Outputs (33)

WALLABY Pilot Survey and ASymba: Comparing H i Detection Asymmetries to the SIMBA Simulation (2025)
Journal Article
Perron-Cormier, M., Deg, N., Spekkens, K., Richardson, M. L. A., Glowacki, M., Oman, K. A., Verheijen, M. A. W., Hank, N. A. N., Blyth, S., Dénes, H., Rhee, J., Elagali, A., Shen, A. X., Raja, W., Lee-Waddell, K., Cortese, L., Catinella, B., & Westmeier, T. (2025). WALLABY Pilot Survey and ASymba: Comparing H i Detection Asymmetries to the SIMBA Simulation. Astronomical Journal, 169(2), Article 114. https://doi.org/10.3847/1538-3881/ada567

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... Read More about WALLABY Pilot Survey and ASymba: Comparing H i Detection Asymmetries to the SIMBA Simulation.

MHONGOOSE discovery of a gas-rich low surface brightness galaxy in the Dorado group (2024)
Journal Article
Maccagni, F. M., de Blok, W. J. G., Mancera Piña, P. E., Ragusa, R., Iodice, E., Spavone, M., McGaugh, S., Oman, K. A., Oosterloo, T. A., Koribalski, B. S., Kim, M., Adams, E. A. K., Amram, P., Bosma, A., Bigiel, F., Brinks, E., Chemin, L., Combes, F., Gibson, B., Healy, J., …Zijlstra, A. (2024). MHONGOOSE discovery of a gas-rich low surface brightness galaxy in the Dorado group. Astronomy & Astrophysics, 690, A69. https://doi.org/10.1051/0004-6361/202449441

We present the discovery of a low-mass, gas-rich low surface brightness galaxy in the Dorado group, at a distance of 17.7 Mpc. Combining deep MeerKAT 21-cm observations from the MeerKAT H I Observations of Nearby Galactic Objects: Observing Southern... Read More about MHONGOOSE discovery of a gas-rich low surface brightness galaxy in the Dorado group.

MHONGOOSE: A MeerKAT nearby galaxy H I survey (2024)
Journal Article
de Blok, W. J. G., Healy, J., Maccagni, F. M., Pisano, D. J., Bosma, A., English, J., Jarrett, T., Marasco, A., Meurer, G. R., Veronese, S., Bigiel, F., Chemin, L., Fraternali, F., Holwerda, B. W., Kamphuis, P., Klöckner, H. R., Kleiner, D., Leroy, A. K., Mogotsi, M., Oman, K. A., …Zijlstra, A. (2024). MHONGOOSE: A MeerKAT nearby galaxy H I survey. Astronomy & Astrophysics, 688, A109. https://doi.org/10.1051/0004-6361/202348297

The MHONGOOSE (MeerKAT H I Observations of Nearby Galactic Objects: Observing Southern Emitters) survey maps the distribution and kinematics of the neutral atomic hydrogen (H I) gas in and around 30 nearby star-forming spiral and dwarf galaxies to ex... Read More about MHONGOOSE: A MeerKAT nearby galaxy H I survey.

A warm dark matter cosmogony may yield more low-mass galaxy detections in 21-cm surveys than a cold dark matter one (2024)
Journal Article
Oman, K. A., Frenk, C. S., Crain, R. A., Lovell, M. R., & Pfeffer, J. (2024). A warm dark matter cosmogony may yield more low-mass galaxy detections in 21-cm surveys than a cold dark matter one. Monthly Notices of the Royal Astronomical Society, 533(1), 67-78. https://doi.org/10.1093/mnras/stae1772

The 21-cm spectral line widths, w50, of galaxies are an approximate tracer of their dynamical masses, such that the dark matter halo mass function is imprinted in the number density of galaxies as a function of w50. Correcting observed number counts... Read More about A warm dark matter cosmogony may yield more low-mass galaxy detections in 21-cm surveys than a cold dark matter one.

