2013ApJ...779...65M

Query : 2013ApJ...779...65M

2013ApJ...779...65M - Astrophys. J., 779, 65 (2013/December-2)

Narrowband Lyman-continuum imaging of galaxies at z ∼ 2.85.

MOSTARDI R.E., SHAPLEY A.E., NESTOR D.B., STEIDEL C.C., REDDY N.A. and TRAINOR R.F.

Abstract (from CDS):

We present results from a survey for z ∼ 2.85 Lyman-continuum (LyC) emission in the HS1549+1933 field and place constraints on the amount of ionizing radiation escaping from star-forming galaxies. Using a custom narrowband filter (NB3420) tuned to wavelengths just below the Lyman limit at z ≥ 2.82, we probe the LyC spectral region of 49 Lyman break galaxies (LBGs) and 91 Lyα emitters (LAEs) spectroscopically confirmed at z ≥ 2.82. Four LBGs and seven LAEs are detected in NB3420. Using V-band data probing the rest-frame nonionizing UV, we observe that many NB3420-detected galaxies exhibit spatial offsets between their LyC and nonionizing UV emission and are characterized by extremely blue NB3420-V colors, corresponding to low ratios of nonionizing to ionizing radiation (FUV/FLyC) that are in tension with current stellar population synthesis models. We measure average values of (FUV/FLyC) for our LBG and LAE samples, correcting for foreground galaxy contamination and H I absorption in the intergalactic medium. We find (FUV/FLyC)corr_LBG = 82±45 and (FUV/FLyC)corr_LAE = 7.4 ±3.6 . These flux density ratios correspond, respectively, to relative LyC escape fractions of f_esc, rel_LBG = 5% -8%, and f_esc, rel_LAE = 18% - 49% absolute LyC escape fractions of f_esc, rel_LBG = 1%-2% and f_esc, rel_LAE = 5% - 15%, and a comoving LyC emissivity from star-forming galaxies of 8.8-15.0 x1024 erg/s/Hz M/pc3. In order to study the differential properties of galaxies with and without LyC detections, we analyze narrowband Lyα imaging and rest-frame near-infrared imaging, finding that while LAEs with LyC detections have lower Lyα equivalent widths on average, there is no substantial difference in the rest-frame near-infrared colors of LBGs or LAEs with and without LyC detections. These preliminary results are consistent with an orientation-dependent model where LyC emission escapes through cleared paths in a patchy interstellar medium.

Abstract Copyright: ∼

Journal keyword(s): cosmology: observations - diffuse radiation - galaxies: high-redshift - intergalactic medium

VizieR on-line data: <Available at CDS (J/ApJ/779/65): table3.dat table4.dat table8.dat table9.dat>

Nomenclature: Table 3: [MSN2013] BXNN (No BX84), [MSN2013] MDNN N=5 among (Nos MD5-MD34), [MSN2013] CNN N=20 among (Nos C1-C27), [MSN2013] DNN N=16 among (Nos D3-D27), [MSN2013] MNN N=7 among (Nos M2-M23). Table 4: [MSN2013] laeNNNN N=91 among (Nos lae32-lae8993). Table 8: [MSN2013] GNBNNNN N=3 among (Nos 2861-5270), [MSN2013] laeNNNN N=5 among (Nos lae1670-lae7890). Table 9: [MSN2013] laeNNNN N=33 among (Nos lae759-lae7642).

