2017A&A...608A...8L

Query : 2017A&A...608A...8L

2017A&A...608A...8L - Astronomy and Astrophysics, volume 608A, 8-8 (2017/12-1)

The MUSE Hubble Ultra Deep Field Survey. VIII. Extended Lyman-α haloes around high-z star-forming galaxies.

LECLERCQ F., BACON R., WISOTZKI L., MITCHELL P., GAREL T., VERHAMME A., BLAIZOT J., HASHIMOTO T., HERENZ E.C., CONSEIL S., CANTALUPO S., INAMI H., CONTINI T., RICHARD J., MASEDA M., SCHAYE J., MARINO R.A., AKHLAGHI M., BRINCHMANN J. and CAROLLO M.

Abstract (from CDS):

We report the detection of extended Lyα haloes around 145 individual star-forming galaxies at redshifts 3≤z≤6 in the Hubble Ultra Deep Field observed with the Multi-Unit Spectroscopic Explorer (MUSE) at ESO-VLT. Our sample consists of continuum-faint (-15≥M_UV≥-22) Lyα emitters (LAEs). Using a 2D, two-component (continuum-like and halo) decomposition of Lyα emission assuming circular exponential distributions, we measure scale lengths and luminosities of Lyα haloes. We find that 80% of our objects having reliable Lyα halo measurements show Lyα emission that is significantly more extended than the UV continuum detected by HST (by a factor ~=4 to >20). The median exponential scale length of the Lyα haloes in our sample is ~=4.5kpc with a few haloes exceeding 10kpc. By comparing the maximal detected extent of the Lyα emission with the predicted dark matter halo virial radii of simulated galaxies, we show that the detected Lyα emission of our selected sample of Lyα emitters probes a significant portion of the cold circum-galactic medium of these galaxies (>50% in average). This result therefore shows that there must be significant HI reservoirs in the circum-galactic medium and reinforces the idea that Lyα haloes are ubiquitous around high-redshift Lyα emitting galaxies. Our characterization of the Lyα haloes indicates that the majority of the Lyα flux comes from the halo (~=65%) and that their scale lengths seem to be linked to the UV properties of the galaxies (sizes and magnitudes). We do not observe a significant Lyα halo size evolution with redshift, although our sample for z>5 is very small. We also explore the diversity of the Lyα line profiles in our sample and we find that the Lyα lines cover a large range of full width at half maximum (FWHM) from 118 to 512km/s. While the FWHM does not seem to be correlated to the Lyα scale length, most compact Lyα haloes and those that are not detected with high significance tend to have narrower Lyα profiles (<350km/s). Finally, we investigate the origin of the extended Lyα emission but we conclude that our data do not allow us to disentangle the possible processes, i.e. scattering from star-forming regions, fluorescence, cooling radiation from cold gas accretion, and emission from satellite galaxies.

Abstract Copyright: © ESO, 2017

Journal keyword(s): galaxies: high-redshift - galaxies: formation - galaxies: evolution - cosmology: observations - cosmology: observations

