MIGHTEE-Hi: Evolution of Hi Scaling Relations of Star-forming Galaxies at z < 0.5*

Francesco Sinigaglia; Giulia Rodighiero; Ed Elson; Mattia Vaccari; Natasha Maddox; Bradley S. Frank; Matt J. Jarvis; Tom Oosterloo; Romeel Davé; Mara Salvato; Maarten Baes; Sabine Bellstedt; Laura Bisigello; Jordan D. Collier; Robin H. W. Cook; Luke J. M. Davies; Jacinta Delhaize; Simon P. Driver; Caroline Foster; Sushma Kurapati; Claudia del P. Lagos; Christopher Lidman; Pavel E. Mancera Piña; Martin J. Meyer; K. Moses Mogotsi; Hengxing Pan; Anastasia A. Ponomareva; Isabella Prandoni; Sambatriniaina H. A. Rajohnson; Aaron S. G. Robotham; Mario G. Santos; Srikrishna Sekhar; Kristine Spekkens; Jessica E. Thorne; Jan M. van der Hulst; O. Ivy Wong

doi:10.3847/2041-8213/ac85ae

MIGHTEE-Hi: Evolution of Hi Scaling Relations of Star-forming Galaxies at z < 0.5*

Francesco Sinigaglia^*, Giulia Rodighiero, Ed Elson, Mattia Vaccari, Natasha Maddox, Bradley S. Frank, Matt J. Jarvis, Tom Oosterloo, Romeel Davé, Mara Salvato, Maarten Baes, Sabine Bellstedt, Laura Bisigello, Jordan D. Collier, Robin H. W. Cook, Luke J. M. Davies, Jacinta Delhaize, Simon P. Driver, Caroline Foster, Sushma KurapatiClaudia del P. Lagos, Christopher Lidman, Pavel E. Mancera Piña, Martin J. Meyer, K. Moses Mogotsi, Hengxing Pan, Anastasia A. Ponomareva, Isabella Prandoni, Sambatriniaina H. A. Rajohnson, Aaron S. G. Robotham, Mario G. Santos, Srikrishna Sekhar, Kristine Spekkens, Jessica E. Thorne, Jan M. van der Hulst, O. Ivy Wong

^*Corresponding author for this work

School of Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

Abstract

We present the first measurements of HI galaxy scaling relations from a blind survey at z>0.15. We perform spectral stacking of 9023 spectra of star-forming galaxies undetected in HI at 0.23<z<0.49, extracted from MIGHTEE-HI Early Science datacubes, acquired with the MeerKAT radio telescope. We stack galaxies in bins of galaxy properties (M∗, SFR, and sSFR, with sSFR≡M∗/SFR), obtaining ≳5σ detections in most cases, the strongest HI-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 zmed∼0.37 to z∼0. In particular, low-M∗ galaxies (log10(M∗/M⊙)∼9) experience a strong HI depletion (∼0.5 dex in log10(MHI/M⊙)), while massive galaxies (log10(M∗/M⊙)∼11) keep their HI mass nearly unchanged. When looking at the star formation activity, highly star-forming galaxies evolve significantly in MHI (fHI, where fHI≡M/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 HI depletion during the last ∼4 Gyr, while massive galaxies have undergone a significant HI 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.

Original language	English
Article number	L13
Pages (from-to)	1-9
Number of pages	9
Journal	Astrophysical Journal Letters
Volume	935
Issue number	1
DOIs	https://doi.org/10.3847/2041-8213/ac85ae
Publication status	Published - 12 Aug 2022

Keywords

astro-ph.GA
astro-ph.CO

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Sinigaglia_2022_ApJL_935_L13Final published version, 1.03 MBLicence: CC BY

