MIGHTEE-Hi: evolution of hi scaling relations of star-forming galaxies at z < 0.5* * released on July 29, 2022
We present the first measurements of H i galaxy scaling relations from a blind survey at z > 0.15. We perform spectral stacking of 9023 spectra of star-forming galaxies undetected in H i at 0.23 < z < 0.49, extracted from MIGHTEE-H i Early Science data cubes, acquired with the M...
| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Journal article |
| Language: | English |
| Published: |
IOP Science
2022
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| _version_ | 1797108001542242304 |
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| author | Sinigaglia, F Rodighiero, G Elson, E Vaccari, M Maddox, N Frank, BS Jarvis, MJ Oosterloo, T Davé, R Salvato, M Baes, M Bellstedt, S Bisigello, L Collier, JD Cook, RHW Davies, LJM Delhaize, J Driver, SP Foster, C Kurapati, S Claudia, CD Lidman, C Mancera Piña, PE Meyer, MJ Mogotsi, KM Pan, H Ponomareva, AA Prandoni, I Rajohnson, SHA Robotham, ASG Santos, MG Sekhar, S Spekkens, K Thorne, JE van der Hulst, JM Wong, OI |
| author_facet | Sinigaglia, F Rodighiero, G Elson, E Vaccari, M Maddox, N Frank, BS Jarvis, MJ Oosterloo, T Davé, R Salvato, M Baes, M Bellstedt, S Bisigello, L Collier, JD Cook, RHW Davies, LJM Delhaize, J Driver, SP Foster, C Kurapati, S Claudia, CD Lidman, C Mancera Piña, PE Meyer, MJ Mogotsi, KM Pan, H Ponomareva, AA Prandoni, I Rajohnson, SHA Robotham, ASG Santos, MG Sekhar, S Spekkens, K Thorne, JE van der Hulst, JM Wong, OI |
| author_sort | Sinigaglia, F |
| collection | OXFORD |
| description | We present the first measurements of H i galaxy scaling relations from a blind survey at z > 0.15. We perform spectral stacking of 9023 spectra of star-forming galaxies undetected in H i at 0.23 < z < 0.49, extracted from MIGHTEE-H i Early Science data cubes, acquired with the MeerKAT radio telescope. We stack galaxies in bins of galaxy properties (stellar mass M *, star formation rateSFR, and specific star formation rate sSFR, with sSFR ≡ M */SFR), obtaining ≳5σ detections in most cases, the strongest H i-stacking detections to date in this redshift range. With these detections, we are able to measure scaling relations in the probed redshift interval, finding evidence for a moderate evolution from the median redshift of our sample z med ∼ 0.37 to z ∼ 0. In particular, low-M * galaxies ( log 10 ( M * / M ⊙ ) ∼ 9 ) experience a strong H i depletion (∼0.5 dex in log 10 ( M H I / M ⊙ ) ), while massive galaxies ( log 10 ( M * / M ⊙ ) ∼ 11 ) keep their H i mass nearly unchanged. When looking at the star formation activity, highly star-forming galaxies evolve significantly in M H I (f H I, where f H I ≡ M H I/M *) at fixed SFR (sSFR), while at the lowest probed SFR (sSFR) the scaling relations show no evolution. These findings suggest a scenario in which low-M * galaxies have experienced a strong H i depletion during the last ∼5 Gyr, while massive galaxies have undergone a significant H i replenishment through some accretion mechanism, possibly minor mergers. Interestingly, our results are in good agreement with the predictions of the simba simulation. We conclude that this work sets novel important observational constraints on galaxy scaling relations. |
| first_indexed | 2024-03-07T07:23:24Z |
| format | Journal article |
| id | oxford-uuid:c644b3bf-1031-4892-8f7a-3b4e920f08aa |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T07:23:24Z |
| publishDate | 2022 |
| publisher | IOP Science |
| record_format | dspace |