VizieR on-line data: <Available at CDS (J/A+A/608/A8): tableb1.dat>

Simbad objects: 186

Full paper

View the references in ADS

Number of rows : 186

N	Identifier	Otype	ICRS (J2000) RA	ICRS (J2000) DEC	Mag U	Mag B	Mag V	Mag R	Mag I	Sp type	#ref 1850 - 2024	#notes
1	UDF 5784	G	03 32 30.126	-27 47 17.62		27.3100	26.0773			~	8	0
2	MUSE-WIDE 135028218	EmG	03 32 30.667	-27 47 11.35						~	4	0
3	ZFOURGE CDFS 16508	G	03 32 31.856	-27 47 42.14		27.7934			26.78	~	6	0
4	MUSE-WIDE 135002046	EmG	03 32 31.978	-27 47 12.21		27.2906	26.70			~	11	0
5	MUSE-WIDE 135006171	EmG	03 32 31.986	-27 47 22.81		29.1528	27.98			~	8	0
6	[RTG2015] 10483	G	03 32 32.025	-27 47 13.55						~	5	0
7	UDF 7116	G	03 32 32.088	-27 46 57.87			29.50			~	5	0
8	ZFOURGE CDFS 16877	G	03 32 32.430	-27 47 32.20		27.9074				~	7	0
9	UDF 4211	G	03 32 32.446	-27 47 42.34		30.6743	31.59			~	5	0
10	UDF 3560	G	03 32 32.45	-27 47 51.7		31.52	27.68			~	6	0
11	[RTG2015] 6470	G	03 32 32.588	-27 47 43.70		27.7083				~	3	0
12	UDF 3398	EmG	03 32 32.618	-27 47 54.09		31.51	31.20			~	17	1
13	UDF 6098	G	03 32 32.929	-27 47 14.36			28.87			~	7	0
14	[RTG2015] 10189	G	03 32 33.039	-27 46 57.21		31.1512				~	3	0
15	UDF 7352	G	03 32 33.046	-27 46 52.56		35.4225	28.8200			~	12	0
16	[IBB2017] 2515	G	03 32 33.100	-27 47 15.87		28.6660				~	4	0
17	UDF 4324	G	03 32 33.158	-27 47 40.72		30.5454	28.80			~	5	0
18	UDF 8727	G	03 32 33.219	-27 46 37.99			30.08			~	5	0
19	MUSE-WIDE 135041231	EmG	03 32 33.259	-27 47 24.78		30.0432	28.44		27.30	~	25	0
20	UDF 8419	G	03 32 33.997	-27 46 29.78		28.9950	27.1305			~	11	0
21	UDF 3591	G	03 32 34.082	-27 47 50.67		29.4281	26.5200			~	14	0
22	GOODS-MUSIC 10778	G	03 32 34.094	-27 46 47.21			30.55			~	16	0
23	MUSE-WIDE 134003003	EmG	03 32 34.328	-27 47 59.55		27.1769	26.2877			~	16	0
24	[RTG2015] 21877	G	03 32 34.363	-27 47 48.79		29.1101				~	3	0
25	UDF 6056	G	03 32 34.380	-27 47 12.58	25.8279	25.8735	25.73			~	14	0
26	GOODS-MUSIC 10087	EmG	03 32 34.415	-27 47 16.81		27.0158	25.94			~	17	0
27	[RTG2015] 6080	G	03 32 34.564	-27 47 37.84						~	3	0
28	UDF 5678	G	03 32 34.919	-27 47 20.38			29.14			~	7	0
29	GOODS-MUSIC 9830	G	03 32 35.050	-27 47 29.72		27.3096	26.19			~	15	0
30	UDF 6475	G	03 32 35.060	-27 47 07.52			30.13			~	10	0
31	UDF 2894	G	03 32 35.100	-27 48 02.92			29.55			~	9	0
32	[RTG2015] 9895	G	03 32 35.192	-27 46 46.16		29.9087				~	3	0
33	ZFOURGE CDFS 17424	G	03 32 35.217	-27 47 15.53		29.2974	27.49			~	10	0
34	[RTG2015] 5195	G	03 32 35.258	-27 47 24.69		28.0086				~	3	0
