TY - JOUR
T1 - The edge-califa survey
T2 - Self-regulation of star formation at kpc scales
AU - Barrera-Ballesteros, J. K.
AU - Sanchez, S. F.
AU - Heckman, T.
AU - Wong, T.
AU - Bolatto, A.
AU - Ostriker, E.
AU - Rosolowsky, E.
AU - Carigi, L.
AU - Vogel, S.
AU - Levy, R. C.
AU - Colombo, D.
AU - Luo, Yufeng
AU - Cao, Yixian
N1 - Publisher Copyright:
© 2021 Oxford University Press. All rights reserved.
PY - 2021
Y1 - 2021
N2 - The processes that regulate star formation are essential to understand how galaxies evolve. We present the relation between star formation rate density, ΣSFR , and hydrostatic mid-plane pressure, Ph, for 4260 star-forming regions of kpc size located in 96 galaxies included in the EDGE-CALIFA survey covering a wide range of stellar masses and morphologies. We find that these two parameters are tightly correlated, showing a smaller scatter in comparison to other star-forming relations. A power law, with a slightly sublinear index, is a good representation of this relation. Its residuals show a significant anticorrelation with both stellar age and metallicity whereas the total stellar mass may also play a secondary role in shaping the ΣSFR-Ph relation. For actively star-forming regions, we find that the effective feedback momentum per unit stellar mass (p∗/m∗), measured from the Ph/ΣSFR ratio increases with Ph. The median value of this ratio for all the sampled regions is larger than the expected momentum just from supernovae explosions. Morphology of the galaxies, including bars, does not seem to have a significant impact in the ΣSFR-Ph relation. Our analysis indicates that local ΣSFR self-regulation comes mainly from momentum injection to the interstellar medium from supernovae explosions. However, other mechanisms in disc galaxies may also play a significant role in shaping the ΣSFR at kpc scales. Our results also suggest that Ph is the main parameter that modulates star formation at kpc scales, rather than individual components of the baryonic mass.
AB - The processes that regulate star formation are essential to understand how galaxies evolve. We present the relation between star formation rate density, ΣSFR , and hydrostatic mid-plane pressure, Ph, for 4260 star-forming regions of kpc size located in 96 galaxies included in the EDGE-CALIFA survey covering a wide range of stellar masses and morphologies. We find that these two parameters are tightly correlated, showing a smaller scatter in comparison to other star-forming relations. A power law, with a slightly sublinear index, is a good representation of this relation. Its residuals show a significant anticorrelation with both stellar age and metallicity whereas the total stellar mass may also play a secondary role in shaping the ΣSFR-Ph relation. For actively star-forming regions, we find that the effective feedback momentum per unit stellar mass (p∗/m∗), measured from the Ph/ΣSFR ratio increases with Ph. The median value of this ratio for all the sampled regions is larger than the expected momentum just from supernovae explosions. Morphology of the galaxies, including bars, does not seem to have a significant impact in the ΣSFR-Ph relation. Our analysis indicates that local ΣSFR self-regulation comes mainly from momentum injection to the interstellar medium from supernovae explosions. However, other mechanisms in disc galaxies may also play a significant role in shaping the ΣSFR at kpc scales. Our results also suggest that Ph is the main parameter that modulates star formation at kpc scales, rather than individual components of the baryonic mass.
KW - Galaxies: Evolution
KW - Galaxies: Fundamental parameters
KW - Galaxies: Star formation
KW - Techniques: Imaging spectroscopy
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U2 - 10.1093/mnras/stab755
DO - 10.1093/mnras/stab755
M3 - Article
AN - SCOPUS:85108547135
SN - 0035-8711
VL - 503
SP - 3643
EP - 3659
JO - Monthly Notices of the Royal Astronomical Society
JF - Monthly Notices of the Royal Astronomical Society
IS - 3
ER -