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Table 2

Observational IRAM-30 m settings.

Source Tsys ton δν δV HPBW
(K) (h) (MHz) (km s−1) (′′)
(au)
L1489-IRS 450 26.3 0.20 0.25–0.27 10–11
1400–1550
B5-IRS1 350 23.2 0.20 0.25–0.27 10–11
2900–3200
L1455-IRS1 540 43.4 0.20 0.25–0.27 10–11
2900–3200
L1551-IRS5 351 27.6 0.20 0.25–0.27 10–11
1400–1550

Notes. The spectral windows are 214.5–222.2 GHz and 230.2–238.0 GHz. Forward efficiency (Feff) and beam efficiency (Beff) are 0.93 and 0.60, respectively. Tsys, ton, δν and δV, and HPBW are system temperature, on-source observing time, spectral resolution in units of MHz and km s−1, and the halfpower beam width, respectively.

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