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  GOODS-ALMA: The slow downfall of star formation in z=2-3 massive galaxies

Franco, M., Elbaz, D., Zhou, L., Magnelli, B., Schreiber, C., Ciesla, L., et al. (2020). GOODS-ALMA: The slow downfall of star formation in z=2-3 massive galaxies. Astronomy and Astrophysics, 643: A30. doi:10.1051/0004-6361/202038312.

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 Creators:
Franco, M., Author
Elbaz, D., Author
Zhou, L., Author
Magnelli, B., Author
Schreiber, C., Author
Ciesla, L., Author
Dickinson, M., Author
Nagar, N., Author
Magdis, G., Author
Alexander, D. M., Author
Béthermin, M., Author
Demarco, R., Author
Daddi, E., Author
Wang, T., Author
Mullaney, J., Author
Sargent, M., Author
Inami, H., Author
Shu, X., Author
Bournaud, F., Author
Chary, R., Author
Coogan, R. T.1, Author              Ferguson, H., AuthorFinkelstein, S. L., AuthorGiavalisco, M., AuthorGómez-Guijarro, C., AuthorIono, D., AuthorJuneau, S., AuthorLagache, G., AuthorLin, L., AuthorMotohara, K., AuthorOkumura, K., AuthorPannella, M., AuthorPapovich, C., AuthorPope, A., AuthorRujopakarn, W., AuthorSilverman, J., AuthorXiao, M., Author more..
Affiliations:
1Infrared and Submillimeter Astronomy, MPI for Extraterrestrial Physics, Max Planck Society, ou_159889              

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 Abstract: We investigate the properties of a sample of 35 galaxies, detected with the Atacama Large Millimeter/Submillimeter Array (ALMA) at 1.1 mm in the GOODS-ALMA field (area of 69 arcmin2, resolution = 0.60″, rms ≃ 0.18 mJy beam−1). Using the ultraviolet-to-radio deep multiwavelength coverage of the GOODS–South field, we fit the spectral energy distributions of these galaxies to derive their key physical properties. The galaxies detected by ALMA are among the most massive at z = 2−4 (M⋆, med = 8.5 × 1010 M) and they are either starburst or located in the upper part of the galaxy star-forming main sequence. A significant portion of our galaxy population (∼40%), located at z ∼ 2.5 − 3, exhibits abnormally low gas fractions. The sizes of these galaxies, measured with ALMA, are compatible with the trend between the rest-frame 5000 Å size and stellar mass observed for z ∼ 2 elliptical galaxies, suggesting that they are building compact bulges. We show that there is a strong link between star formation surface density (at 1.1 mm) and gas depletion time: The more compact a galaxy’s star-forming region is, the shorter its lifetime will be (without gas replenishment). The identified compact sources associated with relatively short depletion timescales (∼100 Myr) are the ideal candidates to be the progenitors of compact elliptical galaxies at z ∼ 2.

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Language(s): eng - English
 Dates: 2020-10-27
 Publication Status: Published online
 Pages: -
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 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.1051/0004-6361/202038312
Other: LOCALID: 3284734
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Title: Astronomy and Astrophysics
  Other : Astron. Astrophys.
Source Genre: Journal
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Publ. Info: France : EDP Sciences S A
Pages: - Volume / Issue: 643 Sequence Number: A30 Start / End Page: - Identifier: ISSN: 1432-0746
CoNE: https://pure.mpg.de/cone/journals/resource/954922828219_1