التفاصيل البيبلوغرافية
| العنوان: |
ALMA Lensing Cluster Survey: ALMA-Herschel Joint Study of Lensed Dusty Star-forming Galaxies across z ≠0.5 â€" 6. |
| المؤلفون: |
Sun, Fengwu, Egami, Eiichi, Fujimoto, Seiji, Rawle, Timothy, Bauer, Franz E., Kohno, Kotaro, Smail, Ian, Pérez-González, Pablo G., Ao, Yiping, Chapman, Scott C., Combes, Francoise, Dessauges-Zavadsky, Miroslava, Espada, Daniel, González-López, Jorge, Koekemoer, Anton M., Kokorev, Vasily, Lee, Minju M., Morokuma-Matsui, Kana, Muñoz Arancibia, Alejandra M., Oguri, Masamune |
| المصدر: |
Astrophysical Journal; 5/24/2022, Vol. 932 Issue 2, p1-36, 36p |
| مصطلحات موضوعية: |
GALAXIES, SPECTRAL energy distribution, GALAXY clusters, STAR formation, ACTINIC flux, GALACTIC evolution, COSMIC dust |
| مستخلص: |
We present an ALMA-Herschel joint analysis of sources detected by the ALMA Lensing Cluster Survey (ALCS) at 1.15 mm. Herschel/PACS and SPIRE data at 100â€"500 ÎĽ m are deblended for 180 ALMA sources in 33 lensing cluster fields that are detected either securely (141 sources; in our main sample) or tentatively at S/N ≥ 4 with cross-matched HST/Spitzer counterparts, down to a delensed 1.15 mm flux density of âĽ0.02 mJy. We performed far-infrared spectral energy distribution modeling and derived the physical properties of dusty star formation for 125 sources (109 independently) that are detected at >2 Ď in at least one Herschel band. A total of 27 secure ALCS sources are not detected in any Herschel bands, including 17 optical/near-IR-dark sources that likely reside at z = 4.2 ± 1.2. The 16th, 50th, and 84th percentiles of the redshift distribution are 1.15, 2.08, and 3.59, respectively, for ALCS sources in the main sample, suggesting an increasing fraction of z ≠1 â' 2 galaxies among fainter millimeter sources (f 1150 ⼠0.1 mJy). With a median lensing magnification factor of ÎĽ = 2.6 â' 0.8 + 2.6 , ALCS sources in the main sample exhibit a median intrinsic star formation rate of 94 â' 54 + 84 M ⊙ yrâ'1, lower than that of conventional submillimeter galaxies at similar redshifts by a factor of âĽ3. Our study suggests weak or no redshift evolution of dust temperature with L IR < 1012 L ⊙ galaxies within our sample at z ≠0 â' 2. At L IR > 1012 L ⊙, the dust temperatures show no evolution across z ≠1â€"4 while being lower than those in the local universe. For the highest-redshift source in our sample (z = 6.07), we can rule out an extreme dust temperature (>80 K) that was reported for MACS0416 Y1 at z = 8.31. [ABSTRACT FROM AUTHOR] |
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