35	[IBB2017] 6506	G	03 32 35.41584	-27 48 14.3271						~	2	0
36	[RTG2015] 6349	G	03 32 35.534	-27 47 42.00						~	5	0
37	[CBS2006] 8003	G	03 32 35.705	-27 46 18.13		27.7439				~	6	0
38	UDF 2736	G	03 32 35.982	-27 48 06.24		32.4407	28.3989			~	12	0
39	UDF 8566	G	03 32 36.008	-27 46 34.74		29.4100	28.15			~	7	0
40	[RTG2015] 8277	G	03 32 36.057	-27 45 59.18	28.7252	28.6679				~	3	0
41	[IBB2017] 2370	G	03 32 36.115	-27 45 54.85		28.5720				~	5	0
42	UDF 2729	G	03 32 36.140	-27 48 07.06		30.0561	28.64			~	6	0
43	[RTG2015] 6408	G	03 32 36.241	-27 47 42.72		31.5899				~	3	0
44	UDF 7050	G	03 32 36.249	-27 46 58.32		30.3142	29.48			~	13	0
45	GOODS-MUSIC 10330	G	03 32 36.372	-27 47 07.25		28.1703	26.33			~	15	0
46	UDF 2554	G	03 32 36.41078	-27 48 09.9484		30.02	28.56			~	4	0
47	ZFOURGE CDFS 14919	G	03 32 36.472	-27 48 28.72			28.37			~	6	0
48	[IBB2017] 6512	G	03 32 36.49497	-27 47 33.3783						~	2	0
49	[RTG2015] 9873	G	03 32 36.511	-27 46 45.48		29.3800				~	3	0
50	[RTG2015] 2515	G	03 32 36.576	-27 48 14.09		29.3382				~	3	0
51	UDF 3547	G	03 32 36.598	-27 47 51.75		27.7015	27.059			~	8	0
52	[IBB2017] 6341	G	03 32 36.60950	-27 47 01.6714						~	4	0
53	[RTG2015] 24196	G	03 32 36.623	-27 46 32.80						~	3	0
54	[TIB2005] 342	G	03 32 36.633	-27 47 21.65		31.24	27.85			~	8	0
55	UDF 4119	G	03 32 36.673	-27 47 43.48		30.0465	27.86			~	6	0
56	UDF 1936	G	03 32 36.719	-27 48 21.62		28.2108	26.7389			~	13	0
57	[RTG2015] 4522	G	03 32 36.729	-27 47 12.14						~	3	0
58	UDF 1800	G	03 32 36.742	-27 48 25.38		30.4705	28.85			~	6	0
59	GOODS J033236.83-274558.0	G	03 32 36.826	-27 45 58.03	27.7861	27.1207	25.178		24.6472	~	29	0
60	[IBB2017] 218	G	03 32 36.832	-27 46 37.19	28.8358	28.0280				~	6	0
61	UDF 8688	G	03 32 36.858	-27 46 36.45			30.63			~	7	0
62	UDF 8866	G	03 32 36.922	-27 46 45.27			29.15			~	7	0
63	UDF 5029	G	03 32 36.926	-27 47 30.06		29.6038	28.17			~	5	0
64	UDF 3327	G	03 32 36.981	-27 47 55.64		29.2265	27.59			~	7	0
65	[RTG2015] 24874	G	03 32 37.018	-27 46 29.75						~	5	0
66	[RTG2015] 24627	G	03 32 37.103	-27 46 13.86		30.4135				~	3	0
67	UDF 8681	G	03 32 37.198	-27 46 36.36		29.2915	28.05			~	7	0
68	UDF 1763	G	03 32 37.198	-27 48 25.16	29.8577	29.6900	27.3604			~	11	0
69	[RTG2015] 7531	G	03 32 37.236	-27 45 44.51		28.1029				~	3	0
70	UDF 5443	G	03 32 37.467	-27 47 23.24		27.8295	26.8875		26.80	~	10	0
71	UDF 1392	G	03 32 37.525	-27 48 34.52		30.161	30.86			~	8	0
72	UDF 1911	G	03 32 37.539	-27 48 23.05		29.3563	28.24			~	5	0
73	UDF 8839	G	03 32 37.623	-27 46 47.30		31.2926	29.12			~	5	0
