEE survey data cubes covering the COSMOS field. The catalogue contains 293 sources in the redshift range of . In addition to H i masses and velocity widths, the catalogue includes optical through near-infrared photometry and inferred stellar masses and star-formation rates. The quantity of sources in the H i catalogue acquired through untargeted source finding is greatly influenced by the source finding methods used. This study therefore also provides a well-characterized expected completeness of the detected sample of galaxies based on their properties, informing of any detection biases, inferred through a comparative study of different source finding algorithms. We have tested the performance of widely-used source finders: pybdsf, profound, and sofia, along with new source finder leshi, focusing exclusively on H i source detection rather than source characterization in the first instance. The source finders were tested by injecting a sample of simulated galaxies divided into narrow bins of mass, inclination and distance into a MeerKAT data cube. The results inform the source finding strategies for the MeerKAT International GigaHertz Tiered Extragalactic Exploration (MIGHTEE) survey, as well as upcoming SKAO surveys.

Original language	English
Number of pages	29
Journal	Monthly Notices of the Royal Astronomical Society
Volume	550
Issue number	1
Early online date	12 Jun 2026
DOIs	https://doi.org/10.1093/mnras/stag1091
Publication status	Published - 31 Jul 2026

Keywords

galaxies: abundances
software: data analysis
catalogues
methods: observational
radio lines: galaxies

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10.1093/mnras/stag1091Licence: CC BY

Final_versionFinal published version, 8.02 MBLicence: CC BY

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Maksymowicz-Maciata, M., Maddox, N., Hale, C., Maughan, B., Jarvis, M. J., Ponomareva, A. A., Heywood, I., Pan, H., Kurapati, S., Hardy, T. G., Glowacki, M., Westmeier, T., Baes, M., Jung, S. L., & Vărăşteanu, A. A. (2026). MIGHTEE–HI: H i catalogue of 293 sources for the COSMOS field and comparative study of 3-dimensional source finding methods. Monthly Notices of the Royal Astronomical Society, 550(1). https://doi.org/10.1093/mnras/stag1091

@article{cf33c608c54541919bb050e161cd3e81,

title = "MIGHTEE–HI: H i catalogue of 293 sources for the COSMOS field and comparative study of 3-dimensional source finding methods",

abstract = "We present a catalogue of H i sources extracted from the MIGHTEE survey data cubes covering the COSMOS field. The catalogue contains 293 sources in the redshift range of . In addition to H i masses and velocity widths, the catalogue includes optical through near-infrared photometry and inferred stellar masses and star-formation rates. The quantity of sources in the H i catalogue acquired through untargeted source finding is greatly influenced by the source finding methods used. This study therefore also provides a well-characterized expected completeness of the detected sample of galaxies based on their properties, informing of any detection biases, inferred through a comparative study of different source finding algorithms. We have tested the performance of widely-used source finders: pybdsf, profound, and sofia, along with new source finder leshi, focusing exclusively on H i source detection rather than source characterization in the first instance. The source finders were tested by injecting a sample of simulated galaxies divided into narrow bins of mass, inclination and distance into a MeerKAT data cube. The results inform the source finding strategies for the MeerKAT International GigaHertz Tiered Extragalactic Exploration (MIGHTEE) survey, as well as upcoming SKAO surveys.",

keywords = "galaxies: abundances, software: data analysis, catalogues, methods: observational, radio lines: galaxies",

author = "Michalina Maksymowicz-Maciata and Natasha Maddox and Catherine Hale and Ben Maughan and Jarvis, \{Matt J\} and Ponomareva, \{Anastasia A\} and Ian Heywood and Hengxing Pan and Sushma Kurapati and Hardy, \{Tom G\} and Marcin Glowacki and Tobias Westmeier and Maarten Baes and Jung, \{Seoyoung Lyla\} and V{\u a}r{\u a}{\c s}teanu, \{Andreea A\}",

note = "{\textcopyright} The Author(s) 2026. Published by Oxford University Press on behalf of Royal Astronomical Society. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/).",

