2007ApJ...665..921F

Query : 2007ApJ...665..921F

2007ApJ...665..921F - Astrophys. J., 665, 921-935 (2007/August-3)

The Sextet Arcs: a strongly lensed Lyman break galaxy in the ACS spectroscopic galaxy survey toward Abell 1689.

FRYE B.L., COE D., BOWEN D.V., BENITEZ N., BROADHURST T., GUHATHAKURTA P., ILLINGWORTH G., MENANTEAU F., SHARON K., LUPTON R., MEYLAN G., ZEKSER K., MEURER G. and HURLEY M.

Abstract (from CDS):

We present results of the HST Advanced Camera for Surveys spectroscopic ground-based redshift survey in the field of A1689. We measure 98 redshifts, increasing the number of spectroscopically confirmed objects sixfold. We present two spectra from this catalog of the Sextet Arcs, images that arise from a strongly lensed Lyman break galaxy (LBG) at a redshift of z=3.038. Gravitational lensing by the cluster magnifies its flux by a factor of ∼16 and produces six separate images with a total r-band magnitude of r625=21.7. The two spectra, each of which represents emission from different regions of the LBG, show H I and interstellar metal absorption lines at the systemic redshift. Significant variations are seen in the Lyα profile across a single galaxy, ranging from strong absorption to a combination of emission plus absorption. A spectrum of a third image close to the brightest arc shows Lyα emission at the same redshift as the LBG, arising from either another spatially distinct region of the galaxy or from a companion galaxy close to the LBG. Taken as a group, the Lyα equivalent width in these three spectra decreases with increasing equivalent width of the strongest interstellar absorption lines. We discuss how these variations can be used to understand the physical conditions in the LBG. Intrinsically, this LBG is faint, ∼0.1L*, and is forming stars at a modest rate, ∼4 M☉/yr. We also detect absorption-line systems toward the Sextet Arcs at z=2.873 and z=2.534. The latter system is seen across two of our spectra.

Abstract Copyright: ∼

Journal keyword(s): Galaxies: Clusters: General - Galaxies: Clusters: Individual: Alphanumeric: A1689 - Galaxies: High-Redshift - Cosmology: Gravitational Lensing - Methods: Data Analysis - Techniques: Spectroscopic

VizieR on-line data: <Available at CDS (J/ApJ/665/921): table1.dat table3.dat>

Nomenclature: Tables 1, 3: [FCB2007] JHHMMSS.sss+DDMMSS.ss N=15+91.

CDS comments: The Sextet Arcs = NAME ACO 1689 SEXTET ARCS in SIMBAD.

