WALLABY Pilot Survey and ASymba: Comparing H i Detection Asymmetries to the SIMBA Simulation
An avenue for understanding cosmological galaxy formation is to compare morphometric parameters in observations and simulations of galaxy assembly. In this second paper of the ASymba: Asymmetries of H i in SIMBA Galaxies series, we measure atomic gas (H i ) asymmetries in spatially resolved detectio...
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| Language: | English |
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IOP Publishing
2025-01-01
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| Series: | The Astronomical Journal |
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| Online Access: | https://doi.org/10.3847/1538-3881/ada567 |
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| author | Mathieu Perron-Cormier Nathan Deg Kristine Spekkens Mark L. A. Richardson Marcin Glowacki Kyle A. Oman Marc A. W. Verheijen Nadine A. N. Hank Sarah Blyth Helga Dénes Jonghwan Rhee Ahmed Elagali Austin Xiaofan Shen Wasim Raja Karen Lee-Waddell Luca Cortese Barbara Catinella Tobias Westmeier |
| author_facet | Mathieu Perron-Cormier Nathan Deg Kristine Spekkens Mark L. A. Richardson Marcin Glowacki Kyle A. Oman Marc A. W. Verheijen Nadine A. N. Hank Sarah Blyth Helga Dénes Jonghwan Rhee Ahmed Elagali Austin Xiaofan Shen Wasim Raja Karen Lee-Waddell Luca Cortese Barbara Catinella Tobias Westmeier |
| author_sort | Mathieu Perron-Cormier |
| collection | DOAJ |
| description | An avenue for understanding cosmological galaxy formation is to compare morphometric parameters in observations and simulations of galaxy assembly. In this second paper of the ASymba: Asymmetries of H i in SIMBA Galaxies series, we measure atomic gas (H i ) asymmetries in spatially resolved detections from the untargeted Widefield ASKAP L -band Legacy All-sky Blind surveY (WALLABY) survey, and compare them to realizations of WALLABY-like mock samples from the SIMBA cosmological simulations. We develop a Scanline Tracing method to create mock galaxy H i data cubes that minimizes shot noise along the spectral dimension, compared to particle-based methods, and thus minimizes spurious asymmetry contributions. We compute 1D and 3D asymmetries for spatially resolved WALLABY Pilot Survey detections, and we find that the highest 3D asymmetries ( A _3D ≳ 0.5) stem from interacting systems or detections with strong bridges or tails. We then construct a series of WALLABY-like mock realizations drawn from the SIMBA 50 Mpc simulation volume and compare their asymmetry distributions. We find that the incidence of high A _3D detections is higher in WALLABY than in the SIMBA mocks, but that difference is not statistically significant ( p -value = 0.05). The statistical power of quantitative comparisons of asymmetries such as the one presented here will improve as the WALLABY survey progresses and as simulation volumes and resolutions increase. |
| format | Article |
| id | doaj-art-dfa27b13edd54495af777dbc4127aa54 |
| institution | Kabale University |
| issn | 1538-3881 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | The Astronomical Journal |
| spelling | doaj-art-dfa27b13edd54495af777dbc4127aa542025-02-04T15:14:32ZengIOP PublishingThe Astronomical Journal1538-38812025-01-01169211410.3847/1538-3881/ada567WALLABY Pilot Survey and ASymba: Comparing H i Detection Asymmetries to the SIMBA SimulationMathieu Perron-Cormier0Nathan Deg1https://orcid.org/0000-0003-3523-7633Kristine Spekkens2https://orcid.org/0000-0002-0956-7949Mark L. A. Richardson3Marcin Glowacki4https://orcid.org/0000-0002-5067-8894Kyle A. Oman5https://orcid.org/0000-0001-9857-7788Marc A. W. Verheijen6https://orcid.org/0000-0001-9022-8081Nadine A. N. Hank7Sarah Blyth8Helga Dénes9https://orcid.org/0000-0002-9214-8613Jonghwan Rhee10https://orcid.org/0000-0001-8496-4306Ahmed Elagali11Austin Xiaofan Shen12Wasim Raja13Karen Lee-Waddell14Luca Cortese15https://orcid.org/0000-0002-7422-9823Barbara Catinella16https://orcid.org/0000-0002-7625-562XTobias Westmeier17Department of Physics, Engineering Physics, and Astronomy, Queen’s University, Kingston , ON, K7L 3N6, Canada ; matpcormier@gmail.comDepartment of Physics, Engineering Physics, and Astronomy, Queen’s University, Kingston , ON, K7L 3N6, Canada ; matpcormier@gmail.comDepartment of Physics, Engineering Physics, and Astronomy, Queen’s University, Kingston , ON, K7L 3N6, Canada ; matpcormier@gmail.comDepartment of Physics, Engineering Physics, and Astronomy, Queen’s University, Kingston , ON, K7L 3N6, Canada ; matpcormier@gmail.com; Arthur B. McDonald Canadian Astroparticle Physics Research Institute , 64 Bader Lane, Kingston, ON, K7L 3N6, CanadaInstitute for Astronomy, University of Edinburgh , Royal Observatory, Edinburgh, EH9 3HJ, UK; International Centre for Radio Astronomy Research, Curtin University , Bentley, WA 