year = "2026",

month = jul,

day = "31",

doi = "10.1093/mnras/stag1091",

language = "English",

volume = "550",

journal = "Monthly Notices of the Royal Astronomical Society",

issn = "0035-8711",

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Maksymowicz-Maciata, M, Maddox, N, Hale, C, Maughan, B, Jarvis, MJ, Ponomareva, AA, Heywood, I, Pan, H, Kurapati, S, Hardy, TG, Glowacki, M, Westmeier, T, Baes, M, Jung, SL & Vărăşteanu, AA 2026, 'MIGHTEE–HI: H i catalogue of 293 sources for the COSMOS field and comparative study of 3-dimensional source finding methods', Monthly Notices of the Royal Astronomical Society, vol. 550, no. 1. https://doi.org/10.1093/mnras/stag1091

TY - JOUR

T1 - MIGHTEE–HI: H i catalogue of 293 sources for the COSMOS field and comparative study of 3-dimensional source finding methods

AU - Maksymowicz-Maciata, Michalina

AU - Maddox, Natasha

AU - Hale, Catherine

AU - Maughan, Ben

AU - Jarvis, Matt J

AU - Ponomareva, Anastasia A

AU - Heywood, Ian

AU - Pan, Hengxing

AU - Kurapati, Sushma

AU - Hardy, Tom G

AU - Glowacki, Marcin

AU - Westmeier, Tobias

AU - Baes, Maarten

AU - Jung, Seoyoung Lyla

AU - Vărăşteanu, Andreea A

N1 - © The Author(s) 2026. Published by Oxford University Press on behalf of Royal Astronomical Society. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/).

PY - 2026/7/31

Y1 - 2026/7/31

N2 - We present a catalogue of H i sources extracted from the MIGHTEE survey data cubes covering the COSMOS field. The catalogue contains 293 sources in the redshift range of . In addition to H i masses and velocity widths, the catalogue includes optical through near-infrared photometry and inferred stellar masses and star-formation rates. The quantity of sources in the H i catalogue acquired through untargeted source finding is greatly influenced by the source finding methods used. This study therefore also provides a well-characterized expected completeness of the detected sample of galaxies based on their properties, informing of any detection biases, inferred through a comparative study of different source finding algorithms. We have tested the performance of widely-used source finders: pybdsf, profound, and sofia, along with new source finder leshi, focusing exclusively on H i source detection rather than source characterization in the first instance. The source finders were tested by injecting a sample of simulated galaxies divided into narrow bins of mass, inclination and distance into a MeerKAT data cube. The results inform the source finding strategies for the MeerKAT International GigaHertz Tiered Extragalactic Exploration (MIGHTEE) survey, as well as upcoming SKAO surveys.

AB - We present a catalogue of H i sources extracted from the MIGHTEE survey data cubes covering the COSMOS field. The catalogue contains 293 sources in the redshift range of . In addition to H i masses and velocity widths, the catalogue includes optical through near-infrared photometry and inferred stellar masses and star-formation rates. The quantity of sources in the H i catalogue acquired through untargeted source finding is greatly influenced by the source finding methods used. This study therefore also provides a well-characterized expected completeness of the detected sample of galaxies based on their properties, informing of any detection biases, inferred through a comparative study of different source finding algorithms. We have tested the performance of widely-used source finders: pybdsf, profound, and sofia, along with new source finder leshi, focusing exclusively on H i source detection rather than source characterization in the first instance. The source finders were tested by injecting a sample of simulated galaxies divided into narrow bins of mass, inclination and distance into a MeerKAT data cube. The results inform the source finding strategies for the MeerKAT International GigaHertz Tiered Extragalactic Exploration (MIGHTEE) survey, as well as upcoming SKAO surveys.

KW - galaxies: abundances

KW - software: data analysis

KW - catalogues

KW - methods: observational

KW - radio lines: galaxies

U2 - 10.1093/mnras/stag1091

DO - 10.1093/mnras/stag1091

M3 - Article

SN - 0035-8711

VL - 550

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

IS - 1

ER -

MIGHTEE–HI: H i catalogue of 293 sources for the COSMOS field and comparative study of 3-dimensional source finding methods

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Keywords

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