74	UDF 9187	G	03 32 37.631	-27 46 08.99		31.3747	30.28			~	7	0
75	UDF 2204	G	03 32 37.665	-27 48 16.87		30.6333	28.72			~	8	0
76	[RTG2015] 940	G	03 32 37.667	-27 48 58.11						~	4	0
77	[ADW2016b] ID13	G	03 32 37.689	-27 46 21.54						~	9	0
78	UDF 8470	G	03 32 37.790	-27 46 32.02		30.8422	28.17			~	7	0
79	UDF 9582	G	03 32 37.817	-27 45 52.94		28.3210	26.64		25.77	~	14	0
80	[BIO2015] GSDB-2378347521	G	03 32 37.83	-27 47 52.1						~	5	0
81	UDF 9003	G	03 32 37.887	-27 46 48.00			32.06			~	7	0
82	UDF 6139	G	03 32 37.948	-27 47 10.94		29.8087	26.81			~	21	0
83	UDF 1751	G	03 32 37.994	-27 48 25.82			27.85			~	11	0
84	UDF 985	G	03 32 38.008	-27 48 48.35		29.1257	27.1154			~	11	0
85	[RTG2015] 9006	G	03 32 38.032	-27 46 16.33		30.3919				~	3	0
86	UDF 6775	G	03 32 38.197	-27 47 02.79		30.0658	28.39			~	7	0
87	UDF 6625	G	03 32 38.223	-27 47 05.88		31.1078	29.33			~	8	0
88	[RTG2015] 7233	G	03 32 38.232	-27 45 39.21		28.8961				~	3	0
89	UDF 1257	G	03 32 38.438	-27 48 39.15		30.4556	28.71			~	5	0
90	UDF 9191	G	03 32 38.526	-27 46 07.57			29.57			~	7	0
91	UDF 7771	G	03 32 38.533	-27 46 15.93		31.44	28.77			~	7	0
92	[ADW2016b] ID21	G	03 32 38.546	-27 46 17.53						~	16	0
93	UDF 2231	G	03 32 38.595	-27 48 16.16			29.33			~	8	0
94	UDF 2750	G	03 32 38.608	-27 48 04.04	28.7218	27.8913	26.55		26.11	~	15	0
95	UDF 3444	G	03 32 38.745	-27 47 54.42		30.7220	29.13			~	7	0
96	CANDELS GDS F160W J033238.86-274908.7	EmG	03 32 38.873	-27 49 08.71		29.2158	26.20		25.3012	~	24	0
97	UDF 741	G	03 32 38.938	-27 48 56.76		27.5356	25.9409		25.90	~	13	0
98	ZFOURGE CDFS 16727	G	03 32 38.960	-27 47 34.82		28.5410	26.62			~	11	0
99	CANDELS GDS F160W J033238.97-274617.7	G	03 32 38.974	-27 46 17.76		27.7190				~	8	0
100	UDF 7170	G	03 32 38.980	-27 46 55.88		26.66	26.59			~	5	0
101	NAME Hubble Ultra Deep Field	reg	03 32 39.0	-27 47 29						~	1666	0
102	CANDELS GDS F160W J033239.01-274622.2	G	03 32 39.021	-27 46 22.29		27.3536	26.43			~	14	0
103	[FRM2009] CS2-7	EmG	03 32 39.028	-27 48 12.98		31.0387	28.71			~	10	0
104	UDF 2599	G	03 32 39.039	-27 48 08.28			28.61			~	13	0
105	UDF 9926	G	03 32 39.066	-27 45 29.81		29.2536	27.75			~	8	0
106	GOODS J033239.06-274538.7	EmG	03 32 39.066	-27 45 38.75		30.7705	38.76			~	20	0
107	[RTG2015] 4805	G	03 32 39.098	-27 47 06.66						~	5	0
108	[RTG2015] 25090	G	03 32 39.162	-27 46 44.81		29.4878				~	3	0
109	ZFOURGE CDFS 14164	G	03 32 39.232	-27 48 49.85		26.4134			25.53	~	9	0
110	UDF 7322	G	03 32 39.233	-27 46 53.19		30.6961	29.43			~	7	0
111	UDF 7868	G	03 32 39.294	-27 46 44.67		27.4433	26.72			~	15	0
