Table 1
Observed sample of Class I sources.
| Name | Region | αJ2000 (a) | δJ2000 (a) | d (b) | Vsys (c) | Lbol (d) |
|---|---|---|---|---|---|---|
| (h m s) | (° ′ ′′) | (pc) | (km s−1) | (L⊙) | ||
| L1489-IRS | Taurus | 04:04:43.1 | +26:18:56.4 | 141 | 7.3 | 3.5 |
| B5-IRS1 | Perseus | 03:47:41.6 | +32:51:43.5 | 294 | 10.2 | 5.0 |
| L1455-IRS1 | Perseus | 03:27:39.0 | +30:12:59.3 | 294 | 4.7 | 3.6 |
| L1551-IRS5 | Taurus | 04:31:34.1 | +18:08:05.1 | 141 | 6.4 | 30–40 |
Notes. (a)Coordinates: L1489-IRS from Jørgensen et al. (2009), B5-IRS1 and L1455-IRS1 from Hatchell et al. (2007) and Bergner et al. (2017), L1551-IRS5 from Froebrich (2005). (b)Distances from Zucker et al. (2019). (c)Present work. (d) Bolometric luminosities: L1489-IRS from Green et al. (2013), B5-IRS1 from Evans et al. (2009), L1455-IRS1 from Dunham et al. (2013), and L1551-IRS5 from Liseau et al. (2005).
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