Simbad objects: 126

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Number of rows : 126
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 QSO J0003-2603 QSO 00 03 22.9531962024 -26 03 18.304471908   18 17.53     ~ 293 0
2 SAS-LBG Q0000-D6 G 00 03 23.79 -26 02 48.5           ~ 18 0
3 NAME 8 O'Clock Arc blu 00 22 40.77984 +14 31 13.9548           ~ 66 0
4 NAME Hubble Ultra Deep Field reg 03 32 39.0 -27 47 29           ~ 1900 0
5 CD-32 5613 WD* 08 41 32.4290850497 -32 56 32.915823461   12.07 11.85 12.3   DA5.5 325 0
6 NAME ACO 1689 Sextet Arcs G 13 11.0 -01 20           ~ 4 1
7 [FCB2007] J131119.289-011943.42 G 13 11 19.289 -01 19 43.42         22.83 ~ 1 0
8 [FCB2007] J131120.231-012001.10 G 13 11 20.231 -01 20 01.10         22.51 ~ 1 0
9 [FCB2007] J131120.346-012115.94 G 13 11 20.346 -01 21 15.94         21.90 ~ 1 0
10 [FCB2007] J131121.056-011731.19 G 13 11 21.056 -01 17 31.19         21.41 ~ 1 0
11 [FCB2007] J131121.503-011747.40 G 13 11 21.503 -01 17 47.40         22.80 ~ 1 0
12 [FCB2007] J131121.853-011726.80 G 13 11 21.853 -01 17 26.80         23.14 ~ 1 0
13 [FCB2007] J131122.523-012039.43 G 13 11 22.4720 -01 20 39.220         23.03 ~ 2 0
14 [FCB2007] J131122.781-011901.65 G 13 11 22.781 -01 19 01.65         24.06 ~ 1 0
15 [FCB2007] J131122.843-011706.32 G 13 11 22.843 -01 17 06.32         22.33 ~ 1 0
16 [FCB2007] J131124.066-011847.17 G 13 11 24.066 -01 18 47.17           ~ 1 0
17 [MBC96] ACO 1689 633 GiC 13 11 24.104 -01 18 52.65         21.96 ~ 1 0
18 [MBC96] ACO 1689 461 GiC 13 11 24.1860 -01 19 56.550         21.34 ~ 2 0
19 [FCB2007] J131124.240-011952.68 G 13 11 24.2400 -01 19 52.680         21.91 ~ 2 0
20 [FCB2007] J131124.367-011936.87 G 13 11 24.3980 -01 19 36.880         23.75 ~ 2 0
21 [MBC96] ACO 1689 559 GiC 13 11 24.6090 -01 19 20.830         24.16 ~ 2 0
22 [MBC96] ACO 1689 442 GiC 13 11 24.6520 -01 20 03.380     22.65   21.33 ~ 3 0
23 [FCB2007] J131124.802-012023.08 * 13 11 24.8020 -01 20 23.070         21.84 ~ 2 0
24 [FCB2007] J131124.960-011936.61 G 13 11 24.9600 -01 19 36.610         24.23 ~ 2 0
25 [CBB2010b] A1689 368 LeG 13 11 25.4470 -01 20 51.740           ~ 16 0
26 [FCB2007] J131125.617-011801.21 G 13 11 25.617 -01 18 01.21         22.61 ~ 1 0
27 [MIH2005] 5 GiC 13 11 25.73 -01 21 14.8           ~ 2 0
28 SDSS J131126.22-011956.4 GiC 13 11 26.2298261112 -01 19 56.444102400   20.57 19.14 18.40 18.10 ~ 10 0
29 [BBC2005] 1.2 LeG 13 11 26.289 -01 20 00.19           ~ 8 1
30 [CBB2010b] A1689 308 LeG 13 11 26.4410 -01 19 56.940           ~ 10 1
31 [BBC2005] 2.1 LeG 13 11 26.5410 -01 19 55.700           ~ 11 0
32 [FCB2007] J131126.714-011937.49 G 13 11 26.6830 -01 19 36.770         21.0 ~ 2 0
33 [FCB2007] J131126.919-012000.65 * 13 11 26.9190 -01 20 00.650         22.35 ~ 2 0
34 [MBC96] ACO 1689 646 GiC 13 11 27.0840 -01 18 48.880   21.86 20.72 20.01 19.84 ~ 7 0
35 [MBC96] ACO 1689 712 GiC 13 11 27.1910 -01 18 26.550         22.09 ~ 2 0
36 [FHB2012] ELS 11324 EmG 13 11 27.2040 -01 18 49.920         21.5 ~ 3 0
37 DES J131127.84-012007.6 GiC 13 11 27.8458620792 -01 20 07.682470836   19.63 18.21 17.50 17.48 ~ 14 0
38 [FCB2007] J131128.221-012050.93 G 13 11 28.2210 -01 20 50.930         22.00 ~ 2 0
39 [FCB2007] J131128.325-011827.50 G 13 11 28.3250 -01 18 27.500   22.94 21.67   20.59 ~ 3 0
40 [FCB2007] J131128.547-012302.85 G 13 11 28.547 -01 23 02.85         23.76 ~ 1 0
