Evidence for disks at an early stage in class 0 protostars?

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Table 1

Summary of combined observations.

Source	RA	Dec	Beam	PA^a	^b	σF ^c	F(1′′)^DSB ^d	^e
	(J2000)	(J2000)	′′	°	mJy/beam	mJy/beam	Jy

B1b-N	03:33:21.209	31:07:43.66	0.086 × 0.069	1.1	13.4	0.71	0.73 ± 0.07	2.4 ± 0.1
B1b-S	03:33:21.355	31:07:26.37	0.14 × 0.11	16	63.1	2.4	0.89 ± 0.08	2.8 ± 0.1

J0336+3218	03:36:30.108	32:18:29.34	0.065 × 0.045	180	356	0.4	0.35
J0359+3220	03:59:44.913	32:20:47.16	0.064 × 0.048	180	150	0.3	0.15

Notes.

^(a)

Beam position angle,

^(b)

peak flux density using both sidebands,

^(c)

rms noise level,

^(d)

flux density integrated in a 1′′ radius circular aperture,

^(e)

spectral index between 32 and 350 GHz in a 0.3′′ radius circular aperture.

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