Stellar feedback in a clumpy galaxy at z similar to 3.4
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Stellar feedback in a clumpy galaxy at z similar to 3.4. / Iani, E.; Zanella, A.; Vernet, J.; Richard, J.; Gronke, M.; Harrison, C. M.; Arrigoni-Battaia, F.; Rodighiero, G.; Burkert, A.; Behrendt, M.; Chen, Chian-Chou; Emsellem, E.; Fensch, J.; Hibon, P.; Hilker, M.; Le Floc'h, E.; Mainieri, V.; Swinbank, A. M.; Valentino, F.; Vanzella, E.; Zwaan, M. A.
I: Monthly Notices of the Royal Astronomical Society, Bind 507, Nr. 3, 23.09.2021, s. 3830-3848.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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TY - JOUR
T1 - Stellar feedback in a clumpy galaxy at z similar to 3.4
AU - Iani, E.
AU - Zanella, A.
AU - Vernet, J.
AU - Richard, J.
AU - Gronke, M.
AU - Harrison, C. M.
AU - Arrigoni-Battaia, F.
AU - Rodighiero, G.
AU - Burkert, A.
AU - Behrendt, M.
AU - Chen, Chian-Chou
AU - Emsellem, E.
AU - Fensch, J.
AU - Hibon, P.
AU - Hilker, M.
AU - Le Floc'h, E.
AU - Mainieri, V.
AU - Swinbank, A. M.
AU - Valentino, F.
AU - Vanzella, E.
AU - Zwaan, M. A.
PY - 2021/9/23
Y1 - 2021/9/23
N2 - Giant star-forming regions (clumps) are widespread features of galaxies at z approximate to 1-4. Theory predicts that they can play a crucial role in galaxy evolution, if they survive to stellar feedback for >50 Myr. Numerical simulations show that clumps' survival depends on the stellar feedback recipes that are adopted. Up to date, observational constraints on both clumps' outflows strength and gas removal time-scale are still uncertain. In this context, we study a line-emitting galaxy at redshift z similar or equal to 3.4 lensed by the foreground galaxy cluster Abell 2895. Four compact clumps with sizes less than or similar to 280 pc and representative of the low-mass end of clumps' mass distribution (stellar masses less than or similar to 2 x 10(8) M-circle dot) dominate the galaxy morphology. The clumps are likely forming stars in a starbursting mode and have a young stellar population (similar to 10 Myr). The properties of the Lyman-alpha (Ly alpha) emission and nebular far-ultraviolet absorption lines indicate the presence of ejected material with global outflowing velocities of similar to 200-300 km s(-1). Assuming that the detected outflows are the consequence of star formation feedback, we infer an average mass loading factor (eta) for the clumps of similar to 1.8-2.4 consistent with results obtained from hydrodynamical simulations of clumpy galaxies that assume relatively strong stellar feedback. Assuming no gas inflows (semiclosed box model), the estimates of n suggest that the time-scale over which the outflows expel the molecular gas reservoir (similar or equal to 7 x 10(8 )M(circle dot)) of the four detected low-mass clumps is less than or similar to 50 Myr.
AB - Giant star-forming regions (clumps) are widespread features of galaxies at z approximate to 1-4. Theory predicts that they can play a crucial role in galaxy evolution, if they survive to stellar feedback for >50 Myr. Numerical simulations show that clumps' survival depends on the stellar feedback recipes that are adopted. Up to date, observational constraints on both clumps' outflows strength and gas removal time-scale are still uncertain. In this context, we study a line-emitting galaxy at redshift z similar or equal to 3.4 lensed by the foreground galaxy cluster Abell 2895. Four compact clumps with sizes less than or similar to 280 pc and representative of the low-mass end of clumps' mass distribution (stellar masses less than or similar to 2 x 10(8) M-circle dot) dominate the galaxy morphology. The clumps are likely forming stars in a starbursting mode and have a young stellar population (similar to 10 Myr). The properties of the Lyman-alpha (Ly alpha) emission and nebular far-ultraviolet absorption lines indicate the presence of ejected material with global outflowing velocities of similar to 200-300 km s(-1). Assuming that the detected outflows are the consequence of star formation feedback, we infer an average mass loading factor (eta) for the clumps of similar to 1.8-2.4 consistent with results obtained from hydrodynamical simulations of clumpy galaxies that assume relatively strong stellar feedback. Assuming no gas inflows (semiclosed box model), the estimates of n suggest that the time-scale over which the outflows expel the molecular gas reservoir (similar or equal to 7 x 10(8 )M(circle dot)) of the four detected low-mass clumps is less than or similar to 50 Myr.
KW - galaxies: evolution
KW - galaxies: high-redshift
KW - galaxies: irregular
KW - galaxies: ISM
KW - galaxies: star formation
KW - STAR-FORMING CLUMPS
KW - LY-ALPHA RADIATION
KW - GRAVITATIONALLY LENSED GALAXIES
KW - INTEGRAL FIELD SPECTROSCOPY
KW - RESONANCE-LINE RADIATION
KW - MOLECULAR GAS FRACTIONS
KW - LYMAN-BREAK GALAXY
KW - ULTRA DEEP FIELD
KW - HIGH-REDSHIFT
KW - GIANT CLUMPS
U2 - 10.1093/mnras/stab2376
DO - 10.1093/mnras/stab2376
M3 - Journal article
VL - 507
SP - 3830
EP - 3848
JO - Royal Astronomical Society. Monthly Notices
JF - Royal Astronomical Society. Monthly Notices
SN - 0035-8711
IS - 3
ER -
ID: 284089798