41 [FCB2007] J131128.685-011737.54 G 13 11 28.685 -01 17 37.54         22.38 ~ 1 0
42 [FCB2007] J131128.886-012001.94 G 13 11 28.8860 -01 20 01.940         21.05 ~ 2 0
43 [GH91] 62 GiC 13 11 29.0922155184 -01 19 46.927635528         19.31 ~ 3 0
44 ACO 1689 ClG 13 11 29.5 -01 20 28           ~ 1178 0
45 [BBC2005] 1.3 LeG 13 11 29.773 -01 21 07.43           ~ 7 1
46 [BBC2005] 2.4 EmG 13 11 29.812 -01 21 06.05           ~ 11 0
47 [BBC2005] 1.6 LeG 13 11 29.852 -01 20 38.50           ~ 7 1
48 [BBC2005] 2.5 LeG 13 11 29.881 -01 20 39.48           ~ 7 0
49 [MIH2005] 3 GiC 13 11 29.9050 -01 20 05.430           ~ 3 1
50 [FBB2002] A1689 1 G 13 11 29.9690 -01 19 14.880           ~ 5 0
51 [MBC96] ACO 1689 20 GiC 13 11 30.231 -01 22 46.10         22.68 ~ 1 0
52 [GH91] 65 GiC 13 11 30.5080 -01 19 34.670         20.66 ~ 3 0
53 [FCB2007] J131130.677-011855.50 G 13 11 30.6770 -01 18 55.500         23.85 ~ 2 0
54 [BCS2002] 23 GiC 13 11 30.7510 -01 21 38.780   21.89 21.46   20.32 ~ 5 0
55 [MIH2005] 4 GiC 13 11 31.09 -01 21 42.1           ~ 2 0
56 [GH91] 168 GiC 13 11 31.4720 -01 21 05.940         20.62 ~ 3 0
57 [FCB2007] J131131.622-012321.20 G 13 11 31.582 -01 23 21.28         21.23 ~ 2 0
58 [MBC96] ACO 1689 810 GiC 13 11 31.824 -01 17 49.29         21.12 ~ 1 0
59 [BBC2005] 1.5 LeG 13 11 31.932 -01 20 05.91           ~ 6 1
60 [BBC2005] 2.3 LeG 13 11 31.978 -01 20 07.17           ~ 8 0
61 [BCS2002] 27 GiC 13 11 32.0560 -01 21 55.410         21.10 ~ 4 0
62 [FCB2007] J131132.424-012418.19 G 13 11 32.424 -01 24 18.19         24.17 ~ 1 0
63 [BBC2005] 2.2 LeG 13 11 32.969 -01 20 25.51           ~ 8 0
64 [FCB2007] J131133.028-011914.64 G 13 11 33.0280 -01 19 14.650         22.98 ~ 2 0
65 [CBB2010b] A1689 307 LeG 13 11 33.0650 -01 20 27.450           ~ 6 1
66 [MIH2005] 2 * 13 11 33.11 -01 19 22.5           ~ 5 0
67 [CBB2010b] A1689 395 GiC 13 11 33.2340 -01 19 17.000   23.18 21.55 20.83 20.20 ~ 4 0
68 [FCB2007] J131133.555-011901.50 G 13 11 33.5550 -01 19 01.500         22.11 ~ 2 0
69 [FCB2007] J131133.632-012202.00 G 13 11 33.6210 -01 22 02.190         22.92 ~ 2 0
70 [FCB2007] J131133.950-011915.75 G 13 11 33.9500 -01 19 15.750         22.48 ~ 3 0
71 [FCB2007] J131134.211-011923.98 G 13 11 34.2420 -01 19 23.970         22.44 ~ 2 0
72 [FCB2007] J131134.318-011904.93 G 13 11 34.3280 -01 19 05.100         22.60 ~ 2 0
73 [FCB2007] J131134.900-011835.62 G 13 11 34.900 -01 18 35.62         22.31 ~ 1 0
74 [FHB2012] ELS 10399 EmG 13 11 34.9940 -01 19 51.170           ~ 5 0
75 [FCB2007] J131135.057-012126.00 G 13 11 35.0880 -01 21 26.010         21.22 ~ 2 0
76 [FHB2012] ELS 1077 EmG 13 11 35.2580 -01 20 30.170     22.59   20.64 ~ 5 0
77 [FCB2007] J131135.264-011901.50 G 13 11 35.264 -01 19 01.50         22.27 ~ 1 0
78 [FCB2007] J131135.619-012152.59 G 13 11 35.619 -01 21 52.59         23.56 ~ 1 0
79 [FCB2007] J131136.052-011924.71 G 13 11 36.0520 -01 19 24.710         22.85 ~ 2 0
80 [FCB2007] J131136.370-011906.25 G 13 11 36.370 -01 19 06.25         23.66 ~ 1 0
81 [FCB2007] J131136.536-011925.03 G 13 11 36.5360 -01 19 25.030         20.50 ~ 2 0
82 [FCB2007] J131136.638-012232.72 G 13 11 36.638 -01 22 32.72         24.17 ~ 1 0
83 [FCB2007] J131137.089-011926.10 G 13 11 37.0890 -01 19 26.100         21.60 ~ 2 0
84 [FCB2007] J131137.183-012140.60 G 13 11 37.183 -01 21 40.60         21.78 ~ 1 0
85 [FCB2007] J131137.284-012106.02 G 13 11 37.284 -01 21 06.02         23.91 ~ 1 0
