2017MNRAS.471..267D

Query : 2017MNRAS.471..267D

2017MNRAS.471..267D - Mon. Not. R. Astron. Soc., 471, 267-278 (2017/October-2)

MUSE deep-fields: the Ly α luminosity function in the Hubble Deep Field-South at 2.91 < z < 6.64.

DRAKE A.B., GUIDERDONI B., BLAIZOT J., WISOTZKI L., HERENZ E.C., GAREL T., RICHARD J., BACON R., BINA D., CANTALUPO S., CONTINI T., DEN BROK M., HASHIMOTO T., MARINO R.A., PELLO R., SCHAYE J. and SCHMIDT K.B.

Abstract (from CDS):

We present the first estimate of the Ly α luminosity function using blind spectroscopy from the Multi Unit Spectroscopic Explorer, MUSE, in the Hubble Deep Field-South. Using automatic source-detection software, we assemble a homogeneously detected sample of 59 Ly α emitters covering a flux range of -18.0 < log10 (F) < -16.3 (erg s–1 cm–2), corresponding to luminosities of 41.4 < log10 (L) < 42.8 (erg s–1). As recent studies have shown, Ly α fluxes can be underestimated by a factor of 2 or more via traditional methods, and so we undertake a careful assessment of each object's Ly α flux using a curve-of-growth analysis to account for extended emission. We describe our self-consistent method for determining the completeness of the sample, and present an estimate of the global Ly α luminosity function between redshifts 2.91 < z < 6.64 using the 1/Vmax estimator. We find that the luminosity function is higher than many number densities reported in the literature by a factor of 2-3, although our result is consistent at the 1σ level with most of these studies. Our observed luminosity function is also in good agreement with predictions from semi-analytic models, and shows no evidence for strong evolution between the high- and low-redshift halves of the data. We demonstrate that one's approach to Ly α flux estimation does alter the observed luminosity function, and caution that accurate flux assessments will be crucial in measurements of the faint-end slope. This is a pilot study for the Ly α luminosity function in the MUSE deep-fields, to be built on with data from the Hubble Ultra Deep Field that will increase the size of our sample by almost a factor of 10.

Abstract Copyright: © 2017 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): surveys - galaxies: evolution - galaxies: formation - galaxies: high-redshift - galaxies: luminosity functions, mass function - cosmology: observations - cosmology: observations

