MIGHTEE-H i: the H i size-mass relation over the last billion years
We present the observed H i size-mass relation of 204 galaxies from the MIGHTEE Survey Early Science data. The high sensitivity of MeerKAT allows us to detect galaxies spanning more than 4 orders of magnitude in H i mass, ranging from dwarf galaxies to massive spirals, and including all morphologica...
| Main Authors: | , , , , , , , , , , , , , , , , , |
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| Format: | Journal Article |
| Language: | English |
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OXFORD UNIV PRESS
2022
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| Online Access: | http://purl.org/au-research/grants/arc/DP210102103 http://hdl.handle.net/20.500.11937/90259 |
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| author | Rajohnson, S.H.A. Frank, B.S. Ponomare, A.A. Maddox, N. Kraan-Korteweg, R.C. Jarvis, M.J. Adams, E.A.K. Oosterloo, T. Baes, M. Spekkens, K. Adams, N.J. Glowacki, Marcin Kurapati, S. Prandoni, I. Heywood, I. Collier, J.D. Sekhar, S. Taylor, R. |
| author_facet | Rajohnson, S.H.A. Frank, B.S. Ponomare, A.A. Maddox, N. Kraan-Korteweg, R.C. Jarvis, M.J. Adams, E.A.K. Oosterloo, T. Baes, M. Spekkens, K. Adams, N.J. Glowacki, Marcin Kurapati, S. Prandoni, I. Heywood, I. Collier, J.D. Sekhar, S. Taylor, R. |
| author_sort | Rajohnson, S.H.A. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | We present the observed H i size-mass relation of 204 galaxies from the MIGHTEE Survey Early Science data. The high sensitivity of MeerKAT allows us to detect galaxies spanning more than 4 orders of magnitude in H i mass, ranging from dwarf galaxies to massive spirals, and including all morphological types. This is the first time the relation has been explored on a blind homogeneous data set that extends over a previously unexplored redshift range of 0 < z < 0.084, i.e. a period of around one billion years in cosmic time. The sample follows the same tight logarithmic relation derived from previous work, between the diameter (DHI) and the mass (MHI) of H i discs. We measure a slope of 0.501 ± 0.008, an intercept of -3.252+0.073-0.074, and an observed scatter of 0.057 dex. For the first time, we quantify the intrinsic scatter of 0.054 ± 0.003 dex (∼10 percent), which provides a constraint for cosmological simulations of galaxy formation and evolution. We derive the relation as a function of galaxy type and find that their intrinsic scatters and slopes are consistent within the errors. We also calculate the DHI-MHI relation for two redshift bins and do not find any evidence for evolution with redshift. These results suggest that over a period of one billion years in look-back time, galaxy discs have not undergone significant evolution in their gas distribution and mean surface mass density, indicating a lack of dependence on both morphological type and redshift. |
| first_indexed | 2025-11-14T11:33:59Z |
| format | Journal Article |
| id | curtin-20.500.11937-90259 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-14T11:33:59Z |
| publishDate | 2022 |
| publisher | OXFORD UNIV PRESS |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-902592023-02-24T07:32:44Z MIGHTEE-H i: the H i size-mass relation over the last billion years Rajohnson, S.H.A. Frank, B.S. Ponomare, A.A. Maddox, N. Kraan-Korteweg, R.C. Jarvis, M.J. Adams, E.A.K. Oosterloo, T. Baes, M. Spekkens, K. Adams, N.J. Glowacki, Marcin Kurapati, S. Prandoni, I. Heywood, I. Collier, J.D. Sekhar, S. Taylor, R. Science & Technology Physical Sciences Astronomy & Astrophysics surveys galaxies: evolution galaxies: kinematics and dynamics radio lines: galaxies TULLY-FISHER RELATION IRREGULAR GALAXIES STELLAR MASS ATOMIC GAS EVOLUTION ORIGIN ENVIRONMENT MORPHOLOGY ACCRETION PROJECT We present the observed H i size-mass relation of 204 galaxies from the MIGHTEE Survey Early Science data. The high sensitivity of MeerKAT allows us to detect galaxies spanning more than 4 orders of magnitude in H i mass, ranging from dwarf galaxies to massive spirals, and including all morphological types. This is the first time the relation has been explored on a blind homogeneous data set that extends over a previously unexplored redshift range of 0 < z < 0.084, i.e. a period of around one billion years in cosmic time. The sample follows the same tight logarithmic relation derived from previous work, between the diameter (DHI) and the mass (MHI) of H i discs. We measure a slope of 0.501 ± 0.008, an intercept of -3.252+0.073-0.074, and an observed scatter of 0.057 dex. For the first time, we quantify the intrinsic scatter of 0.054 ± 0.003 dex (∼10 percent), which provides a constraint for cosmological simulations of galaxy formation and evolution. We derive the relation as a function of galaxy type and find that their intrinsic scatters and slopes are consistent within the errors. We also calculate the DHI-MHI relation for two redshift bins and do not find any evidence for evolution with redshift. These results suggest that over a period of one billion years in look-back time, galaxy discs have not undergone significant evolution in their gas distribution and mean surface mass density, indicating a lack of dependence on both morphological type and redshift. 2022 Journal Article http://hdl.handle.net/20.500.11937/90259 10.1093/mnras/stac693 English http://purl.org/au-research/grants/arc/DP210102103 OXFORD UNIV PRESS fulltext |
| spellingShingle | Science & Technology Physical Sciences Astronomy & Astrophysics surveys galaxies: evolution galaxies: kinematics and dynamics radio lines: galaxies TULLY-FISHER RELATION IRREGULAR GALAXIES STELLAR MASS ATOMIC GAS EVOLUTION ORIGIN ENVIRONMENT MORPHOLOGY ACCRETION PROJECT Rajohnson, S.H.A. Frank, B.S. Ponomare, A.A. Maddox, N. Kraan-Korteweg, R.C. Jarvis, M.J. Adams, E.A.K. Oosterloo, T. Baes, M. Spekkens, K. Adams, N.J. Glowacki, Marcin Kurapati, S. Prandoni, I. Heywood, I. Collier, J.D. Sekhar, S. Taylor, R. MIGHTEE-H i: the H i size-mass relation over the last billion years |
| title | MIGHTEE-H i: the H i size-mass relation over the last billion years |
| title_full | MIGHTEE-H i: the H i size-mass relation over the last billion years |
| title_fullStr | MIGHTEE-H i: the H i size-mass relation over the last billion years |
| title_full_unstemmed | MIGHTEE-H i: the H i size-mass relation over the last billion years |
| title_short | MIGHTEE-H i: the H i size-mass relation over the last billion years |
| title_sort | mightee-h i: the h i size-mass relation over the last billion years |
| topic | Science & Technology Physical Sciences Astronomy & Astrophysics surveys galaxies: evolution galaxies: kinematics and dynamics radio lines: galaxies TULLY-FISHER RELATION IRREGULAR GALAXIES STELLAR MASS ATOMIC GAS EVOLUTION ORIGIN ENVIRONMENT MORPHOLOGY ACCRETION PROJECT |
| url | http://purl.org/au-research/grants/arc/DP210102103 http://hdl.handle.net/20.500.11937/90259 |