Clash: Z ~ 6 young galaxy candidate quintuply lensed by the frontier field cluster RXC J2248.7-4431

A. Monna; S. Seitz; N. Greisel; T. Eichner; N. Drory; M. Postman; A. Zitrin; D. Coe; A. Halkola; S. H. Suyu; C. Grillo; P. Rosati; D. Lemze; I. Balestra; J. Snigula; L. Bradley; K. Umetsu; A. Koekemoer; U. Kuchner; L. Moustakas; M. Bartelmann; N. Benítez; R. Bouwens; T. Broadhurst; M. Donahue; H. Ford; O. Host; L. Infante; Y. Jimenez-Teja; S. Jouvel; D. Kelson; O. Lahav; E. Medezinski; P. Melchior; M. Meneghetti; J. Merten; A. Molino; J. Moustakas; M. Nonino; W. Zheng

doi:10.1093/mnras/stt2284

Clash: Z ~ 6 young galaxy candidate quintuply lensed by the frontier field cluster RXC J2248.7-4431

A. Monna, S. Seitz, N. Greisel, T. Eichner, N. Drory, M. Postman, A. Zitrin, D. Coe, A. Halkola, S. H. Suyu, C. Grillo, P. Rosati, D. Lemze, I. Balestra, J. Snigula, L. Bradley, K. Umetsu, A. Koekemoer, U. Kuchner, L. MoustakasM. Bartelmann, N. Benítez, R. Bouwens, T. Broadhurst, M. Donahue, H. Ford, O. Host, L. Infante, Y. Jimenez-Teja, S. Jouvel, D. Kelson, O. Lahav, E. Medezinski, P. Melchior, M. Meneghetti, J. Merten, A. Molino, J. Moustakas, M. Nonino, W. Zheng

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Abstract

We present a quintuply lensed z ~ 6 candidate discovered in the field of the galaxy cluster RXC J2248.7-4431 (z ~ 0.348) targeted within the Cluster Lensing and Supernova survey with Hubble (CLASH) and selected in the deep Hubble Space Telescope (HST) frontier fields survey. Thanks to the CLASH 16-band HST imaging, we identify the quintuply lensed z ~ 6 candidate as an optical dropout in the inner region of the cluster, the brightest image having mag_AB = 24.8 ± 0.1 in the f105w filter. We perform a detailed photometric analysis to verify its high-z and lensed nature. We get as photometric redshift z_ph ~ 5.9, and given the extended nature and NIR colours of the lensed images, we rule out low-z early-type and galactic star contaminants.We perform a strong lensing analysis of the cluster, using 13 families of multiple lensed images identified in the HST images. Our final best model predicts the high-z quintuply lensed system with a position accuracy of 0.8 arcsec. The magnifications of the five images are between 2.2 and 8.3, which leads to a delensedUVluminosity of L₁₆₀₀ ~ 0.5L ^* ₁₆₀₀ at z=6.We also estimate the UV slope from the observed NIR colours, finding a steep β =-2.89 ± 0.38. We use singular and composite stellar population SEDs to fit the photometry of the high-z candidate, and we conclude that it is a young (age<300 Myr) galaxy with mass ofM~10⁸ M_⊙, subsolar metallicity (Z < 0.2 Z_⊙) and low dust content (A_V ~ 0.2-0.4).

Original language	English (US)
Pages (from-to)	1417-1434
Number of pages	18
Journal	Monthly Notices of the Royal Astronomical Society
Volume	438
Issue number	2
DOIs	https://doi.org/10.1093/mnras/stt2284
State	Published - Mar 2014
Externally published	Yes

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

Keywords

Galaxies: clusters: general
Galaxies: high-redshift
Gravitational lensing: strong

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10.1093/mnras/stt2284

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Monna, A., Seitz, S., Greisel, N., Eichner, T., Drory, N., Postman, M., Zitrin, A., Coe, D., Halkola, A., Suyu, S. H., Grillo, C., Rosati, P., Lemze, D., Balestra, I., Snigula, J., Bradley, L., Umetsu, K., Koekemoer, A., Kuchner, U., ... Zheng, W. (2014). Clash: Z ~ 6 young galaxy candidate quintuply lensed by the frontier field cluster RXC J2248.7-4431. Monthly Notices of the Royal Astronomical Society, 438(2), 1417-1434. https://doi.org/10.1093/mnras/stt2284

