GOODS-ALMA 2.0: Starbursts in the main sequence reveal compact star formation regulating galaxy evolution prequenching
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GOODS-ALMA 2.0 : Starbursts in the main sequence reveal compact star formation regulating galaxy evolution prequenching. / Gomez-Guijarro, C.; Elbaz, D.; Xiao, M.; Kokorev, V.; Magdis, G. E.; Magnelli, B.; Daddi, E.; Valentino, F.; Sargent, M. T.; Dickinson, M.; Bethermin, M.; Franco, M.; Pope, A.; Kalita, B. S.; Ciesla, L.; Demarco, R.; Inami, H.; Rujopakarn, W.; Shu, X.; Wang, T.; Zhou, L.; Alexander, D. M.; Bournaud, F.; Chary, R.; Ferguson, H. C.; Finkelstein, S. L.; Giavalisco, M.; Iono, D.; Juneau, S.; Kartaltepe, J. S.; Lagache, G.; Le Floc'h, E.; Leiton, R.; Leroy, L.; Lin, L.; Motohara, K.; Mullaney, J.; Okumura, K.; Pannella, M.; Papovich, C.; Treister, E.
In: Astronomy & Astrophysics, Vol. 659, A196, 29.03.2022.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - GOODS-ALMA 2.0
T2 - Starbursts in the main sequence reveal compact star formation regulating galaxy evolution prequenching
AU - Gomez-Guijarro, C.
AU - Elbaz, D.
AU - Xiao, M.
AU - Kokorev, V.
AU - Magdis, G. E.
AU - Magnelli, B.
AU - Daddi, E.
AU - Valentino, F.
AU - Sargent, M. T.
AU - Dickinson, M.
AU - Bethermin, M.
AU - Franco, M.
AU - Pope, A.
AU - Kalita, B. S.
AU - Ciesla, L.
AU - Demarco, R.
AU - Inami, H.
AU - Rujopakarn, W.
AU - Shu, X.
AU - Wang, T.
AU - Zhou, L.
AU - Alexander, D. M.
AU - Bournaud, F.
AU - Chary, R.
AU - Ferguson, H. C.
AU - Finkelstein, S. L.
AU - Giavalisco, M.
AU - Iono, D.
AU - Juneau, S.
AU - Kartaltepe, J. S.
AU - Lagache, G.
AU - Le Floc'h, E.
AU - Leiton, R.
AU - Leroy, L.
AU - Lin, L.
AU - Motohara, K.
AU - Mullaney, J.
AU - Okumura, K.
AU - Pannella, M.
AU - Papovich, C.
AU - Treister, E.
PY - 2022/3/29
Y1 - 2022/3/29
N2 - Compact star formation appears to be generally common in dusty star-forming galaxies (SFGs). However, its role in the framework set by the scaling relations in galaxy evolution remains to be understood. In this work we follow up on the galaxy sample from the GOODS-ALMA 2.0 survey, an ALMA blind survey at 1.1 mm covering a continuous area of 72.42 arcmin(2) using two array configurations. We derived physical properties, such as star formation rates, gas fractions, depletion timescales, and dust temperatures for the galaxy sample built from the survey. There exists a subset of galaxies that exhibit starburst-like short depletion timescales, but they are located within the scatter of the so-called main sequence of SFGs. These are dubbed starbursts in the main sequence and display the most compact star formation and they are characterized by the shortest depletion timescales, lowest gas fractions, and highest dust temperatures of the galaxy sample, compared to typical SFGs at the same stellar mass and redshift. They are also very massive, accounting for similar to 60% of the most massive galaxies in the sample (log(M-*/M-circle dot) > 11.0). We find trends between the areas of the ongoing star formation regions and the derived physical properties for the sample, unveiling the role of compact star formation as a physical driver of these properties. Starbursts in the main sequence appear to be the extreme cases of these trends. We discuss possible scenarios of galaxy evolution to explain the results drawn from our galaxy sample. Our findings suggest that the star formation rate is sustained in SFGs by gas and star formation compression, keeping them within the main sequence even when their gas fractions are low and they are presumably on the way to quiescence.
AB - Compact star formation appears to be generally common in dusty star-forming galaxies (SFGs). However, its role in the framework set by the scaling relations in galaxy evolution remains to be understood. In this work we follow up on the galaxy sample from the GOODS-ALMA 2.0 survey, an ALMA blind survey at 1.1 mm covering a continuous area of 72.42 arcmin(2) using two array configurations. We derived physical properties, such as star formation rates, gas fractions, depletion timescales, and dust temperatures for the galaxy sample built from the survey. There exists a subset of galaxies that exhibit starburst-like short depletion timescales, but they are located within the scatter of the so-called main sequence of SFGs. These are dubbed starbursts in the main sequence and display the most compact star formation and they are characterized by the shortest depletion timescales, lowest gas fractions, and highest dust temperatures of the galaxy sample, compared to typical SFGs at the same stellar mass and redshift. They are also very massive, accounting for similar to 60% of the most massive galaxies in the sample (log(M-*/M-circle dot) > 11.0). We find trends between the areas of the ongoing star formation regions and the derived physical properties for the sample, unveiling the role of compact star formation as a physical driver of these properties. Starbursts in the main sequence appear to be the extreme cases of these trends. We discuss possible scenarios of galaxy evolution to explain the results drawn from our galaxy sample. Our findings suggest that the star formation rate is sustained in SFGs by gas and star formation compression, keeping them within the main sequence even when their gas fractions are low and they are presumably on the way to quiescence.
KW - galaxies
KW - evolution
KW - fundamental parameters
KW - high-redshift
KW - star formation
KW - structure
KW - submillimeter
KW - SIMILAR-TO 3
KW - MASS-METALLICITY RELATION
KW - MOLECULAR GAS FRACTIONS
KW - ORIGINS DEEP SURVEY
KW - FORMING GALAXIES
KW - SPECTROSCOPIC SURVEY
KW - HIGH-REDSHIFT
KW - SUBMILLIMETER GALAXIES
KW - INFRARED-EMISSION
KW - DUST TEMPERATURES
U2 - 10.1051/0004-6361/202142352
DO - 10.1051/0004-6361/202142352
M3 - Journal article
VL - 659
JO - Astronomy & Astrophysics
JF - Astronomy & Astrophysics
SN - 0004-6361
M1 - A196
ER -
ID: 302540368