Simbad objects: 172

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Number of rows : 172
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 [MSN2013] lae32 EmG 15 51 38.692 +19 10 04.89     26.78     ~ 1 0
2 [MSN2013] lae274 EmG 15 51 39.406 +19 09 42.66     25.47     ~ 1 0
3 [MSN2013] lae633 EmG 15 51 39.624 +19 11 04.99     26.78     ~ 1 0
4 [MSN2013] C1 G 15 51 39.653 +19 10 40.67     24.77     ~ 1 0
5 [MSN2013] lae413 EmG 15 51 39.673 +19 13 15.43     27.21     ~ 1 0
6 [MSN2013] lae618 EmG 15 51 39.812 +19 10 53.58     27.58     ~ 1 0
7 [MSN2013] lae367 EmG 15 51 39.993 +19 09 00.13     25.96     ~ 1 0
8 [MSN2013] lae576 EmG 15 51 40.601 +19 10 58.09     26.24     ~ 1 0
9 [MSN2013] lae599 EmG 15 51 40.758 +19 11 00.26           ~ 1 0
10 [MSN2013] C2 G 15 51 40.960 +19 13 12.77     23.76     ~ 1 0
11 [MSN2013] lae759 G 15 51 41.039 +19 09 57.61     26.79     ~ 1 0
12 [MSN2013] lae661 EmG 15 51 41.061 +19 11 54.91     26.31     ~ 1 0
13 [MSN2013] M2 G 15 51 41.355 +19 10 06.11     25.32     ~ 1 0
14 [MSN2013] lae803 G 15 51 41.598 +19 10 19.54     27.02     ~ 1 0
15 [MSN2013] lae447 EmG 15 51 41.908 +19 10 16.77     27.24     ~ 1 0
16 [MSN2013] M5 G 15 51 41.970 +19 08 22.21     25.00     ~ 1 0
17 [MSN2013] lae1012 EmG 15 51 42.495 +19 10 34.26     25.69     ~ 1 0
18 [MSN2013] lae1043 G 15 51 42.623 +19 13 00.70     27.07     ~ 1 0
19 [MSN2013] lae1058 G 15 51 42.791 +19 11 07.95     27.14     ~ 1 0
20 [MSN2013] lae1080 G 15 51 42.918 +19 12 33.53     26.37     ~ 1 0
21 [MSN2013] lae1206 EmG 15 51 43.025 +19 10 39.98     26.61     ~ 1 0
22 [MSN2013] lae1261 EmG 15 51 43.596 +19 11 57.22     26.99     ~ 1 0
23 [MSN2013] M6 G 15 51 43.678 +19 09 44.58     23.77     ~ 1 0
24 [MSN2013] D3 G 15 51 43.712 +19 09 12.37     24.06 24.22   ~ 4 0
25 [MSN2013] lae1359 EmG 15 51 43.780 +19 11 40.20     26.49     ~ 1 0
26 [MSN2013] lae1375 EmG 15 51 43.969 +19 11 02.19     27.20     ~ 1 0
27 [MSN2013] lae1500 G 15 51 43.976 +19 11 39.67     24.43     ~ 1 0
28 [MSN2013] lae1599 G 15 51 44.413 +19 11 24.75     25.01     ~ 1 0
29 [MSN2013] lae1569 G 15 51 44.416 +19 08 43.92     25.84     ~ 1 0
30 [MSN2013] lae1540 EmG 15 51 44.490 +19 11 47.22     26.88     ~ 1 0
31 [MSN2013] C5 G 15 51 44.627 +19 10 59.73     25.14     ~ 1 0
32 [MSN2013] lae1528 EmG 15 51 44.682 +19 09 24.59           ~ 1 0
33 [MSN2013] lae1552 EmG 15 51 44.709 +19 08 44.92           ~ 1 0
34 [MSN2013] C6 G 15 51 44.760 +19 10 32.84     24.36     ~ 1 0
35 [MSN2013] lae1610 EmG 15 51 44.873 +19 11 02.12     26.54     ~ 1 0
36 [MSN2013] lae1670 EmG 15 51 45.121 +19 10 15.34     27.27     ~ 2 0
37 [MSN2013] lae1679 EmG 15 51 45.164 +19 12 34.40     26.34     ~ 1 0
38 [MSN2013] D6 G 15 51 45.191 +19 09 05.31     24.64     ~ 1 0
39 [MSN2013] MD5 G 15 51 45.211 +19 11 05.13     24.96     ~ 4 0
40 [MSN2013] C7 G 15 51 45.247 +19 12 13.21     24.53     ~ 1 0
41 [MSN2013] lae1765 EmG 15 51 45.323 +19 09 29.49     26.20     ~ 1 0
42 [MSN2013] C8 G 15 51 45.386 +19 08 49.84     25.03 25.05   ~ 4 0