@article{f0a4649b0d2846ab9168297be522f495,

title = "Clash: Z ~ 6 young galaxy candidate quintuply lensed by the frontier field cluster RXC J2248.7-4431",

abstract = "We present a quintuply lensed z ~ 6 candidate discovered in the field of the galaxy cluster RXC J2248.7-4431 (z ~ 0.348) targeted within the Cluster Lensing and Supernova survey with Hubble (CLASH) and selected in the deep Hubble Space Telescope (HST) frontier fields survey. Thanks to the CLASH 16-band HST imaging, we identify the quintuply lensed z ~ 6 candidate as an optical dropout in the inner region of the cluster, the brightest image having magAB = 24.8 ± 0.1 in the f105w filter. We perform a detailed photometric analysis to verify its high-z and lensed nature. We get as photometric redshift zph ~ 5.9, and given the extended nature and NIR colours of the lensed images, we rule out low-z early-type and galactic star contaminants.We perform a strong lensing analysis of the cluster, using 13 families of multiple lensed images identified in the HST images. Our final best model predicts the high-z quintuply lensed system with a position accuracy of 0.8 arcsec. The magnifications of the five images are between 2.2 and 8.3, which leads to a delensedUVluminosity of L1600 ~ 0.5L * 1600 at z=6.We also estimate the UV slope from the observed NIR colours, finding a steep β =-2.89 ± 0.38. We use singular and composite stellar population SEDs to fit the photometry of the high-z candidate, and we conclude that it is a young (age<300 Myr) galaxy with mass ofM~108 M⊙, subsolar metallicity (Z < 0.2 Z⊙) and low dust content (AV ~ 0.2-0.4).",

keywords = "Galaxies: clusters: general, Galaxies: high-redshift, Gravitational lensing: strong",

author = "A. Monna and S. Seitz and N. Greisel and T. Eichner and N. Drory and M. Postman and A. Zitrin and D. Coe and A. Halkola and Suyu, {S. H.} and C. Grillo and P. Rosati and D. Lemze and I. Balestra and J. Snigula and L. Bradley and K. Umetsu and A. Koekemoer and U. Kuchner and L. Moustakas and M. Bartelmann and N. Ben{\'i}tez and R. Bouwens and T. Broadhurst and M. Donahue and H. Ford and O. Host and L. Infante and Y. Jimenez-Teja and S. Jouvel and D. Kelson and O. Lahav and E. Medezinski and P. Melchior and M. Meneghetti and J. Merten and A. Molino and J. Moustakas and M. Nonino and W. Zheng",

year = "2014",

month = mar,

doi = "10.1093/mnras/stt2284",

language = "English (US)",

volume = "438",

pages = "1417--1434",

journal = "Monthly Notices of the Royal Astronomical Society",

issn = "0035-8711",

publisher = "Oxford University Press",

number = "2",

}

Monna, A, Seitz, S, Greisel, N, Eichner, T, Drory, N, Postman, M, Zitrin, A, Coe, D, Halkola, A, Suyu, SH, Grillo, C, Rosati, P, Lemze, D, Balestra, I, Snigula, J, Bradley, L, Umetsu, K, Koekemoer, A, Kuchner, U, Moustakas, L, Bartelmann, M, Benítez, N, Bouwens, R, Broadhurst, T, Donahue, M, Ford, H, Host, O, Infante, L, Jimenez-Teja, Y, Jouvel, S, Kelson, D, Lahav, O, Medezinski, E, Melchior, P, Meneghetti, M, Merten, J, Molino, A, Moustakas, J, Nonino, M & Zheng, W 2014, 'Clash: Z ~ 6 young galaxy candidate quintuply lensed by the frontier field cluster RXC J2248.7-4431', Monthly Notices of the Royal Astronomical Society, vol. 438, no. 2, pp. 1417-1434. https://doi.org/10.1093/mnras/stt2284

TY - JOUR

T1 - Clash

T2 - Z ~ 6 young galaxy candidate quintuply lensed by the frontier field cluster RXC J2248.7-4431

AU - Monna, A.

AU - Seitz, S.

AU - Greisel, N.

AU - Eichner, T.

AU - Drory, N.

AU - Postman, M.

AU - Zitrin, A.

AU - Coe, D.

AU - Halkola, A.

AU - Suyu, S. H.