86 [FCB2007] J131137.577-012124.34 G 13 11 37.546 -01 21 24.40         22.02 ~ 2 0
87 [FCB2007] J131137.590-012300.70 G 13 11 37.590 -01 23 00.70         24.11 ~ 1 0
88 [FCB2007] J131137.694-011949.79 EmG 13 11 37.686 -01 19 50.02   23.12 23.08 21.95 21.16 ~ 5 0
89 [FCB2007] J131138.051-011958.25 G 13 11 38.0510 -01 19 58.250         22.18 ~ 2 0
90 [FCB2007] J131138.239-012142.05 G 13 11 38.239 -01 21 42.05   23.56 23.30 22.42 21.98 ~ 3 0
91 [FCB2007] J131138.348-012222.76 G 13 11 38.348 -01 22 22.76         24.00 ~ 1 0
92 [FCB2007] J131138.653-012138.87 G 13 11 38.653 -01 21 38.87         22.06 ~ 1 0
93 [FCB2007] J131138.690-012217.78 G 13 11 38.655 -01 22 17.91         21.77 ~ 2 0
94 [FCB2007] J131138.791-012052.17 G 13 11 38.791 -01 20 52.17         21.03 ~ 1 0
95 [FCB2007] J131138.846-012341.89 G 13 11 38.846 -01 23 41.89         20.21 ~ 1 0
96 [FCB2007] J131139.101-012345.53 G 13 11 39.101 -01 23 45.53         23.59 ~ 1 0
97 [FCB2007] J131139.472-012251.09 G 13 11 39.472 -01 22 51.09         24.21 ~ 1 0
98 [FCB2007] J131139.524-012046.21 G 13 11 39.524 -01 20 46.21         22.35 ~ 1 0
99 [FCB2007] J131139.544-012013.37 G 13 11 39.544 -01 20 13.37         24.22 ~ 1 0
100 [FCB2007] J131139.748-012255.89 G 13 11 39.748 -01 22 55.89         23.88 ~ 1 0
101 [FCB2007] J131139.804-012131.52 G 13 11 39.804 -01 21 31.52         24.19 ~ 1 0
102 [FCB2007] J131139.833-012236.47 G 13 11 39.833 -01 22 36.47         24.26 ~ 1 0
103 [FCB2007] J131139.891-012031.08 G 13 11 39.891 -01 20 31.08         23.36 ~ 1 0
104 [FCB2007] J131140.204-011852.38 G 13 11 40.166 -01 18 52.44         21.50 ~ 2 0
105 [FCB2007] J131140.284-012302.45 G 13 11 40.284 -01 23 02.45         23.91 ~ 1 0
106 [FCB2007] J131140.614-011938.24 G 13 11 40.614 -01 19 38.24         22.09 ~ 1 0
107 [FCB2007] J131141.322-012144.92 G 13 11 41.322 -01 21 44.92         22.71 ~ 1 0
108 [FCB2007] J131141.341-012239.09 G 13 11 41.341 -01 22 39.09         23.91 ~ 1 0
109 [FCB2007] J131141.620-012054.24 G 13 11 41.591 -01 20 54.40         20.35 ~ 2 0
110 [FCB2007] J131141.986-011934.47 G 13 11 41.986 -01 19 34.47         22.91 ~ 1 0
111 [AMA2011] a1689 132 G 13 11 42.154 -01 19 34.06   22.27 20.84 19.71 19.35 ~ 4 0
112 [FCB2007] J131142.301-012007.79 G 13 11 42.301 -01 20 07.79         21.66 ~ 1 0
113 [FCB2007] J131142.838-012025.94 G 13 11 42.838 -01 20 25.94         22.63 ~ 1 0
114 [FCB2007] J131143.607-012036.93 G 13 11 43.607 -01 20 36.93         23.26 ~ 1 0
115 [FCB2007] J131143.825-011938.76 G 13 11 43.825 -01 19 38.76         22.85 ~ 1 0
116 [FCB2007] J131144.466-012030.58 G 13 11 44.466 -01 20 30.58         22.72 ~ 1 0
117 [FCB2007] J131146.056-012051.94 G 13 11 46.025 -01 20 52.37           ~ 2 0
118 ClG J1514+3636 ClG 15 14 22.0 +36 36 22     19.0     ~ 136 0
119 NAME MS 1512-cB58 AGN 15 14 22.2751 +36 36 25.674     20.64   20.35 ~ 326 0
120 FIRST J151422.4+363620 rG 15 14 22.482 +36 36 21.08           ~ 146 1
121 BOW ACO 2218 CC293 LeI 16 35 49.179 +66 13 06.51           ~ 23 0
122 ACO 2218 ClG 16 35 54.0 +66 13 00           ~ 827 1
123 NAME Cosmic Eye G 21 35 12.730 -01 01 42.90           ~ 92 0
124 [FBB2002] A2390 1 G 21 53 33.669 +17 42 04.18           ~ 2 0
125 ACO 2390 ClG 21 53 37.4 +17 41 46           ~ 732 2
126 [MSS2001] A G ~ ~           ~ 3 0

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