SXDF-ALMA 2-arcmin^2 Deep Survey: Stacking of Rest-Frame Near-Infrared Selected Objects
| Autor: | Grant W. Wilson, David P. Hughes, Rob Ivison, James Dunlop, Tadayuki Kodama, Kentaro Motohara, Daisuke Iono, Wei-Hao Wang, Kouichiro Nakanish, Kouji Ohta, Hideki Umehata, Bau-Ching Hsieh, Jean Coupon, Min S. Yun, Karina Caputi, Ryu Makiya, Yoichi Tamura, Soh Ikarashi, Yuki Yamaguchi, Minju Lee, Ken-ichi Tadaki, Yuichi Matsuda, Sebastien Foucaud, Kotaro Kohno, Itziar Aretxaga, Bunyo Hatsukade, Wiphu Rujopakarn |
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| Přispěvatelé: | Astronomy |
| Rok vydání: | 2016 |
| Předmět: |
submillimeter: galaxies
Stellar mass Extinction (astronomy) MU-M galaxies [submillimeter] FOS: Physical sciences Astrophysics cosmic background radiation 01 natural sciences galaxies: high-redshift 0103 physical sciences STAR-FORMING GALAXIES Surface brightness FIELD NUMBER COUNTS SOURCE CATALOG 010303 astronomy & astrophysics evolution [galaxies] Physics LEGACY SURVEY 010308 nuclear & particles physics Star formation Near-infrared spectroscopy CANDELS Astronomy and Astrophysics Astrophysics - Astrophysics of Galaxies Galaxy Redshift EXTRAGALACTIC BACKGROUND LIGHT FAINT SUBMILLIMETER GALAXIES Extragalactic background light Space and Planetary Science Astrophysics of Galaxies (astro-ph.GA) HIGH-REDSHIFT galaxies: evolution high-redshift [galaxies] |
| Zdroj: | The Astrophysical Journal Wang, W H, Kohno, K, Hatsukade, B, Umehata, H, Aretxaga, I, Hughes, D, Caputi, K I, Dunlop, J S, Ikarashi, S, Iono, D, Ivison, R J, Lee, M, Makiya, R, Matsuda, Y, Motohara, K, Nakanish, K, Ohta, K, Tadaki, K I, Tamura, Y, Kodama, T, Rujopakarn, W, Wilson, G W, Yamaguchi, Y, Yun, M S, Coupon, J, Hsieh, B C & Foucaud, S 2016, ' THE SXDF-ALMA 2 arcmin 2 DEEP SURVEY : STACKING REST-FRAME NEAR-INFRARED SELECTED OBJECTS ', Astrophysical Journal, vol. 833, no. 2, 195 . https://doi.org/10.3847/1538-4357/833/2/195 The Astrophysical Journal, 833(2):195. IOP PUBLISHING LTD |
| ISSN: | 0004-637X 1538-3881 0067-0049 0004-6361 |
| DOI: | 10.48550/arxiv.1609.08772 |
| Popis: | We present stacking analyses on our ALMA deep 1.1 mm imaging in the SXDF using 1.6 {\mu}m and 3.6 {\mu}m selected galaxies in the CANDELS WFC3 catalog. We detect a stacked flux of ~0.03-0.05 mJy, corresponding to LIR < 10^11 Lsun and a star formation rate (SFR) of ~ 15 Msun/yr at z = 2. We find that galaxies brighter in the rest-frame near-infrared tend to be also brighter at 1.1 mm, and galaxies fainter than m[3.6um] = 23 do not produce detectable 1.1 mm emission. This suggests a correlation between stellar mass and SFR, but outliers to this correlation are also observed, suggesting strongly boosted star formation or extremely large extinction. We also find tendencies that redder galaxies and galaxies at higher redshifts are brighter at 1.1 mm. Our field contains z ~ 2.5 H-alpha emitters and a bright single-dish source. However, we do not find evidence of bias in our results caused by the bright source. By combining the fluxes of sources detected by ALMA and fluxes of faint sources detected with stacking, we recover a 1.1 mm surface brightness of up to 20.3 +/- 1.2 Jy/deg, comparable to the extragalactic background light measured by COBE. Based on the fractions of optically faint sources in our and previous ALMA studies and the COBE measurements, we find that approximately half of the cosmic star formation may be obscured by dust and missed by deep optical surveys, Much deeper and wider ALMA imaging is therefore needed to better constrain the obscured cosmic star formation history. Comment: accepted for publication in ApJ |
| Databáze: | OpenAIRE |
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