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Sinigaglia, F., Rodighiero, G., Elson, E., Vaccari, M., Maddox, N., Frank, B. S., Jarvis, M. J., Oosterloo, T., Davé, R., Salvato, M., Baes, M., Bellstedt, S., Bisigello, L., Collier, J. D., Cook, R. H. W., Davies, L. J. M., Delhaize, J., Driver, S. P., Foster, C., ... Wong, O. I. (2022). MIGHTEE-Hi: Evolution of Hi Scaling Relations of Star-forming Galaxies at z < 0.5*. Astrophysical Journal Letters, 935(1), 1-9. [L13]. https://doi.org/10.3847/2041-8213/ac85ae

@article{1e02793f831a42e888f4dc85cb37495b,

title = "MIGHTEE-Hi: Evolution of Hi Scaling Relations of Star-forming Galaxies at z < 0.5*",

abstract = "We present the first measurements of HI galaxy scaling relations from a blind survey at z>0.15. We perform spectral stacking of 9023 spectra of star-forming galaxies undetected in HI at 0.23<z<0.49, extracted from MIGHTEE-HI Early Science datacubes, acquired with the MeerKAT radio telescope. We stack galaxies in bins of galaxy properties (M∗, SFR, and sSFR, with sSFR≡M∗/SFR), obtaining ≳5σ detections in most cases, the strongest HI-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 zmed∼0.37 to z∼0. In particular, low-M∗ galaxies (log10(M∗/M⊙)∼9) experience a strong HI depletion (∼0.5 dex in log10(MHI/M⊙)), while massive galaxies (log10(M∗/M⊙)∼11) keep their HI mass nearly unchanged. When looking at the star formation activity, highly star-forming galaxies evolve significantly in MHI (fHI, where fHI≡M/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 HI depletion during the last ∼4 Gyr, while massive galaxies have undergone a significant HI 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. ",

keywords = "astro-ph.GA, astro-ph.CO",

author = "Francesco Sinigaglia and Giulia Rodighiero and Ed Elson and Mattia Vaccari and Natasha Maddox and Frank, {Bradley S.} and Jarvis, {Matt J.} and Tom Oosterloo and Romeel Dav{\'e} and Mara Salvato and Maarten Baes and Sabine Bellstedt and Laura Bisigello and Collier, {Jordan D.} and Cook, {Robin H. W.} and Davies, {Luke J. M.} and Jacinta Delhaize and Driver, {Simon P.} and Caroline Foster and Sushma Kurapati and Lagos, {Claudia del P.} and Christopher Lidman and Pi{\~n}a, {Pavel E. Mancera} and Meyer, {Martin J.} and Mogotsi, {K. Moses} and Hengxing Pan and Ponomareva, {Anastasia A.} and Isabella Prandoni and Rajohnson, {Sambatriniaina H. A.} and Robotham, {Aaron S. G.} and Santos, {Mario G.} and Srikrishna Sekhar and Kristine Spekkens and Thorne, {Jessica E.} and Hulst, {Jan M. van der} and Wong, {O. Ivy}",

note = "12 pages, 5 figures. Accepted for publication in ApJ Letters on 30 July 2022",

year = "2022",

month = aug,

day = "12",

doi = "10.3847/2041-8213/ac85ae",

language = "English",

volume = "935",

pages = "1--9",

journal = "Astrophysical Journal Letters",

issn = "2041-8205",

publisher = "IOP Publishing Ltd.",

number = "1",

}

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, Lagos, CDP, Lidman, C, Piña, PEM, Meyer, MJ, Mogotsi, KM, Pan, H, Ponomareva, AA, Prandoni, I, Rajohnson, SHA, Robotham, ASG, Santos, MG, Sekhar, S, Spekkens, K, Thorne, JE, Hulst, JMVD & Wong, OI 2022, 'MIGHTEE-Hi: Evolution of Hi Scaling Relations of Star-forming Galaxies at z < 0.5*', Astrophysical Journal Letters, vol. 935, no. 1, L13, pp. 1-9. https://doi.org/10.3847/2041-8213/ac85ae

TY - JOUR

T1 - MIGHTEE-Hi: Evolution of Hi Scaling Relations of Star-forming Galaxies at z < 0.5*

AU - Sinigaglia, Francesco

AU - Rodighiero, Giulia

AU - Elson, Ed

AU - Vaccari, Mattia

AU - Maddox, Natasha

AU - Frank, Bradley S.