| spelling | oxford-uuid:c644b3bf-1031-4892-8f7a-3b4e920f08aa2022-11-02T11:20:17ZMIGHTEE-Hi: evolution of hi scaling relations of star-forming galaxies at z < 0.5* * released on July 29, 2022Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:c644b3bf-1031-4892-8f7a-3b4e920f08aaEnglishSymplectic ElementsIOP Science2022Sinigaglia, FRodighiero, GElson, EVaccari, MMaddox, NFrank, BSJarvis, MJOosterloo, TDavé, RSalvato, MBaes, MBellstedt, SBisigello, LCollier, JDCook, RHWDavies, LJMDelhaize, JDriver, SPFoster, CKurapati, SClaudia, CDLidman, CMancera Piña, PEMeyer, MJMogotsi, KMPan, HPonomareva, AAPrandoni, IRajohnson, SHARobotham, ASGSantos, MGSekhar, SSpekkens, KThorne, JEvan der Hulst, JMWong, OIWe present the first measurements of H i galaxy scaling relations from a blind survey at z > 0.15. We perform spectral stacking of 9023 spectra of star-forming galaxies undetected in H i at 0.23 < z < 0.49, extracted from MIGHTEE-H i Early Science data cubes, acquired with the MeerKAT radio telescope. We stack galaxies in bins of galaxy properties (stellar mass M *, star formation rateSFR, and specific star formation rate sSFR, with sSFR ≡ M */SFR), obtaining ≳5σ detections in most cases, the strongest H i-stacking detections to date in this redshift range. With these detections, we are able to measure scaling relations in the probed redshift interval, finding evidence for a moderate evolution from the median redshift of our sample z med ∼ 0.37 to z ∼ 0. In particular, low-M * galaxies ( log 10 ( M * / M ⊙ ) ∼ 9 ) experience a strong H i depletion (∼0.5 dex in log 10 ( M H I / M ⊙ ) ), while massive galaxies ( log 10 ( M * / M ⊙ ) ∼ 11 ) keep their H i mass nearly unchanged. When looking at the star formation activity, highly star-forming galaxies evolve significantly in M H I (f H I, where f H I ≡ M H I/M *) at fixed SFR (sSFR), while at the lowest probed SFR (sSFR) the scaling relations show no evolution. These findings suggest a scenario in which low-M * galaxies have experienced a strong H i depletion during the last ∼5 Gyr, while massive galaxies have undergone a significant H i replenishment through some accretion mechanism, possibly minor mergers. Interestingly, our results are in good agreement with the predictions of the simba simulation. We conclude that this work sets novel important observational constraints on galaxy scaling relations. |
| spellingShingle | Sinigaglia, F Rodighiero, G Elson, E Vaccari, M Maddox, N Frank, BS Jarvis, MJ Oosterloo, T Davé, R Salvato, M Baes, M Bellstedt, S Bisigello, L Collier, JD Cook, RHW Davies, LJM Delhaize, J Driver, SP Foster, C Kurapati, S Claudia, CD Lidman, C Mancera Piña, PE Meyer, MJ Mogotsi, KM Pan, H Ponomareva, AA Prandoni, I Rajohnson, SHA Robotham, ASG Santos, MG Sekhar, S Spekkens, K Thorne, JE van der Hulst, JM Wong, OI MIGHTEE-Hi: evolution of hi scaling relations of star-forming galaxies at z < 0.5* * released on July 29, 2022 |
| title | MIGHTEE-Hi: evolution of hi scaling relations of star-forming galaxies at z < 0.5* * released on July 29, 2022 |
| title_full | MIGHTEE-Hi: evolution of hi scaling relations of star-forming galaxies at z < 0.5* * released on July 29, 2022 |
| title_fullStr | MIGHTEE-Hi: evolution of hi scaling relations of star-forming galaxies at z < 0.5* * released on July 29, 2022 |
| title_full_unstemmed | MIGHTEE-Hi: evolution of hi scaling relations of star-forming galaxies at z < 0.5* * released on July 29, 2022 |
| title_short | MIGHTEE-Hi: evolution of hi scaling relations of star-forming galaxies at z < 0.5* * released on July 29, 2022 |
| title_sort | mightee hi evolution of hi scaling relations of star forming galaxies at z lt 0 5 released on july 29 2022 |
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