6102, Australia; Inter-University Institute for Data Intensive Astronomy, Department of Astronomy, University of Cape Town , Cape Town, South AfricaInstitute for Computational Cosmology, Physics Department, Durham University , South Road, Durham DH1 3LE, UK; Centre for Extragalactic Astronomy, Physics Department, Durham University , South Road, Durham DH1 3LE, UKKapteyn Astronomical Institute, University of Groningen , Landleven 12, 9747 AD Groningen, the NetherlandsKapteyn Astronomical Institute, University of Groningen , Landleven 12, 9747 AD Groningen, the NetherlandsDepartment of Astronomy, University of Cape Town , Private Bag X3, Rondebosch 7701, South AfricaSchool of Physical Sciences and Nanotechnology, Yachay Tech University , Hacienda San José S/N, 100119, Urcuquí, EcuadorInternational Centre for Radio Astronomy Research (ICRAR), University of Western Australia , 35 Stirling Hwy, Crawley, WA 6009, AustraliaSchool of Biological Sciences, The University of Western Australia , Crawley, Western Australia, AustraliaCSIRO , Space and Astronomy, P.O. Box 1130, Bentley, WA 6102, AustraliaCSIRO , Space and Astronomy, P.O. Box 1130, Bentley, WA 6102, AustraliaInternational Centre for Radio Astronomy Research (ICRAR), University of Western Australia , 35 Stirling Hwy, Crawley, WA 6009, Australia; CSIRO , Space and Astronomy, P.O. Box 1130, Bentley, WA 6102, Australia; Australian SKA Regional Centre (AusSRC)—The University of Western Australia , 35 Stirling Highway, Crawley WA 6009, AustraliaInternational Centre for Radio Astronomy Research (ICRAR), University of Western Australia , 35 Stirling Hwy, Crawley, WA 6009, AustraliaInternational Centre for Radio Astronomy Research (ICRAR), University of Western Australia , 35 Stirling Hwy, Crawley, WA 6009, Australia; Australia. ARC Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D) , AustraliaInternational Centre for Radio Astronomy Research (ICRAR), University of Western Australia , 35 Stirling Hwy, Crawley, WA 6009, AustraliaAn avenue for understanding cosmological galaxy formation is to compare morphometric parameters in observations and simulations of galaxy assembly. In this second paper of the ASymba: Asymmetries of H i in SIMBA Galaxies series, we measure atomic gas (H i ) asymmetries in spatially resolved detections from the untargeted Widefield ASKAP L -band Legacy All-sky Blind surveY (WALLABY) survey, and compare them to realizations of WALLABY-like mock samples from the SIMBA cosmological simulations. We develop a Scanline Tracing method to create mock galaxy H i data cubes that minimizes shot noise along the spectral dimension, compared to particle-based methods, and thus minimizes spurious asymmetry contributions. We compute 1D and 3D asymmetries for spatially resolved WALLABY Pilot Survey detections, and we find that the highest 3D asymmetries ( A _3D ≳ 0.5) stem from interacting systems or detections with strong bridges or tails. We then construct a series of WALLABY-like mock realizations drawn from the SIMBA 50 Mpc simulation volume and compare their asymmetry distributions. We find that the incidence of high A _3D detections is higher in WALLABY than in the SIMBA mocks, but that difference is not statistically significant ( p -value = 0.05). The statistical power of quantitative comparisons of asymmetries such as the one presented here will improve as the WALLABY survey progresses and as simulation volumes and resolutions increase.https://doi.org/10.3847/1538-3881/ada567Galaxy structureH I line emissionHydrodynamical simulations |
| spellingShingle | Mathieu Perron-Cormier Nathan Deg Kristine Spekkens Mark L. A. Richardson Marcin Glowacki Kyle A. Oman Marc A. W. Verheijen Nadine A. N. Hank Sarah Blyth Helga Dénes Jonghwan Rhee Ahmed Elagali Austin Xiaofan Shen Wasim Raja Karen Lee-Waddell Luca Cortese Barbara Catinella Tobias Westmeier WALLABY Pilot Survey and ASymba: Comparing H i Detection Asymmetries to the SIMBA Simulation The Astronomical Journal Galaxy structure H I line emission Hydrodynamical simulations |
| title | WALLABY Pilot Survey and ASymba: Comparing H i Detection Asymmetries to the SIMBA Simulation |
| title_full | WALLABY Pilot Survey and ASymba: Comparing H i Detection Asymmetries to the SIMBA Simulation |
| title_fullStr | WALLABY Pilot Survey and ASymba: Comparing H i Detection Asymmetries to the SIMBA Simulation |
| title_full_unstemmed | WALLABY Pilot Survey and ASymba: Comparing H i Detection Asymmetries to the SIMBA Simulation |
| title_short | WALLABY Pilot Survey and ASymba: Comparing H i Detection Asymmetries to the SIMBA Simulation |
| title_sort | wallaby pilot survey and asymba comparing h i detection asymmetries to the simba simulation |
| topic | Galaxy structure H I line emission Hydrodynamical simulations |
| url | https://doi.org/10.3847/1538-3881/ada567 |
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