Universität zu Köln

Dayal, P., Ferrara, A., Sommovigo, L., Bouwens, R., Oesch, P. A., Smit, R., Gonzalez, V, Schouws, S., Stefanon, M., Kobayashi, C., Bremer, J., Algera, H. S. B., Aravena, M., Bowler, R. A. A., da Cunha, E., Fudamoto, Y., Graziani, L., Hodge, J., Inami, H., De Looze, I, Pallottini, A., Riechers, D., Schneider, R., Stark, D. and Endsley, R. (2022). The ALMA REBELS survey: the dust content of z similar to 7 Lyman break galaxies. Mon. Not. Roy. Astron. Soc., 512 (1). S. 989 - 1003. OXFORD: OXFORD UNIV PRESS. ISSN 1365-2966

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Abstract

We include a fully coupled treatment of metal and dust enrichment into the DELPHI semi-analytic model of galaxy formation to explain the dust content of 13 Lyman break galaxies (LBGs) detected by the Atacama Large millimetre Array (ALMA) REBELS Large Program at z similar or equal to 7. We find that the galaxy dust mass, M-d, is regulated by the combination of Type II supernova dust production, astration, shock destruction, and ejection in outflows; grain growth (with a standard time-scale tau(0) = 30 Myr) plays a negligible role. The model predicts a dust-to-stellar mass ratio of similar to 0.07-0.1 per cent and a UV-to-total star formation rate relation such that log(psi(UV)) = -0.05 [log(psi)](2) + 0.86 log(psi) - 0.05 (implying that 55-80 per cent of the star formation is obscured) for REBELS galaxies with stellar mass M-* = 10(9)-10(10)M(circle dot). This relation reconciles the intrinsic UV luminosity of LBGs with their observed luminosity function at z = 7. However, 2 out of the 13 systems show dust-to-stellar mass ratios (similar to 0.94-1.1 per cent) that are up to 18 times larger than expected from the fiducial relation. Due to the physical coupling between dust and metal enrichment, even decreasing to to very low values (0.3 Myr) only increases the dust-to-stellar mass ratio by a factor of similar to 2. Given that grain growth is not a viable explanation for such high observed ratios of the dust-to-stellar mass, we propose alternative solutions.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Dayal, P. UNSPECIFIED UNSPECIFIED UNSPECIFIED Ferrara, A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Sommovigo, L. UNSPECIFIED UNSPECIFIED UNSPECIFIED Bouwens, R. UNSPECIFIED UNSPECIFIED UNSPECIFIED Oesch, P. A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Smit, R. UNSPECIFIED UNSPECIFIED UNSPECIFIED Gonzalez, V UNSPECIFIED UNSPECIFIED UNSPECIFIED Schouws, S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Stefanon, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Kobayashi, C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Bremer, J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Algera, H. S. B. UNSPECIFIED UNSPECIFIED UNSPECIFIED Aravena, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Bowler, R. A. A. UNSPECIFIED UNSPECIFIED UNSPECIFIED da Cunha, E. UNSPECIFIED UNSPECIFIED UNSPECIFIED Fudamoto, Y. UNSPECIFIED UNSPECIFIED UNSPECIFIED Graziani, L. UNSPECIFIED UNSPECIFIED UNSPECIFIED Hodge, J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Inami, H. UNSPECIFIED UNSPECIFIED UNSPECIFIED De Looze, I UNSPECIFIED UNSPECIFIED UNSPECIFIED Pallottini, A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Riechers, D. UNSPECIFIED UNSPECIFIED UNSPECIFIED Schneider, R. UNSPECIFIED UNSPECIFIED UNSPECIFIED Stark, D. UNSPECIFIED UNSPECIFIED UNSPECIFIED Endsley, R. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-697206
DOI:	10.1093/mnras/stac537
Journal or Publication Title:	Mon. Not. Roy. Astron. Soc.
Volume:	512
Number:	1
Page Range:	S. 989 - 1003
Date:	2022
Publisher:	OXFORD UNIV PRESS
Place of Publication:	OXFORD
ISSN:	1365-2966
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language ULTRA-DEEP FIELD; UV-CONTINUUM SLOPE; 1ST BILLION YEARS; STAR-FORMATION; HIGH-REDSHIFT; LUMINOSITY FUNCTION; INTERSTELLAR DUST; EVOLUTION; MASS; EPOCH Multiple languages Astronomy & Astrophysics Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/69720