AU - Jarvis, Matt J.

AU - Oosterloo, Tom

AU - Davé, Romeel

AU - Salvato, Mara

AU - Baes, Maarten

AU - Bellstedt, Sabine

AU - Bisigello, Laura

AU - Collier, Jordan D.

AU - Cook, Robin H. W.

AU - Davies, Luke J. M.

AU - Delhaize, Jacinta

AU - Driver, Simon P.

AU - Foster, Caroline

AU - Kurapati, Sushma

AU - Lagos, Claudia del P.

AU - Lidman, Christopher

AU - Piña, Pavel E. Mancera

AU - Meyer, Martin J.

AU - Mogotsi, K. Moses

AU - Pan, Hengxing

AU - Ponomareva, Anastasia A.

AU - Prandoni, Isabella

AU - Rajohnson, Sambatriniaina H. A.

AU - Robotham, Aaron S. G.

AU - Santos, Mario G.

AU - Sekhar, Srikrishna

AU - Spekkens, Kristine

AU - Thorne, Jessica E.

AU - Hulst, Jan M. van der

AU - Wong, O. Ivy

N1 - 12 pages, 5 figures. Accepted for publication in ApJ Letters on 30 July 2022

PY - 2022/8/12

Y1 - 2022/8/12

N2 - We present the first measurements of HI galaxy scaling relations from a blind survey at z>0.15. We perform spectral stacking of 9023 spectra of star-forming galaxies undetected in HI at 0.23<z<0.49, extracted from MIGHTEE-HI Early Science datacubes, acquired with the MeerKAT radio telescope. We stack galaxies in bins of galaxy properties (M∗, SFR, and sSFR, with sSFR≡M∗/SFR), obtaining ≳5σ detections in most cases, the strongest HI-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 zmed∼0.37 to z∼0. In particular, low-M∗ galaxies (log10(M∗/M⊙)∼9) experience a strong HI depletion (∼0.5 dex in log10(MHI/M⊙)), while massive galaxies (log10(M∗/M⊙)∼11) keep their HI mass nearly unchanged. When looking at the star formation activity, highly star-forming galaxies evolve significantly in MHI (fHI, where fHI≡M/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 HI depletion during the last ∼4 Gyr, while massive galaxies have undergone a significant HI 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.

AB - We present the first measurements of HI galaxy scaling relations from a blind survey at z>0.15. We perform spectral stacking of 9023 spectra of star-forming galaxies undetected in HI at 0.23<z<0.49, extracted from MIGHTEE-HI Early Science datacubes, acquired with the MeerKAT radio telescope. We stack galaxies in bins of galaxy properties (M∗, SFR, and sSFR, with sSFR≡M∗/SFR), obtaining ≳5σ detections in most cases, the strongest HI-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 zmed∼0.37 to z∼0. In particular, low-M∗ galaxies (log10(M∗/M⊙)∼9) experience a strong HI depletion (∼0.5 dex in log10(MHI/M⊙)), while massive galaxies (log10(M∗/M⊙)∼11) keep their HI mass nearly unchanged. When looking at the star formation activity, highly star-forming galaxies evolve significantly in MHI (fHI, where fHI≡M/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 HI depletion during the last ∼4 Gyr, while massive galaxies have undergone a significant HI 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.

KW - astro-ph.GA

KW - astro-ph.CO

U2 - 10.3847/2041-8213/ac85ae

DO - 10.3847/2041-8213/ac85ae

M3 - Article

VL - 935

SP - 1

EP - 9

JO - Astrophysical Journal Letters

JF - Astrophysical Journal Letters

SN - 2041-8205

IS - 1

M1 - L13

ER -

MIGHTEE-Hi: Evolution of Hi Scaling Relations of Star-forming Galaxies at z < 0.5*

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