تقرير
The ALPINE-ALMA [CII] Survey: Dust emission effective radius up to 3 kpc in the Early Universe
| العنوان: | The ALPINE-ALMA [CII] Survey: Dust emission effective radius up to 3 kpc in the Early Universe |
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| المؤلفون: | Pozzi, F., Calura, F., D'Amato, Q., Gavarente, M., Bethermin, M., Boquien, M., Casasola, V., Cimatti, A., Cochrane, R., Dessauges-Zavadsky, M., Enia, A., Esposito, F., Faisst, A. L., Gilli, R., Ginolfi, M., Gobat, R., Gruppioni, C., Hayward, C. C., Ibar, E., Koekemoer, A. M., Lemaux, B. C., Magdis, G. E., Molina, J., Talia, M., Vallini, L., Vergani, D., Zamorani, G. |
| المصدر: | A&A 686, A187 (2024) |
| سنة النشر: | 2024 |
| المجموعة: | Astrophysics |
| مصطلحات موضوعية: | Astrophysics - Astrophysics of Galaxies |
| الوصف: | Measurements of the size of dust continuum emission are an important tool for constraining the spatial extent of star formation and hence the build-up of stellar mass. Compact dust emission has generally been observed at Cosmic Noon (z~2-3). However, at earlier epochs, toward the end of the Reionization (z~4-6), only the sizes of a handful of IR-bright galaxies have been measured. In this work, we derive the dust emission sizes of main-sequence galaxies at z~5 from the ALPINE survey. We measure the dust effective radius r_e,FIR in the uv-plane in Band 7 of ALMA for seven ALPINE galaxies with resolved emission and we compare it with rest-frame UV and [CII]158$\mu$m measurements. We study the r_e,FIR-L_IR scaling relation by considering our dust size measurements and all the data in literature at z~4-6. Finally, we compare our size measurements with predictions from simulations. The dust emission in the selected ALPINE galaxies is rather extended (r_e,FIR~1.5-3 kpc), similar to [CII]158 um but a factor of ~2 larger than the rest-frame UV emission. Putting together all the measurements at z~5, spanning 2 decades in luminosity from L_IR ~ 10^11 L_sun to L_IR ~ 10^13 L_sun, the data highlight a steeply increasing trend of the r_e,FIR-L_IR relation at L_IR< 10^12 L_sun, followed by a downturn and a decreasing trend at brighter luminosities. Finally, simulations that extend up to the stellar masses of the ALPINE galaxies considered in the present work predict a sub-set of galaxies (~25% at 10^10 M_sun < M_star < 10^11 M_sun) with sizes as large as those measured. Comment: 8 pages, Accepted by A&A |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1051/0004-6361/202348996 |
| URL الوصول: | http://arxiv.org/abs/2403.13490 |
| رقم الأكسشن: | edsarx.2403.13490 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1051/0004-6361/202348996 |
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