1999ApJ...518L...5B

Query : 1999ApJ...518L...5B

1999ApJ...518L...5B - Astrophys. J., 518, L5-L8 (1999/June-2)

Resolving the submillimeter background: the 850 micron galaxy counts.

BARGER A.J., COWIE L.L. and SANDERS D.B.

Abstract (from CDS):

Recent deep blank-field submillimeter surveys have revealed a population of luminous high-redshift galaxies that emit most of their energy in the submillimeter. The results suggest that much of the star formation at high redshift may be hidden to optical observations. In this Letter we present wide-area 850 µm Submillimeter Common-User Bolometer Array data on the Hawaii Survey Fields SSA13, SSA17, and SSA22. Combining these new data with our previous deep-field data, we establish the 850 µm galaxy counts from 2 to 10 mJy with a greater than 3 σ detection limit. The area coverage is 104 arcmin² to 8 mJy and 7.7 arcmin² to 2.3 mJy. The differential 850 µm counts are well described by the function n(S)=N₀/(a+S^3.2), where S is the flux in mJy, N₀=3.0x10⁴ deg^–2.mJy^–1, and a=0.4-1.0 is chosen to match the 850 µm extragalactic background light. Between 20% and 30% of the 850 µm background resides in sources brighter than 2 mJy. Using an empirical fit to our data above 2 mJy constrained by the extragalactic background light at lower fluxes, we argue that the bulk of the 850 µm extragalactic background light resides in sources with fluxes near 1 mJy. The submillimeter sources are plausible progenitors of the present-day spheroidal population.

Abstract Copyright: ∼

Journal keyword(s): Cosmology: Observations - Galaxies: Evolution - Galaxies: Formation

Nomenclature: Table 1: [BCS99] JHHMMSS.s+DDMMSS N=21.

Simbad objects: 31

Full paper

View the references in ADS

Number of rows : 31

N	Identifier	Otype	ICRS (J2000) RA	ICRS (J2000) DEC	Mag B	Mag V	Mag R	Mag I	Sp type	#ref 1850 - 2026	#notes
1	[BCS99] J103356.5+574732	smm	10 33 56.5	+57 47 32					~	1	0
2	NAME J103402.3+574625.0	smm	10 34 02.4	+57 46 25					~	2	1
3	NAME Lockman Hole	reg	10 45 00.0	+58 00 00					~	910	0
4	US 371	BLL	13 10 28.66385420	+32 20 43.7828340	15.61	15.24	17.91		~	917	1
5	[BCS99] J131159.9+424030	smm	13 11 59.9	+42 40 30					~	1	0
6	[BCS99] J131205.1+424434	smm	13 12 05.1	+42 44 34					~	1	0
7	SSA 13	reg	13 12 16.5	+42 44 39					~	110	0
8	[BCS99] J131225.7+424350	PaG	13 12 25.7	+42 43 50	24.3				~	5	0
9	MCBA 15	X	13 12 28.25	+42 44 54.5					~	6	0
10	NAME SMM J131232.1+424428.0	PaG	13 12 32.1	+42 44 28					~	6	1
11	[BCS99] J132324.9+423956	smm	13 23 24.9	+42 39 56					~	1	0
12	[BCS99] J132326.3+424146	smm	13 23 26.3	+42 41 46					~	1	0
13	[BCS99] J132328.9+424559	smm	13 23 28.9	+42 45 59					~	1	0
14	[BCS99] J132329.8+423828	smm	13 23 29.8	+42 38 28					~	1	0
15	IC 1127	SyG	15 34 57.22396	+23 30 11.6084	14.76	13.88			~	3090	4
16	4C 38.41	Bla	16 35 15.49297809	+38 08 04.5005995	18.14	17.97	17.25		~	906	1
17	[BCS99] J170620.3+435404	smm	17 06 20.3	+43 54 04					~	1	0
18	[BCS99] J170625.0+435739	smm	17 06 25.0	+43 57 39					~	1	0
19	[BCS99] J170626.0+435440	smm	17 06 26.0	+43 54 40					~	1	0
20	SSA 17	reg	17 06 30.0	+43 55 40					~	15	0
21	[BCS99] J170633.1+435408	smm	17 06 33.1	+43 54 08					~	1	0
22	[BCS99] J170637.2+435531	smm	17 06 37.2	+43 55 31					~	1	0
23	NAME SMM J221724.7+001242	smm	22 17 24.682	+00 12 42.02	20.4				~	7	0
24	NAME SMM J221726+0013	EmO	22 17 25.97	+00 12 38.9	27		24.49		~	112	0
25	[BCS99] J221734.0+001542	smm	22 17 34.0	+00 15 42					~	1	0
26	[BCS99] J221734.1+001354	smm	22 17 34.1	+00 13 54					~	1	0
27	SSA 22	reg	22 17 34.7	+00 15 07					~	351	0
28	[BCS99] J221735.2+001532	smm	22 17 35.2	+00 15 32					~	2	0
29	NAME SMM J221735.84+001558.9	rG	22 17 35.86	+00 15 59.4	27.332	25.881	25.468	24.57	~	41	0
30	[BCS99] J221742.0+001602	smm	22 17 42.0	+00 16 02					~	1	0
31	3C 446	BLL	22 25 47.25929101	-04 57 01.3907626	18.83	18.39	16.3		~	863	1

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