Table 3
Location of the center position (in RA and Dec) and radius (in au and arcsecond) of each circular region, from which the spectra are extracted for the studied protostars.
| Source | RA | Dec | Pixel size | Radius | FWHM | Noise level | ||
|---|---|---|---|---|---|---|---|---|
| (J2000) | (J2000) | (″) | (au) | (″) | (km s−1) | (mJy beam−1 channel−1) | (mJy beam−1 km s−1) | |
| IRAS 16293-2422 A | 16 h 32 m 22.854 s | −24°28′ 36.465″ | 0.8 | 522 | 3.7 | 4.5 | 28 | 17.0 |
| IRAS 16293-2422 B | 16 h 32 m 22.671 s | −24°28′ 33.145″ | 0.8 | 522 | 3.7 | 1.0 | 32 | 9.2 |
| NGC 1333-IRAS4A | 03 h 29 m 10.509 s | +31°13′ 30.918″ | 1.1 | 822 | 3.5 | 1.8 | 29 | 11.2 |
| RCrA IRS7B | 19 h 01 m 56.402 s | −36°57′ 28.276″ | 0.8 | 730 | 4.3 | 1.0 | 21 | 6.0 |
| Per-B1-c | 03 h 33 m 17.880 s | +31°09′ 31.795″ | 1.2 | 879 | 3.0 | 2.2 | 11 | 13.4 |
| BHR71-IRS1 | 12 h 01 m 36.516 s | −65°08′ 49.298″ | 1.0 | 700 | 3.5 | 2.5 | 7 | 9.2 |
| Per-emb-25 | 03 h 26 m 37.514 s | +30°15′ 27.792″ | 1.1 | 600 | 3.0 | 1.0 | 11 | 9.0 |
| NGC 1333-IRAS4B | 03 h 29 m 12.019 s | +31°13′ 08.010″ | 1.2 | 879 | 3.0 | 2.0 | 11 | 12.9 |
| Ser-SMM3 | 18 h 29 m 59.311 s | +01°14′ 00.365″ | 0.9 | 1526 | 3.5 | 2.5 | 10 | 13.5 |
| TMC1 | 04h 41 m 12.700s | +25°46′ 34.800″ | 1.1 | 303 | 3.0 | 1.0 | 13 | 10.6 |
Notes. The pixel size (in arcsecond) for each source is also given. The noise levels in mJy beam−1 channel−1 and mJy beam−1 km s−1 of the protostars are deduced according to 
and noise (mJy−1 beam−1 channel−1) × 
× spectral resolution (km s−1), where n is the number of channels computed with 
, using the FWHM of the H2S line at 216.710GHz, respectively.
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