MARTINI: Mock Array Radio Telescope Interferometry ofthe Neutral ISM (2024)
Journal Article
Oman, K. A. (2024). MARTINI: Mock Array Radio Telescope Interferometry ofthe Neutral ISM. The Journal of Open Source Software, 9(98), Article 6860. https://doi.org/10.21105/joss.06860

MARTINI is a modular Python package that takes smoothed-particle hydrodynamics (SPH) simulations of galaxies as input and creates synthetic spatially- and/or spectrally-resolved observations of the 21-cm radio emission line of atomic hydrogen (data c... Read More about MARTINI: Mock Array Radio Telescope Interferometry ofthe Neutral ISM.

ARTEMIS emulator: exploring the effect of cosmology and galaxy formation physics on Milky Way-mass haloes and their satellites (2024)
Journal Article
Brown, S. T., Fattahi, A., McCarthy, I. G., Font, A. S., Oman, K. A., & Riley, A. H. (2024). ARTEMIS emulator: exploring the effect of cosmology and galaxy formation physics on Milky Way-mass haloes and their satellites. Monthly Notices of the Royal Astronomical Society, 532(2), 1223-1240. https://doi.org/10.1093/mnras/stae1378

We present the new ARTEMIS emulator suite of high-resolution (baryon mass of 2.23 × 104h−1 M⊙) zoom-in simulations of Milky Way-mass systems. Here, three haloes from the original ARTEMIS sample have been rerun multiple times, systematically varying p... Read More about ARTEMIS emulator: exploring the effect of cosmology and galaxy formation physics on Milky Way-mass haloes and their satellites.

An overlooked source of uncertainty in the mass of the Milky Way (2024)
Journal Article
Oman, K. A., & Riley, A. H. (2024). An overlooked source of uncertainty in the mass of the Milky Way. Monthly Notices of the Royal Astronomical Society: Letters, 532(1), L48-L55. https://doi.org/10.1093/mnrasl/slae042

Gas and Star Formation in Satellites of Milky Way Analogs (2024)
Journal Article
Jones, M. G., Sand, D. J., Karunakaran, A., Spekkens, K., Oman, K. A., Bennet, P., …Mutlu-Pakdil, B. (2024). Gas and Star Formation in Satellites of Milky Way Analogs. Astrophysical Journal, 966(1), Article 93. https://doi.org/10.3847/1538-4357/ad3076

We have imaged the entirety of eight (plus one partial) Milky Way (MW)–like satellite systems, a total of 42 (45) satellites, from the Satellites Around Galactic Analogs II catalog in both Hα and H i with the Canada–France–Hawaii Telescope and the Ja... Read More about Gas and Star Formation in Satellites of Milky Way Analogs.

Hydrodynamical simulations of merging galaxy clusters: giant dark matter particle colliders, powered by gravity (2024)
Journal Article
Sirks, E. L., Harvey, D., Massey, R., Oman, K. A., Robertson, A., Frenk, C., Everett, S., Gill, A. S., Lagattuta, D., & McCleary, J. (2024). Hydrodynamical simulations of merging galaxy clusters: giant dark matter particle colliders, powered by gravity. Monthly Notices of the Royal Astronomical Society, 530(3), 3160-3170. https://doi.org/10.1093/mnras/stae1012

Terrestrial particle accelerators collide charged particles, then watch the trajectory of outgoing debris – but they cannot manipulate dark matter. Fortunately, dark matter is the main component of galaxy clusters, which are continuously pulled toget... Read More about Hydrodynamical simulations of merging galaxy clusters: giant dark matter particle colliders, powered by gravity.

KURVS: the outer rotation curve shapes and dark matter fractions of z ∼ 1.5 star-forming galaxies (2023)
Journal Article
Puglisi, A., Dudzevičiūtė, U., Swinbank, M., Gillman, S., Tiley, A. L., Bower, R. G., …Sharples, R. M. (2023). KURVS: the outer rotation curve shapes and dark matter fractions of z ∼ 1.5 star-forming galaxies. Monthly Notices of the Royal Astronomical Society, 524(2), 2814-2835. https://doi.org/10.1093/mnras/stad1966

We present first results from the KMOS Ultra-deep Rotation Velocity Survey (KURVS), aimed at studying the outer rotation curves shape and dark matter content of 22 star-forming galaxies at z ∼1.5. These galaxies represent ’typical’ star-forming discs... Read More about KURVS: the outer rotation curve shapes and dark matter fractions of z ∼ 1.5 star-forming galaxies.