43 [MSN2013] lae1751 EmG 15 51 45.449 +19 11 11.71     27.12     ~ 1 0
44 [MSN2013] lae1787 EmG 15 51 45.646 +19 11 28.60     26.63     ~ 1 0
45 [MSN2013] lae1843 EmG 15 51 45.676 +19 09 58.21     27.18     ~ 2 0
46 [MSN2013] lae1803 EmG 15 51 45.697 +19 11 53.03           ~ 1 0
47 [MSN2013] lae1840 G 15 51 45.875 +19 11 55.76     27.19     ~ 1 0
48 [MSN2013] lae1835 EmG 15 51 45.882 +19 09 45.11     27.50     ~ 1 0
49 [MSN2013] lae1883 G 15 51 45.893 +19 12 23.30     26.28     ~ 1 0
50 [MSN2013] lae2063 EmG 15 51 45.966 +19 08 22.13     25.91     ~ 1 0
51 [MSN2013] D7 G 15 51 46.246 +19 09 50.11     24.51 24.31   ~ 4 0
52 [MSN2013] lae2015 EmG 15 51 46.504 +19 12 38.62           ~ 1 0
53 [MSN2013] C9 G 15 51 46.707 +19 11 52.39     23.67 23.55   ~ 2 0
54 [MSN2013] lae2174 EmG 15 51 47.001 +19 08 22.06     26.69     ~ 1 0
55 [MSN2013] lae2158 EmG 15 51 47.005 +19 11 02.98     26.11     ~ 2 0
56 [MSN2013] lae2183 EmG 15 51 47.235 +19 09 53.38     27.41     ~ 1 0
57 [MSN2013] lae2278 G 15 51 47.324 +19 12 01.54           ~ 1 0
58 [MSN2013] lae2306 G 15 51 47.521 +19 10 13.56     25.11     ~ 1 0
59 [MSN2013] lae2292 EmG 15 51 47.635 +19 10 00.50     27.19     ~ 2 0
60 [MSN2013] lae2369 G 15 51 47.863 +19 11 24.63           ~ 1 0
61 [MSN2013] lae2358 EmG 15 51 47.945 +19 09 03.21           ~ 1 0
62 [MSN2013] lae2431 G 15 51 48.048 +19 09 04.50           ~ 1 0
63 [MSN2013] lae2482 G 15 51 48.129 +19 09 48.31           ~ 1 0
64 [MSN2013] lae2489 EmG 15 51 48.187 +19 08 30.15     27.05     ~ 1 0
65 [MSN2013] lae2561 EmG 15 51 48.346 +19 13 13.88     26.13     ~ 1 0
66 [MSN2013] C10 G 15 51 48.424 +19 09 24.93     24.56 24.84   ~ 4 0
67 [MSN2013] lae2551 EmG 15 51 48.539 +19 12 03.11     27.08     ~ 1 0
68 [MSN2013] lae2664 G 15 51 49.090 +19 11 00.51           ~ 1 0
69 [MSN2013] lae2668 EmG 15 51 49.100 +19 11 22.54     27.19     ~ 1 0
70 [MSN2013] lae2666 G 15 51 49.161 +19 13 17.59     26.89     ~ 1 0
71 [MSN2013] lae2747 EmG 15 51 49.311 +19 08 44.33     26.84     ~ 1 0
72 [MSN2013] C12 G 15 51 49.360 +19 09 52.55     24.93     ~ 1 0
73 [MSN2013] lae2796 EmG 15 51 49.579 +19 10 41.28     26.69     ~ 1 0
74 [MSN2013] lae2984 G 15 51 49.685 +19 10 58.10     24.92     ~ 2 0
75 [MSN2013] lae2856 EmG 15 51 49.718 +19 10 49.05     25.85     ~ 1 0
76 [MSN2013] D11 G 15 51 49.764 +19 09 02.94     23.72     ~ 1 0
77 [MSN2013] lae2854 EmG 15 51 49.793 +19 12 47.89           ~ 1 0
78 [MSN2013] lae2949 EmG 15 51 49.870 +19 10 53.62     27.45     ~ 1 0
79 [MSN2013] lae2966 EmG 15 51 49.995 +19 10 41.59     26.87     ~ 2 0
80 [MSN2013] lae3038 G 15 51 50.091 +19 09 02.19     26.25     ~ 2 0
81 [MSN2013] C14 G 15 51 50.616 +19 09 18.46     24.87     ~ 1 0
82 [MSN2013] MD9 G 15 51 50.711 +19 09 38.20     24.13     ~ 2 0
83 [MSN2013] lae3167 EmG 15 51 50.781 +19 10 34.29     26.89     ~ 1 0
84 [MSN2013] lae3208 EmG 15 51 50.908 +19 11 16.18     27.32     ~ 1 0
85 [MSN2013] lae3339 G 15 51 51.352 +19 10 19.50     25.39     ~ 1 0
86 [MSN2013] lae3354 EmG 15 51 51.525 +19 10 47.02     27.29     ~ 1 0