112	UDF 8948	G	03 32 39.350	-27 46 46.88		28.5784	27.413			~	13	0
113	[IBB2017] 6462	G	03 32 39.35410	-27 47 58.4581						~	3	0
114	[RTG2015] 20282	G	03 32 39.372	-27 49 08.54		29.0035				~	3	0
115	[TIB2005] 734	G	03 32 39.484	-27 46 25.97		31.0644	29.39			~	8	0
116	ZFOURGE CDFS 20771	G	03 32 39.544	-27 45 41.53		27.8558	27.07			~	6	0
117	[IBB2017] 6319	G	03 32 39.76877	-27 46 52.5296						~	2	0
118	UDF 7948	G	03 32 39.775	-27 46 18.18		30.9085	28.04		27.65	~	9	0
119	MUSE-WIDE 124028058	EmG	03 32 39.776	-27 48 59.26		30.70	28.27			~	12	0
120	UDF 7044	G	03 32 39.847	-27 46 57.99		31.54	27.78			~	9	0
121	[RTG2015] 1847	G	03 32 39.945	-27 48 28.49		29.5115				~	3	0
122	[EBE2007] 23-6714	EmG	03 32 40.013	-27 48 14.99			29.013		26.7186	~	48	0
123	PEARS s94627	EmG	03 32 40.174	-27 46 00.54		29.8866	27.26			~	15	0
124	UDF 8387	G	03 32 40.224	-27 46 28.99	28.8639	27.6200	26.93			~	11	0
125	UDF 2368	G	03 32 40.225	-27 48 13.65		29.2942	27.86			~	9	0
126	[IBB2017] 6317	G	03 32 40.24252	-27 46 38.7613						~	3	0
127	UDF 9026	G	03 32 40.288	-27 46 43.02		28.7925	27.37			~	12	0
128	GOODS J033240.30-274752.6	AGN	03 32 40.296	-27 47 52.63	27.4823	26.0835	25.053	25.042		~	24	0
129	[IBB2017] 7159	G	03 32 40.303	-27 48 44.38		28.2427				~	6	0
130	UDF 8449	G	03 32 40.337	-27 46 30.95		28.5703	27.20			~	10	0
131	UDF 10006	G	03 32 40.371	-27 45 42.35		30.1075	28.14			~	7	0
132	GOODS-MUSIC 10662	G	03 32 40.387	-27 46 51.80		26.1137	25.594			~	12	0
133	UDF 20183	G	03 32 40.396	-27 48 47.69		33.1342				~	11	0
134	UDF 2285	G	03 32 40.401	-27 48 14.86			29.54			~	10	0
135	[RTG2015] 4004	G	03 32 40.535	-27 47 47.50						~	4	0
136	[RTG2015] 10077	G	03 32 40.620	-27 46 52.52		28.4703				~	4	0
137	UDF 8014	G	03 32 40.707	-27 46 21.40	28.2931	27.8537	27.732			~	6	0
138	UDF 7844	G	03 32 40.742	-27 46 21.00	28.9572	28.3800	27.21			~	7	0
139	UDF 2431	G	03 32 40.755	-27 48 12.11		28.9969	27.65			~	8	0
140	UDF 8660	G	03 32 40.776	-27 46 36.74		32.28	29.91			~	7	0
141	GOODS-MUSIC 11670	EmG	03 32 40.785	-27 46 06.02		25.6088	24.960	25.33		~	21	0
142	[BIB2006] HUDF-40816301	G	03 32 40.815	-27 46 30.13						~	7	0
143	[RTG2015] 7572	G	03 32 40.827	-27 46 51.72		31.3943				~	3	0
144	[CBS2006] 31083	G	03 32 40.831	-27 48 31.64						~	6	0
145	UDF 8602	G	03 32 40.848	-27 46 38.35		31.01	28.85			~	7	0
146	[IBB2017] 6316	G	03 32 40.87895	-27 46 42.0715						~	4	0
147	UDF 7388	G	03 32 41.039	-27 46 52.28		29.2192	28.36			~	7	0
148	UDF 9040	G	03 32 41.085	-27 46 42.46	29.7495	29.7221	27.73			~	21	0