AU - Grillo, C.

AU - Rosati, P.

AU - Lemze, D.

AU - Balestra, I.

AU - Snigula, J.

AU - Bradley, L.

AU - Umetsu, K.

AU - Koekemoer, A.

AU - Kuchner, U.

AU - Moustakas, L.

AU - Bartelmann, M.

AU - Benítez, N.

AU - Bouwens, R.

AU - Broadhurst, T.

AU - Donahue, M.

AU - Ford, H.

AU - Host, O.

AU - Infante, L.

AU - Jimenez-Teja, Y.

AU - Jouvel, S.

AU - Kelson, D.

AU - Lahav, O.

AU - Medezinski, E.

AU - Melchior, P.

AU - Meneghetti, M.

AU - Merten, J.

AU - Molino, A.

AU - Moustakas, J.

AU - Nonino, M.

AU - Zheng, W.

PY - 2014/3

Y1 - 2014/3

N2 - We present a quintuply lensed z ~ 6 candidate discovered in the field of the galaxy cluster RXC J2248.7-4431 (z ~ 0.348) targeted within the Cluster Lensing and Supernova survey with Hubble (CLASH) and selected in the deep Hubble Space Telescope (HST) frontier fields survey. Thanks to the CLASH 16-band HST imaging, we identify the quintuply lensed z ~ 6 candidate as an optical dropout in the inner region of the cluster, the brightest image having magAB = 24.8 ± 0.1 in the f105w filter. We perform a detailed photometric analysis to verify its high-z and lensed nature. We get as photometric redshift zph ~ 5.9, and given the extended nature and NIR colours of the lensed images, we rule out low-z early-type and galactic star contaminants.We perform a strong lensing analysis of the cluster, using 13 families of multiple lensed images identified in the HST images. Our final best model predicts the high-z quintuply lensed system with a position accuracy of 0.8 arcsec. The magnifications of the five images are between 2.2 and 8.3, which leads to a delensedUVluminosity of L1600 ~ 0.5L * 1600 at z=6.We also estimate the UV slope from the observed NIR colours, finding a steep β =-2.89 ± 0.38. We use singular and composite stellar population SEDs to fit the photometry of the high-z candidate, and we conclude that it is a young (age<300 Myr) galaxy with mass ofM~108 M⊙, subsolar metallicity (Z < 0.2 Z⊙) and low dust content (AV ~ 0.2-0.4).

AB - We present a quintuply lensed z ~ 6 candidate discovered in the field of the galaxy cluster RXC J2248.7-4431 (z ~ 0.348) targeted within the Cluster Lensing and Supernova survey with Hubble (CLASH) and selected in the deep Hubble Space Telescope (HST) frontier fields survey. Thanks to the CLASH 16-band HST imaging, we identify the quintuply lensed z ~ 6 candidate as an optical dropout in the inner region of the cluster, the brightest image having magAB = 24.8 ± 0.1 in the f105w filter. We perform a detailed photometric analysis to verify its high-z and lensed nature. We get as photometric redshift zph ~ 5.9, and given the extended nature and NIR colours of the lensed images, we rule out low-z early-type and galactic star contaminants.We perform a strong lensing analysis of the cluster, using 13 families of multiple lensed images identified in the HST images. Our final best model predicts the high-z quintuply lensed system with a position accuracy of 0.8 arcsec. The magnifications of the five images are between 2.2 and 8.3, which leads to a delensedUVluminosity of L1600 ~ 0.5L * 1600 at z=6.We also estimate the UV slope from the observed NIR colours, finding a steep β =-2.89 ± 0.38. We use singular and composite stellar population SEDs to fit the photometry of the high-z candidate, and we conclude that it is a young (age<300 Myr) galaxy with mass ofM~108 M⊙, subsolar metallicity (Z < 0.2 Z⊙) and low dust content (AV ~ 0.2-0.4).

KW - Galaxies: clusters: general

KW - Galaxies: high-redshift

KW - Gravitational lensing: strong

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U2 - 10.1093/mnras/stt2284

DO - 10.1093/mnras/stt2284

M3 - Article

AN - SCOPUS:84893360666

SN - 0035-8711

VL - 438

SP - 1417

EP - 1434

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

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ER -

Clash: Z ~ 6 young galaxy candidate quintuply lensed by the frontier field cluster RXC J2248.7-4431

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