VizieR on-line data: <Available at CDS (J/MNRAS/471/267): tablea1.dat>

Simbad objects: 62

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Number of rows : 62
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 NAME Hubble Ultra Deep Field reg 03 32 39.0 -27 47 29           ~ 1900 0
2 ACO 1689 ClG 13 11 29.5 -01 20 28           ~ 1178 0
3 HDFS J223251.66-603330.1 G 22 32 51.650 -60 33 30.24     28.42   28.67 ~ 6 0
4 [BBR2015] 561 G 22 32 51.720 -60 33 39.74           ~ 2 0
5 HDFS J223251.86-603327.8 G 22 32 51.860 -60 33 27.82     28.97   28.93 ~ 4 0
6 [LFR2003] 228 G 22 32 52.0917 -60 33 42.399   25.974 25.045   24.62 ~ 12 0
7 [CDD2000] 1433 G 22 32 52.110 -60 33 21.86         28.04 ~ 3 0
8 [CDD2000] 2416 G 22 32 52.160 -60 34 10.94     28.41   28.56 ~ 4 0
9 SB-WF 2708-1244 G 22 32 52.300 -60 33 46.73     28.93   28.00 ~ 6 0
10 [BBR2015] 563 G 22 32 52.380 -60 34 01.18           ~ 3 0
11 [CDD2000] 1779 G 22 32 52.570 -60 33 39.92     27.80   27.41 ~ 5 0
12 [BBR2015] 553 G 22 32 52.640 -60 33 55.89           ~ 3 0
13 [CDD2000] 1693 G 22 32 52.700 -60 33 34.85     28.78   27.84 ~ 4 0
14 [CDD2000] 1711 G 22 32 52.840 -60 33 35.57     30.73   28.03 ~ 4 0
15 [BBR2015] 552 G 22 32 53.240 -60 33 46.96           ~ 2 0
16 [BBR2015] 71 G 22 32 53.640 -60 33 55.03     25.86   25.34 ~ 2 0
17 [BBR2015] 546 G 22 32 53.690 -60 33 41.10           ~ 3 0
18 [BBR2015] 568 G 22 32 53.760 -60 33 35.55           ~ 3 0
19 [BBR2015] 557 G 22 32 53.770 -60 33 48.13           ~ 2 0
20 [BBR2015] 547 G 22 32 53.940 -60 34 06.19           ~ 3 0
21 [BBR2015] 558 G 22 32 54.410 -60 34 02.23           ~ 3 0
22 HDFS J223254.61-603355.0 G 22 32 54.690 -60 33 54.54     30.19   28.70 ~ 5 0
23 HDFS J223254.72-603354.3 G 22 32 54.700 -60 33 54.52     29.92   29.12 ~ 4 0
24 [LFR2003] 71 G 22 32 54.820 -60 34 14.12   29.008 28.072   25.83 ~ 7 0
25 [BBR2015] 578 G 22 32 55.090 -60 34 01.58           ~ 2 0
26 [BBR2015] 551 G 22 32 55.110 -60 34 01.09           ~ 3 0
27 [BBR2015] 453 G 22 32 55.140 -60 33 52.75     29.38   28.76 ~ 2 0
28 [LFR2003] 253 G 22 32 55.450 -60 33 40.23 30.508 28.397 27.467   26.40 ~ 7 0
29 SB-WF 2103-1934 G 22 32 55.600 -60 33 19.32     28.14   27.35 ~ 5 0
30 [BBR2015] 549 G 22 32 55.630 -60 33 40.70           ~ 3 0
31 [CDD2000] 2326 G 22 32 55.850 -60 34 06.59     28.30   28.69 ~ 5 0
32 [CDD2000] 2021 G 22 32 55.980 -60 33 52.07     29.30   28.62 ~ 4 0
33 NAME HDF-S reg 22 32 56 -60 33.0           ~ 580 0
34 [CDD2000] 2008 G 22 32 56.190 -60 33 51.55     29.09   28.86 ~ 3 0
35 [CDD2000] 1990 G 22 32 56.420 -60 33 50.45     28.80   29.17 ~ 3 0
36 [CDD2000] 1615 G 22 32 56.420 -60 33 30.47     28.40   27.51 ~ 5 0
37 [CDD2000] 2107 G 22 32 56.720 -60 33 56.29     29.62   29.13 ~ 3 0
38 HDFS J223256.73-603338.5 G 22 32 56.730 -60 33 38.55     28.00   27.26 ~ 7 0
39 [CDD2000] 1881 G 22 32 57.030 -60 33 44.45     29.55   29.06 ~ 4 0
40 [CDD2000] 2009 G 22 32 57.200 -60 33 51.67     28.52   27.93 ~ 5 0
41 [CDD2000] 1937 G 22 32 57.350 -60 33 47.36     29.25   28.95 ~ 3 0
42 [CDD2000] 1876 G 22 32 57.420 -60 33 38.70     30.13   28.85 ~ 3 0
43 SB-WF 1745-1206 G 22 32 57.510 -60 33 48.47   28.33 26.43   26.08 ~ 6 0
44 [BBR2015] 555 G 22 32 57.530 -60 33 54.46           ~ 2 0
45 [BBR2015] 492 G 22 32 57.880 -60 33 58.29     29.15   29.06 ~ 3 0
46 [CDD2000] 1584 G 22 32 57.940 -60 33 29.10     28.71   28.42 ~ 4 0
47 SB-WF 1673-1914 G 22 32 57.950 -60 33 20.23     28.16   27.28 ~ 5 0
48 HDFS J223257.98-603342.3 G 22 32 57.990 -60 33 42.25     28.42   27.92 ~ 8 0
49 [BBR2015] 577 G 22 32 58.070 -60 34 01.15           ~ 2 0
50 SB-WF 1615-1416 G 22 32 58.180 -60 33 40.10     29.02   27.81 ~ 5 0
51 HDFS J223258.50-603402.0 G 22 32 58.490 -60 34 01.96     29.36   28.75 ~ 4 0
52 [LFR2003] 106 G 22 32 58.600 -60 34 09.01 30.004 29.770 27.467   25.84 ~ 7 0
53 [CDD2000] 2452 G 22 32 58.610 -60 34 12.73     29.04   29.01 ~ 3 0
54 SB-WF 1480-0918 QSO 22 32 58.940 -60 34 00.07   28.5 26.71   26.47 ~ 7 0
55 SB-WF 1472-1871 G 22 32 59.030 -60 33 22.08     27.32   26.67 ~ 6 0
56 [LFR2003] 520 G 22 32 59.050 -60 33 25.45 31.825 28.374 27.652   26.90 ~ 7 0
57 [BBR2015] 560 G 22 32 59.140 -60 33 24.36           ~ 2 0
58 HDFS J223259.24-603346.9 G 22 32 59.240 -60 33 46.94   28.85 27.16   26.65 ~ 6 0
59 HDFS J223259.33-603406.7 G 22 32 59.330 -60 34 06.56 30.927 29.227 28.150   27.11 ~ 7 0
60 [BBR2015] 573 G 22 32 59.480 -60 34 12.96           ~ 2 0
61 [CDD2000] 1645 G 22 32 59.490 -60 33 32.05     29.16   29.26 ~ 3 0
62 [BBR2015] 498 G 22 32 59.500 -60 34 09.46     29.68   29.10 ~ 2 0

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