Table 2
Sample of unresolved multiple protostellar systems (separation <7″).
| System | RA (J2000) | Dec (J2000) | Separationa (″) |
|
|
|||
| NGC 1333 IRAS 4A | 03:29:10.51 | +31:13:31.01 | 1.828 |
| IRAS 03292+3039 | 03:32:17.95 | +30:49:47.60 | 0.085 |
| IRAS 03282+3035 | 03:31:21.00 | +30:45:30.00 | 0.098 |
| NGC 1333 IRAS 2A | 03:28:55.57 | +31:14:37.22 | 0.619 |
| NGC 1333 IRAS 2B | 03:28:57.35 | +31:14:15.93 | 0.311 |
| NGC 133 IRAS 7 Per18 | 03:29:11.26 | +31:18:31.08 | 0.081 |
| NGC 1333 IRAS 7 Per49 | 03:29:12.96 | +31:18:14.31 | 0.313 |
| L1448N C | 03:25:35.53 | +30:45:34.20 | 0.251 |
| L1448N B | 03:25:36.34 | +30:45:14.94 | 0.226 |
| Per17 | 03:27:39.09 | +30:13:03.00 | 0.273 |
| IC 348 MMS Per11 | 03:43:57.06 | +32:03:04.60 | 2.950 |
| NGC 1333 SVS13A | 03:29:03.75 | +31:16:03.76 | 0.3 |
| L1448 IRS2 | 03:25:22.40 | +30:45:12.00 | 0.751 |
| L1455 FIR2 | 03:27:38.23 | +30:13:58.80 | 0.346 |
| B1-a | 03:33:16.66 | +31:07:55.20 | 0.391 |
| EDJ2009-269 | 03:30:43.91 | +30:32:46.28 | 0.539 |
| IC 348 Per55 | 03:44:43.33 | +32:01:31.41 | 0.613 |
| EDJ2009-183 | 03:28:59.32 | +31:15:48.14 | 1.022 |
| L1448 IRS1 | 03:25:09.54 | +30:46:21.96 | 1.424 |
| NGC 1333 IRAS 1 | 03:28:37.00 | +31:13:27.00 | 1.908 |
| EDJ2009-156 | 03:28:51.11 | +31:18:15.41 | 3.192 |
| Per32 | 03:44:02.40 | +32:02:04.89 | 5.910 |
| HH211 | 03:43:56.80 | +32:00:50.21 | 0.3b |
| Per62 | 03:44:12.98 | +32:01:35.40 | 0.121c |
Notes.
Separations obtained from Tobin et al. (2016). Typical uncertainties in position are <0.1″.
The companion reported in Lee et al. (2009) appears to be substellar with an orbital period of 3000 yr, which could explain the jet precession. Lee et al. (2010) also argued for a third component at <30 AU, proposing that it is a very low-mass system.
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