The ALMA Frontier Fields Survey V. ALMA Stacking of Lyman-Break Galaxies in Abell 2744, Abell 370, Abell S1063, MACSJ0416.1-2403 and MACSJ1149.5+2223

被引：10

作者：

Carvajal, R. ^{[1
,2
]}

Bauer, F. E. ^{[1
,2
,3
,4
]}

Bouwens, R. J. ^{[5
]}

Oesch, P. A. ^{[6
]}

Gonzalez-Lopez, J. ^{[1
,7
]}

Anguita, T. ^{[3
,8
]}

Aravena, M. ^{[7
]}

Demarco, R. ^{[9
]}

Guaita, L. ^{[1
,7
]}

Infante, L. ^{[1
,2
,10
]}

Kim, S. ^{[1
]}

Kneissl, R. ^{[12
,13
]}

Koekemoer, A. M. ^{[11
]}

Messias, H. ^{[12
,13
]}

Treister, E. ^{[1
]}

Villard, E. ^{[12
,13
]}

Zitrin, A. ^{[14
]}

Troncoso, P. ^{[15
]}

机构：

[1] Pontificia Univ Catolica Chile, Inst Astrofis, Casilla 306, Santiago 22, Chile

[2] Pontificia Univ Catolica Chile, Ctr Astroingn, Casilla 306, Santiago 22, Chile

[3] Millennium Inst Astrophys MAS, Av Vicuna Mackenna 4860, Santiago, Chile

[4] Space Sci Inst, 4750 Walnut St,Suite 205, Boulder, CO 80301 USA

[5] Leiden Univ, Leiden Observ, NL-2300 RA Leiden, Netherlands

[6] Univ Geneva, Geneva Observ, Ch Maillettes 51, CH-1290 Versoix, Switzerland

[7] Univ Diego Portales, Nucleo Astron, Fac Ingn & Ciencias, Av Ejercito Libertador 441, Santiago, Chile

[8] Univ Andres Bello, Dept Ciencias Fis, Fernandez Concha 700, Santiago, Chile

[9] Univ Concepcion, Fac Ciencias Fis & Matemat, Dept Astron, Concepcion, Chile

[10] Las Campanas Observ, Carnegie Inst Sci, Casilla 601,Colina El Pino S-N, La Serena, Chile

[11] Space Telescope Sci Inst, 3700 San Martin Dr, Baltimore, MD 21218 USA

[12] Joint Alma Observ, Alonso de Cordova 3107,Vitacura 763-0355, Santiago, Chile

[13] European Southern Observ, Alonso de Cordova 3107,Casilla 19001, Santiago, Chile

[14] Ben Gurion Univ Negev, Phys Dept, POB 653, IL-8410501 Beer Sheva, Israel

[15] Univ Autonoma Chile, Fac Ingn, Nucleo Astroquim & Astrofis, Av Pedro de Valdivia 425, Santiago, Chile

来源：

ASTRONOMY & ASTROPHYSICS | 2020年 / 633卷

关键词：

galaxies: high-redshift; galaxies: clusters: general; submillimetre: galaxies; gravitational lensing: strong; COSMIC STAR-FORMATION; FALSE-DISCOVERY RATE; ULTRAVIOLET LUMINOSITY DENSITY; STRONG-LENSING ANALYSIS; MU-M OBSERVATIONS; SIMILAR-TO; DUST ATTENUATION; H-ALPHA; NONPARAMETRIC INVERSION; MASSIVE GALAXIES;

D O I：

10.1051/0004-6361/201936260

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Context. The Hubble Frontier Fields offer an exceptionally deep window into the high-redshift universe, covering a substantially larger area than the Hubble Ultra-Deep field at low magnification and probing 1-2 mag deeper in exceptional high-magnification regions. This unique parameter space, coupled with the exceptional multi-wavelength ancillary data, can facilitate for useful insights into distant galaxy populations. Aims. We aim to leverage Atacama Large Millimetre Array (ALMA) band 6 (approximate to 263 GHz) mosaics in the central portions of five Frontier Fields to characterize the infrared (IR) properties of 1582 ultraviolet (UV)-selected Lyman-Break Galaxies (LBGs) at redshifts of z similar to 2-8. We investigated individual and stacked fluxes and IR excess (IRX) values of the LBG sample as functions of stellar mass (M-& x22c6;), redshift, UV luminosity and slope beta, and lensing magnification. Methods. LBG samples were derived from color-selection and photometric redshift estimation with Hubble Space Telescope photometry. Spectral energy distributions -templates were fit to obtain luminosities, stellar masses, and star formation rates for the LBG candidates. We obtained individual IR flux and IRX estimates, as well as stacked averages, using both ALMA images and u-v visibilities. Results. Two (2) LBG candidates were individually detected above a significance of 4.1-sigma, while stacked samples of the remaining LBG candidates yielded no significant detections. We investigated our detections and upper limits in the context of the IRX-M-star and IRX-beta relations, probing at least one dex lower in stellar mass than past studies have done. Our upper limits exclude substantial portions of parameter space and they are sufficiently deep in a handful of cases to create mild tension with the typically assumed attenuation and consensus relations. We observe a clear and smooth trend between M-star and beta, which extends to low masses and blue (low) beta values, consistent with expectations from previous works.

引用

页数：28

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