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N2H+ depletion in the massive protostellar cluster AFGL 5142
Gemma Busquet, Robert Estalella, Qizhou Zhang +4
We aim at investigating with high angular resolution the NH3/N2H+ ratio toward the high-mass star-forming region AFGL 5142 in order to study whether this ratio behaves similarly to…
IRAS 22198+6336: Discovery of an Intermediate-Mass Hot Core
Alvaro Sanchez-Monge, Aina Palau, Robert Estalella +4
We present new SMA and PdBI observations of the intermediate-mass object IRAS 22198+6336 in the millimeter continuum and in several molecular line transitions. The millimeter conti…
The NH2D/NH3 ratio toward pre-protostellar cores around the UCHII region in IRAS 20293+3952
G. Busquet, Aina Palau, R. Estalella +5
The deuterium fractionation, Dfrac, has been proposed as an evolutionary indicator in pre-protostellar and protostellar cores of low-mass star-forming regions. We investigate Dfrac…
Multiple shells around G79.29+0.46 revealed from near-IR to millimeter data
F. M. Jiménez-Esteban, J. R. Rizzo, Aina Palau
Aiming to perform a study of the warm dust and gas in the luminous blue variable star G79.29+0.46 and its associated nebula, we present infrared Spitzer imaging and spectroscopy, a…
The reflection-symmetric wiggle of the young protostellar jet HH 211
Chin-Fei Lee, Tatsuhiko I. Hasegawa, Naomi Hirano +4
HH 211 is a highly collimated jet originating from a nearby young Class 0 protostar. Here is a follow-up study of the jet with our previous observations at unprecedented resolution…