Observations of HC 5 N (J=12-11 and 13-12) and HC 7 N (J=28-27), Including a Detection of B335

摘要: The Onsala 20 m telescope, equipped with a travelling wave maser (frequency range ∼29-35 GHz; zenith system noise temperature ∼90-160 K) has been used in search for HC 5 N (J=12-11 and 13-12) 7 (J = 28-27) to low detection limit. In addition observations of the Taurus dust clouds TMC1, TMC2 L1544, =13-12) transition detected at level (T A ∗ ∼ 0.1 K; p-t-p K velocity resolution 0.04 km s -1 ) isolated globule B335. total column density estimated from very narrow line (Δv 0.2 is 6·10 11 cm -2 . From our non-detection L134N ≲ 5·10 deduced.