149	UDF 1846	G	03 32 41.314	-27 48 24.24			30.23			~	5	0
150	UDF 8853	G	03 32 41.487	-27 46 47.19		31.1678	28.91			~	7	0
151	UDF 9310	G	03 32 41.563	-27 46 04.08		29.4631	28.09			~	6	0
152	ZFOURGE CDFS 17968	G	03 32 41.593	-27 47 01.75		30.5846	27.71			~	12	0
153	[IBB2017] 6521	G	03 32 41.72117	-27 48 01.2117						~	3	0
154	UDF 5331	G	03 32 41.805	-27 47 23.73		29.7934	27.341		27.03	~	10	0
155	ZFOURGE CDFS 18691	G	03 32 41.901	-27 46 40.32		27.8725	27.14			~	9	0
156	UDF 4765	G	03 32 42.233	-27 47 33.41		29.5786	26.86			~	9	0
157	ZFOURGE CDFS 15590	G	03 32 42.300	-27 48 09.68		27.9613	27.295			~	9	0
158	GOODS-MUSIC 10829	G	03 32 42.311	-27 46 44.09		26.6386	25.55			~	8	0
159	UDF 7682	G	03 32 42.367	-27 46 15.73						~	7	0
160	ZFOURGE CDFS 19932	G	03 32 42.381	-27 46 06.99		28.0449				~	7	0
161	GOODS-MUSIC 9938	G	03 32 42.758	-27 47 24.69		28.1644	27.04			~	14	0
162	[RTG2015] 9749	G	03 32 42.774	-27 46 40.53	29.9673	29.7091				~	3	0
163	GOODS-MUSIC 11226	G	03 32 42.780	-27 46 26.39		26.7973	25.77			~	15	0
164	UDF 8609	G	03 32 42.787	-27 46 35.29		30.1469	28.23			~	7	0
165	UDF 3291	G	03 32 42.887	-27 47 55.81		28.6371	26.9072			~	12	0
166	UDF 6142	G	03 32 42.984	-27 47 13.10		30.9403	28.77			~	7	0
167	UDF 2898	G	03 32 43.158	-27 48 03.16		36.61	28.3825			~	12	0
168	[RTG2015] 8943	G	03 32 43.301	-27 46 14.09						~	3	0
169	ZFOURGE CDFS 19239	G	03 32 43.404	-27 46 26.85		29.8495	28.579			~	10	0
170	UDF 7390	G	03 32 43.441	-27 46 52.03			27.88			~	7	0
171	[RTG2015] 3159	G	03 32 43.680	-27 48 01.56		29.2767				~	3	0
172	[IBB2017] 2460	G	03 32 43.796	-27 47 38.67		28.4444				~	5	0
173	UDF 9057	G	03 32 43.919	-27 46 49.66		32.1554	27.8454			~	11	0
174	UDF 3672	G	03 32 44.204	-27 47 50.37		29.8525	27.93			~	5	0
175	UDF 5087	G	03 32 44.253	-27 47 28.54			27.4590			~	10	0
176	UDF 6722	G	03 32 44.26359	-27 47 03.7091		28.39	27.24			~	5	0
177	ZFOURGE CDFS 17985	G	03 32 44.418	-27 47 02.21	29.0416	28.7492	27.25			~	9	0
178	UDF 6979	G	03 32 44.581	-27 47 00.26			29.58			~	5	0
179	UDF 4413	G	03 32 44.744	-27 47 39.35		31.2836	29.17			~	5	0
180	UDF 4678	G	03 32 44.748	-27 47 34.06		30.9857	26.6302			~	13	0
181	[CBS2006] 5839	G	03 32 45.09385	-27 47 17.5275						~	4	0
182	UDF 5011	G	03 32 45.844	-27 47 29.93		31.4993	29.91			~	5	0
183	[RTG2015] 10611	G	03 32 46.239	-27 47 26.40						~	3	0
184	UDF 6135	G	03 32 46.291	-27 47 12.83			27.93			~	7	0
185	[IBB2017] 6498	G	03 32 46.75931	-27 47 04.5778						~	5	0
186	NAME HDF-S	reg	22 32 56	-60 33.0						~	570	0

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