87 [MSN2013] lae3763 EmG 15 51 51.530 +19 10 58.22     26.60     ~ 1 0
88 [MSN2013] lae3348 G 15 51 51.561 +19 11 20.54     26.98     ~ 1 0
89 [MSN2013] lae3365 G 15 51 51.691 +19 11 20.50     26.78     ~ 1 0
90 [MSN2013] D13 G 15 51 51.724 +19 10 15.89     24.39     ~ 1 0
91 [MSN2013] lae3540 G 15 51 51.882 +19 10 41.16     24.56     ~ 2 0
92 [MSN2013] lae3616 G 15 51 52.218 +19 08 21.79     26.96     ~ 1 0
93 [MSN2013] lae3506 EmG 15 51 52.242 +19 11 41.01     27.58     ~ 1 0
94 [MSN2013] lae3866 EmG 15 51 52.742 +19 11 39.09     25.42     ~ 1 0
95 [MSN2013] lae3808 EmG 15 51 52.858 +19 11 41.05     25.75     ~ 1 0
96 [MSN2013] lae3798 EmG 15 51 53.127 +19 10 34.46     27.01     ~ 1 0
97 [MSN2013] lae1774 EmG 15 51 53.129 +19 10 57.03     25.04     ~ 1 0
98 [MSN2013] lae3828 EmG 15 51 53.228 +19 13 08.50     26.85     ~ 1 0
99 [MSN2013] D14 G 15 51 53.262 +19 11 01.00     24.87     ~ 1 0
100 [MSN2013] lae3922 EmG 15 51 53.457 +19 11 43.89     25.97     ~ 1 0
101 [MSN2013] GNB2861 G 15 51 53.603 +19 11 36.53     26.08     ~ 1 0
102 [MSN2013] M16 G 15 51 53.636 +19 09 29.49     25.28     ~ 2 0
103 [MSN2013] BX84 G 15 51 53.696 +19 12 24.64     24.41     ~ 1 0
104 [MSN2013] lae4079 G 15 51 54.023 +19 10 05.98     25.71     ~ 1 0
105 [MSN2013] lae4070 G 15 51 54.054 +19 10 26.76     27.47     ~ 2 0
106 [MSN2013] lae4147 EmG 15 51 54.158 +19 11 05.14     27.12     ~ 1 0
107 [MSN2013] lae4366 EmG 15 51 54.775 +19 11 06.42     25.75     ~ 1 0
108 [MSN2013] D16 G 15 51 54.848 +19 11 31.18     24.00 24.05   ~ 2 0
109 [MSN2013] C17 G 15 51 55.283 +19 12 19.48     24.92 24.85   ~ 2 0
110 [MSN2013] lae4468 G 15 51 55.367 +19 12 57.55     26.46     ~ 1 0
111 [MSN2013] lae4684 EmG 15 51 56.167 +19 11 56.65     26.15     ~ 1 0
112 [MSN2013] lae4680 EmG 15 51 56.206 +19 09 56.72     27.07     ~ 2 0
113 [MSN2013] lae4796 EmG 15 51 56.367 +19 11 06.15     26.30     ~ 1 0
114 [MSN2013] lae4730 EmG 15 51 56.413 +19 10 42.03     26.12     ~ 1 0
115 [MSN2013] lae4804 EmG 15 51 56.621 +19 12 26.86     26.99     ~ 1 0
116 [MSN2013] lae4882 EmG 15 51 56.873 +19 13 06.72     27.35     ~ 1 0
117 [MSN2013] lae4947 EmG 15 51 57.132 +19 08 48.24     25.49     ~ 1 0
118 [MSN2013] GNB5270 G 15 51 57.364 +19 09 53.38     25.14     ~ 1 0
119 [MSN2013] lae5995 G 15 51 57.435 +19 11 02.56     25.02     ~ 1 0
120 [MSN2013] lae5665 G 15 51 57.738 +19 12 27.59     25.31     ~ 1 0
121 [MSN2013] lae6041 G 15 51 57.864 +19 11 14.43     25.58     ~ 1 0
122 [MSN2013] lae5900 EmG 15 51 58.057 +19 11 21.84     25.42     ~ 1 0
123 [MSN2013] lae5720 EmG 15 51 58.755 +19 13 00.43           ~ 1 0
124 [MSN2013] lae5446 G 15 51 58.774 +19 12 46.40     26.01     ~ 1 0
125 [MSN2013] lae5713 EmG 15 51 58.999 +19 09 20.60           ~ 1 0
126 [MSN2013] lae5661 G 15 51 59.092 +19 12 39.74     26.31     ~ 1 0
127 [MSN2013] lae5740 EmG 15 51 59.315 +19 10 35.10     25.90     ~ 1 0
128 [MSN2013] lae5470 EmG 15 51 59.582 +19 11 40.17           ~ 1 0
129 [MSN2013] lae5458 G 15 51 59.695 +19 09 39.25     24.60     ~ 1 0
130 [MSN2013] GNB4769 G 15 51 59.873 +19 08 42.73     26.54     ~ 1 0
131 [MSN2013] lae5404 EmG 15 52 00.008 +19 08 54.42     27.16     ~ 1 0
132 [MSN2013] lae5322 EmG 15 52 00.102 +19 10 17.14     25.44     ~ 1 0
133 [MSN2013] C19 G 15 52 00.196 +19 10 08.73     24.41 24.78   ~ 2 0
134 [MSN2013] lae5371 G 15 52 00.270 +19 09 40.75     25.28     ~ 1 0
135 [MSN2013] C20 EmG 15 52 00.3960 +19 08 40.773     25.09     ~ 3 0
136 [MSN2013] D20 G 15 52 00.484 +19 10 27.55     24.11     ~ 1 0
137 [MSN2013] lae5252 G 15 52 00.519 +19 08 31.67     26.38     ~ 1 0
138 [MSN2013] lae5193 EmG 15 52 00.760 +19 10 53.36     26.21     ~ 1 0
139 [MSN2013] lae5157 G 15 52 01.016 +19 08 50.34           ~ 1 0
140 [MSN2013] lae5132 EmG 15 52 01.057 +19 09 47.89     27.18     ~ 1 0
141 [MSN2013] lae5200 G 15 52 01.083 +19 11 25.97     27.19     ~ 2 0
142 [MSN2013] M21 G 15 52 01.356 +19 13 00.78     25.14     ~ 1 0
143 [MSN2013] lae7893 EmG 15 52 01.861 +19 12 49.92           ~ 1 0
144 [MSN2013] lae7890 EmG 15 52 01.943 +19 12 42.47     26.13     ~ 2 0
145 [MSN2013] lae7830 EmG 15 52 02.146 +19 09 55.06           ~ 1 0
146 [MSN2013] lae7832 EmG 15 52 02.201 +19 10 48.59     24.83     ~ 2 0
147 [MSN2013] lae7803 EmG 15 52 02.304 +19 09 03.58     26.89     ~ 1 0
148 [MSN2013] lae7110 G 15 52 02.523 +19 12 07.71     26.96     ~ 1 0
149 [MSN2013] M22 EmG 15 52 02.7030 +19 09 40.011     24.77 24.85   ~ 3 0
150 [MSN2013] lae7577 EmG 15 52 03.189 +19 09 09.08           ~ 1 0
151 [MSN2013] lae2436 EmG 15 52 03.231 +19 12 52.43     24.11     ~ 2 0
152 [MSN2013] lae7642 G 15 52 03.478 +19 12 58.32     26.20     ~ 1 0
153 [MSN2013] lae7542 EmG 15 52 03.575 +19 12 50.73     25.48     ~ 1 0
154 [MSN2013] D23 G 15 52 03.743 +19 09 24.47     24.49     ~ 1 0
155 [MSN2013] C22 G 15 52 03.833 +19 09 43.21     24.65 24.61   ~ 2 0
156 [MSN2013] lae7247 G 15 52 04.452 +19 10 48.30     26.83     ~ 1 0
157 [MSN2013] lae7180 EmG 15 52 04.662 +19 11 42.19     26.38     ~ 2 0
158 [MSN2013] lae6979 EmG 15 52 04.940 +19 09 53.42     26.25     ~ 1 0
159 [MSN2013] D24 G 15 52 05.278 +19 09 45.17     24.24     ~ 2 0
160 [MSN2013] C24 G 15 52 05.618 +19 13 11.73     25.24     ~ 1 0
161 [MSN2013] M23 G 15 52 05.748 +19 12 08.72     24.85     ~ 2 0
162 [MSN2013] C25 EmG 15 52 06.069 +19 11 28.37     24.60 24.83   ~ 23 0
163 [MSN2013] lae6774 EmG 15 52 06.090 +19 11 36.81           ~ 1 0
164 [MSN2013] MD34 G 15 52 06.315 +19 12 48.60     24.23     ~ 2 0
165 [MSN2013] lae6662 EmG 15 52 06.357 +19 10 42.74     25.94     ~ 2 0
166 [MSN2013] lae6510 G 15 52 06.976 +19 12 03.51     25.94     ~ 2 0
167 [MSN2013] C27 G 15 52 07.041 +19 12 19.29     24.32 24.51   ~ 4 0
168 [MSN2013] lae6436 G 15 52 07.285 +19 11 54.07     26.30     ~ 1 0
169 [MSN2013] lae6312 EmG 15 52 07.610 +19 08 47.48     26.43     ~ 1 0
170 [MSN2013] lae6193 EmG 15 52 07.992 +19 11 23.26     26.10     ~ 1 0
171 [MSN2013] D25 G 15 52 07.999 +19 08 55.80     24.79 24.54   ~ 2 0
172 [MSN2013] D27 G 15 52 08.314 +19 09 48.82     23.95     ~ 1 0

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